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Polyurethane shape memory high-molecular material and synthetic process thereof

A technology of polymer materials and synthesis processes, applied in textiles and papermaking, fiber processing, fibers repelling liquids, etc. Use value and other issues to achieve good shape memory effect, good waterproof effect, improve adaptability and comfort

Inactive Publication Date: 2018-05-22
HEILONGJIANG XINDA ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention overcomes the unsatisfactory shape memory effect existing in the prior art, the unsatisfactory waterproof, air-permeable and moisture-permeable effects of the product, and the discoloration and low use value of the fabric after finishing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The raw material that needs to be self-made is polyether polyol. The polyol initiator is glycerin and trimethylolpropane, the ratio is 1:1; the ratio of ethylene oxide and propylene oxide is 1:1. Hydroxyl value: 50-65, mgKOH / g functional group number: 3, acid value: 0.1-0.3mgKOH / g, moisture: 0.02-0.06%, appearance: light yellow, water solubility: soluble in water, pH value 5-5.5.

[0022] A kind of synthetic technique of polyurethane shape memory polymer material, comprises following steps successively,

[0023] (1) Vacuum dehydration of raw materials: N,N-dimethylformamide and 1,4-butanediol are dried, and polyether polyol is vacuum dehydrated at 100°C for 1.5h;

[0024] (2) Prepolymerization reaction: N 2 Add 30g of 2,4-toluene diisocyanate and 35ml of DMF under protected conditions, add 150g of measured polyether polyol dropwise, and stir and react at 80°C for 1.5h to obtain a prepolymer;

[0025] (3) Chain extension reaction: Add 1g of 1,4-BDO and 50g of dimethylo...

Embodiment 2

[0028] The polyol starter is glycerin and trimethylolpropane in a ratio of 1:4; the ratio of ethylene oxide and propylene oxide is 1:5. The reaction is the same as above to prepare polyether polyol.

[0029] A kind of synthetic technique of polyurethane shape memory polymer material, comprises following steps successively,

[0030] (1) Vacuum dehydration of raw materials: N, N-dimethylformamide and 1,4-butanediol are dried, and polyether polyols are vacuum dehydrated at 130°C for 3 hours;

[0031] (2) Prepolymerization reaction: N 2 Add 20g of 2,4-toluene diisocyanate and 20ml of DMF under the condition of protection, add 100g of measured polyether polyol dropwise, and stir and react at 65°C for 1.5h to obtain a prepolymer;

[0032] (3) Chain extension reaction: Add 5g of 1,4-BDO and 20g of dimethylol propionic acid into the reactor for chain extension reaction for 3 hours to obtain the extended product;

[0033] (4) Neutralization reaction: use 10-40g of triethylamine (TEA...

Embodiment 3

[0035] The polyol starter is glycerin and trimethylolpropane in a ratio of 1:2; the ratio of ethylene oxide and propylene oxide is 1:3. The reaction is the same as above to prepare polyether polyol.

[0036] A kind of synthetic technique of polyurethane shape memory polymer material, comprises following steps successively,

[0037](1) Vacuum dehydration of raw materials: N,N-dimethylformamide and 1,4-butanediol are dried, and polyether polyol is vacuum dehydrated at 120°C for 2 hours;

[0038] (2) Prepolymerization reaction: N 2 Add 30g of 2,4-toluene diisocyanate and 25ml of DMF under the condition of protection, add 120g of measured polyether polyol dropwise, and stir and react at 70°C for 2h to obtain a prepolymer;

[0039] (3) Chain extension reaction: Add 3g of 1,4-BDO and 35g of dimethylolpropionic acid into the reactor for chain extension reaction for 2 hours to obtain the extended product;

[0040] (4) Neutralization reaction: Use 10-40g of triethylamine (TEA) to co...

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Abstract

The invention relates to the preparation technical field of a temperature-controlled shape memory polymer, and in particular, relates to a polyurethane shape memory high-molecular material and a synthetic process thereof. The problems in the prior art that shape memory effect is not ideal, the waterproof, gas permeable and moisture permeable effects of a product are not ideal and a fabric after finishing has a color change phenomenon and has small practical value are overcome. The technical scheme comprises that the synthetic process includes the following steps successively: (1) vacuum dehydration of raw materials; (2) prepolymerization: adding 2,4-toluene diisocyanate and DMF under a condition of N2 protection, and dropwise adding metered polyol to obtain a prepolymer; (3) chain expansion reaction: carrying out chain expansion reaction of 1,4-BDO and dimethylolpropionic acid (DMPA); and (4) neutralization reaction: completely neutralizing carboxyl of DNPA with triethylamine (TEA), adding 300-1000 ml of water at the same time, and making the concentration of the final solution be 15-25%.

Description

technical field [0001] The invention relates to the technical field of preparation of temperature-controlled shape-memory polymers, in particular to a polyurethane shape-memory polymer material and a synthesis process thereof. Background technique [0002] Shape memory polymer or shape memory polymer (SMP), as a functional polymer material, is a new branch of research, development and application of polymer materials. Since the discovery of the shape memory function of Ni-Ti alloy in the 1960s, shape memory materials have attracted worldwide attention for their special properties. In 1981, Ota.SL1 and others made cross-linked polyethylene with special heat recovery shape memory effect through radiation method, becoming the first shape memory polymer material in the world. Compared with the shape memory alloy SMA, SMP has many advantages such as large deformation, easy shaping, easy adjustment of shape memory temperature, good electrical insulation and heat preservation effe...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08G18/10C08G65/28D06M15/568
CPCC08G18/0823C08G18/10C08G18/4837C08G18/7614C08G65/2609C08G2280/00D06M15/568D06M2200/12C08G18/3206C08G18/348
Inventor 马海清崔成杰谢众
Owner HEILONGJIANG XINDA ENTERPRISE GRP
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