Preparation method of polymer polyol

A polyol and polymer technology, applied in the field of high molecular polymer material preparation, can solve the problems of unstable process, low conversion rate, three waste discharge, etc., and achieve the effect of advanced technology and good product quality

Active Publication Date: 2020-06-09
LIAONING FANGDA ENG DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of them have unstable process, low conversion rate, large monomer residue in the obtained product, and serious discharge of three wastes.

Method used

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  • Preparation method of polymer polyol

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Embodiment Construction

[0027] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0028] see figure 1 , embodiment 1-4 prepares polymer polyol, adopts the following method:

[0029] 1) Mixture preparation: add acrylonitrile and initiator to the initiator solution tank, fully dissolve at -10~0°C to prepare mixture A; mix basic polyether and intermediate polyether (PA) Add it to the mixing tank first, then add styrene, acrylonitrile, compound A, and chain transfer agent, and mix evenly at a temperature of 5~10°C to prepare compound B.

[0030] Specifically, the mass ratio of acrylonitrile, initiator, basic polyether, intermediate polyether, styrene and chain transfer agent is: 9~13.5 : 0.3 : 55~65 : 3 : 20~30 : 0.3.

[0031] The basic polyether is polyether polyol with a molecular weight of 3005. A...

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Abstract

The invention discloses a preparation method of polymer polyol. The preparation method comprises the following steps: 1) preparation of a mixture: adding acrylonitrile and azodiisobutyronitrile into an initiator dissolving tank, carrying out sufficient dissolving to obtain a mixture A, adding basic polyether and intermediate polyether into a mixture tank, adding styrene, acrylonitrile, the mixtureA and a chain transfer agent, and carrying out uniform mixing to obtain a mixture B; 2) graft polymerization: feeding the mixture B into a polymerization kettle for a polymerization reaction; 3) curing: allowing reacted materials in the polymerization kettle to overflow into a curing kettle for curing, and enabling the cured materials to enter a crude product storage tank; 4) monomer removal: conveying crude polymer polyol into a monomer removal kettle, carrying out vacuum treatment for 4-6 hours, and removing residual monomers and moisture; and 5) finished product inspection: sampling and analyzing a product in a finished product inspection tank. The method has the advantages of advanced and mature process, high conversion rate, good product quality and small influence on the environment.

Description

technical field [0001] The invention relates to the field of preparation of high molecular polymer materials, in particular to a preparation method of polymer polyols. Background technique [0002] Polymer polyol (POP) is a modified basic polyether with special properties. It is prepared by graft copolymerization with basic polyether (PPG) and acrylonitrile (AN) and styrene (SM). A blend system composed of polyether, graft base polyether, copolymer of vinyl monomers such as styrene and acrylonitrile, or self-polymer. It not only maintains the original flexibility of polyether chains, but also has the good structural properties of vinyl polymers. The polyurethane product produced by the reaction of the modified basic polyether and polyisocyanate can have functions such as high load-bearing and high modulus, and improve the physical and mechanical properties of the product, and can be widely used in the production of high-load flexible foam, high resilience soft foam Foams...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F212/08C08F220/44C08G18/63
CPCC08F283/06C08G18/632C08F212/08C08F220/44
Inventor 陈淑艳李学斌徐钧古宇李俊廷杨振东姚林王宏伟齐爽
Owner LIAONING FANGDA ENG DESIGN CO LTD
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