CN105838007A - Polyvinyl alcohol powder soluble in water and preparation method thereof - Google Patents

Polyvinyl alcohol powder soluble in water and preparation method thereof Download PDF

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Publication number
CN105838007A
CN105838007A CN201610277210.4A CN201610277210A CN105838007A CN 105838007 A CN105838007 A CN 105838007A CN 201610277210 A CN201610277210 A CN 201610277210A CN 105838007 A CN105838007 A CN 105838007A
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pva
water
polyvinyl alcohol
powder
soluble
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CN105838007B (en
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崔跃飞
周向阳
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L29/00Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
    • C08L29/02Homopolymers or copolymers of unsaturated alcohols
    • C08L29/04Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/02Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

Abstract

The invention discloses polyvinyl alcohol powder soluble in water and a preparation method thereof .The polyvinyl alcohol (PVA) powder soluble in water is prepared from, by weight, 59-73 parts of polyvinyl alcohol powder (25-120 mesh), 3-10 parts of polyvinyl alcohol (PEG), 1-3 parts of surface wetting penetrant, 2-5 parts of compatilizer, 1-3 parts of tackifier and 20 parts of water .High-speed mixing treatment is carried out for 30 min at the temperature of 80 DEG C or above, then drying, crushing and screening are carried out, and the polyvinyl alcohol powder is prepared .The dissolving temperature of the polyvinyl alcohol powder treated through the technology in water is greatly reduced, the dissolving time of polyvinyl alcohol powder particles in the water is obviously shortened, and the efficiency of preparing a polyvinyl alcohol water solution is greatly improved .

Description

A kind of pva powder soluble in water and preparation method thereof
Technical field
The present invention relates to the modified field of polyvinyl alcohol, particularly to a kind of pva powder soluble in water and system thereof Preparation Method.
Background technology
Polyvinyl alcohol (PVA), as a kind of water soluble polymer, is widely used in preparing water miscible binding agent, coating etc. Material.Polyvinyl alcohol (PVA) is when being configured to aqueous solution, and conventional method is first to be dispersed in cold water, the most under agitation enters Row heating for dissolving, to be typically heated to 90 DEG C 95 DEG C, after completing to dissolve, keeps 30 minutes left sides the most at this temperature The right side, and maintain stirring the most fully to be dissolved and uniform polyvinyl alcohol water solution.In order to improve polyvinyl alcohol in water Dissolution velocity, a lot of polyvinyl alcohol product are directly processed into the powder of 25 120 mesh, make polyvinyl alcohol dissolution time in water Shorten and improve the efficiency of obtained aqueous solution;But due to the PVA of partial alcoholysis type in cold water the most swelling and be partly dissolved, institute Assemble parcel and phenomenon of uniting being easy to make the powder being added to the water to occur mutually, affect its dispersion in water and molten on the contrary Solve.And the solution that the technology of the present invention method is aiming at this problem and proposes, through the poly-second that the technology of the present invention is modified Enol (PVA) powder, not only can be dispersed in water uniformly not produce in course of dissolution and mutually assemble parcel and phenomenon of uniting, And there is dissolution velocity in water and soon and dissolve the dissolving in water of feature thoroughly, beneficially polyvinyl alcohol and improve preparation The efficiency of polyvinyl alcohol water solution.
The application of the present invention and use field are the various product of polyvinyl alcohol (PVA) aqueous solution and joining of intermediate products System, as polyvinyl alcohol glue, the putty with polyvinyl alcohol as binding agent, polyvinyl alcohol water solution curtain coating produce polyvinyl alcohol film The preparation etc. of raw material.Produce including all kinds of use polyvinyl alcohol and the field of obtained aqueous solution.
Summary of the invention
General polymer substance dissolving in a solvent is all first that then solvent molecule acts on macromolecular chain through swelling, It is allowed to solution and twines the process then dissolved.Polyvinyl alcohol dissolving in water is no exception, when granule of polyvinyl alcohol puts in water, Hydrone, first through being sufficiently humidified so as to granule of polyvinyl alcohol surface, then enters granule of polyvinyl alcohol and top layer starts solution and twines polyvinyl alcohol Macromolecular chain and realize swelling, the polyvinyl alcohol molecule chain twined by solution start to step in water realize dissolve.It can be seen that it is poly- Vinyl alcohol dissolving in water is such a process: granule of polyvinyl alcohol surface is moistened by hydrone, and hydrone is to polyethylene Alcohol granule top layer is permeated, and hydrone twines collection, polyvinyl alcohol with polyvinyl alcohol macromolecular chain effect releasing polyvinyl alcohol macromole Macromolecular chain unfold after being twined by solution step into water realizes dissolve.Namely moistening (surface)-infiltration (top layer)-effect- Solution twines-dissolves-and continue to permeate (deep layer)-effect-solution and twine-deep layer dissolving, this process is gradually completing.It is seen that, in phase Increase the specific surface area of granule of polyvinyl alcohol under the conditions of Tong (as temperature, concentration etc. are constant), water can be improved to granule of polyvinyl alcohol The wetting speed on surface and degree, such that it is able to improve dissolution velocity;And the specific surface area of granule of polyvinyl alcohol to be effectively improved It is necessary for allowing granule of polyvinyl alcohol become thinner, so, more tiny granule of polyvinyl alcohol is more beneficial for granule of polyvinyl alcohol and exists Dissolving in water.The technology of the present invention uses above-mentioned know-why exactly, by the ways and means of the technology of the present invention, makes polyethylene Alcohol granule in water quickly further fragmentation, refinement and its dissolution velocity in water is greatly improved.
The present invention is dispersed slow with dissolution velocity in order to overcome existing pva powder to be difficult in water, and dissolves Halfway defect, it is provided that a kind of PVAC polyvinylalcohol powder being easily dispersed in water and can dissolve rapidly and preparation method thereof, this The PVAC polyvinylalcohol powder that prepared by inventive method be easily dispersed in water is applicable to all kinds of use polyvinyl alcohol and produces and preparation water The application of solution.
It is known that polyglycol ether (PEG) is also a kind of water soluble polymer, and have splendid water-soluble in water Performance and water-soluble speed.
Meanwhile, also there are following features: 1, polyglycol ether and polyvinyl alcohol have splendid intermiscibility, energy in water Realize well-proportioned miscible;2, polyglycol ether dissolves very fast in water, the most also can be dissolved in the most thoroughly In water, so its dissolution velocity in water is apparently higher than polyvinyl alcohol;3, polyglycol ether and polyvinyl alcohol have non-in water The best compatibility and stability, but when water is non-existent time, the compatibility of polyglycol ether and polyvinyl alcohol is limited, And can become the most limited the most very poor along with the molecular weight of polyglycol ether increases this limited compatibility.
The realization of the technology of the present invention solution: use a certain amount of polyglycol ether exactly, by effective technical side Method and means, under certain conditions, allow polyglycol ether enter into inside granule of polyvinyl alcohol, make a dispersion phase Being present in granule of polyvinyl alcohol, when granule of polyvinyl alcohol to realize dissolving in water, polyglycol ether is due to splendid water Dissolubility can dissolve one step ahead and enter in water, and these as the polyglycol ether of dispersion phase because the most quickly dissolving into Enter in water, so can therefore form gap or the hole of many in the granule of polyvinyl alcohol of continuous phase, and make hydrone fast Speed enters into these gaps or hole and makes granule of polyvinyl alcohol be broken into thinner granule of polyvinyl alcohol further and improve water Molten speed, granule of polyvinyl alcohol also because this more fragmentation and refinement, makes granule of polyvinyl alcohol dissolve the most thorough.
A kind of pva powder soluble in water, the component of this pva powder and each component are at pva powder In content as follows:
Pva powder 59-73 wt%
Polyglycol ether 3-10 wt%
Surface wettability penetrating agent 1-3 wt%
Compatilizer 2-5 wt%
Viscosifier 1-3 wt%
Water 20 wt%.
Further, described polyvinyl alcohol (PVA) powder is the pva powder of complete alcoholysis or partial alcoholysis.
Optimize further, described pva powder is PVA-0599, PVA-1399, PVA-1599, PVA-1799, In PVA-2099, PVA-2299, PVA-2499, PVA-0588, PVA-1788, PVA-2088, PVA-2288 and PVA-2488 etc. One, fineness is 25-120 mesh.
Further, described polyglycol ether (PEG) be molecular weight be the polyglycol ether between 2000-20000.
Optimizing further, described polyglycol ether is PEG-2000, PEG-4000, PEG-6000, PEG-8000, PEG- More than one in 10000 and PEG-20000 etc..
Optimizing further, described surface wettability penetrating agent refers to have the relatively strong moistening and nonionic table of penetrating power Face activating agent or anionic surfactant.
Optimizing further, described surface wettability penetrating agent is the penetrating agent JFC of fatty alcohol polyethenoxy ether class, penetrating agent Nonionic surfactant or penetrating agent-T, penetrating agent-OEP, the infiltrations such as JFC-1, penetrant JFC-2, penetrating agent JFC-E One in the anionic surfactanies such as agent-AEP, penetrating agent-M.
Further, described compatilizer refers to the water solublity cellosolve type solvents with extremely strong solvability.
Optimizing further, described compatilizer is ethylene glycol monomethyl ether, ethylene glycol, butyl glycol ether, propylene glycol monomethyl ether, One in propylene-glycol ethyl ether and propandiol butyl ether etc..
Further, described viscosifier refer to a class material to polyvinyl alcohol with stronger plasticization capacity, this kind of material Viscosity after polyvinyl alcohol can being carried out effective plasticising and making polyvinyl alcohol dissolve in water increases and keeps viscosity Stability.This technological invention mainly uses there is water miscible amide substance.
Optimizing further, described viscosifier are the one in phosphoamide, caprolactam, Methanamide and acetamide etc..
The preparation method of above-described a kind of pva powder soluble in water, step is as follows:
1) press the above each component content in pva powder and measure each component, polyglycol ether, surface wettability Penetrating agent, compatilizer and viscosifier are soluble in water, obtain mixture, standby;
2) pva powder measured is joined in homogenizer, start stirring, under 1500 revs/min of high speeds, carry out height Speed stirring, because of the friction under high-speed stirred, material polyvinyl alcohol there will be intensification, until material pva powder is warming up to 80 After more than DEG C, the speed adjusting homogenizer is 300 revs/min, is initially added into step 1) gained mixture;
3), after adding, continue to start at a high speed to 1500 revs/min, after carrying out mixing 30 minutes under this mixing speed, adjust rotating speed extremely 300 revs/min, it is cooled to room temperature discharging;
4) material step 3) mixed, is dried at 100-120 DEG C, and dry run can be to be dried box-type drying, Can also be that screw extruder is dried, through pulverizing and sieving after being dried, obtain a kind of pva powder soluble in water.
Compared with existing pva powder, the present invention has the following advantages that and technique effect:
Existing undressed pva powder, is only typically all by grinding more carefully to accelerate pva powder in water Dissolution velocity, even so, its dissolving in water also must be heated to more than 90 DEG C and just can be completely dissolved, and whole molten Solution preocess is slow, takes longer, simultaneously because powder is thinner, so be added to the water dissolving time, it is easy to assemble parcel and unite, It is allowed to dissolution time longer.And the pva powder after the technology of the present invention process, due to through the technology of the present invention method and hands Section is that the polyglycol ether of part has entered in pva powder granule, and polyglycol ether energy dissolution rapidly in water is molten Solve, make pva powder granule that corresponding gap and hole, these gaps formed due to polyglycol ether dissolution to occur And hole, can be that hydrone penetrates into rapidly inside pva powder granule, and it is poly-to make pva powder granule occur Structure set destroys and further fragmentation occurs, makes pva powder granule refine further, thus is greatly improved in water Dissolution velocity, the most therefore makes pva powder granule solve more thorough.Pva powder granule is greatly reduced in water Dissolution time also makes course of dissolution be simplified to need not be heated to more than 90 DEG C.
Detailed description of the invention
Make the most specifically to describe in detail to the present invention below in conjunction with specific embodiment, but the enforcement of the present invention and guarantor The scope of protecting is not limited to this.Following part is weight portion.
Embodiment 1
59 parts of polyvinyl alcohol (PVA-1799) powder (80 mesh)
Polyglycol ether (PEG-2000) 8 parts
Polyglycol ether (PEG-10000) 2 parts
Penetrating agent JFC 3 parts
Ethylene glycol 5 parts
Acetamide 3 parts
20 parts of water
1. standby by the metering of above-mentioned each component, polyglycol ether (PEG-2000), polyglycol ether (PEG-10000), infiltration Agent JFC, ethylene glycol and acetamide are dissolved in the water of 20 mass parts, standby;
2. the 80 mesh PVAC polyvinylalcohol-1799 measured are joined in homogenizer, start stirring, at a high speed under (1500 Rev/min) carry out high-speed stirred, because of the friction under high-speed stirred, material there will be intensification, until material polyvinyl alcohol is warming up to 80 After DEG C, adjust homogenizer to 300 revs/min, be initially added into step 1. in the component that is dissolved in the water;
3., after adding each component, continue to start at a high speed to 1500 revs/min, adjust after carrying out mixing 30 minutes under this mixing speed Rotating speed, to 300 revs/min, is cooled to room temperature discharging;
4. through 1.--the material that 3. step mixes, after being dried at 110 DEG C, dry run uses and is dried box dry Dry, after being dried after pulverizing and sieving a kind of pva powder soluble in water.
PVAC polyvinylalcohol-1799 powder particle 6g after above-mentioned technical finesse, in 100ml water at 60 DEG C 10 Minute can be completely dissolved.And undressed PVAC polyvinylalcohol-1799 powder particle must 30 minutes at 95 DEG C could be completely Dissolve.
Embodiment 2
73 parts of polyvinyl alcohol (PVA-0599) powder (40 mesh)
Polyglycol ether (PEG-4000) 3 parts
Penetrating agent JFC-T 1 part
Propandiol butyl ether 2 parts
Methanamide 1 part
20 parts of water
1. standby, polyglycol ether (PEG-4000), penetrating agent JFC-T, propandiol butyl ether and first by the metering of above-mentioned each component Amide is dissolved in the water of 20 mass parts, standby;
2. the 40 mesh PVAC polyvinylalcohol-0599 measured are joined in homogenizer, start stirring, at a high speed under (1500 Rev/min) carry out high-speed stirred, because of the friction under high-speed stirred, material there will be intensification, until material polyvinyl alcohol is warming up to 80 After more than DEG C, adjust homogenizer to 300 revs/min, be initially added into step 1. in the component that is dissolved in the water;
3., after adding each component, continue to start at a high speed to 1500 revs/min, adjust after carrying out mixing 30 minutes under this mixing speed Rotating speed, to 300 revs/min, is cooled to room temperature discharging;
4. through 1.--the material that 3. step mixes, after carrying out after drying at 100 DEG C, dry run uses Screw Extrusion Machine is dried, after being dried after pulverizing and sieving a kind of pva powder soluble in water.
PVAC polyvinylalcohol-0599 powder particle 10g after above-mentioned technical finesse, in 100ml water at 45 DEG C 10 Minute can be completely dissolved.And undressed PVAC polyvinylalcohol-0599 powder particle must 30 minutes at 90 DEG C could be completely Dissolve.
Embodiment 3
70 parts of polyvinyl alcohol (PVA-1788) powder (60 mesh)
Polyglycol ether (PEG-2000) 3 parts
Polyglycol ether (PEG-8000) 2 parts
Penetrating agent JFC-1 1 part
Ethylene glycol monomethyl ether 2 parts
Phosphoamide 2 parts
20 parts of water
1. standby, polyglycol ether (PEG-2000), polyglycol ether (PEG-8000), penetrating agent by the metering of above-mentioned each component JFC-1, ethylene glycol monomethyl ether and phosphoamide are dissolved in the water of 20 mass parts, standby;
2. the PVAC polyvinylalcohol-1788 measured is joined in homogenizer, start stirring, under high speed (1500 revs/min) Carrying out high-speed stirred, because of the friction under high-speed stirred, material there will be intensification, until after material polyvinyl alcohol is warming up to 80 DEG C, Adjust homogenizer to 300 revs/min, be initially added into step 1. in the component that is dissolved in the water;
3., after adding each component, continue to start at a high speed to 1500 revs/min, adjust after carrying out mixing 30 minutes under this mixing speed Rotating speed, to 300 revs/min, is cooled to room temperature discharging;
4. through 1.--the material that 3. step mixes, after carrying out after drying at 120 DEG C, dry run uses dry box Be dried, after being dried after pulverizing and sieving a kind of soluble in water in pva powder.
PVAC polyvinylalcohol-1788 powder particle 10g after above-mentioned technical finesse, in 100ml water at 40 DEG C 5 Minute can be completely dissolved.And undressed PVAC polyvinylalcohol-1788 powder particle must 30 minutes at 90 DEG C could be completely Dissolve.
Embodiment 4
66 parts of polyvinyl alcohol (PVA-2488) powder (100 mesh)
Polyglycol ether (PEG-4000) 5 parts
Polyglycol ether (PEG-10000) 3 parts
Polyglycol ether (PEG-20000) 1 part
Penetrating agent-AEP 1 part
Propylene glycol monomethyl ether 2 parts
Acetamide 2 parts
20 parts of water
1. standby, polyglycol ether (PEG-4000), polyglycol ether (PEG-10000), poly-second by the metering of above-mentioned each component Glycol ethers (PEG-20000), penetrating agent-AEP, propylene glycol monomethyl ether and acetamide are dissolved in the water of 20 mass parts, standby;
2. the 100 mesh PVAC polyvinylalcohol-2488 measured are joined in homogenizer, start stirring, at a high speed under (1500 Rev/min) carry out high-speed stirred, because of the friction under high-speed stirred, material there will be intensification, until material polyvinyl alcohol is warming up to 80 After DEG C, adjust homogenizer to 300 revs/min, be initially added into step 1. in the component that is dissolved in the water;
3., after adding each component, continue to start at a high speed to 1500 revs/min, adjust after carrying out mixing 30 minutes under this mixing speed Rotating speed, to 300 revs/min, is cooled to room temperature discharging;
4. through 1.--the material that 3. step mixes, after carrying out after drying at 115 DEG C, dry run uses dry box Be dried, after being dried after pulverizing and sieving a kind of soluble in water in pva powder.
PVAC polyvinylalcohol-2488 powder particle 5g after above-mentioned technical finesse, in 100ml water at 50 DEG C 5 points Clock can be completely dissolved.And undressed PVAC polyvinylalcohol-2488 powder particle must 30 minutes at 95 DEG C could be the most molten Solve
Embodiment 5
65 parts of polyvinyl alcohol (PVA-1788) powder (25 mesh)
Polyglycol ether (PEG-2000) 4 parts
Polyglycol ether (PEG-8000) 2 parts
Polyglycol ether (PEG-20000) 1 part
Penetrating agent JFC-E 2 parts
Ethylene glycol 5 parts
Methanamide 1 part
20 parts of water
1. standby, polyglycol ether (PEG-2000), polyglycol ether (PEG-20000), poly-second by the metering of above-mentioned each component Glycol ethers (PEG-20000), penetrating agent JFC-E, ethylene glycol and Methanamide are dissolved in the water of 20 mass parts, standby;
2. the PVAC polyvinylalcohol-1788 measured is joined in homogenizer, start stirring, under high speed (1500 revs/min) Carrying out high-speed stirred, because of the friction under high-speed stirred, material there will be intensification, until after material polyvinyl alcohol is warming up to 80 DEG C, Adjust homogenizer to 300 revs/min, be initially added into step 1. in the component that is dissolved in the water;
3., after adding each component, continue to start at a high speed to 1500 revs/min, adjust after carrying out mixing 30 minutes under this mixing speed Rotating speed, to 300 revs/min, is cooled to room temperature discharging;
4. through 1.--the material that 3. step mixes, after carrying out after drying at 105 DEG C, dry run uses Screw Extrusion Machine is dried, after being dried after pulverizing and sieving a kind of soluble in water in pva powder.
PVAC polyvinylalcohol-1788 powder particle 5g after above-mentioned technical finesse, in 100ml water at 40 DEG C 8 points Clock can be completely dissolved.And undressed PVAC polyvinylalcohol-1788 powder particle must 30 minutes at 90 DEG C could be the most molten Solve.
Above example is merely to illustrate technical scheme, is not intended to limit.Although with reference to preferred embodiment Being described in detail the present invention, it will be understood by those skilled in the art that still can be to the concrete reality of the present invention The mode of executing is modified or portion of techniques feature is carried out equivalent, without deviating from the spirit of technical solution of the present invention, its All should contain among the technical scheme scope of present invention request.

Claims (10)

1. a pva powder soluble in water, it is characterised in that the component of this pva powder and containing of each component Measure as follows:
Pva powder 59-73 wt%
Polyglycol ether 3-10 wt%
Surface wettability penetrating agent 1-3 wt%
Compatilizer 2-5 wt%
Viscosifier 1-3 wt%
Water 20 wt%.
A kind of pva powder soluble in water the most according to claim 1, it is characterised in that described polyvinyl alcohol powder End is the pva powder of complete alcoholysis or partial alcoholysis.
A kind of pva powder soluble in water the most according to claim 1, it is characterised in that described polyvinyl alcohol powder End is PVA-0599, PVA-1399, PVA-1599, PVA-1799, PVA-2099, PVA-2299, PVA-2499, PVA-0588, One in PVA-1788, PVA-2088, PVA-2288 and PVA-2488, fineness is 25-120 mesh.
A kind of pva powder soluble in water the most according to claim 1, it is characterised in that described polyglycol ether It is the polyglycol ether between 2000-20000 for molecular weight.
A kind of pva powder soluble in water the most according to claim 1, it is characterised in that described polyglycol ether For more than one in PEG-2000, PEG-4000, PEG-6000, PEG-8000, PEG-10000 and PEG-20000.
A kind of pva powder soluble in water the most according to claim 1, it is characterised in that described surface wettability oozes Agent refers to have the relatively strong moistening and nonionic surfactant of penetrating power or anionic surfactant thoroughly.
A kind of pva powder soluble in water the most according to claim 1, it is characterised in that described surface wettability oozes Agent is penetrating agent JFC, penetrating agent JFC-1, penetrant JFC-2, penetrating agent JFC-E, penetrating agent JFC-T, penetrating agent-OEP, oozes thoroughly One in agent-AEP and penetrating agent JFC-M thoroughly.
A kind of pva powder soluble in water the most according to claim 1, it is characterised in that described compatilizer is second Glycol methyl ether, ethylene glycol, butyl glycol ether, the one in propylene glycol monomethyl ether, propylene-glycol ethyl ether and propandiol butyl ether.
9. according to the pva powder a kind of soluble in water described in claim 1, it is characterised in that described viscosifier are One in phosphoamide, caprolactam, Methanamide and acetamide.
10. preparation pva powder a kind of soluble in water described in any one of claim 1-9, it is characterised in that step As follows:
1) as described in claim 1, each component content in pva powder measures each component, polyglycol ether, surface Moistening penetrating agent, compatilizer and viscosifier are soluble in water, obtain mixture, standby;
2) pva powder measured is joined in homogenizer, start stirring, under 1500 revs/min of high speeds, carry out height Speed stirring, because of the friction under high-speed stirred, material polyvinyl alcohol there will be intensification, until material pva powder is warming up to 80 After more than DEG C, the speed adjusting homogenizer is 300 revs/min, is initially added into step 1) gained mixture;
3), after adding, continue to start at a high speed to 1500 revs/min, after carrying out mixing 30 minutes under this mixing speed, adjust rotating speed extremely 300 revs/min, it is cooled to room temperature discharging;
4) material step 3) mixed, is dried at 100-120 DEG C, and dry run can be to be dried box-type drying, Can also be that screw extruder is dried, through pulverizing and sieving after being dried, obtain a kind of pva powder soluble in water.
CN201610277210.4A 2016-04-30 2016-04-30 A kind of pva powder soluble easily in water and preparation method thereof Active CN105838007B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109943260A (en) * 2019-04-10 2019-06-28 北京博润佳科技有限公司 A kind of glue is with exempting from heat modification pva powder

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103772862A (en) * 2014-01-08 2014-05-07 华南理工大学 Partial alcoholysis type polyvinyl alcohol powder easy to disperse in water and preparation method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103772862A (en) * 2014-01-08 2014-05-07 华南理工大学 Partial alcoholysis type polyvinyl alcohol powder easy to disperse in water and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109943260A (en) * 2019-04-10 2019-06-28 北京博润佳科技有限公司 A kind of glue is with exempting from heat modification pva powder

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polyvinyl alcohol powder