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Modified polyether polyhydric alcohol and application thereof in polyurethane foam materials

A technology of polyether polyols and copolymer polyols, which is applied in the field of synthesis of modified polyether polyols, and can solve problems such as irregular cells, high viscosity of polymer polyols, and fall of foam products

Active Publication Date: 2019-05-24
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 polyhydric alcohol and application thereof in polyurethane foam materials
  • Modified polyether polyhydric alcohol and application thereof in polyurethane foam materials
  • Modified polyether polyhydric alcohol and application thereof in polyurethane foam materials

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 modified polyether polyhydric alcohol and an application thereof in polyurethane foam materials. The preparation method of the modified polyether polyhydric alcohol comprises the following steps of: a compound A is reacted with polyether polyhydric alcohol, the compound A is an anhydride and / or dicarboxylic acid compound containing a polymerizable double bond, which preferably selected from one or two of maleic anhydride and itaconic anhydride, maleic anhydride is preferable; 2) the product obtained in step 1) is reacted with an epoxy compound containing a polymerizabledouble bond in the presence of a catalyst to obtain the modified polyether polyhydric alcohol. The obtained modified polyether polyhydric alcohol has more active sites, the polymerizable double bond is used for end capping, the modified polyether polyhydric alcohol is used as a dispersion stabilizer to be applied to the synthesis of the copolymer polyhydric alcohol, and the modified polyether polyhydric alcohol has the advantages of better dispersion 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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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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