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Modified nature latex, preparation method and use thereof

A natural latex and modification technology, applied in the field of preparation of modified natural latex, can solve the problems of high cost, reduced mechanical properties of latex products, complicated processes, etc. good biocompatibility

Inactive Publication Date: 2014-06-04
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, more and more attention has been paid to the research on solving and improving latex protein allergy. The main solutions reported at present include deproteinization, enzymatic decomposition, surface chlorination, etc., but these methods have problems such as high cost and complicated process. Reduction will lead to a great reduction in the mechanical properties of latex products

Method used

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  • Modified nature latex, preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Preparation of sericin aqueous solution:

[0052] Cut commercially available cocoons into about 0.5cm 3 After the block, weigh 50 parts and wash with shaking water, then rinse with deionized water;

[0053]After washing, add 300 parts of deionized water, put it into a flask for a 100°C water bath, and keep boiling for 3 hours after boiling, then stop heating;

[0054] After hot suction filtration, the resulting solution was freeze-dried at -30°C for 24 hours to obtain 13.5 parts of sericin powder;

[0055] Add 100 parts of deionized water to 13.5 parts of sericin powder, stir evenly for 10 minutes (stirring speed is 150r / min) to fully dissolve, and obtain a sericin aqueous solution with a concentration of 11.9%, and set aside;

[0056] (2) Preparation of sericin grafted water-based polyurethane emulsion:

[0057] In the four-necked flask equipped with agitator, thermometer, reflux condenser and dropping funnel, drop into oligomer polyol polypropylene glycol 2000 ...

Embodiment 2

[0065] (1) Preparation of sericin aqueous solution:

[0066] Cut commercially available cocoons into about 1.0cm 3 After the block, weigh 50 parts and wash with shaking water, then rinse with deionized water;

[0067] After washing, add 400 parts of deionized water, put it into a flask for a 105°C water bath, and keep boiling for 4 hours after boiling, then stop heating;

[0068] After hot suction filtration, the resulting solution was freeze-dried at -40°C for 18 hours to obtain 14.3 parts of sericin powder;

[0069] Add 100 parts of deionized water to 14.3 parts of sericin powder, stir evenly for 10 minutes (stirring speed is 200r / min) to fully dissolve, and obtain a sericin aqueous solution with a concentration of 12.5%, and set aside;

[0070] (2) Preparation of sericin grafted water-based polyurethane emulsion:

[0071] In the four-necked flask equipped with stirrer, thermometer, reflux condenser and dropping funnel, drop into oligomer polyol polytetrahydrofuran ether ...

Embodiment 3

[0078] (1) Preparation of sericin aqueous solution:

[0079] Cut commercially available cocoons into about 1.5cm 3 After the block, weigh 70 parts and wash with shaking water, then rinse with deionized water;

[0080] After washing, add 500 parts of deionized water, put it into a flask for a 110°C water bath, and stop heating after boiling for 3.5 hours;

[0081] After hot suction filtration, the resulting solution was freeze-dried at -50°C for 12 hours to obtain 20.9 parts of sericin powder;

[0082] Add 100 parts of deionized water to 20.9 parts of sericin powder, stir evenly for 10 minutes (stirring speed is 250r / min) to fully dissolve, and obtain a sericin aqueous solution with a concentration of 17.3%, and set aside;

[0083] (2) Preparation of sericin grafted water-based polyurethane emulsion:

[0084] In a four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a dropping funnel, drop into 35.07 parts by weight of oligomer polyol polyoxypropy...

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Abstract

The invention belongs to the technical field of rubber chemical modification, and relates to a preparation method and a use of a modified nature latex. The modified nature latex is prepared from the following components by weight: 100 parts of nature latex, and 10-30 parts of sericin grafted aqueous polyurethane emulsion. According to the present invention, the modified rubber has advantages of surface functionalization, good biocompatibility and the like; the mechanical property and the allergy of the nature latex gloves are improved; and the traditional method that the protein removing method is adopted to solve the allergy of the latex product is changed, the allergy problem is solved without reduction of the protein content, and the physical and mechanical properties of the latex product are ensured.

Description

technical field [0001] The invention belongs to the technical field of rubber chemical modification, and relates to a preparation method and application of modified natural latex. Background technique [0002] Sericin is a natural polymer globular protein composed of 18 kinds of amino acids such as serine and aspartic acid. Because amino acids contain strong polar side groups such as hydroxyl, amino and carboxyl groups, sericin is endowed with excellent hydrophilicity. and chemical activity, as well as special properties such as skin moisturizing, anti-oxidation and biocompatibility. Sericin can be grafted and blended with other polymers to obtain materials with excellent properties. In recent years, more and more attention has been paid to the research on sericin, and sericin and its modified products are widely used in cosmetics, food, textiles and polymer products. [0003] Water-based polyurethane is an environmentally friendly material that is non-flammable, non-toxic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/02C08L75/04C08L75/08C08G18/66C08G18/65C08G18/64C08G18/48
Inventor 宋玲
Owner HEFEI GENIUS NEW MATERIALS
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