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Modified polyether polyol and its application in polyurethane foam

A polyether polyol modification technology, which is applied in the field of synthesis of modified polyether polyols, can solve the problems of high viscosity of polymer polyols, fall of foam products, long synthesis time, etc., and achieve excellent foam uniformity, open Uniform pores and improved affinity

Active Publication Date: 2021-09-03
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is simple, the reaction is complete, and the equipment investment is low, but the polymer polyol synthesized with the stabilizer prepared by maleic anhydride has a relatively high viscosity
EP02253584 discloses a stabilizer prepared by using phthalic anhydride and glycidyl methacrylate in the presence of a catalyst. The synthesis time is long, and an organotin catalyst is used, which remains in the copolymer polyol, which will affect the subsequent hydroxyl group. The compound reacts with isocyanate, causing the foam product to fall back, and the cells are irregular. In the extreme formula, it will cause foam collapse

Method used

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  • Modified polyether polyol and its application in polyurethane foam
  • Modified polyether polyol and its application in polyurethane foam
  • Modified polyether polyol and its application in polyurethane foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Preparation of dispersion stabilizer 1:

[0070] Mix 3000g of polyether polyol A, 24.2g of maleic anhydride, and 3g of KOH evenly, raise the temperature to 120°C, and react for 5h;

[0071] Then, add 5.0g OA-12 and 3.1g calcium bromide, stir evenly, then add 22.8g glycidyl acrylate and 1.78g hydroquinone, react at 100°C for 5h, the obtained product is a transparent brown-yellow liquid , the viscosity is 2520mPa.s, and the measured unsaturation is 0.095meq / g.

Embodiment 2

[0073] Preparation of dispersion stabilizer 2:

[0074] Mix 3000g of polyether polyol A, 22.5g of itaconic anhydride, and 3g of KOH evenly, raise the temperature to 130°C, and react for 3h;

[0075] Then, add 6g of OA-12 and 2.6g of barium bromide, stir evenly, then add 37.3g of glycidyl methacrylate and 1.78g of p-hydroxyanisole, react at 130°C for 4h, and the obtained product is a transparent pale Yellow liquid with a viscosity of 2850mPa.s and a measured unsaturation of 0.103meq / g.

Embodiment 3

[0077] Copolymer polyol 1 preparation:

[0078] The 500ml four-necked bottle is equipped with a stirrer, a heating device, a temperature control device and a feeder as a reactor. Add 55.4g of basic polyol B and 5.6g of dispersion stabilizer 1 into the reactor. After nitrogen replacement, stir and slowly raise the temperature to 110°C, and continuously add topping materials (10.47g of isopropanol, 85.71g of basic polyether polyol 46.55g of acrylonitrile, 69.83g of styrene, and 1.21g of azobisisobutyronitrile), the temperature is controlled at 115°C to 120°C. The dropwise addition was completed within 100 minutes, the feeding was completed, the aging reaction was carried out for 1 hour, the temperature was raised to 160°C, and the unreacted monomer was removed in vacuum for 2 hours to obtain the product, and the product index was measured. The solid content is 44.6%, and the viscosity is 4950cp (25°C).

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Abstract

The invention provides a modified polyether polyol and its application in polyurethane foam materials. The preparation method of the modified polyether polyol comprises the following steps: 1) reacting compound A with polyether polyol; Said compound A is an acid anhydride and / or dicarboxylic acid compound containing a polymerizable double bond, preferably selected from one or both of maleic anhydride and itaconic anhydride, preferably maleic anhydride; 2) the product obtained in step 1) The modified polyether polyol is prepared by reacting with an epoxy compound containing a polymerizable double bond in the presence of a catalyst. The modified polyether polyol obtained by this preparation method has more active sites, and is end-capped with a polymerizable double bond. It is used as a dispersion stabilizer for the synthesis of copolymer polyols, and has better dispersion Characterized by stability, filterability and low viscosity.

Description

technical field [0001] The present invention relates to the synthesis and application of a kind of modified polyether polyol, more specifically, the present invention relates to the synthesis of a kind of modified polyether polyol with multiple active sites and its use as dispersion stabilizer in synthesis Applications in copolymer polyols. Background technique [0002] Polyurethane foams are prepared by reacting polyisocyanates and polyols in the presence of blowing agents. Those skilled in the art have developed various modified polyol products in order to improve load bearing and other properties. Commonly used types are dispersions of polymer particles in polyols, such as vinyl polymer particle polyols (dispersion of styrene-acrylonitrile), polyurea particle dispersions (PHD polyols), polyisocyanate addition polymers (PIPA polyol, dispersion of polyurethane-polyurea particles). Currently commercialized widely is the dispersion of styrene / acrylonitrile copolymer in pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/332C08G65/331C08G18/66C08G18/65C08G18/63C08G18/48C08G18/32C08F283/06C08F220/44C08F212/08C08G101/00
Inventor 李付国刘洋鞠昌迅姜乃化刘斌秦承群王伦朋
Owner WANHUA CHEM GRP CO LTD
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