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Method for preparing polymer polyol

A technology of polyether polyols and polyols, applied in the field of preparing polymer polyols, which can solve problems affecting product quality, affecting normal production, and clogging pipes with products

Inactive Publication Date: 2013-04-10
CHINA PETROCHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that in the prior art, azobisisobutyrocyanide is used as an initiator, and the decomposed product blocks the pipeline, affecting normal production; and the azobisisobutyrocyanide decomposition product is mixed in the product, affecting product quality problem, providing a new method for preparing polymer polyols

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  • Method for preparing polymer polyol
  • Method for preparing polymer polyol

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Embodiment 1～4

[0019] definition

[0020] Polyol A: Polyether prepared by reacting a mixture of glycerol and propylene glycol having a hydroxyl functionality of 3 with propylene oxide and ethylene oxide. The polyether had an ethylene oxide content of 8.1% by weight, contained mainly secondary hydroxyl groups and had a hydroxyl number of 56.

[0021] Polyol B: polyether prepared by reacting trimethylolpropane with propylene oxide and ethylene oxide. The content of ethylene oxide is 8.5% by weight, and the hydroxyl value of the polyether is 35.

[0022] Polyol C: polyether prepared by reacting trimethylolpropane with propylene oxide and ethylene oxide. The content of ethylene oxide is 5.0% by weight, and the hydroxyl value of the polyether is 58.

[0023] Polyol D: polyether prepared by reacting glycerol with propylene oxide and ethylene oxide. The polyether had an ethylene oxide content of 9.6% by weight and a hydroxyl number of 56.

[0024] Macromonomer I: Polyether containing induced u...

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Abstract

The invention relates to a method for preparing polymer polyol, which is mainly used for solving the problems that 2, 2'-azobisisobutyronitrile is taken as an initiator in the prior art, decomposed products block pipelines, and normal production is influenced; and moreover, the decomposed products of the 2, 2'-azobisisobutyronitrile are mixed in the product, and the product quality is influenced. The method adopts the mixture of styrene, acrylonitrile, polyoxyalkylene polyether polyol and macromonomer to prepare the polymer polyol at the reaction temperature of at least 90 DEG C with the existence of a radical initiator and solvent with medium chain transfer activity, wherein the radical initiator is selected from peroxide-2-n-butyric acid-tert amyl, and the usage of the radical initiator accounts for 0.1-0.8% of the total weight of monomer. The technical scheme better solves the problems, and the method can be used for the industrial production of the polymer polyol.

Description

technical field [0001] The present invention relates to a process for preparing polymer polyols. Background technique [0002] Polymer polyols and their use in the production of polyurethane foams are well known. Polymer polyols are polyols modified or filled with polymers or copolymers of ethylenically unsaturated monomers. They are prepared by in situ polymerization of one or more ethylenically unsaturated monomers in polyether polyols in the presence of free radical polymerization initiators. Polyurethanes prepared from such polymer polyols are characterized by improved properties of flexible polyurethane foams, especially hardness and load-carrying capacity. [0003] At present, domestic production of polymer polyols basically uses azobisisobutylcyanide as an initiator (CN03116198.7), which has a good initiating effect and is the most commonly used polymerization initiator in POP production. But it has a significant shortcoming. The product after decomposition is tetr...

Claims

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Application Information

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IPC IPC(8): C08F290/00C08F283/06C08F212/10C08F4/34C08G18/63
Inventor 郑银才曾谦宋虹霞陈颂义沈立飞胡丽云邵知寅
Owner CHINA PETROCHEMICAL CORP
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