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Method for preparing organosilicon quaternary ammonium salt modified polyurethane resin for marine antifouling coating

A technology of organosilicon quaternary ammonium salt and polyurethane resin, which is applied in the field of organosilicon quaternary ammonium salt modified polyurethane resin, can solve problems such as poor compatibility, and achieve the effects of improving compatibility, good wear resistance, and reducing costs

Active Publication Date: 2013-09-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility of silicone and polyurethane, it is generally necessary to provide a mixed soft segment to improve

Method used

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  • Method for preparing organosilicon quaternary ammonium salt modified polyurethane resin for marine antifouling coating
  • Method for preparing organosilicon quaternary ammonium salt modified polyurethane resin for marine antifouling coating

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preparation example Construction

[0016] The preparation method of organic silicon quaternary ammonium salt modified polyurethane resin for marine antifouling coating of the present invention comprises the following steps:

[0017] 1. Preparation of dihydroxy-terminated organosilicon quaternary ammonium salt

[0018] 1 mole part of 1,3-bis[3-(1-methoxy-2-hydroxypropoxy)propyl]-tetramethyldisiloxane, 3-18 mole parts of γ-chloropropylmethyl Mix dimethoxysilane, 21-72 mole parts dimethyldimethoxysilane, and 30-90 mole parts deionized water, add 0.5-1.5 mole parts of strong acid catalyst under nitrogen protection, and heat up to 50-60°C , After reacting for 0.5-1h, remove the small molecule methanol produced by the reaction; then raise the temperature to 70°C, continue the reaction for 4-6h, adjust the pH to 7, control the pressure at 70°C to 5mmHg, and carry out vacuum distillation into the residue No bubbles are obtained containing chloropropyl dihydroxyl-terminated polysiloxane; the resulting chloropropyl-con...

Embodiment 1

[0030] (1) Preparation of dihydroxy-terminated organosilicon quaternary ammonium salt

[0031] 1 mole part of 1,3-bis[3-(1-methoxy-2-hydroxypropoxy)propyl]-tetramethyldisiloxane, 9 mole parts of γ-chloropropylmethyl dimethyl Oxysilane, 21 molar parts of dimethyldimethoxysilane, and 30 molar parts of deionized water were mixed evenly. Under the protection of nitrogen, 0.5 molar parts of trifluoromethanesulfonic acid were added, and the temperature was raised to 50 ° C. After reacting for 1 hour, pumping Remove the small molecule methanol produced by the reaction; then raise the temperature to 70°C, continue the reaction for 4 hours, adjust the pH to 7, and control the pressure at 5mmHg at 70°C to carry out vacuum distillation until there is no bubble in the residue to obtain the chloropropyl-containing dihydroxy-capped product. Terminated polysiloxane; mix the obtained chloropropyl-containing bishydroxyl-terminated polysiloxane with 9 molar parts of dodecyldimethyl tertiary ami...

Embodiment 2

[0037] (1) Preparation of dihydroxy-terminated organosilicon quaternary ammonium salt

[0038] 1 mole part of 1,3-bis[3-(1-methoxy-2-hydroxypropoxy)propyl]-tetramethyldisiloxane, 6 mole parts of γ-chloropropylmethyl dimethyl Oxysilane, 24 mole parts of dimethyldimethoxysilane, and 30 mole parts of deionized water were mixed evenly. Under the protection of nitrogen, 0.5 mole parts of trifluoromethanesulfonic acid was added, and the temperature was raised to 60 ° C. After reacting for 1 hour, pumping Remove the small molecule methanol produced by the reaction; then raise the temperature to 70°C, continue the reaction for 6 hours, adjust the pH to 7, and control the pressure at 5mmHg at 70°C to carry out vacuum distillation until there is no bubble in the residue to obtain the chloropropyl-containing dihydroxy-sealed product. Terminated polysiloxane; the resulting chloropropyl-containing bishydroxyl-terminated polysiloxane is mixed with 6 molar parts of dodecyldimethyl tertiary a...

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Abstract

The invention discloses a method for preparing organosilicon quaternary ammonium salt modified polyurethane resin for a marine antifouling coating. The method comprises the steps of: firstly, preparing double hydroxyl end-organosilicon quaternary ammonium salt from 1,3-bi[3-(1-methoxyl-2-hydroxy propoxy) propyl]-tetramethyl disiloxane, gamma-chlorinated propyl methyl dimethoxy silicone, dimethyl dimethoxy silicone, deionized water and dodecyl dimethyl tertiary amine; then mixing the prepared double hydroxyl end-organosilicon quaternary ammonium salt, the polyether polyol and the diisocyanate in a solvent; adding a curing agent to prepare the organosilicon quaternary ammonium salt modified polyurethane resin for the marine antifouling coating. The organosilicon quaternary ammonium salt modified polyurethane resin prepared by the method is combined with dual effects of low surface energy and killing, and used as the marine antifouling coating film forming matter. Thus, absorption of marine organism can be restrained; the bacteria absorbed at the surface of a ship body can be killed through the quaternary ammonium salt.

Description

technical field [0001] The invention relates to an organosilicon quaternary ammonium salt-modified polyurethane resin for marine antifouling coatings, in particular to a method for preparing an organic silicon type marine antifouling coating resin with both low surface energy and bactericidal properties. Background technique [0002] Vessels or underwater equipment in the ocean will be fouled by marine organisms, which will have a negative impact on their performance and service life. The methods to solve marine biological pollution include mechanical removal, underwater cleaning, coating of marine antifouling coatings, etc., among which the most effective and convenient method is to apply marine antifouling coatings. [0003] At present, marine antifouling coatings can achieve antifouling effect mainly through two methods, one is poisonous killing, which directly kills the marine organisms adsorbed on the surface through toxic substances, and the other is low surface energy...

Claims

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Application Information

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IPC IPC(8): C08G18/61C08G18/48C08G18/12C08G77/388C09D175/08C09D5/16
Inventor 张庆华刘海龙詹晓力陈丰秋
Owner ZHEJIANG UNIV
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