Method and system for preparing polymer polyol

A polyol and polymer technology, applied in chemical instruments and methods, mixers, chemical/physical processes, etc., can solve the problems of increasing labor intensity and energy consumption of workers, shorten the cooling time of materials, reduce labor intensity, The effect of improving quality

Pending Publication Date: 2020-08-07
上海抚佳精细化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the disadvantages of increasing the labor intensity and energy consumption of workers when using single-flow batching in the continuous production of polymer polyols in the prior art, thereby providing a method for preparing polymer polyols and system

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  • Method and system for preparing polymer polyol

Examples

Experimental program
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Effect test

Embodiment 1

[0042] This example relates to a system for preparing polymer polyols.

[0043] Specifically, such as figure 1 As shown, the system for preparing polymer polyols includes a first feed unit 1 , a second feed unit 2 and a reactor 3 . The first feed unit 1 and the second feed unit 2 are arranged side by side, and the reactor 3 is connected to both the first feed unit 1 and the second feed unit 2 .

[0044] Wherein, the first feeding unit 1 is used for mixing the first material and delivering the first material to the reactor 3 , and the second feeding unit 2 is used for delivering the second material to the reactor 3 . Specifically, the first material is raw materials other than the basic polyether, usually including vinyl monomer A, chain transfer agent B, dispersant C and initiator D, and the second material is the basic polyether.

[0045] Optionally, in this embodiment, the first feeding unit 1 includes a batching tank 11 , a cooling system 12 and a dropping tank 13 . Amon...

Embodiment 2

[0055] This embodiment relates to a method for preparing polymer polyols, which is applied to the system provided in Example 1, and specifically includes the following steps:

[0056] S1. Vinyl monomer (acrylonitrile 1.05kg and styrene 2.45kg), chain transfer agent isopropanol 2.20kg, dispersant 1.30kg and initiator dimethyl azobisisobutyrate 0.20kg at 14 ℃ according to Proportional mixing to obtain the first material;

[0057] S2. Simultaneously transport 7.20kg of the first material and 30.00kg of the basic polyether to the reactor for polymerization.

[0058] Tested according to the GB / T12008.7 standard, the viscosity of the polymer polyol is 850mPa.s, the solid content is 10.05%, and the particle size distribution of the product is wide and uniform.

[0059] It takes 15 hours to produce 37.20kg of polymer polyol, and the batching frequency is once. After calculation, the energy consumption is 6.84 yuan / kg.

Embodiment 3

[0061] This embodiment relates to a method for preparing polymer polyols, which is applied to the system provided in Example 1, and specifically includes the following steps:

[0062] S1. Vinyl monomer (acrylonitrile 5.32kg and styrene 12.42kg), chain transfer agent isopropanol 2.66kg, dispersant 1.46kg and initiator dimethyl azobisisobutyrate 0.14kg at 14°C Proportional mixing to obtain the first material;

[0063] S2. Transport 22.00kg of the first material and 20.00kg of the basic polyether to the reactor for polymerization at the same time.

[0064] Tested according to the GB / T12008.7 standard, the viscosity of the polymer polyol is 3680mPa.s, the solid content is 45.08%, and the particle size of the product is evenly distributed.

[0065] It takes 17 hours to produce 42.00kg of polymer polyol, and the batching frequency is 2 times. After calculation, the energy consumption is 6.92 yuan / kg.

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Abstract

The invention relates to the technical field of chemical production, in particular to a method and a system for preparing polymer polyol. The method for preparing the polymer polyol comprises the following steps: uniformly mixing the raw materials except the basic polyether, and then mixing with the basic polyether to carry out polymerization reaction. The raw materials except the basic polyetherare uniformly mixed and then mixed with the basic polyether, so that on one hand, the material cooling time can be shortened, the production period is shortened, the production efficiency is improved,and on the other hand, the batching frequency and the labor intensity of workers can be reduced; and the self-polymerization reaction of the raw materials except the basic polyether can be prevented,so that impurities in the polymer polyol can be reduced, the quality of the polymer polyol can be improved, a pipeline can be prevented from being blocked by a product produced by a self-polymerization reaction, and meanwhile, the situation that a part of raw materials volatilize due to the fact that the temperature of the basic polyether is higher than the boiling point of the raw materials except the basic polyether can be avoided.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a method and system for preparing polymer polyols. Background technique [0002] Polymer polyol is a dispersion formed by the polymerization of vinyl monomers in basic polyether. It is a mixture that contains three types of polymers: 1. Unmodified polyether polyol (basic polyether ); 2. Copolymers and homopolymers of vinyl mixed monomers; 3. Vinyl copolymers grafted with polyether polyols. Polymer polyol not only maintains the original flexibility of polyether main chain, but also has certain characteristics of vinyl polymer branch chains such as rigidity and flame retardancy. It is a polyol containing organic fillers and can replace inorganic fillers. , its application in the synthesis of polyurethane foams, elastomers, adhesives and coatings can significantly improve the physical properties of products, so it has received extensive attention. [0003] The raw mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F212/10C08F220/44C08F2/01B01J19/18B01J4/00B01F13/10B01F15/06
CPCC08F283/06C08F2/01B01J19/18B01J4/001B01J4/007B01F33/80B01F33/811B01F33/8362B01F2035/98B01F35/93C08F212/10C08F220/44
Inventor 李志君王峰李玉博
Owner 上海抚佳精细化工有限公司
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