Polypropylene surface modified additive resin and preparation method thereof

A surface modification, polypropylene technology, used in the preparation of polypropylene plastic surface biocompatibility and hydrophilic modified resin, modified resin field, can solve the problem of coating peeling, poor coating adhesion, modification To avoid problems such as complex sexual process, achieve good adhesion and improve the effect of surface anticoagulation

Inactive Publication Date: 2009-12-02
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the biocompatibility modification of polypropylene, surface grafting or surface coating with biophilic coatings are more commonly used at present. The surface grafting of biophilic monomers must be completed through chemical reactions, and the modification process is relatively complicated. The raw materials and the by-products produced by the reaction must be removed through a more complicated process
However, due to the above reasons, the surface coating biophilic coating has extremely poor adhesion, and the coating is prone to peeling off.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Direct polycondensation method to synthesize polylactic acid: Add 100g of lactic acid, a small amount of tin powder and xylene into a 500mL flat-bottomed flask, heat it with magnetic stirring, after 3 hours of water separation, use molecular sieve to absorb water, continue the reaction for several hours, and distill out part of the solvent xylene Then, dissolve with acetone, filter out the tin powder, precipitate with a large amount of distilled water, wash to neutrality and vacuum dry for use.

[0023] The end-capping reaction of polylactic acid to prepare single-ended hydroxyl polylactic acid: add 100g of polylactic acid (M n =1800), 5mL end-capping agent n-butanol, 150mL xylene, appropriate amount of 2,6-di-tert-butyl-p-cresol, molecular sieve absorbs water, boiled and refluxed for 7h, dissolved in acetone, precipitated with a large amount of distilled water, washed to remove excess positive Butanol, dry for later use.

[0024] Synthesis of polypropylene / polylactic acid ...

Embodiment 2

[0027] According to the molar ratio of hydroxyl to carboxyl group of 4:1, double-end carboxyl polypropylene and double-end hydroxyl polydimethylsiloxane were dissolved in 50mL xylene solvent, added to a 100mL single-necked flask, and then added a small amount of catalyst 14 -Dimethylaminopyridine and 1.2 times the carboxyl group mole number of water-absorbing agent N,N'-dicyclohexylcarbimide, heated to reflux, and produced by the removal of N,N'-dicyclohexylcarbimide during the reaction The small amount of water. The reaction is over after a certain period of time, cool to 100°C, pour it into three times the volume of xylene to precipitate, filter and re-precipitate twice, extract with acetone in a Soxhlet extractor for 36 hours, and vacuum dry to obtain a pure Polypropylene / polydimethylsiloxane block copolymer.

[0028] The synthetic polypropylene block copolymer is blended with polypropylene resin to prepare the modified material. The hemolysis rate of the modified material is r...

Embodiment 3

[0030] Add 10g polypropylene, 2.0g maleic anhydride and 100ml xylene into a 250ml four-necked flask, and pass nitrogen protection. After the oil bath is heated to the specified temperature, add 0.1g benzoyl peroxide in batches every 20 minutes and stir to react. It terminates after 5h. After cooling to room temperature, about three times the volume of ethanol was poured into the product to obtain a white precipitate. Filter with Buchner funnel and soak in acetone overnight. Then dissolve with xylene and perform secondary precipitation, repeat precipitation 2 to 3 times to wash away the residual maleic anhydride monomer. The product is dried in an oven at 60°C to a constant weight to obtain maleic anhydride grafted polypropylene.

[0031] Dissolve maleic anhydride grafted polypropylene and single-ended hydroxy polyethylene glycol in 100 mL of xylene solvent according to the molar ratio of maleic anhydride to hydroxyl group of 1:2, add a small amount of p-toluenesulfonic acid, pass ...

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PUM

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Abstract

The invention relates to a polypropylene plastic surface modified additive resin with biocompatibility and hydrophily and a preparation method thereof. The surface modified additive resin is a block or graft copolymer consisting of a polypropylene segmer with matrix affinity and a segmer with water affinity and organism affinity; the molecular weight of the the polypropylene segmer with the matrix affinity and the segmer with the water affinity and the organism affinity are 100 to 20,000 respectively; the segmer with the water affinity and the organism affinity is any one of single-ended hydroxyl ploy methyl methacylate, single-ended polyethylene glycol, polydimethylsiloxane, terminal hydroxyl aliphatic polyester, single-ended hydroxyl polylactic acid and single-ended hydroxyl polyhydroxyalkanoates. The modified additive can be directly blended with the polypropylene and absorbed on the surface of the polypropylene during the molding, has excellent adhesion with the polypropylene and can improve surface anticoagulation property and other biocompatibility of the polypropylene.

Description

Technical field [0001] The invention relates to a polypropylene resin surface modification additive, in particular to a modified additive resin with biocompatibility and hydrophilicity on the surface of polypropylene plastic. [0002] The invention also relates to a preparation method of the biocompatible and hydrophilic modified additive resin on the surface of the polypropylene plastic. Background technique [0003] Polypropylene plastics are widely used in automobiles, home appliances, daily necessities, packaging materials and medical materials because of their advantages such as easy molding, small specific gravity, good mechanical properties, reusability, and non-toxicity. However, polypropylene plastic has high crystallinity, low polarity, and poor adhesion of the coating to its surface, which has long caused problems such as difficulty in coating and printing. Due to the high non-polarity and high crystallinity of its molecular structure, the compatibility with organisms ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C08L23/12C08L53/00C08L51/08
Inventor 陈汉佳李可峰许曼
Owner SHANTOU UNIV
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