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Semi-continuous process for preapring organofluorine polymer grafted polyether polyol

A technology of polyether polyol and grafted polyether, which is applied in the field of semi-continuous preparation of organic fluorine polymer and polyether polyol graft copolymer, can solve the problem of poor adhesion of fluorocarbon paint, wide polymer molecular weight distribution, Low monomer conversion rate and other problems, to achieve the effect of excellent weather resistance and strong adhesion

Inactive Publication Date: 2002-08-14
QINGDAO CHEM COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The organic fluoropolymer polyol prepared by batch mode has the characteristics of wide polymer molecular weight distribution, high viscosity, low monomer conversion rate, long preparation cycle and low equipment production capacity; the fluorocarbon paint produced by it has poor adhesion, paint Low film hardness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (a): Mixing kettle: 268g of vinyl acetate, 16g of undecylenic acid, 117g of unsaturated polyether polyol macromer I, 13g of initiator AIBN, and molecular weight regulator n-C 12 Add SH 4g into a mixing kettle equipped with a temperature controller and an electric stirrer with an effective volume of 1 liter, mix well and control the temperature at 10-15°C.

[0043] (b) Polymerization reactor: Add solvents such as xylene 350g and methyl isobutyl ketone 150g respectively to a pressure-resistant stainless steel polymerization reactor with a temperature controller, nitrogen protection, and an electric stirrer with an effective volume of 2 liters, nitrogen Replace three times, control the oxygen content to less than 60ppm, and raise the temperature to 72±2°C.

[0044] (c) Continuous feeding: The materials in 1 mixing tank are fed into the polymerization at the feed rate (mass) of 52.2g / hour and the feed liquid CTFE of 2 organofluorine monomers is 75g / hour respectively. In th...

Embodiment 2：(C)“CTFE75g/”“TFE65g/”， Embodiment 1。1。 Embodiment 3

[0047] (a): Mixing kettle: 185g of vinyl acetate, 16g of undecylenic acid, 200g of unsaturated polyether polyol macromer II, 13g of initiator AIBN, and molecular weight regulator n-C 12 Add SH4g into a mixing kettle equipped with a temperature controller and an electric stirrer with an effective volume of 1 liter, mix well and control the temperature at 10-15°C.

[0048] (b) Polymerization reactor: Add solvents such as xylene 350g and methyl isobutyl ketone 150g respectively to a pressure-resistant stainless steel polymerization reactor with a temperature controller, nitrogen protection, and an electric stirrer with an effective volume of 2 liters, nitrogen Replace three times, control the oxygen content to be less than ppm, and raise the temperature to 72±2°C.

[0049] (c) Continuous feeding: The materials in 1 mixing tank are fed into the polymerization at the feed rate (mass) of 52.2g / hour and the feed liquid CTFE of 2 organofluorine monomers is 75g / hour respectively. In t...

Embodiment 4

[0052] Embodiment 4: except that "CTFE is with the feed rate of 75g / hour" in (C) is changed into " TFE with the feed rate of 65g / hour ", all the other are the same as embodiment 3. The properties of the organic fluoropolymer grafted polyether polyol after drying are shown in Table 1.

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PUM

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Abstract

A process for semi-continuously preparing organofluorine polymer grafted polyether polyol includes such steps as adding mixed solvent, xylene and methylisobutyl methanone to reactor, adding the monomer mixture liquid including vinyl or acryl ester, unsaturated polyether polyol, AIBN, etc and the organofluorine monomer liquid to reactor, and copolymerizing reaction. The product can be used to prepare F-C paint which features high weatherability and resistance to acid, alkali, chemical corrosion and ultraviolet ray, and high adhesion.

Description

technical field [0001] The invention relates to a preparation technology of fluororesin, which is a semi-continuous preparation method of organic fluoropolymer polyether polyol, more specifically, a semi-continuous preparation method of graft copolymer of organic fluoropolymer and polyether polyol Preparation. Background technique [0002] Fluorocarbon paint is a paint with unique properties and multiple uses. It uses fluororesin as the basic raw material, mixed with fillers, pigments, dispersants and other additives, and is formed by uniform dispersion. Using aliphatic diisocyanate as the curing agent can be cured at room temperature and has strong adhesion. Fluorocarbon paint has excellent properties such as weather resistance, acid resistance, alkali resistance, chemical corrosion resistance and ultraviolet resistance, and is widely used in the coating of building exterior walls, chemical equipment, steel structures, vehicles, highway guardrails, an...

Claims

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Application Information

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IPC IPC(8): C08G81/02
Inventor 顾尧韩方煜
Owner QINGDAO CHEM COLLEGE
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