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Polyisocyanurate foams

A polyisocyanurate, polyisocyanate technology, applied in the field of molded products, achieves the effects of easy demoulding, reduced cycle time, and high heat deflection temperature

Inactive Publication Date: 2001-07-18
IMPERIAL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have disadvantages because the high temperature during the exotherm exceeds the initial softening point of the polymer that has not yet completed the reaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 6

[0094] The formulation of Example 6 was repeated, but the A:B ratio and index were varied. The obtained results are listed in Table 2.

[0095] Table 2

example 6C-6L

[0097] The formulation of Example 6 was repeated, except that the isocyanate A:B ratio remained constant at 2.25 and changed exponentially. The results are shown in Table 3.

[0098] table 3

[0099] 6K

[0100] 1. Second

example 10

[0102] This example illustrates the use of an amine based polyol with an acid blowing agent.

[0103] A-component

[0104] Rubinate 8700; index 290; A:B ratio 1.8

[0105] B. Component parts by weight Rubinol F-455 57.99 Jeffamine T-5000 8.39 Rubinol R-015 14.48 Glycerin 3.62 Unitol DSR 6.06 Loxioi G71S 0.6 Priolube 1414 0.07 Tegostab B-8465 1.62 50% KOH+50% water 0.78 water 0.37 seconds Reaction system mixing 7 . The resulting foam has: Cream phase = 36 sec Gel time = 102 sec Tack free time = 124 sec Hard time = 142 sec Foam appearance is good

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PUM

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Abstract

The invention provides polyisocyanurate systems for manufacture of polyisocyanurate foam components such as those from SRIM processes. The reaction systems include a polyisocyanate and a polyisocyanate reactive component that includes a trimerization catalyst, polyol, and a carboxylic acid blowing agent, optionally with water as a co-blowing agent. The reaction systems can be blown exclusively with carboxylic acid to produce SRIM products which can be demolded with reduced mold residence time.

Description

field of invention [0001] The present invention relates to polyisocyanurate foams, compositions for making the foams and molded articles made from the foams. Background of the invention [0002] Molded microcellular and non-microcellular foam articles have found many uses in the automotive and construction industries. Illustrative automotive applications include the use of the foam in articles such as instrument panels, door panels, pillars, and seat backs. Examples of non-automotive applications include modular housing, shower brackets and doors. While many foam parts are produced by reaction injection molding (RIM), woven or nonwoven fiber reinforcements are known to provide foam parts with greater tensile strength and flexural modulus. This molding method is called Structural Reaction Injection Molding (SRIM) method. [0003] The SRIM process generally entails pouring or injecting a liquid foam composition into a closed or open mold, which, if op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/79C08G18/09C08G18/22C08G18/36C08G18/66C08J9/00
CPCC08G18/6696C08G2101/0025C08G18/6662C08G2120/00C08J2375/04C08G18/225C08G18/092C08G2125/00C08G2101/0083C08G18/36C08J9/0023C08G2110/0025C08G2110/0083
Inventor A·罗塔克尔
Owner IMPERIAL CHEM IND LTD
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