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Method for preparing rigid polyurethane foam

A technology of rigid polyurethane and polyurethane, applied in the direction of chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems that the influence of the system is not involved, and the improvement of product quality is not mentioned, etc.

Inactive Publication Date: 2021-12-07
COVESTRO DEUTSCHLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN1239914A discloses the process of preparing soft foam products by injecting the reaction raw materials with different density requirements twice while maintaining the mold angle at 40°, but it does not involve the influence of larger foaming angles on the system
This process can improve the quality of the product, but the specific value of each angle and the improvement of product quality are not mentioned

Method used

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  • Method for preparing rigid polyurethane foam
  • Method for preparing rigid polyurethane foam
  • Method for preparing rigid polyurethane foam

Examples

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preparation example Construction

[0105] The method of preparing a polyurethane of the present invention composite panel, comprising the steps of:

[0106] Fixing two surface layers; and

[0107] Between two facing towards the polyurethane reaction injection system, the polyurethane reaction system after the reaction to give the polyurethane foam molded composite panels.

[0108] Preferably, wherein the two surface layers by a fixed mold, said mold comprising an upper and a lower cover, said cover are fixed two facing the lower surface of the upper lid and the inner The inner surface.

[0109] The method of preparing a polyurethane composite panel according to the present invention, two facing, preferably secured by a mold, said mold comprising an upper and a lower cover, the two layers are fixed on the surface of the upper cover and the inner surface of the lower surface of the lid.

[0110] The method of preparing a polyurethane composite panels of the present invention is preferably a non-continuous production ...

Embodiment

[0115] Description of raw materials:

[0116] DC380, a polyether polyol, available from Jurong Ningwu development of new materials Ltd., hydroxyl value: 380, viscosity 11 250, functionality 5.8;

[0117] NJ8268, a polyether polyol, available from Jurong Ningwu development of new materials Ltd., hydroxyl value: 310, viscosity of 1200, a functionality of 4.0;

[0118] NJ8345, a polyether polyol, available from Jurong Ningwu development of new materials Ltd., hydroxyl value: 450, viscosity 17,000, a functionality of 5.2;

[0119] DC635C, a polyether polyol, available from Jurong Ningwu development of new materials Ltd., hydroxyl value: 500, viscosity of 5800, a functionality of 4.5;

[0120] Z450, polyether polyol, available from Creative Korth Taiwan Ltd., hydroxyl value: 345, viscosity 12,000, a functionality of 4.0;

[0121] TCPP, halogen flame retardants, purchased from Jiangsu Yoke Technology Co., Ltd.;

[0122] TEP, non-halogen flame retardants, purchased from Jiangsu Yoke Tech...

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Abstract

The invention relates to a method for preparing rigid polyurethane foam through a discontinuous production process, the rigid polyurethane foam prepared through the method and application of the rigid polyurethane foam.

Description

Technical field [0001] The present invention relates to a non-continuous production of rigid polyurethane foams and rigid polyurethane foams use a method, and the method of preparation prepared. Background technique [0002] Polyurethane foam sheet having a light weight, excellent thermal insulation properties, is widely used in freezers, cold, cold storage and construction. In the production of polyurethane sandwich plate, the preparation of non-continuous sheet of flexible, simple technology and other advantages, occupies a very important position in the market. [0003] In the cold chain, transport equipment insulation performance has been a concern. How to improve an important indicator of each manufacturer pursuit of insulation properties of the product. [0004] After conventional polyurethane composite prepared by a non-continuous process, prepared by a discontinuous process, i.e. prefabricated housing placed in a mold, the polyurethane resin is then injected into the mold...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08J9/14B32B27/40B32B27/06B32B5/20B32B7/027B32B33/00C08G101/00C08L75/08
CPCC08G18/4829C08G18/4816C08J9/141B32B5/20B32B7/027B32B33/00B32B38/00C08J2203/14B32B2038/0084B32B2266/0278B32B2307/30C08G18/7664C08G18/2036C08G18/1816C08G2110/005C08G2110/0025C08J9/0019B29C44/428B29C44/42B29K2075/00B29C44/3442C08G2110/0058C08G18/302C08G18/482C08G18/755C08K5/0066
Inventor 魏文平李立强高建伍
Owner COVESTRO DEUTSCHLAND AG