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Process for preparing polyurethane foam

A technology of polyurethane foam and polyisocyanate, which is applied in the field of shaped products, polyurethane foam, and the preparation of the composition, and can solve the problems that the initial value cannot be maintained at a constant level

Active Publication Date: 2014-10-01
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This effect may prevent initial values ​​of these other properties from being maintained at constant levels over time

Method used

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  • Process for preparing polyurethane foam
  • Process for preparing polyurethane foam
  • Process for preparing polyurethane foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0074] (1) Preparation of polyether polyol composition

[0075] The polyether polyol (herein designated Polyether Polyol X) was prepared using a double metal cyanide (DMC) catalyst. The DMC catalyst is hexacyanocobaltate (III) zinc (II) / tert-butyl alcohol / polypropylene glycol complex in powder form, and the Zn(II) contained in it 3 [Co(III)(CN) 6 ] 2 with Zn(II)Cl 2 The molar ratio is about 1:1. In addition, the catalyst contains small amounts of water. The organic ligands in the catalyst included tert-butyl alcohol and polypropylene glycol with a number average molecular weight of about 1000 Daltons.

[0076] DMC catalysts are obtained by mixing K in the presence of organic ligands 3 [Co(CN) 6 ] salt solution and ZnCl 2 Aqueous salt solutions are prepared. The ZnCl 2 salt relative to K 3 [Co(CN) 6 ] The molar amount of salt excess is used. The solid catalyst product thus obtained is then filtered, washed, dried and ground into powder.

[0077] An arbitrary mixtu...

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Abstract

The present invention relates to a process for the preparation of polyurethane foams, wherein polyether polyols and polyisocyanates are reacted in the presence of: blowing agents; metals derived from complex metal cyanide complex catalysts from 1 to 30 ppmw based on polyether polyols; and 0.5 to 100 ppmw of phosphoric acid compounds based on polyether polyols, said phosphoric acid compounds comprising phosphoric acid selected from orthophosphoric acid, polyphosphoric acid and polymetaphosphoric acid, and / or partial esters of such phosphoric acid.

Description

technical field [0001] The invention relates to a process for the preparation of polyurethane foams by reacting polyether polyols and polyisocyanates in the presence of a blowing agent, to the polyurethane foams obtainable by said process, and to shaped articles containing said foams. Furthermore, the present invention relates to polyether polyol compositions useful in the preparation of said polyurethane foams, and to a process for the preparation of said compositions. Background technique [0002] Polyether polyols are commonly used in the preparation of polyurethane foams, such as flexible polyurethane foams. Flexible polyurethane foam is widely used in many applications. The main fields of application are the automotive and aircraft manufacturing industries, decorative furniture and technical articles. For example, all-foam seats, seat top cushions, and back and head restraints, all made of soft polyurethane foam, are widely used in automobiles and airplanes. Other ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G65/26
CPCC08G65/2663C08G18/4866C08G2101/00C08G18/185C08G18/22C08G18/48C08G65/26C08J9/00C08L75/04
Inventor E·范伊特维尔德M·B·埃莱维尔德W·P·C·米纳尔C·M·斯旺T·I·谭
Owner SHELL INT RES MAATSCHAPPIJ BV
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