Method for producing high-solid content low-viscosity polymer polylol

A technology with high solid content and polyols, which is applied in the field of low viscosity polymer polyols, batch and continuous methods to prepare high solid content, and can solve problems such as high product viscosity, blocked pipes, and high toxicity of tetramethylsuccinonitrile

Inactive Publication Date: 2009-05-13
TIANJIN DAGU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] From the existing technology and some problems reflected in the production process, it is necessary to further solve the quality problems of polymer polyols. One is the problem of high product viscosity; the other is that during the production process, when removing residual monomers, there are The by-product tetramethylsuccinonitrile crystals precipitate out and block the pipeline; the third is that the residual tetramethylsuccinonitrile in the product is highly toxic

Method used

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  • Method for producing high-solid content low-viscosity polymer polylol

Examples

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preparation example Construction

[0027] The preparation method of polymer polyol:

[0028] Method 1: Add most of the basic polyether polyol A into a reaction kettle equipped with a stirring device, a feeder, and a thermometer, and replace with nitrogen three times to make the oxygen content in the system meet the experimental requirements. Under the protection of nitrogen, the temperature of the materials in the reactor was raised, and when the temperature was stabilized at 115° C., the materials were fed at a certain feeding speed. The feed was formulated from the remaining base polyether A, styrene, acrylonitrile, free radical initiator, dispersant and chain transfer agent. After the feeding is completed, ripen for 2 hours and degas under reduced pressure for 2 hours. During the whole reaction process, the temperature is preferably controlled at 115±5°C. Cool down and discharge.

[0029] Method 2: Add a certain amount of polymer polyol with target solid content into a reaction kettle equipped with a stirr...

specific example 1

[0030] Concrete example 1: adopt method 1, add basic polyether polyol A 240g in the reactor, nitrogen replacement three times, and make the material in the reactor warm up under the protection of nitrogen, when the temperature reaches 115 ℃, according to a certain feeding speed, enter material. Feed composition: 100g of acrylonitrile, 229g of styrene, 2.2g of initiator, 2.8g of chain transfer agent, 21g of dispersant SA-01, and 105g of basic polyether polyol A. The residence time was controlled at 60 minutes, and after the feeding was completed, it was matured for 2 hours, degassed under reduced pressure, cooled and discharged to obtain polymer polyol A.

specific example 2

[0031] Concrete example 2: adopt method 1, add basic polyether polyol A 240g in the reaction kettle, nitrogen replacement three times, and make the material in the reaction kettle warm up under the protection of nitrogen, when the temperature reaches 115 ℃, feed in at a certain feeding speed material. Feed composition: 100g of acrylonitrile, 229g of styrene, 2.2g of initiator, 2.8g of chain transfer agent, 21g of dispersant SA-02, and 105g of basic polyether polyol A. The residence time was controlled at 60 minutes, and after the feeding was completed, it was matured for 2 hours, degassed under reduced pressure, cooled and discharged to obtain the polymer polyol B.

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Abstract

The invention relates to a method for preparing polymer polyol with high solid content and low viscosity. The method adopts an intermittent method or a continuous method, and uses a basic polyether polyol as a continuous phase to perform in situ polymerization on a vinyl monomer, polyether polyol, a dispersing agent, and a chain transfer agent under the action of a free radical initiator to produce the polymer polyol with high solid content and low viscosity; or the method uses a certain amount of the polymer polyol with target solid content as a substrate material, mixes the raw materials such as the basic polyether polyol, the free radical initiator, the vinyl monomer, the dispersing agent, and the chain transfer agent evenly according to certain mixture ratio, and adds the mixture to the substrate material continuously to be polymerized so as to obtain the polymer polyol with high solid content and low viscosity. The polymer polyol produced by the method has the advantages of low viscosity, stable dispersion of solid particles, small average particle size of the solid particles, and even particle size. The polymer polyol improves the physical mechanical properties of products applying the polymer polyol, and has wide application range.

Description

Technical field [0001] The present invention relates to the preparation method of two kinds of polymer polyols, in particular the present invention relates to batch and continuous methods for preparing high solid content, low viscosity polymer polyols. Background technique [0002] Polymer polyol is a new type of polyether raw material emerging with the development of polyurethane foam applications. It is used as a solid organic filler in polyurethane foam to increase the hardness of polyurethane foam and improve the overall performance of the foam. It is mainly used to produce high-load, high-resilience block foam, molded soft foam, etc., used for car seat cushions , Backrests, furniture pads, mattresses, carpet backings and automotive accessories, etc. [0003] Polymer polyol is a new type of modified polyether polyol. It is a polyether-modified variety prepared by grafting and polymerizing vinyl monomers based on polyether. It not only maintains the original flexibility...

Claims

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Application Information

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IPC IPC(8): C08L51/08C08L77/00C08L25/12C08F283/06C08F2/38
Inventor 周绍双单志坤刘志诚王一业
Owner TIANJIN DAGU CHEM CO LTD
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