Polyethers and their use in the production of flexible polyurethane foams

A technology of polyether and polyether polyol, which is used in the preparation of polymer polyol compositions for flexible polyurethane foams and in the field of flexible polyurethane foams, and can solve problems such as insufficient VOC release

Pending Publication Date: 2022-02-22
COVESTRO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of phenolic antioxidants alone may not be sufficient to meet stringent VOC release and other requirements for the resulting foam

Method used

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  • Polyethers and their use in the production of flexible polyurethane foams
  • Polyethers and their use in the production of flexible polyurethane foams
  • Polyethers and their use in the production of flexible polyurethane foams

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0120] The preparation of free rise foams generally requires mixing all components together except the isocyanate component, then adding the isocyanate component to the mixture and briefly mixing. The mixture is then poured into boxes and left to rise freely. The settling of the foam is measured and the foam is oven cured eg at 125°C for 5 minutes. After 16 hours at room temperature, shrinkage is recorded and foam properties can then be determined by various tests.

[0121] The preparation of molded foam typically involves premixing the polyol component with additives. The isocyanate component is then added to the premix in an amount sufficient to achieve the desired isocyanate index. The reaction mixture is then dispensed by hand or machine into metal molds, which are typically preheated to a temperature of 62°C to 66°C. The reaction mixture was foamed to fill the mold, and after 4 to 5 minutes, the foam was removed from the mold and crushed (physically) to ensure that all...

Embodiment

[0124] The following components were used in the examples.

[0125] Polyol 1 : Propylene oxide adduct of sorbitol containing 12% ethylene oxide as capped and hydroxyl number 33.

[0126] PPD N-phenyl-p-phenylenediamine obtained from SigmaAldrich

[0127] MAA Methyl acetoacetate, available from SigmaAldrich

[0128] TFAA: Trifluoroacetic acid, available from SigmaAldrich

[0129] product preparation :

[0130] Polyol 1 (6000 g, 0.94 moles) and MAA (70 g, 0.60 moles) were added to a 12 L flask under a small nitrogen sparge. The mixture was heated at 140°C for 3 hours until methanol evolution ceased. The mixture was then vacuum stripped to remove any residual MAA and methanol to give a light colored liquid (referred to as polyol 2). Polyol 2 (2700 g), PPD (49.7 g) and 800 mL of toluene were added to a 5 L flask with stirring and a small nitrogen sparge. TFAA (1.0 g) was added and the mixture was heated at reflux (ca. 120° C.) until the theoretical amount of water ...

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Abstract

Disclosed are primary amine-containing polyethers that are the reaction product of a reaction mixture comprising: (a) a polyether of the formula A(OZOX)n where (i) A is a polyether derived from a hydroxyl-functional polyether having a hydroxyl functionality (y) of 1 to 8 and an OH number of 20 to 400 mg KOH / g, wherein the free hydroxyl functionality of A is y-m, wherein m is a number having a value of 1 to 7; (ii) Z is a divalent residue comprising an alkylene oxide moiety; (iii) X is an amine reactive moiety; and (iv) n is a number having a value of 1 to 7; and (b) an amino diphenylamine. Polyol compositions that include a primary amine-containing polyether polyol are also described, a polymer polyol compositions, polyurethane foams and methods of producing flexible polyurethane foams.

Description

technical field [0001] The present application relates generally to polyethers prepared from aminodianilines, and the use of said polyethers in the preparation of flexible polyurethane foams, for example by their inclusion in polymer polyol compositions for the preparation of flexible polyurethane foams. Background technique [0002] A polymer polyol (also known as a filler polyol) is a dispersion of polymer particles in a base polyol. They may be particularly useful in preparing foams with higher hardness levels than conventional, unmodified polyols; Flexible polyurethane foams are prepared by reacting polyols with polyisocyanates in the presence of polyols. In many cases, the polyol is a polyether polyol which is the alkoxylation reaction product of one or more H-functional starters and one or more alkylene oxides. Typically, propylene oxide is the predominant or only alkylene oxide used due to the resulting hydrophobicity of the resulting polyether polyol. [0003] A d...

Claims

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Application Information

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IPC IPC(8): C08G65/333C08G18/50C08G18/48C08G18/63C08G101/00
CPCC08G65/33313C08G18/5027C08G18/482C08G18/632C08G2110/0008C08G2101/00C08G18/6795C08G18/635C08F283/06C08F220/10C08G18/14
Inventor R·L·阿德金斯B·L·尼尔A·S·弗雷齐
Owner COVESTRO LLC
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