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Polyvinyl formal sponge material with uniform abscesses and rapid imbibition and preparation method thereof

A polyvinyl formal and polyvinyl alcohol technology, which is applied in the field of polyvinyl formal sponge and its preparation, can solve the problems of yellowing, low product yield, mildew and the like, and achieves improved water retention rate and stable production process , the effect of increasing the water absorption rate

Active Publication Date: 2012-11-07
克林纳奇(荆州)高分子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the low product yield and quality problems such as mildew and yellowing caused by traditional production methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]Stir 2 parts of polyvinyl alcohol in 20 parts of water at a temperature of 90°C to form a solution, add 2 parts of pore-forming agent and 0.01 part of emulsifier to the solution during the stirring process, and fully emulsify the pore-forming agent to form a dispersion After the uniform continuous liquid phase, add 3 parts of formaldehyde solution, and then add 2 parts of 50% sulfuric acid solution, mix well and pour it into the mold, react at 75°C for 1 hour, the continuous liquid phase system will transform and form bubbles After the hole is heated to 90°C for 4 hours of curing, the cured product is cooled and removed from the mold, the waste liquid is recycled, and the product is rolled and washed; after cleaning, the product is cut and cut under different environmental conditions according to the application requirements. Sterilize and pack.

Embodiment 2

[0029] Stir 5 parts of polyvinyl alcohol in 80 parts of water at a temperature of 90°C to form a solution, add 0.2 parts of pore-forming agent and 0.01 part of emulsifier to the solution during stirring, and fully emulsify the pore-forming agent to form a dispersion After the uniform continuous liquid phase, add 5 parts of formaldehyde solution, then add 10 parts of 50% sulfuric acid solution or 10 parts of recovered waste liquid, and 4 parts of cross-linking agent for mixing, and pour it into the mold for cross-linking after 10 minutes After reacting for 0.5 hours, after the continuous liquid phase system transforms to form cells, heat and mature at 70°C for 8 hours, cool the matured product and pour it out of the mold, recover the waste liquid, and perform preliminary cleaning and deep cleaning on the product Cutting is made into polyvinyl formal sponge material again, and is made into polyvinyl formal sponge material.

Embodiment 3

[0031] First, fully stir and disperse 7 parts of polyvinyl alcohol in 100 parts of water at a temperature of 95°C; add 4 parts of pore-forming agent to fully disperse and dissolve together under stirring conditions, or add 4 parts of pore-forming agent to stir and disperse after cooling down; add in sequence 9 parts of cross-linking agent, 15 parts of catalyst, or sequentially add 15 parts of catalyst, 9 parts of cross-linking agent, or sequentially add 20 parts of recovered waste liquid, 10 parts of catalyst, 10 parts of cross-linking agent, or sequentially add Add 20 parts of recovered waste liquid, 9 parts of cross-linking agent, and 10 parts of catalyst, stir for 15 minutes and pour into the mold. After 1 hour of cross-linking reaction in the mold, the continuous liquid phase system changes to form bubbles. After the hole, continue to heat and cross-link at 76°C for 12 hours; remove the cured product from the mold and recycle the waste liquid generated; clean the product; c...

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Abstract

The invention discloses a polyvinyl formal sponge material with uniform abscesses and rapid imbibition and a preparation method thereof. The material comprises polyvinyl alcohol, a cross-linking agent, a catalyst and a pore-forming agent, wherein the cross-linking agent is formaldehyde or paraformaldehyde or formaldehyde solution. The preparation method comprises the following steps of: stirring 2-9 parts of polyvinyl alcohol in 100-200 parts of water of which the temperature is 60-98 DEG C to obtain solution, and adding 0.05-8 parts of pore-forming agent to the solution; fully emulsifying the pore-forming agent to form evenly dispersed continuous solution phase; then adding 1-26 parts of catalyst and 1-15 parts of cross-linking agent or 5-50 parts of recovered liquid waste, 1-8 parts of catalyst and 1-15 parts of cross-linking agent, and mixing; pouring the mixture into a mould after 1-60 min for cross-linking reaction for 0.1-2 hours to form the abscesses under the action of the pore-forming agent; and continuing to heat and cure for 2-18 hours to prepare the polyvinyl formal sponge material. The invention has the advantages of good hydrophily, high compression strength, high dry wetting rate, high imbibition ratio and the like.

Description

technical field [0001] The invention relates to a polyvinyl formal sponge used in the fields of rapid liquid absorption, cleaning, and filtration, and in particular relates to a sponge with good compatibility, good affinity, high product opening rate, fast liquid absorption rate, and the like in the medical field. A rapid local hemostasis with a large liquid absorption rate, a medical carrier, a polyvinyl formal sponge for cold compress and hot compress, and a preparation method thereof. Background technique [0002] Polyvinyl alcohol (hereinafter referred to as PVA) acetal superabsorbent material has excellent water and oil absorption properties, and has been widely used in the fields of electronics industry, daily cleaning, medical and health care, kitchen and bathroom, building materials and so on. With the rapid economic development in recent years and people's continuous pursuit of a comfortable and healthy life, industrial cleaning and filtration supplies, household cl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/14C08J9/00A61L15/24A61K47/32
Inventor 谭明宁
Owner 克林纳奇(荆州)高分子科技有限公司
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