Organosilicon type marine antifouling paint binder and preparation method and application thereof

Abstract

The invention discloses organosilicon type marine antifouling paint binder. The structure of the paint binder is shown in the formula (1), wherein the paint binder is an organosilicon-polyurethane compound with bactericide side chain and R represents CH2CH3. The preparation method comprises the following preparation steps: 1) using chloropropylmethyldimethoxysilane and dimethyldimethoxysilicane to react and obtain chloropropyl-containing polysiloxane; 2) using chloropropyl-containing polysiloxane, tertiary amine and hydroxyl-containing tertiary amine to perform reflux reaction and generate polysiloxane with quaternary ammonium salt and hydroxyl; and 3) mixing isocyanate, butyltin dilaurate and polysiloxane with quaternary ammonium salt and hydroxyl with solvent, adding gamma-aminopropyltriethoxysilane to extend the chain and obtain prepolymer with the crosslinked group -Si(OCH2CH3), and using the prepolymer to perform crosslinking and condensation in the air and obtain the finished product. The organosilicon type binder has low surface energy performance and very good hydrophobicity; and the molecular chain has environmentally-friendly bactericide, thus the binder has very good bactericidal effect and marine antifouling effect.

Description

technical field

[0001] The invention relates to a marine antifouling paint, in particular to an organosilicon type marine antifouling paint base material with low surface energy and bactericidal properties, as well as its preparation method and application. Background technique

[0002] Marine pollution refers to the pollution caused by the accumulation of marine organisms on the bottom of ships or artificial underwater facilities such as buoys, which will bring about species invasion, increase the resistance of the ship's hull, increase fuel consumption, and increase the frequency of docking of ships. influence, but also has a great influence on the military. Among the many ways to prevent marine pollution, spraying marine antifouling paint is the most economical and effective method.

[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...

Examples

Embodiment 1

[0027] 1) Add 30g of dimethyldimethoxysilane, 68.47g of chloropropylmethyldimethoxysilane, 0.15g of solid acid clay, 5g of water into a 250ml three-necked flask, hydrolyze and polymerize for 3 hours at 80°C, and filter Remove acid clay, distill off water and methanol to obtain chloropropyl polysiloxane;

[0028] 2) Add 10g of chloropropyl polysiloxane synthesized in step (1) into a 250ml three-necked flask equipped with a reflux condenser, a stirring device, and a thermometer, add 50ml of n-butanol, 9.5g of tertiary dodecylamine and 1.06g of N methyldiethanolamine, under the protection of nitrogen, reflux reaction at 120°C for 10h, after the reaction was completed, the solvent was distilled off under reduced pressure to obtain polysiloxane containing quaternary ammonium salt and hydroxyl group. The content of quaternary ammonium salt is determined by cationic titration, the indicator is methylene blue, and the quaternization yield is 99%;

[0029] 3) Add the polysiloxane cont...

Embodiment 2

[0031] 1) Add 30g of dimethyldimethoxysilane, 45.50g of chloropropylmethyldimethoxysilane, 0.15g of solid acid clay, 5g of water into a 250ml three-neck flask, conduct a hydrolysis polymerization reaction at 80°C for 3 hours, and remove by filtration Acid clay, water and methanol are distilled off to obtain chloropropyl polysiloxane;

[0032] 2) Add 10g of chloropropyl polysiloxane synthesized in step (1) into a 250ml four-necked flask equipped with a reflux condenser, a stirring device, and a thermometer, add 50ml of n-butanol, and 8.10g of tertiary dodecylamine And 1.13g N methyldiethanolamine, under the protection of nitrogen, reflux reaction at 120°C for 10h, after the reaction was completed, the solvent was distilled off under reduced pressure to obtain polysiloxane containing quaternary ammonium salt and hydroxyl group. The content of quaternary ammonium salt is determined by cationic titration, the indicator is methylene blue, and the quaternization yield is 99%;

[00...

Embodiment 3

[0035] 1) Add 30g of dimethyldimethoxysilane, 30.43g of chloropropylmethyldimethoxysilane, 0.15g of acid clay, 5g of water into a 250ml three-neck flask, hydrolyze and polymerize for 3 hours at 80°C, and remove the acid by filtration White clay, water and methanol are distilled off to obtain chloropropyl polysiloxane;

[0036] 2) Add 10g of chloropropyl polysiloxane synthesized in step (1) into a 250ml four-neck flask equipped with a reflux condenser, a stirring device and a thermometer, add 50ml of n-butanol, and 6.45g of tertiary dodecylamine and 1.20 g of N methyldiethanolamine, under the protection of nitrogen, reflux at 120° C. for 10 h. After the reaction, the solvent was distilled off under reduced pressure to obtain a polysiloxane containing a quaternary ammonium salt and a hydroxyl group. The content of quaternary ammonium salt is determined by cationic titration, the indicator is methylene blue, and the quaternization yield is 99%;

[0037] 3) Add the polysiloxane c...

technical field

[0001] The invention relates to a marine antifouling paint, in particular to an organosilicon type marine antifouling paint base material with low surface energy and bactericidal properties, as well as its preparation method and application. Background technique

[0002] Marine pollution refers to the pollution caused by the accumulation of marine organisms on the bottom of ships or artificial underwater facilities such as buoys, which will bring about species invasion, increase the resistance of the ship's hull, increase fuel consumption, and increase the frequency of docking of ships. influence, but also has a great influence on the military. Among the many ways to prevent marine pollution, spraying marine antifouling paint is the most economical and effective method.

[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...

Examples

Embodiment 1

[0027] 1) Add 30g of dimethyldimethoxysilane, 68.47g of chloropropylmethyldimethoxysilane, 0.15g of solid acid clay, 5g of water into a 250ml three-necked flask, hydrolyze and polymerize for 3 hours at 80°C, and filter Remove acid clay, distill off water and methanol to obtain chloropropyl polysiloxane;

[0028] 2) Add 10g of chloropropyl polysiloxane synthesized in step (1) into a 250ml three-necked flask equipped with a reflux condenser, a stirring device, and a thermometer, add 50ml of n-butanol, 9.5g of tertiary dodecylamine and 1.06g of N methyldiethanolamine, under the protection of nitrogen, reflux reaction at 120°C for 10h, after the reaction was completed, the solvent was distilled off under reduced pressure to obtain polysiloxane containing quaternary ammonium salt and hydroxyl group. The content of quaternary ammonium salt is determined by cationic titration, the indicator is methylene blue, and the quaternization yield is 99%;

[0029] 3) Add the polysiloxane cont...

Embodiment 2

[0031] 1) Add 30g of dimethyldimethoxysilane, 45.50g of chloropropylmethyldimethoxysilane, 0.15g of solid acid clay, 5g of water into a 250ml three-neck flask, conduct a hydrolysis polymerization reaction at 80°C for 3 hours, and remove by filtration Acid clay, water and methanol are distilled off to obtain chloropropyl polysiloxane;

[0032] 2) Add 10g of chloropropyl polysiloxane synthesized in step (1) into a 250ml four-necked flask equipped with a reflux condenser, a stirring device, and a thermometer, add 50ml of n-butanol, and 8.10g of tertiary dodecylamine And 1.13g N methyldiethanolamine, under the protection of nitrogen, reflux reaction at 120°C for 10h, after the reaction was completed, the solvent was distilled off under reduced pressure to obtain polysiloxane containing quaternary ammonium salt and hydroxyl group. The content of quaternary ammonium salt is determined by cationic titration, the indicator is methylene blue, and the quaternization yield is 99%;

[00...

Embodiment 3

[0035] 1) Add 30g of dimethyldimethoxysilane, 30.43g of chloropropylmethyldimethoxysilane, 0.15g of acid clay, 5g of water into a 250ml three-neck flask, hydrolyze and polymerize for 3 hours at 80°C, and remove the acid by filtration White clay, water and methanol are distilled off to obtain chloropropyl polysiloxane;

[0036] 2) Add 10g of chloropropyl polysiloxane synthesized in step (1) into a 250ml four-neck flask equipped with a reflux condenser, a stirring device and a thermometer, add 50ml of n-butanol, and 6.45g of tertiary dodecylamine and 1.20 g of N methyldiethanolamine, under the protection of nitrogen, reflux at 120° C. for 10 h. After the reaction, the solvent was distilled off under reduced pressure to obtain a polysiloxane containing a quaternary ammonium salt and a hydroxyl group. The content of quaternary ammonium salt is determined by cationic titration, the indicator is methylene blue, and the quaternization yield is 99%;

[0037] 3) Add the polysiloxane c...

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