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Polyurea repairing method of rubber fender

A rubber fender and repair method technology, applied in the field of rubber fender repair, can solve problems such as complex secondary vulcanization repair process, affecting product performance, over-sulfur aging, etc., achieve low cost, small steam consumption, and ensure product quality quality effect

Active Publication Date: 2013-09-25
YANTAI TAIHONG RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to provide a polyurea repair method for rubber fenders. The technical problem to be solved is: to realize the normal temperature repair of the fender lacking rubber, so as to overcome the complicated secondary vulcanization repair process, high energy consumption and oversulfurized aging. Defects affecting product performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The first step is to clean up the defective parts: clean up the defective parts by grinding.

[0045] The second step, primer: the primer includes a rubber primer for the rubber part and a metal primer for the skeleton board part. Among them, the metal primer is two-component, and its formula and synthesis process are as follows:

[0046] Component A: 30% isocyanate; 13% polycaprolactone polyol; 13% E-20 type epoxy resin; 13% E-51 type epoxy resin; 30.7% xylene; 0.3% benzoyl chloride.

[0047] A component synthesis process:

[0048] The raw materials and various solvents are dehydrated and ready for use.

[0049] Add isocyanate and benzoyl chloride to the reactor respectively, and then adjust the temperature of the reactor to 40-50°C

[0050] And slowly add polycaprolactone polyol dissolved in an organic solvent, the addition is completed in about 1 hour, and the temperature is raised to 75°C for 2 hours. Then add E-20 type epoxy resin, react at 75°C for 3 hours, th...

Embodiment 2

[0090] The first step is to clean up the defective parts: clean up the defective parts by grinding.

[0091] The second step, primer: the primer includes a rubber primer for the rubber part and a metal primer for the skeleton board part. Among them, the metal primer is two-component, and its formula and synthesis process are as follows:

[0092] Component A: 40% isocyanate; 19.5% polycaprolactone polyol; 10% E-20 epoxy resin; 10% E-51 epoxy resin; 20% butyl acetate; 0.5% benzoyl chloride.

[0093] A component synthesis process:

[0094] The raw materials and various solvents are dehydrated and ready for use.

[0095] Add isocyanate and benzoyl chloride to the reactor respectively, and then adjust the temperature of the reactor to 40-50°C

[0096] And slowly add polycaprolactone polyol dissolved in an organic solvent, the addition is completed in about 1 hour, and the temperature is raised to 70° C. for 2 hours. Then add E-20 type epoxy resin, react at 80°C for 3 hours, the...

Embodiment 3

[0135] The first step is to clean up the defective parts: clean up the defective parts by grinding.

[0136] The second step, primer: the primer includes a rubber primer for the rubber part and a metal primer for the skeleton board part. Among them, the metal primer is two-component, and its formula and synthesis process are as follows:

[0137] Component A: 25% isocyanate; 10% polycaprolactone polyol; 22% E-20 type epoxy resin; 22% E-51 type epoxy resin; 20.9% cyclohexanone; 0.1% benzoyl chloride.

[0138] A component synthesis process:

[0139] The raw materials and various solvents are dehydrated and ready for use.

[0140] Add isocyanate and benzoyl chloride to the reactor respectively, and then adjust the temperature of the reactor to 40-50°C

[0141] And slowly add polycaprolactone polyol dissolved in an organic solvent, the addition is completed in about 1 hour, and the temperature is raised to 80° C. for 2 hours. Then add E-20 type epoxy resin, react at 70°C for 3 ...

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Abstract

The invention provides a polyurea repairing method of a rubber fender; a polyurea repairing material has double components whose formulas are respectively as follows: the component A comprises 40-60% of isocyanate and 40-60% of hydroxyl terminated polyether; and the component B comprises 40-65% of amino-terminated polyether, 20-50% of delayed amine chain extender, 0-2% of tackifier and 5-15% of color paste. The polyurea repairing method provided by the invention is a normal temperature repairing method and secondary vulcanization in a tank is not needed. Therefore, the polyurea repairing method of the rubber fender, provided by the invention, has the outstanding advantages of simple process, low cost and small vapor consumption; overvulcanization aging cannot be caused by secondary vulcanization and product quality is ensured. As main body rubber materials of polyurea and the fender have substantially same elastic modulus, the normal use of a product is not affected after the product is repaired.

Description

technical field [0001] The invention relates to a method for repairing rubber fenders. Background technique [0002] If the rubber fender has appearance defects after molding, such as lack of glue, it needs to be partially repaired. As the repair method of the prior art, rubber material is generally used to repair, and the whole is put into the tank for secondary vulcanization. The disadvantages of this type of method mainly lie in: first, the restoration process is complicated, the cycle is long, and the efficiency is low. Second, high energy consumption. Third, two high-temperature vulcanizations have been implemented on the fenders, resulting in over-sulfur aging and affecting product performance. Contents of the invention [0003] The present invention aims to provide a polyurea repair method for rubber fenders. The technical problem to be solved is: to realize the normal temperature repair of the fender lacking rubber, so as to overcome the complicated secondary vu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G18/10C09D175/02C08G18/42C08G18/08C09D175/06C09D175/08
Inventor 徐国谦张文强宋占昭程怀华柳伟杰
Owner YANTAI TAIHONG RUBBER
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