High solid share fluorine-containing polyurethane preparation method

A polyurethane, high-solid technology, applied in the fields of foamed plastics, adhesives, elastomers, coatings, and biomedical materials, can solve the problems of unsatisfactory overall performance, complex process and high cost, achieve good mechanical properties, simple preparation process, Effects with low equipment requirements

Inactive Publication Date: 2007-07-11
JIAXING HEXIN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for the preparation of high-solid fluorine-containing polyurethane, which uses fluorine-containing acrylic Monomer as fluorine source to prepare fluorine-containing polyurethane with high solid content, good hydrophobicity and water repellency, chemical resistance and high biocompatibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix 10g of phthalic anhydride polyester polyol CFH-108, 10g of polyethylene glycol PEG-400, 9g of isophorone diisocyanate, 0.5g of hexafluorobutyl methacrylate, and 1.5g of fluorooctyl methacrylate to form a composition containing Fluorine monomer, 6g acrylonitrile, 1g hydroxyethyl acrylate, 3g vinyl acetate are mixed to form vinyl monomer, 0.04g azobisisobutyl nitrile, 0.004g stannous octoate, 3g acetone, add in the reaction vessel, in Reaction at 35°C for 45 minutes to obtain product A; a prepolymer prepared by reacting 12g of trimethylolpropane with a molar ratio of NCO:OH of 1.20:1 and toluene 2,4-diisocyanate, mixed with 2g of xylene as a curing agent B is ready for use; take 7g of product A and 14g of curing agent B, mix evenly, paint on the substrate and cure at 30°C to obtain high-solid step-by-step interpenetrating fluorine-containing polyurethane.

Embodiment 2

[0021] 10g polytetrahydrofuran ether glycol, 10g polyester polyol POL-2016, 6g polymethylene polyphenyl polyisocyanate, 0.3g trifluoroethyl methacrylate, 1.7g heptadecafluorooctyl ethyl methacrylate , 3.5g of methyl methacrylate mixed with fluorine-containing monomers, 0.05g of benzoyl peroxide, 0.001g of cobalt naphthenate, and 2g of toluene were added to the reaction vessel, stirred and heated to 75°C for 80 minutes to obtain product A for later use ; Mix 8gl, 6-hexamethylene diisocyanate trimer and 2g ethyl acetate evenly as curing agent B for subsequent use; take 25g of product A and 10g of curing agent B and mix evenly to obtain high-solid fluorine-containing polyurethane resin. The fluorine-containing polyurethane resin is poured into the mold and cured at 20°C for 72 hours to obtain a step-by-step interpenetrating fluorine-containing polyurethane with high solid content.

Embodiment 3

[0023]Mix 20g of polyether N210 polyol, 1g of dodecafluoroheptyl methacrylate, 1g of hexafluorobutyl methacrylate, 2g of perfluoroalkyl ethyl acrylate to form fluorine-containing monomer, 4g of styrene, 4g of methacrylic acid Methyl ester mixed to form vinyl monomer, 0.04g benzoyl peroxide, 0.006g stannous octoate, 1g N,N-dimethylformamide, 9g liquefied diphenylmethane-4,4-diisocyanate (MDI) , Mix 2g of acetone at 20°C evenly, and use it as component A; without adding curing agent to component B, pour A directly into the mold at 90°C for 12 hours to obtain high solids synchronous interpenetrating fluorine-containing polyurethane.

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PUM

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Abstract

The invention discloses a making method of high-solid fluorine polyurethane, which comprises the following steps: adding polyol, polyisocyanates, fluorine monomer, vinyl monomer, initiator, catalyst, solvent with weight rate at 5-20 2-80.5-5. 51-60.015-0.100.001-0.060-2 in the reactor; stirring to react at 20-100 deg. c for 10-300 min; obtaining the product A; using product A and hardener B with weight rate at 0.5- 50-5 to form fluoropolyurethane resin; solidifying the resin for 4-72h at 0-120 deg. c to obtain the product.

Description

technical field [0001] The invention relates to the fields of coatings, biomedical materials, foam plastics, adhesives and elastomers, in particular to a method for preparing a hydrophobic and chemical-resistant high-solid fluorine-containing polyurethane. Background technique [0002] Fluorine-containing Polyurethane (FPU) is a new type of functional material, which is prepared by modifying and modifying traditional polyurethane with fluorine by various means. Several common methods of fluorine modification and modification of polyurethane mainly include the following: ①Mechanical physical blending method, the principle of which is to use forced blending to physically blend some fluorine-containing polymers with polyurethane to introduce fluorine; ② Polyurethane soft segment, hard segment introduction method, the principle of soft segment introduction method is to use perfluoropolyether, semifluoropolyether, perfluoropolyester or the above fluorine-containing polyol and ord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/30C08G18/08C08G18/24C08G18/76
Inventor 刘长生鄢红阳周爱军朱仕惠
Owner JIAXING HEXIN CHEM IND
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