A kind of side chain epoxy functionalized polyurethane coating and its preparation method and application

A polyurethane coating and functionalization technology, applied in polyurea/polyurethane coatings, antifouling/underwater coatings, coatings, etc., can solve the problem of ensuring the flexibility of flexible substrates, affecting the normal use of marine facilities, and reducing the service life of materials and other problems, to achieve the effect of simple and feasible preparation method, low cost and improved adhesion

Active Publication Date: 2022-03-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem of marine biofouling has brought serious troubles to the marine industry and maritime activities. Marine biofouling refers to the biofouling that marine animals, plants and microorganisms adhere to and grow on the surface of materials immersed in seawater, which will reduce the service life of materials. and affect the normal use of marine facilities
Most of the marine antifouling coatings used in the existing flexible substrates are acrylic esters, and it is difficult to ensure the flexibility that matches the flexible substrates, which limits the service life of the coatings

Method used

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  • A kind of side chain epoxy functionalized polyurethane coating and its preparation method and application
  • A kind of side chain epoxy functionalized polyurethane coating and its preparation method and application
  • A kind of side chain epoxy functionalized polyurethane coating and its preparation method and application

Examples

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preparation example Construction

[0056] The preparation of the natural rubber and the surface treatment method of the natural rubber are carried out according to the method described in Example 1 in the patent application 201110073775.8 A surface treatment method for improving the bonding performance of vulcanized natural rubber.

[0057] In the embodiment, the adhesion of side chain epoxy functionalized polyurethane coating on the surface of natural rubber is measured by pulling method, with reference to GB / T 5210, the test area is a circular area with a diameter of 20mm, and the pulling rate is set to 0.2MPa / s. Five different regions were tested for each sample, and the average value was taken as the test result.

[0058] In the examples, the molecular weight of the side-chain epoxy-functionalized polyurethane resin was measured by gel permeation chromatography, and polystyrene with narrow distribution was used as the standard sample.

[0059] The anti-bacterial adhesion test of side-chain epoxy-functiona...

Embodiment 1

[0064] A preparation method for side chain epoxy functionalized polyurethane coating, comprising the steps of:

[0065] (1) In the reactor, add 43.2 parts by weight of α-thioglycerol, 56.8 parts by weight of glycidyl methacrylate, 2 parts by weight of benzoin dimethyl ether, and 40 parts by weight of tetrahydrofuran. The intensity is 100mW / cm 2 ) reacted for 40 minutes under curing to obtain a dihydroxy epoxy monomer;

[0066] (2) In a reaction vessel under a nitrogen atmosphere, add 60 parts by weight of polycaprolactone diol (molecular weight 2000g / mol), 23.55 parts by weight of isophorone diisocyanate and 40 parts by weight of tetrahydrofuran and react for 1 hour at 70°C , to obtain a polyurethane prepolymer, add 15 parts by weight of dihydroxy epoxy monomer, 0.2 parts by weight of dibutyltin dilaurate, 1.45 parts by weight of 1,4-butanediol and 20 parts by weight of tetrahydrofuran and react at 80°C for 3 hours After the reaction, the side chain epoxy functionalized poly...

Embodiment 2

[0078] A preparation method for side chain epoxy functionalized polyurethane coating, comprising the steps of:

[0079] (1) In the reactor, add 43.2 parts by weight of α-thioglycerol, 56.8 parts by weight of glycidyl methacrylate, 2 parts by weight of benzoin dimethyl ether, and 40 parts by weight of tetrahydrofuran. The intensity is 100mW / cm 2 ) reacted for 40 minutes under curing to obtain a dihydroxy epoxy monomer;

[0080] (2) In the reaction vessel of nitrogen atmosphere, add 60 parts by weight of polyethylene adipate (molecular weight 2000g / mol), 25.83 parts by weight of isophorone diisocyanate and 40 parts by weight of tetrahydrofuran react at 70 DEG C for 1 hours, to obtain a polyurethane prepolymer, then add 10 parts by weight of dihydroxy epoxy monomer, 0.2 parts by weight of dibutyltin dilaurate, 4.17 parts by weight of 1,4-butanediol and 20 parts by weight of tetrahydrofuran react at 80 ° C for 3 Hour, after reaction finishes, obtain side chain epoxy functionaliz...

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Abstract

The invention discloses a side chain epoxy functionalized polyurethane coating, a preparation method and application thereof, and belongs to the technical field of marine antifouling materials. The side-chain epoxy-functional polyurethane coating is composed of the following components in parts by weight: 90-95 parts of side-chain epoxy-functional polyurethane resin; 0-5 parts of curing agent; 5-10 parts of antifouling agent ; Solvent 250 ~ 300 parts. The present invention introduces an epoxy functional group on the side chain of the polyurethane that can form an interface bond with the polar group on the surface of the activated rubber, which can effectively improve the adhesion effect between the side chain epoxy-functionalized polyurethane coating and the rubber surface. The effect can be controlled by controlling the amount of epoxy introduced.

Description

technical field [0001] The invention belongs to the technical field of marine antifouling materials, and in particular relates to a side chain epoxy functionalized polyurethane coating and a preparation method and application thereof. Background technique [0002] In recent years, developing marine resources and developing marine economy has become an important strategy of many countries. Flexible substrates such as rubber and fishing nets are more and more widely used in the ocean. However, the problem of marine biofouling has brought serious troubles to the marine industry and maritime activities. Marine biofouling refers to the biofouling that marine animals, plants and microorganisms adhere to and grow on the surface of materials immersed in seawater, which will reduce the service life of materials. And affect the normal use of marine facilities. Most of the marine antifouling coatings used in the existing flexible substrates are acrylic esters, and it is difficult to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/06C09D5/16C08G18/10C08G18/66C08G18/42C08G18/32C08J7/04C08L7/00
CPCC09D175/06C09D5/1625C08G18/10C08G18/6633C08G18/4277C08G18/4238C08J7/0427C08J2307/00C08J2475/06C08K5/47C08G18/675C08G18/3868
Inventor 张广照马春风谢庆宜陈振江潘健森
Owner SOUTH CHINA UNIV OF TECH
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