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

A technology of polyurethane coatings and dopamine, applied in polyurea/polyurethane coatings, anti-fouling/underwater coatings, coatings, etc., can solve the problems of poor bonding effect on the surface of flexible substrates, unfavorable long-term use of coatings, etc., to achieve preparation The method is simple and feasible, the cost is low, and the effect of good development prospects

Active Publication Date: 2022-03-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bonding effect of the polyurethane coating on the surface of the inert flexible substrate is poor, which is not conducive to the long-term use of the coating
Marine biological mussels can achieve adhesion on different substrates by secreting proteins whose main component is dopamine. Based on the principle of bionics, people have prepared many dopamine-modified materials by imitating the active ingredients of mussel proteins through chemical synthesis and used them It is used in different fields, but there are few reports on the use of its modified polyurethane materials in the field of marine antifouling, especially for flexible substrates.

Method used

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

Examples

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preparation example Construction

[0070] 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.

[0071] In the embodiment, the adhesion force of the side chain dopamine functionalized polyurethane coating on the surface of natural rubber is measured by the 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.

[0072] In the examples, the molecular weight of side chain dopamine functionalized polyurethane is measured by gel permeation chromatography, and polystyrene with narrow distribution is used as standard sample.

[0073] Refer to GB / T 21886-2008 for the anti-bacterial adhesion t...

Embodiment 1

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

[0079] (1) In the reactor, 25 parts by weight of 2,2-dimethylolpropionic acid, 25 parts by weight of 2,2-dimethoxypropane and 0.5 parts by weight of p-toluenesulfonic acid are added to 50 parts by weight of acetone , reacted at 25°C for 5 hours, neutralized with sodium bicarbonate after the reaction and dried by suction to obtain the product intermediate monomer P1; 40 parts by weight of the product intermediate monomer P1, 30 parts by weight of N-hydroxysuccinimide, 50 parts by weight of 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride was added to 50 parts by weight of dichloromethane, reacted at 0°C for 2 hours and then reacted at 25°C Under reaction for 24 hours, after the completion of the reaction, extract with 10wt% sodium bicarbonate aqueous solution, concentrate and dry to obtain the intermediate product P2; 50 parts by weight of the intermedia...

Embodiment 2

[0091] A preparation method for side chain dopamine functionalized polyurethane coating, comprising the steps of:

[0092] (1) In the reactor, 25 parts by weight of 2,2-dimethylolpropionic acid, 25 parts by weight of 2,2-dimethoxypropane and 0.5 parts by weight of p-toluenesulfonic acid are added to 50 parts by weight of acetone , reacted at 25°C for 5 hours, neutralized with sodium bicarbonate after the reaction and dried by suction to obtain the product intermediate monomer P1; 40 parts by weight of the product intermediate monomer P1, 30 parts by weight of N-hydroxysuccinimide, 50 parts by weight of 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride was added to 50 parts by weight of dichloromethane, reacted at 0°C for 2 hours and then reacted at 25°C Under reaction for 24 hours, after the completion of the reaction, extract with 10wt% sodium bicarbonate aqueous solution, concentrate and dry to obtain the intermediate product P2; 50 parts by weight of the intermedia...

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Abstract

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

Description

technical field [0001] The invention belongs to the technical field of marine antifouling materials, and in particular relates to a side chain dopamine 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/06C09D5/16C08G18/66C08G18/42C08G18/10C08G18/32
CPCC09D175/06C09D5/1625C09D5/1662C08G18/10C08G18/4277C08G18/4238C08G18/329C08G18/3206C08K5/46
Inventor 张广照马春风潘健森陈振江谢庆宜
Owner SOUTH CHINA UNIV OF TECH
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