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A kind of polypropylene carbonate emulsion and its medical dressing and packaging material preparation method

A technology of polypropylene carbonate and dimethyl carbonate, which is applied in the fields of medical science, addition of water repellents, absorbent pads, etc., can solve the problems of many steps and high energy consumption

Active Publication Date: 2016-03-02
吉林金源北方科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the patented technology adopts the technology of thermal bonding of cotton pulp paper and PPC, not only the cotton pulp paper must be processed first, but also the PPC must be tape-cast, with many steps and high energy consumption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Dissolve 32 grams of PPC (number average molecular weight 110,000) in 70 mL of dimethyl carbonate solution, stir at 40oC, and rotate at 300-500 rpm, and add 6 grams of mixed emulsifier (2.2g Span 80, 3.8 g octadecyl trimethyl ammonium chloride) into an oil solution, dissolve 2.5 g of polyvinyl alcohol 1788 and 0.5 g of sodium carboxymethyl cellulose in 80 mL of water, add the aqueous solution to the above oil solution, and perform high-speed shearing The PPC emulsion was prepared by emulsifying in a cutter for 5 minutes at a rotation speed of 10000 rpm. The emulsion was centrifuged at 2500 rpm for 30 minutes without layering.

Embodiment 2

[0019] Dissolve 35 grams of PPC (number average molecular weight of 150,000) in 50 mL of dimethyl carbonate solution, stir at 50°C, and rotate at 300-500 rpm, and add 7.5 grams of mixed emulsifier (3.2g Tween 80, 4.3 g octadecyl trimethyl ammonium chloride), into an oil solution, dissolve 2 g of polyvinyl alcohol 1788 and 0.5 g of sodium carboxyethyl cellulose in 60 mL of water, add the aqueous solution to the oil solution, The PPC emulsion was prepared by emulsifying in a cutter for 10 minutes at a rotation speed of 10000 rpm. The emulsion was centrifuged at 2500 rpm for 30 minutes without layering.

Embodiment 3

[0021] Dissolve 45 grams of PPC (with a number average molecular weight of 80,000) in 60 mL of dimethyl carbonate solution, stir at 70°C, and rotate at 300-500 rpm, and add 9 grams of mixed emulsifier (4g Span 80, 5g) Tween 40), into an oil solution, dissolve 3.5 g of polyvinyl alcohol 1788 and 1.5 g of soluble starch in 70 mL of water, add the aqueous solution to the oil solution, emulsify in a high-speed shearing machine for 12 minutes, and rotate at 10000 rpm to prepare PPC emulsion. The emulsion was centrifuged at 2500 rpm for 30 minutes without layering.

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Abstract

The present invention relates to a high molecule weight poly(propylene carbonate) emulsion and a preparation method for medical dressings and various package materials of the poly(propylene carbonate) emulsion. According to the present invention, the stable water-in-oil poly(propylene carbonate) emulsion is prepared, wherein the poly(propylene carbonate) content in the emulsion is 15-35%, and a number average molecular weight of the poly(propylene carbonate) is more than 80,000; and the emulsion prepared by the preparation method can be placed in a sizing machine, and can be mixed with paper pulp during a modulation phase, such that synthesis paper having a waterproof function can be prepared under the premise of no papermaking process change, wherein the synthesis paper can be used as medical dressings and various package materials.

Description

Technical field [0001] The invention relates to a preparation method of a high molecular weight polypropylene carbonate emulsion, a medical dressing and various packaging materials. Background technique [0002] Polypropylene carbonate (PPC) is an aliphatic polyester formed by alternating copolymerization of carbon dioxide and propylene oxide. It has biodegradable properties and only produces carbon dioxide and water during incineration. It is an environmentally friendly polymer material. Chinese invention patent 01127540.5 discloses a method for preparing medical PPC. Chinese invention patent 03253806.5 discloses a method for preparing a medical dressing, using PPC as a barrier layer, using a sandwich structure to heat and compound PPC and cotton pulp paper to prepare a waterproof medical dressing, which has been mass-produced. This patented technology uses the heat-sealing technology of cotton pulp paper and PPC, not only the cotton pulp paper must be processed first, but the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L3/02C08L1/26C08J3/02D21H21/16A61L15/28A61L15/26A61L15/20A61L15/42
Inventor 冯超王绍伟
Owner 吉林金源北方科技发展有限公司