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Polyurethane elastomer and preparation method and application thereof

A polyurethane elastomer and prepolymer technology, applied in the field of polymer materials, can solve the problems of unsuitable application requirements and high hardness, and achieve the effects of excellent elongation at break, good unidirectional elongation, and wide application prospects

Inactive Publication Date: 2017-07-21
镇江朝阳机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general preparation methods, commercially available polyester polyols are usually used as the main polyol polymer component, but sometimes the product has the disadvantage of high hardness, which is not suitable for application requirements

Method used

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  • Polyurethane elastomer and preparation method and application thereof
  • Polyurethane elastomer and preparation method and application thereof
  • Polyurethane elastomer and preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0019] The preparation method of polyurethane elastomer of the present invention specifically comprises the steps:

[0020] S101: First, mix 30-50 parts by weight of naphthalene diisocyanate and 100-150 parts by weight of polyether polyol, then heat to 110-130°C and stir for 5h-8h to obtain the a prepolymer;

[0021] S102: 1-10 parts by weight of isophorone diisocyanate, 0.1-1 part by weight of diphenylmethane diisocyanate, and 0.1-1 part by weight of toluene diisocyanate Mix with 10 to 20 parts by weight of polyester polyol, then heat to 100°C to 110°C and stir for 4h to 6h to obtain the second prepolymer;

[0022] S103: Add 0.1-1 part by weight of a chain extender and 10-20 parts by weight of isophorone diisocyanate to the first prepolymer, and then stir and react for 3h-6h, Obtain the third prepolymer;

[0023] S104: Add 0.1-1 part by weight of chain extender and 10-20 parts by weight of naphthalene diisocyanate to the second prepolymer, and then stir and react for 3h-6h...

Embodiment 1

[0030] Embodiment 1 proposes a kind of preparation method of polyurethane elastomer, specifically comprises the following steps:

[0031] (1) First, 30 parts by weight of naphthalene diisocyanate and 150 parts by weight of polyoxypropylene diol were mixed, then heated to 110° C. and stirred for 8 hours to obtain the first prepolymer.

[0032] (2) parts by weight are 1 part of isophorone diisocyanate, 1 part of diphenylmethane diisocyanate, 0.1 part of toluene diisocyanate and 20 parts of Polyadipate-butylene glycol was mixed, then heated to 100°C and stirred for 6h to obtain the second prepolymer.

[0033] (3) Add 0.1 parts by weight of propylene glycol and 20 parts by weight of isophorone diisocyanate to the first prepolymer, and then stir and react for 3 hours to obtain a third prepolymer.

[0034] (4) Add 1 part by weight of 4,4'-bis-sec-butylaminodiphenylmethane and 10 parts by weight of naphthalene diisocyanate to the second prepolymer, and then stir and react for 6 hour...

Embodiment 2

[0040] Embodiment 2 proposes a kind of preparation method of polyurethane elastomer, specifically comprises the steps:

[0041] (1) First, 50 parts by weight of naphthalene diisocyanate and 100 parts by weight of polytetrahydrofuran diol were mixed, then heated to 130°C and stirred for 5 hours to obtain the first prepolymer.

[0042] (2) parts by weight are 10 parts of isophorone diisocyanate, 0.1 parts of diphenylmethane diisocyanate, 1 part of toluene diisocyanate and 10 parts of The polycaprolactone was mixed, then heated to 110° C. and stirred for 4 hours to obtain the second prepolymer.

[0043] (3) Add 1 part by weight of 1,4-bis-sec-butylaminobenzene and 10 parts by weight of isophorone diisocyanate to the first prepolymer, then stir and react for 6 hours to obtain third prepolymer.

[0044] (4) Add 0.1 parts by weight of ethylene glycol and 20 parts by weight of naphthalene diisocyanate to the second prepolymer, and then stir and react for 3 hours to obtain a fourth ...

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Abstract

The invention provides a polyurethane elastomer and a preparation method thereof. The preparation method specifically comprises the following steps that firstly, naphthalene diisocyanate and polyether polyols are mixed and are then heated and stirred to obtain a first prepolymer; isofluolone diisocyanate, diphenylmethane diisocyanate and toluene diisocyanate are mixed with polyester polyols and then are heated and stirred to obtain a second prepolymer; a chain extender and isofluolone diisocyanate are added into the first prepolymer to obtain a third prepolymer; a chain extender and naphthalene diisocyanate are added into the second prepolymer to obtain a fourth prepolymer; the third prepolymer, the fourth prepolymer, water and an emulsifier are mixed, and then foaming and curing treatment are performed to obtain the polyurethane elastomer. The polyurethane elastomer has higher elongation at break, can be well unidirectionally elongated and does not break when being resistant to impact, meanwhile has better processing performance and storage stability and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polyurethane elastomer and its preparation method and application. Background technique [0002] Polyurethane elastomer is a block polymer composed of soft segments and hard segments alternately. Its properties are between rubber and plastics, and it is especially suitable for cushioning and other damping systems. Excellent dynamic and static mechanical properties and cheap and convenient processing methods all determine its importance in the field of industrial applications in our country. In particular, polyurethane elastomers prepared by using isophorone diisocyanate (NDI) have been widely used as auxiliary springs for bicycles, motorcycles, automobile suspensions, furniture, or high-vibration substrates due to their excellent bending fatigue resistance. In the general preparation method, commercially available polyester polyols and the like are usuall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L75/06C08G18/76C08G18/75C08G18/66C08G18/65C08G18/63C08G18/48C08G18/42C08G18/32C08F283/06C08F220/06C08G101/00
CPCC08F283/06C08G18/4238C08G18/4277C08G18/4825C08G18/4854C08G18/632C08G18/6564C08G18/657C08G18/6607C08G18/6618C08G18/724C08G18/755C08G18/7614C08G18/7671C08G18/7678C08G2110/0083C08F220/06
Inventor 汪伟志朱朝平
Owner 镇江朝阳机电科技有限公司
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