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Polyvinyl alcohol powder soluble in water and preparation method thereof

A technology of polyvinyl alcohol powder and polyethylene glycol ether, which is applied in the field of polyvinyl alcohol powder and its preparation, can solve the problems of affecting dispersion and dissolution, powder aggregation and wrapping, agglomeration and the like, and achieves the effect of improving the dissolution speed.

Inactive Publication Date: 2016-08-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the dissolution rate of polyvinyl alcohol in water, many polyvinyl alcohol products are directly processed into 25-120 mesh powder, which shortens the dissolution time of polyvinyl alcohol in water and improves the efficiency of preparing aqueous solutions; however, due to the partial alcoholysis of PVA It is very easy to swell and partially dissolve in cold water, so it is easy to cause the powder added to the water to aggregate and wrap each other, which will affect its dispersion and dissolution in water.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Polyvinyl alcohol (PVA-1799) powder (80 mesh) 59 parts

[0036] Polyethylene glycol ether (PEG-2000) 8 parts

[0037] Polyethylene glycol ether (PEG-10000) 2 parts

[0038] Penetrant JFC 3 parts

[0039] Ethylene glycol ether 5 parts

[0040] Acetamide 3 parts

[0041] 20 parts of water

[0042] ①Measure according to the above components for later use, dissolve polyethylene glycol ether (PEG-2000), polyethylene glycol ether (PEG-10000), penetrant JFC, ethylene glycol ethyl ether and acetamide in 20 parts by mass of water ,spare;

[0043] ② Add the measured 80-mesh polyvinyl alcohol PVA-1799 into the high-speed mixer, start stirring, and carry out high-speed stirring at high speed (1500 rpm). Due to the friction under high-speed stirring, the material will heat up until the material polyethylene After the alcohol is heated to 80°C, adjust the high-speed mixer to 300 rpm, and start adding the components dissolved in water in step ①;

[0044] ③ After adding each compo...

Embodiment 2

[0048] Polyvinyl alcohol (PVA-0599) powder (40 mesh) 73 parts

[0049] Polyethylene glycol ether (PEG-4000) 3 parts

[0050] Penetrant JFC-T 1 part

[0051] 2 parts propylene glycol butyl ether

[0052] Formamide 1 part

[0053] 20 parts of water

[0054] ①Measure according to the above components for use, dissolve polyethylene glycol ether (PEG-4000), penetrant JFC-T, propylene glycol butyl ether and formamide in 20 parts by mass of water, and set aside;

[0055] ② Add the measured 40-mesh polyvinyl alcohol PVA-0599 into the high-speed mixer, start stirring, and carry out high-speed stirring at high speed (1500 rpm). Due to the friction under high-speed stirring, the material will heat up until the material polyethylene After the alcohol is heated to above 80°C, adjust the high-speed mixer to 300 rpm, and start adding the components dissolved in water in step ①;

[0056] ③ After adding each component, continue to start the high speed to 1500 rpm, mix at this stirring spe...

Embodiment 3

[0060] Polyvinyl alcohol (PVA-1788) powder (60 mesh) 70 parts

[0061] Polyethylene glycol ether (PEG-2000) 3 parts

[0062] Polyethylene glycol ether (PEG-8000) 2 parts

[0063] Penetrant JFC-1 1 part

[0064] 2 parts ethylene glycol methyl ether

[0065] Carboxamide 2 parts

[0066] 20 parts of water

[0067] ①Measure the above-mentioned components for later use, dissolve polyethylene glycol ether (PEG-2000), polyethylene glycol ether (PEG-8000), penetrant JFC-1, ethylene glycol methyl ether and carbonamide in 20 mass part of water, set aside;

[0068] ② Add the measured polyvinyl alcohol PVA-1788 into the high-speed mixer, start stirring, and carry out high-speed stirring at high speed (1500 rpm). Due to the friction under high-speed stirring, the material will heat up until the material polyvinyl alcohol heats up After reaching 80°C, adjust the high-speed mixer to 300 rpm, and start adding the components dissolved in water in step ①;

[0069] ③ After adding each com...

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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

technical field [0001] The invention relates to the modification field of polyvinyl alcohol, in particular to a water-soluble polyvinyl alcohol powder and a preparation method thereof. Background technique [0002] As a water-soluble polymer, polyvinyl alcohol (PVA) is widely used in the preparation of water-soluble adhesives, coatings and other materials. When polyvinyl alcohol (PVA) is formulated into an aqueous solution, the common method is to first disperse in cold water, and then heat to dissolve under stirring. Generally, it needs to be heated to 90°C-95°C. After the dissolution is completed, then keep at this temperature About 30 minutes, and maintain stirring to obtain fully dissolved and uniform polyvinyl alcohol aqueous solution. In order to improve the dissolution rate of polyvinyl alcohol in water, many polyvinyl alcohol products are directly processed into 25-120 mesh powder, which shortens the dissolution time of polyvinyl alcohol in water and improves the ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L71/08C08K5/06C08K5/20
CPCC08L29/04C08L2205/025C08L2205/03C08L2205/035C08L71/00C08K5/06C08K5/20
Inventor 崔跃飞周向阳
Owner SOUTH CHINA UNIV OF TECH
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