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

AI Technical Summary

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

Method used

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

Examples

Experimental program
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Example Embodiment

[0027] Preparation method of polymer polyol:

[0028] Method 1: Add most of the basic polyether polyol A to a reactor equipped with a stirring device, a feeder, and a thermometer, and replace it 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 is increased. When the temperature is stable at 115°C, the materials are fed at a certain feeding rate. The feed is formulated from the remaining base polyether A, styrene, acrylonitrile, free radical initiator, dispersant and chain transfer agent. After the addition is complete, it is matured for 2 hours and degassed under reduced pressure for 2 hours. During the entire reaction process, the temperature is best controlled at 115±5°C. Cooling and discharging.

[0029] Method 2: Add a certain amount of polymer polyol with a target solid content into a reactor equipped with a stirring device, a feeder, and a t...

Example Embodiment

[0030] Specific example 1: Using method 1, add 240g of basic polyether polyol A to the reactor, replace with nitrogen three times, and increase the temperature of the materials in the reactor under the protection of nitrogen. When the temperature reaches 115°C, feed it at a certain feeding rate. material. Feed composition: 100 g of acrylonitrile, 229 g of styrene, 2.2 g of initiator, 2.8 g of chain transfer agent, 21 g of dispersant SA-01, and 105 g of basic polyether polyol A. The residence time is controlled at 60min, and the material is matured for 2 hours after the addition is completed, degassed under reduced pressure, and the material is cooled down to obtain the polymer polyol A.

Example Embodiment

[0031] Specific example 2: Using method 1, add 240g of basic polyether polyol A to the reactor, replace with nitrogen three times, and increase the temperature of the materials in the reactor under the protection of nitrogen. When the temperature reaches 115°C, feed it at a certain feeding rate. material. Feed composition: 100 g of acrylonitrile, 229 g of styrene, 2.2 g of initiator, 2.8 g of chain transfer agent, 21 g of dispersant SA-02, and 105 g of basic polyether polyol A. The residence time is controlled at 60min, and the material is matured for 2 hours after the addition is completed, degassed under reduced pressure, and discharged to obtain 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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