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Antioxidants for the preparation of low emission pur systems

A technology of antioxidants and compounds, applied in the fields of polyurethane foam, antioxidant mixtures and polyurethane systems, and antioxidants, can solve problems such as functional degradation and adverse changes in mechanical properties, and achieve the effect of improving performance characteristics

Active Publication Date: 2020-03-27
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This oxidation can lead to detrimental changes in the mechanical properties of the polymer, and therefore of the parts in which the polymer is used
This may end up degrading undesired functionality

Method used

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  • Antioxidants for the preparation of low emission pur systems
  • Antioxidants for the preparation of low emission pur systems
  • Antioxidants for the preparation of low emission pur systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0207] Example 1 (this invention)

[0208] In the 250ml three-necked flask that has distillation bridge and KPG stirrer, add the hydroxyphenyl carboxylate of 29.3g namely 3-(3,5-di-tert-butyl-4-hydroxyl phenyl) methyl propionate (Iva- 1) with 61.9g of general formula CH 3 [CH 2 CH 2 O] 11 H polyether and 0.06 g of sodium acetate. The flask was filled with nitrogen and the mixture was heated to 180°C and stirred for 1 hour. The flask was then evacuated and the methanol formed was directly distilled off from the reaction mixture with stirring under reduced pressure (10 mbar) using a distillation bridge. After cooling, 6.9 g of benzofuran-2-one (IIa) and 1.7 g of phosphite (IIIa) were dissolved in the resulting liquid hydroxyphenylcarboxylate.

Embodiment 2

[0209] Example 2 (this invention)

[0210] In the 250ml three-neck flask that has distillation bridge and KPG stirrer, add the hydroxyphenyl carboxylate of 29.3g namely 3-(3,5-di-tert-butyl-4-hydroxyl phenyl) methyl propionate (Iva -1) with 75.8g of general formula CH 3 [CH 2 CH(CH 3 )O] 2 [CH 2 CH2 O] 11 H polyether and 0.55 g of tetrabutoxytitanium. The flask was filled with nitrogen and the mixture was heated to 180°C and stirred for 1 hour. The flask was then evacuated and the methanol formed was directly distilled off from the reaction mixture with stirring under reduced pressure (10 mbar) using a distillation bridge. After cooling, 7.9 g of benzofuran-2-one (IIa) and 2.0 g of phosphite (IIIa) were dissolved in the resulting liquid hydroxyphenylcarboxylate.

Embodiment 3

[0211] Example 3 (non-invention)

[0212] In the 250ml three-neck flask that has distillation bridge and KPG stirrer, add the hydroxyphenyl carboxylate of 29.3g namely 3-(3,5-di-tert-butyl-4-hydroxyl phenyl) methyl propionate (Iva -1) with 15.6 g of 1-octanol and 0.2 g of p-toluenesulfonic acid. The flask was filled with nitrogen and the mixture was heated to 180°C and stirred for 1 hour. The flask was then evacuated and the methanol formed was distilled off directly from the reaction mixture using a distillation bridge under reduced pressure (10 mbar) with stirring. After cooling, 3.5 g of benzofuran-2-one (IIa) and 0.9 g of phosphite (IIIa) were dissolved in the resulting liquid hydroxyphenylcarboxylate.

[0213] Preparation of polyurethane foam

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Abstract

The present invention relates to a compound of formula (I): wherein each group is as defined in claim 1, q is 1, 2 or 3, preferably 2 or 3, especially 2; n is an integer of 1-30, preferably An integer of 1-10, advantageously 1, 2, 3, 4, 5 or 6, for example 1, 2, 3 or 4, especially 1; k is an integer of 0-50, preferably 10-30; m is 0 An integer of -50, such as 1-40; and o is an integer of 0-50, preferably 0-30, especially 0, wherein (k+m+o)>10.

Description

technical field [0001] The invention belongs to the field of antioxidant and plastics, especially the field of polyurethane. In particular, the invention relates to novel antioxidants, antioxidant mixtures and polyurethane systems, especially polyurethane foams. Background technique [0002] Antioxidants are compounds of various chemical structures used to inhibit or prevent unwanted changes in protected substances caused by oxygen exposure and other oxidative processes. [0003] Antioxidants are required in plastics, eg for protection against aging, since synthetic polymers are fundamentally susceptible to oxidation by oxygen and the presence of small amounts of impurities generally facilitates this oxidation process. This oxidation can lead to unfavorable changes in the mechanical properties of said polymers, and thus of the parts in which they are used. This may end up causing unwanted functional degradation. Therefore, in order to prevent or at least inhibit this oxid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/332C08L75/08C08L71/02C08K5/1535C08K5/526C08J9/08C08G18/48C08G101/00
CPCC08G18/48C08G65/3326C08L75/08C08L2203/14C08L2201/08C08G2110/0083C08L71/02C08K5/1535C08K5/526C07C69/732C08G18/4829C08K5/005C08G18/165C08G18/2081C08G18/244C08G2350/00C08K5/1345C08G18/7621C08K5/527C08G2110/005C08G2110/0008C08L75/04C08G18/0838C08G18/14C08J9/0023C08J2205/06C08J2375/08C09K15/08C09K15/322
Inventor M·克雷布斯R·胡贝尔
Owner EVONIK OPERATIONS GMBH