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Marine nontoxic antifouling organosilicon modified polyurea and preparation method thereof

A silicone and antifouling technology, applied in the field of coatings, can solve the problems of low mechanical strength, poor static antifouling ability, weak substrate adhesion, etc., and achieve controllable physical and mechanical properties of elastomers, adhesion properties and mechanical properties. Improve and improve the effect of poor weather resistance

Pending Publication Date: 2021-05-14
QINGDAO AIR NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these antifouling coatings contain biocides such as tin and copper. Although the toxic substances in the coatings have killed a large number of organisms attached to the bottom of the ship, they have caused serious marine pollution.
[0004] On the other hand, at present, organic silicon-based antifouling materials are also coated on the surface of marine structures. However, the current traditional organic silicon-based antifouling materials have low mechanical strength, weak adhesion to the substrate, and poor static antifouling ability. certain restrictions

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0033] Based on the same inventive concept, this application also provides a method for preparing a non-toxic and antifouling marine silicone-modified polyurea, including the preparation of component A and component B, wherein the preparation of component A Including: Stir and heat the polyol, add dimethyl hydroxy silicone oil, dehydrate under vacuum, then add polyisocyanate, and get A component after reaction;

[0034] The preparation of component B includes: mixing the amino-terminated polyether, polyol, coupling agent, chain extender, catalyst, water remover and color paste evenly, and then filtering to obtain component B.

[0035] In some embodiments, the preparation of component A is as follows: stirring and heating the polyol to 95-105°C, adding dimethyl hydroxy silicone oil, dehydrating under vacuum for 5-7 hours, and cooling down to below 50°C after the vacuum is released. Then add polyisocyanate, react at 90°C for 3 to 4 hours, measure the -NCO value, and discharge to...

Embodiment 1

[0043] A method for preparing a non-toxic and antifouling marine silicone-modified polyurea, comprising the preparation of component A and component B, wherein the preparation of component A includes:

[0044] S1. Stir and heat 100 parts by weight of PTMEG1000 and 50 parts of dimethyl hydroxy silicone oil 107 to 95°C, dehydrate for 5 hours under vacuum -0.1MPa, release the vacuum, cool down to below 50°C and add 200 parts by weight Part of MDI-50, reacted at 90°C for 4h, after the reaction, measured -NCO value was 14% and discharged to obtain component A;

[0045] The preparation of component B includes: 30 parts by weight of amino-terminated polyether D2000, 2 parts of silane coupling agent A171, 35 parts of chain extender α, ω-aminopropyl disiloxane, 0.1 part of Catalyst bismuth isooctanoate, 5 parts of 3A molecular sieve, and 1 part of black color paste are put into the storage tank of the high-speed disperser in turn, stirred at room temperature for 20 minutes, and then gr...

Embodiment 2

[0047] A method for preparing a non-toxic and antifouling marine silicone-modified polyurea, comprising the preparation of component A and component B, wherein the preparation of component A includes:

[0048] S1. Stir and heat 150 parts by weight of PTMEG1000 and 10 parts of dimethylhydroxysilicone oil 107 to 95°C, dehydrate for 5 hours under vacuum -0.1MPa, release the vacuum, cool down to below 50°C and add 200 parts by weight Part of MDI-50, reacted at 90°C for 4h, after the reaction, measured -NCO value was 14% and discharged to obtain component A;

[0049] The preparation of component B includes: 50 parts by weight of amino-terminated polyether D2000, 20 parts of α, ω-aminopropyl disiloxane, 1 part of titanate coupling agent KR-TTS, 0.1 parts The catalyst bismuth isooctanoate, 1 part of 4A molecular sieve, and 4 parts of black color paste are successively put into the storage tank of the high-speed disperser, stirred at room temperature for 15 minutes, and then filtered ...

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PUM

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Abstract

The invention provides marine nontoxic antifouling organosilicon modified polyurea and a preparation method thereof. The polyurea coating comprises a component A and a component B. The component A comprises polyol, dimethyl hydroxyl silicone oil and polyisocyanate; and the component B comprises amino-terminated polyether, polyol, a coupling agent, a chain extender and the like. Hydroxyl groups of dimethyl hydroxyl silicone oil and polyether polyol in the component A react with isocyanate, and a siloxy chain segment is connected to a main chain as a soft segment, so that organic silicon-based polyurea in which polysiloxane and a ureido chain segment are combined is prepared; the organic silicon polyurea can have a series of unique excellent properties of organic silicon and polyurea at the same time, the defect that a polysiloxane material is poor in mechanical property can be overcome, and the defect that the weather resistance of polyurea is poor can also be overcome; and compared with the prior art, the organic silicon modified polyurea provided by the invention has the advantages that the adhesive property and mechanical property between the organic silicon modified polyurea and a substrate are improved, and the organic silicon modified polyurea is non-toxic and does not influence marine organisms or destroy the environment.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an organosilicon-modified polyurea for marine non-toxic antifouling and a preparation method thereof. Background technique [0002] A large number of animals, plants and microorganisms live in the ocean. Generally, the undesirable deposition caused by the growth of marine organisms on the surface of marine solid facilities is called marine biofouling. Many marine animals, such as barnacles, oysters, mussels, lime worms, etc., often attach and grow on the bottom of ships, buoys, coasts, pipelines and other underwater facilities, causing bad sedimentation and harming marine production and scientific research activities. For example, marine organisms attach and grow on the bottom of the ship, reducing the speed of the ship, increasing the resistance of the ship, corroding the bottom of the ship, and destroying the hull; attaching to the surface of metal solids, destroying the prot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/61C08G18/50C08G18/32C09D175/02C09D5/16
CPCC08G18/6685C08G18/4854C08G18/61C08G18/5024C08G18/3893C09D175/02C09D5/1662
Inventor 王宝柱苏坤宋丹林旺刘丽媛
Owner QINGDAO AIR NEW MATERIALS
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