Amine catalysts suitable for producing flexible polyurethane foams having low emissions and being recatalysis stable

A technology of polyurethane foam and flexible polyurethane, which is applied in the field of amine catalysts for preparing low-emission, re-catalyzed and stable flexible polyurethane foam, can solve the problem of polyurethane foam damage and the inability of flexible polyurethane foam to have flammability And other issues

Inactive Publication Date: 2009-04-01
TH GOLDSCHMIDT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In addition to the disadvantage that such polyurethane foams tend to undergo recatalysis, i.e., failure of the polyurethane foam occurs, flexible polyurethane foams produced in this way often do not have satisfactory combustion behavior

Method used

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  • Amine catalysts suitable for producing flexible polyurethane foams having low emissions and being recatalysis stable
  • Amine catalysts suitable for producing flexible polyurethane foams having low emissions and being recatalysis stable
  • Amine catalysts suitable for producing flexible polyurethane foams having low emissions and being recatalysis stable

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0147] Preparation of flexible polyurethane foam

[0148] 300 g of polyol were used for foaming; the other components of the formulation were scaled accordingly. Here, for example, 1.0 part of a certain component means 1 g of this substance per 100 g of polyol.

[0149] For foaming, the polyol, water, catalyst combination (=amine catalyst and organotin compound according to the invention) and silicone stabilizer are thoroughly mixed by stirring. After adding the isocyanate, the mixture was stirred with a stirrer at 3000 rpm for 7 seconds and poured into a paper-lined wooden box (bottom area 27 cm x 27 cm). Foams were thus produced which were subjected to the use tests described below.

[0150] use test

[0151] Physical Properties of Flexible Polyurethane Foam

[0152] The prepared flexible polyurethane foam was evaluated according to the following physical properties:

[0153] a) Settling of the bubble after the end of the rise phase

[0154] b) Foam density (FD)

[01...

Embodiment 1

[0186]

[0187] *1 = CP 3322, available from Dow Chemical; this is a polyether triol with an OH number of 47.

[0188] *2 = BF2370, available from Evonik Goldschmidt GmbH; this is a polysiloxane-polyoxyalkylene block copolymer used as a foam stabilizer in the preparation of slab and molded flexible polyurethane foams.

[0189] *3 = 29, available from Evonik Goldschmidt GmbH; this is the tin(II) salt of ethylhexanoic acid.

[0190] The table below shows the types of amines and the foaming results.

[0191]

[0192] * = back pressure in mm of water

[0193]

[0194] Diethylaminoethoxyethanolamine is better than An important advantage of DMEE is that it does not promote recatalysis.

Embodiment 2

[0196] Foaming Results - Scattered

[0197] In order to examine the effect of the amine catalysts diethylaminoethoxyethanol and dimethylaminoethoxyethanol on foam emission, a formulation comprising the catalyst combination of the invention together with a low emission polyol was selected.

[0198]

[0199] *4 =Arcol It is available from Bayer AG; this is a low emission polyether triol

[0200] *5 = EF, available from Evonik Goldschmidt GmbH; this is tin ricinoleate.

[0201] The emission behavior of the above-mentioned foams was investigated according to the Daimler-Chrysler test method BP VWT 709 VOC measurement (30 minutes at 90° C.).

[0202] and get the following result:

[0203]

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Abstract

The present invention relates to the use of a reactive amine catalyst, in particular diethylaminoethoxyethanol and / or diethylethanolamine, in aqueous or organic solutions for producing flexible polyurethane foams having an increased recatalysis stability, and also a catalyst combination containing at least one reactive amine catalyst which can be used according to the invention; and at least one organic potassium, tin, bismuth and / or zinc compound; and / or at least one tertiary amine selected from the group consisting of triethylenediamine, triethylamine and / or silamorpholine; and / or at least one acid-blocked derivative of a tertiary amine.

Description

technical field [0001] The present invention relates to the use of amine catalysts in the preparation of low-emission, recatalyzed stable flexible polyurethane foams, suitable catalyst combinations and flexible polyurethane foams prepared therefrom. Background technique [0002] In industrial and domestic areas, flexible polyurethane foams are used for many technical purposes, for example for sound insulation, for the production of mattresses or for upholstering furniture. The automotive industry is characterized by a wide range of PU foams (such as traditional soft foams based on ether polyols and ester polyols, cold-curing highly elastic foams (HR foams) and rigid foams, as well as foams whose properties lie between these classifications. ) is a particularly important market. [0003] Flexible polyurethane foams are generally produced by reacting diisocyanates and polyisocyanates with compounds containing at least two hydrogen atoms which are reactive toward isocyanate gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/18C08G18/16C08G101/00
CPCC08G2101/0008C08L83/00C08G18/7621C08G2101/0083C08G18/4829C08G18/1825C08G2110/0008C08G2110/0083
Inventor A·特海登R·胡贝尔H-H·施隆斯R·兰德斯
Owner TH GOLDSCHMIDT AG
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