Combined polyether, polyurethane foam and its preparation method and application

A technology for combining polyether and polyether polyol, which is applied in the field of combining polyether and polyurethane foam and its preparation, can solve the problems of large pouring amount of power insulating rods, poor foam density distribution, and decreased foam performance, so as to reduce the on-site installation. , high dimensional stability, high adhesion effect

Inactive Publication Date: 2018-04-24
SHANGHAI DONGDA POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of foam cracking, swelling, poor foam density distribution, foam performance decline, and core burning in the prior art due to the large amount of pouring of electric insulation rods and the long milking time required, and the front and rear pouring materials. Provide a combination polyether, polyurethane foam and its preparation method and application

Method used

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  • Combined polyether, polyurethane foam and its preparation method and application
  • Combined polyether, polyurethane foam and its preparation method and application
  • Combined polyether, polyurethane foam and its preparation method and application

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Embodiment Construction

[0033] The present invention is further illustrated below by means of examples, but the present invention is not limited to the scope of the examples. For the experimental methods that do not specify specific conditions in the following examples, select according to conventional methods and conditions, or according to the product instructions.

[0034] The parts described in the following examples are all parts by weight.

[0035] In the following examples, the raw material sources used are:

[0036] Polyether polyol A: YD-8350, Hebei Yadong Chemical Group Co., Ltd.;

[0037] Polyether polyol B: SD-7100, Shanghai Dongda Chemical Co., Ltd.;

[0038] Polyester polyol C: PS-3152, Nanjing Jinling Stepan Chemical Co., Ltd.;

[0039] Crosslinking agent: glycerol, Shanghai Lingfeng Chemical Reagent Co., Ltd.;

[0040] Foam stabilizer: L-580, Evonik Degussa (China) Investment Co., Ltd.;

[0041] DabcoLK-221, Air Products;

[0042] Catalyst: JXP-509, Air Products Company;

[004...

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Abstract

The invention discloses premixed polyether polyols, polyurethane foam and its preparation method and application. The premixed polyether polyols comprise polyols, a catalyst, a foam stabilizer, a cross-linking agent, a chemical foaming agent, a fire retardant and a physical foaming agent, wherein polyols comprise polyether polyol and polyester polyol; the polyether polyol comprises, by weight, 50-80 parts of polyether polyol A and 10-30 parts of polyether polyol B; the polyester polyol is 10-30 parts by weight of benzolic acid anhydride polyester polyols C; and the catalyst comprises a non-delayed catalyst and a delayed catalyst. The polyurethane foam can have high compressive strength, low heat conductivity coefficient, high dimensional stability, low water absorption, good electrical insulating property, high binding power, high production efficiency, aging resistance and chemical resistance, and can be used to prepare electric insulating rods.

Description

technical field [0001] The invention relates to a composite polyether, polyurethane foam and its preparation method and application. Background technique [0002] The tower structure is an important special support structure in infrastructures such as power transmission, communication, railway, and municipal administration. Its structural performance directly affects the safety, economy, and reliability of the line. The poles and towers widely used in overhead transmission lines at home and abroad mainly include wooden poles, concrete poles or prestressed concrete poles, steel pipe concrete poles, steel pipe poles and iron towers. [0003] Patent Publication No. CN102003100A describes an electric insulating rod made of polyurethane and glass fiber composite material, so a method for preparing polyurethane combined polyether and polyurethane foam for the production process of polyurethane-glass fiber composite electric insulating rod is required. [0004] In the existing pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/48C08G18/50C08G18/18C08G18/76C08J9/14C08J9/08C08K5/521C08G101/00
CPCC08G18/18C08G18/1816C08G18/4018C08G18/4208C08G18/482C08G18/4883C08G18/5027C08G18/6611C08G18/7664C08J9/08C08J9/146C08J2203/02C08J2203/142C08J2203/204C08J2375/06C08J2375/08C08K5/521C08K2201/014C08G2110/0025C08G2110/0083
Inventor 倪军徐军王伟孔燕
Owner SHANGHAI DONGDA POLYURETHANE
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