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Polyhydroxyalkanoates-containing aqueous emulsion, preparation method and application thereof

A technology of polyhydroxyalkanoate and hydroxybutyrate, applied in the field of water-based adhesives, can solve the problems of difficult recycling and processing of chloroprene latex products, skin allergy-contact rubella, and unfavorable medical treatment, etc. Environmental compatibility, no catalyst residue, combined toughness and elasticity

Inactive Publication Date: 2009-09-23
TIANJIN GREENBIO MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the widely used water latex is mainly natural rubber and synthetic rubber. Due to the presence of casein in latex, natural rubber and its products are likely to cause skin allergies - contact rubella, and produce unpleasant smell, so it is not conducive to Wide application in medicine
Synthetic rubber mainly includes chloroprene, chlorobenzene, nitrile, butyl, polyurethane, acrylate and their blends and copolymers, etc., because these latex products will not cause skin allergies due to the presence of protein, and are oil and chemical resistant Excellent product performance, resistance to oxygen and ozonation, low permeability, hang penetration performance is better than natural latex products, and the feel is the same as natural latex products, among which neoprene and nitrile latex and products have been industrialized, but neoprene latex products Recycling is difficult, and the chlorine element in glove components is not friendly to the environment; the pungent smell of nitrile latex and its products has affected their promotion and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] First take 5 grams of M w =400,000 P(3HB-co-4HB) (4HB content is 40%, Tianjin Guoyun Company) was dissolved in 60ml of ethyl acetate, and it was fully dissolved by electromagnetic stirring, and set aside. And a certain amount of anionic and nonionic mixed emulsifier (optimal ratio is 1: 2, anionic is 0.3 gram of sodium dodecylbenzenesulfonate, and nonionic emulsifier is 0.6 gram of fatty alcohol polyoxyethylene ether), And 8 grams of the prepared CMCAB aqueous solution were added to 12 grams of water together, and stirred with electromagnetic to make it fully mixed. Then, pour the P(3HB-co-4HB) solution into the above aqueous solution, and use a homogeneous mixer (SJ200-S, Shanghai Specimen Model Factory) for high-speed stirring, the stirring speed is controlled at about 15,000 revolutions per minute, and homogenized three times 5 minutes each time.

[0031] The preparation method of carboxymethylcellulose (CMCAB) aqueous solution is as follows: take 5g carboxymethylc...

Embodiment 2

[0033] Add 20g distilled water and 0.1g emulsifier No. 1 (Cognis, fatty alcohol polyoxyethylene ether mixture) to the beaker respectively, stir it with electromagnetic to make it mix evenly; add 4g M w= 490,000 P(3HB-co-4HB) (4HB content 20%, Tianjin Guoyun Company), 60mL ethyl acetate and 0.1g sodium dodecylbenzenesulfonate, electromagnetic stirring to fully dissolve and mix. Slowly add the organic solution into the aqueous solution under stirring by a homogeneous mixer (SJ200-S, Shanghai Specimen Model Factory) at a speed of 1500r / min or more, stir for about 5min / time, 5times, until the emulsion is uniformly distributed and becomes milky white, then let it stand Without separation, the reaction was carried out in a water bath at 40°C.

Embodiment 3

[0035] First take 5 grams of M w The copolymer P (3HB-co-3HHx) (HHx content of 400,000 3-hydroxybutyric acid and 3-hydroxycaproic acid is 12%, Tsinghua University Microbiological Laboratory) is dissolved in 60ml dichloromethane, and makes with electromagnetic stirring It is fully dissolved and set aside. And a certain amount of anionic and nonionic mixed emulsifier (optimal ratio is 1: 2, anionic is 0.3 gram of sodium dodecylbenzenesulfonate, and nonionic emulsifier is 0.6 gram of fatty alcohol polyoxyethylene ether), And 8 grams of the prepared CMCAB aqueous solution were added to 12 grams of water together, and stirred with electromagnetic to make it fully mixed. Then, pour the P(3HB-co-3HHx) solution into the above aqueous solution, and use a homogeneous mixer (SJ200-S, Shanghai Specimen Model Factory) for high-speed stirring, the stirring speed is controlled at about 15,000 rpm, and homogenized three times About 5 minutes each time.

[0036] The preparation method of ca...

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Abstract

The invention belongs to the field of water-based adhesives, and particularly discloses a polyhydroxyalkanoates-containing aqueous emulsion which contains polyhydroxyalkanoates and emulsifier and can also contain dispersant. The polyhydroxyalkanoates is dissolved in an appropriate amount of organic solvent and then added with water, the emulsifier and the dispersant; the obtained product is stirred and dispersed by use of a homogenizer so as to prepare the aqueous emulsion; and the aqueous emulsion is subjected to film formation under a certain condition. Or a product of fermenting the polyhydroxyalkanoates can be directly utilized as follows: after filter residue is removed, the product is added with a certain amount of the emulsifier and the dispersant and stirred by use of the homogenizer so as to obtain the aqueous emulsion. Compared with solvent-type emulsions, the prepared aqueous emulsion releases no solvent, has the characteristics of environment-friendly property, good stability, excellent film-forming property, degradability, biocompatibility and optical activity, and can meet the needs of food packaging, medical emulsion products and other application.

Description

technical field [0001] The invention belongs to the field of water-based adhesives. More specifically, the invention discloses a water latex containing biological polyester, its preparation method and application. Background technique [0002] There are many kinds of water latex products, which have been widely used in people's daily life, medical care, weather detection and electronic industry. As high value-added products, water-emulsion products mainly include surgical gloves, oxygen bags, catheters, tourniquets, condoms, pillows with special functions, etc.; at the same time, water-emulsion dipping products are widely used in industrial gloves, household Gloves, insulating gloves, balloons, etc. are affordable and popular commercial products, so it seems that the application of water latex is everywhere. [0003] At present, the widely used water latex is mainly natural rubber and synthetic rubber. Due to the presence of casein in latex, natural rubber and its products ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08J3/07A61L17/00A61L31/06A61L29/06A61L33/06A41D19/00
Inventor 许开天陈国强吕渭川王晓娟潘觉宇陈智飞朱文甫
Owner TIANJIN GREENBIO MATERIAL CO LTD
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