Preparing technology of polyurethane modified ethoxyline resin adapted for composite wear-resistant coating material

A polyurethane modification and epoxy resin technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor flexibility, achieve high bonding strength, save production costs, flexibility and impact resistance Good results

Inactive Publication Date: 2009-06-03
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention proposes a preparation process suitable for polyurethane-modified epoxy resin in composite wear-resistant coating materials, the polyurethane-modified epoxy resin obtained by this process, and the bonding strength of spare parts matrix High flexibility and good impact resistance, no plasticizers such as dibutyl phthalate and dioctyl phthalate, less or no tougheners such as polysulfide rubber and liquid nitrile rubber, It not only solves the problem of poor flexibility of ordinary epoxy resin, but also saves production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The invention discloses a preparation process of polyurethane modified epoxy resin suitable for composite wear-resistant coating materials, which uses polyether diol with a functionality of 2 and an average relative molecular weight of 1200-2200 and preheated toluene Diisocyanate or diphenylmethane-4,4'-diisocyanate reacts to synthesize polyether diol polyurethane prepolymer, standby; select bisphenol A type E-44 or E-51 epoxy resin that has been pre-dehydrated One of them is ready for use; according to the mass ratio of polyether diol polyurethane prepolymer and epoxy resin at 15-70:100, it undergoes polyaddition reaction to form polyurethane-modified epoxy resin.

Embodiment 2

[0019] As a preferred embodiment of the present invention, on the basis of Example 1, the polyether glycol described in the present invention is selected from polypropylene glycol, polytetrahydrofuran, tetrahydrofuran-propylene oxide copolyether or polyε-caprolactone wherein A sort of.

Embodiment 3

[0021] Bisphenol A type E-44 and E-51 type epoxy resins are modified with polyether glycol polyurethane prepolymer to obtain polyurethane modified epoxy resins. The specific operation steps are as follows:

[0022] a. Add the calculated amount of bisphenol A type E-44 or E-51 epoxy resin into the stainless steel vacuum dehydration kettle, heat to 100-120°C, vacuumize, keep the vacuum degree of 10-80mmHg, and remove moisture for 1-2 hours. spare. According to the mass ratio epoxy resin: polyether glycol polyurethane = 100: 15-70 to prepare materials.

[0023] b. Add the calculated amount of toluene diisocyanate (TDI) or diphenylmethane-4,4'-diisocyanate (MDI) into the stainless steel preheating kettle, preheat to 50-60°C, and set aside. According to the molar ratio of isocyanate NCO:hydroxyl OH=2:1, and the excess of isocyanate NCO is 3-5%, the proportioning reaction is carried out to prepare materials.

[0024] C. Add one of polypropylene glycol, polytetrahydrofuran, tetrahy...

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PUM

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Abstract

The invention discloses a preparing technology of polyurethane modified ethoxyline resin adapted for composite wear-resistant coating material. Polyether dihydroxy alcohol having a degree of functionality of 2 and an average relative molecular weight of 1200 to 2200 is reacted with toluene di-isocyanate or diphenylmethane-4,4'-diisocyanate prepared for preheating to synthetize polyether dihydroxy alcohol polyurethane performed polymer for reservation; one of bisphenol A E-44 and E-51 after pre-dehydration is selected for reservation; polyurethane modified epoxy is formed through polyaddition reaction in which a mass ratio of polyether dihydroxy alcohol polyurethane performed polymer to epoxide resin is 15 to 70: 100. The polyurethane modified epoxy obtained by the technology has high bonding strength, good flexibility and shock resistance with basal bodies of spare parts, totally without using plasticizers, such as dibutyl phthalate, dioctylphthalate, etc., without using or using less plasticizers, such as polysulfide rubber, liquid acrylonitrile butadiene rubber, etc., thereby not only solving the problem that general epoxide resin has bad flexibility but also saving the production cost.

Description

technical field [0001] The invention relates to the technical field of preparation technology of polyurethane modified epoxy resin in a series of composite wear-resistant coating materials for equipment repair. The composite wear-resistant coating material can be used for equipment and equipment that resist erosion and wear caused by mixing solid particles and fluids. The repair and protection of spare parts has excellent wear resistance and anticorrosion performance, and can be used in mining, mineral processing, metallurgy, chemical industry, water conservancy, electric power, petroleum, coal and other industries. Background technique [0002] In mining, mineral processing, metallurgy, chemical industry, water conservancy, electric power, petroleum, coal and other industrial production, the abrasive particles produced by liquid and gas entraining solid particles have serious erosion and wear on equipment. Equipment and spare parts that are prone to wear and tear mainly inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/40C08G18/58C08G18/48C09D175/04
Inventor 杨进忠陈炳炎胡泽松刘厚明梁友伟谢春华陈晓青
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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