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Thermoplastic polyurethane elastomer containing cyano in soft segment and preparation method thereof

A thermoplastic polyurethane and elastomer technology, applied in the field of polyurethane elastomer preparation, can solve the problems of harsh storage conditions of masterbatch, and achieve the effects of low compression set, excellent mechanical properties and high mechanical strength

Active Publication Date: 2016-05-04
SHANGHAI YITAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple and convenient to use, and the degree of cross-linking is controllable, but because isocyanate is easy to react with water in the air and lose its activity, the storage conditions of the masterbatch will be relatively harsh

Method used

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  • Thermoplastic polyurethane elastomer containing cyano in soft segment and preparation method thereof
  • Thermoplastic polyurethane elastomer containing cyano in soft segment and preparation method thereof
  • Thermoplastic polyurethane elastomer containing cyano in soft segment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] will structure as a = 1, b = 10, y = 2 0.1mol of hydroxyl-terminated polybutadiene acrylonitrile, mixed with 10mol of polyadipate-1,4-butylene glycol ester to form hydroxyl-terminated polybutadiene acrylonitrile molar content 1% premix.

[0045] Then take 65 parts by weight of the premix and mix it with 30 parts by weight of benzhydrylmethane-4,4'diisocyanate and 5 parts by weight of 1,4-butanediol, and then inject the resulting mixture into a heated twin-screw extruder. Exit. The temperature of the screw is 150° C., and the rotational speed of the screw is 150 rpm; the reactants are extruded and granulated to obtain a thermoplastic polyurethane elastomer body with cyano groups.

[0046] The thermoplastic polyurethane elastomer body containing cyano group, 4,4'-biphenyl azide with 50% mole of hydroxyl-terminated polybutadiene acrylonitrile, and 50% mole of 4,4'-biphenyl azide ammonium chloride. Compounds containing bis-azido functional groups have a melting point o...

Embodiment 2

[0051] will structure as a=3, b=6, y=3, 5 mol of hydroxyl-terminated polybutadiene acrylonitrile, and 10 mol of polytetrahydrofuran to form a premix with a content of 50% of hydroxyl-terminated polybutadiene acrylonitrile.

[0052] Then 40 parts by weight of the premix was mixed with 45 parts by weight of benzhydrylmethane-4,4'diisocyanate, 15 parts by weight of ethylene glycol, and the resulting mixture was injected into a heated twin-screw extruder. The temperature of the screw is 220° C., and the rotational speed of the screw is 300 rpm; the reactants are extruded and granulated to obtain a thermoplastic polyurethane elastomer body with cyano groups.

[0053] The thermoplastic polyurethane elastomer body containing cyano group, 4,4'-biphenyl azide with 5 mole percent of hydroxyl-terminated polybutadiene acrylonitrile, and 100 mole percent of 4,4'-biphenyl azide Ammonium chloride, the melting point of the compound containing bis-azido functional group is less than 200°C, a...

Embodiment 3

[0059] will structure as a = 10, b = 10, y = 10 2.5mol hydroxyl-terminated polybutadiene acrylonitrile, 5mol tetrahydrofuran hydroxyl-terminated, 5 polyadipate-1,4-butylene glycol ester diol, composed of hydroxyl-terminated poly Premix with 25% butadiene acrylonitrile content.

[0060] Then 50 parts by weight of the premix are mixed with 40 parts by weight of benzhydrylmethane-4,4' diisocyanate, 10 parts by weight of 1,4-butanediol, and the resulting mixture is injected into a heated twin-screw extruder . The temperature of the screw is 200° C., and the rotational speed of the screw is 200 rpm; the reactants are extruded and granulated to obtain a thermoplastic polyurethane elastomer body with cyano groups.

[0061] The thermoplastic polyurethane elastomer body containing cyano group, 4,4'-biphenyl azide with 25% mole of hydroxyl-terminated polybutadiene acrylonitrile, 4,4'-biphenyl azide with 80% mole Ammonium chloride, the melting point of the compound containing bis-azi...

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Abstract

The invention relates to a thermoplastic polyurethane elastomer containing cyano in a soft segment and a preparation method thereof. The preparation method comprises the following steps: polymerizing hydroxyl-terminated polybutadiene acrylonitrile, polyester macromolecular dihydric alcohol and / or polyether macromolecular dihydric alcohol, organic diisocyanate and micromolecule dihydric alcohol to obtain a product, namely, a thermoplastic polyurethane elastomer body containing the cyano in the soft segment; and blending the thermoplastic polyurethane elastomer body containing the cyano in the soft segment , a cross-linking agent containing diazido functional groups and a cross-linking catalyst, and performing a cross-linking reaction to obtain the thermoplastic polyurethane elastomer. The performance of a material can be conveniently adjusted by simply adjusting the consumption of the cross-linking agent, the cross-linked thermoplastic polyurethane elastomer has excellent mechanical performance and relatively low compressive permanent deformation, and can better meet the requirements of high-pressure sealing elements, automobile cushions and other parts requiring high mechanical strength and low compressive permanent deformation.

Description

technical field [0001] The invention belongs to the technical field of polyurethane elastomer preparation, and relates to a thermoplastic polyurethane elastomer containing cyano group in the soft segment and a preparation method thereof, in particular to a thermoplastic polyurethane elastomer containing cyano group unit in the synthesized soft segment by click reaction method. A thermoplastic polyurethane elastomer obtained by cross-linking and modifying the polyurethane elastomer body and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a kind of polymer synthetic material composed of flexible segment and rigid segment, which has rubber elasticity at low temperature and can be plasticized at elevated temperature. TPU has good processing performance, wide hardness range, oil resistance, solvent resistance, wear resistance, and is a good choice for engineering materials. [0003] With the development of industry, in so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/69C08G18/66C08G18/42C08G18/48C08G18/44C08G18/32C08J3/24C08K5/28
CPCC08G18/4238C08G18/4244C08G18/44C08G18/4854C08G18/6588C08G18/664C08G18/6674C08G18/698C08J3/24C08K5/28
Inventor 管祎嗣程睿南建举刘森林何三雄
Owner SHANGHAI YITAN NEW MATERIAL CO LTD
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