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A kind of long-chain alkane polyurethane and its preparation method and application

A long-chain alkane and polyurethane technology, applied in the field of polyurethane materials, can solve the problems of limiting the application of polyurethane materials, lack of new polyurethane materials, molecular chain breakage, etc., and achieve the effect of excellent hydrolytic stability and hydrophobicity

Active Publication Date: 2020-03-10
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The application of polyurethane in the field of medical materials has been studied relatively maturely, but when used in biomedical materials, the existing polyester polyol type polyurethane and polyether polyol type polyurethane , the molecular chain will be broken, which greatly limits the application of polyurethane materials in medical polymer materials
Therefore, synthesizing a novel polyurethane material with excellent hydrolytic stability and hydrophobicity is currently missing.

Method used

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  • A kind of long-chain alkane polyurethane and its preparation method and application
  • A kind of long-chain alkane polyurethane and its preparation method and application
  • A kind of long-chain alkane polyurethane and its preparation method and application

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preparation example Construction

[0057] As previously mentioned, the present invention provides a kind of preparation method of long-chain alkane polyurethane, comprising:

[0058] Using unsaturated diols and diisocyanates as raw materials to carry out addition and chain extension reactions to synthesize polyolefin polyurethanes; then carry out hydrogenation reactions on them to obtain the long-chain alkane polyurethanes; wherein, the unsaturated dihydric Alcohols include hydroxyl-terminated polyolefin diols. Wherein, the degree of hydrogenation of the carbon-carbon double bond in the olefin in the unsaturated dihydric alcohol is greater than or equal to 99 mol%; preferably, greater than or equal to 99.5 mol%.

[0059] In a preferred embodiment of the present invention, the preparation method of described long-chain alkane polyurethane specifically comprises:

[0060] (a) Take a certain amount of hydroxyl-terminated polyolefin diol and catalyst and add them to the solvent for thorough mixing. After fully mix...

Embodiment 1

[0114] With double-terminated hydroxyl polybutadiene (R = 1.7, M n(HTPB) =3000g / mol) and diphenylmethane diisocyanate (MDI) are the synthesis of the long-chain alkane polyurethane of raw material

[0115] 5g dehydrated double-terminated polybutadiene (R=1.7, M n(HTPB) =3000g / mol) into a flask with a stirring magnet and a condenser tube, add 40mL of anhydrous toluene, 2 drops of dibutyltin dilaurate and 0.4mLN, N-dimethylformamide, set R=1.7 (isocyanate 0.7083g diphenylmethane diisocyanate corresponding to the ratio of alcoholic hydroxyl group to alcoholic hydroxyl group) was added to the constant pressure funnel, and 40mL of anhydrous toluene was added, microwave or oil bath was heated to 70°C, and diphenylmethane was added dropwise within 3h Toluene solution of diisocyanate, then continue to react at 70°C for 6h, then add 0.15g of chain extender 1,4-butanediol (BDO), and continue to react at this temperature for 5h, the above operations are all under the protection of nitrog...

Embodiment 2

[0119] With double-terminated hydroxyl polybutadiene-acrylonitrile copolymer (R = 1.8, M n =2000g / mol) and diphenylmethane diisocyanate (MDI) are the synthesis of the long-chain alkane polyurethane of raw material

[0120] 5g double-terminated hydroxyl polybutadiene-acrylonitrile copolymer (R=1.8, M n =2000g / mol) into a flask with a stirring magnet and a condenser tube, add 40mL of anhydrous toluene, 2 drops of dibutyltin dilaurate and 0.4mLN, N-dimethylformamide, make R=1.8 (isocyanate 1.126g of diphenylmethane diisocyanate corresponding to the ratio of alcoholic hydroxyl group to alcoholic hydroxyl group) was added to the constant pressure funnel, and 40mL of anhydrous toluene was added, microwave or oil bath was heated to 70°C, and the diphenylmethyl diisocyanate was added dropwise within 3h The diisocyanate toluene solution was reacted at 70°C for 3 hours, and then 0.25 g of chain extender 1,4-butanediol (BDO) was added, and the reaction was continued for 5 hours at this ...

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Abstract

The invention discloses long-chain alkane polyurethane and a preparation method and application thereof. The structure of the long-chain alkane polyurethane comprises the following repetitive units: afirst repetitive unit from diisocyanate, a second repetitive unit from a chain extender and a third repetitive unit from a hydrogenated product of unsaturated dihydric alcohol, wherein the unsaturated dihydric alcohol comprises hydroxyl-terminated polyolefin type dihydric alcohol; and the hydrogenation degree of carbon-carbon double bonds in olefin in the unsaturated dihydric alcohol is greater than or equal to 99 mol% (preferably greater than or equal to 99.5 mol%). By the preparation method, problems of hydroxyl dropping of a polyurethane product, severe degradation of carbamate, residual precious metal and the like can be reduced effectively. The preparation method has losts of advantages of short reaction period, low environmental pollution, high yield and the like, and is particularly suitable for industrial production. In addition, the long-chain alkane polyurethane is particularly suitable for the field of medical materials such as artificial skin and artificial blood vessels.

Description

technical field [0001] The invention relates to a polyurethane material, in particular to a long-chain alkane polyurethane and its preparation method and application. Background technique [0002] Polyurethane materials are a class of polymer materials containing -NHCOO- repeating structural units in the main chain. They are widely used in coatings, Adhesives, elastomers, solid rocket propellants and medical materials and other fields. Existing polyurethanes mainly include polyester polyol type polyurethane, polyether polyol type polyurethane, and hydroxyl-terminated polyolefin type polyurethane materials. Such common polyurethanes are all obtained by addition reaction of polyester polyol and polyether polyol with polyisocyanate in the presence of a catalyst, followed by chain extension reaction, and can be divided into two types: thermoplastic and thermosetting. [0003] The application of polyurethane in the field of medical materials has been studied relatively maturely...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/83C08G18/69C08G18/62C08G18/32C08G18/10
CPCC08G18/10C08G18/6208C08G18/69C08G18/833C08G18/3206
Inventor 李化毅何怡楠李倩郑水蓉胡友良
Owner INST OF CHEM CHINESE ACAD OF SCI
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