Resin for biodegradable anti-fouling paint, synthetic method of the same, and anti-fouling paint composition containing the same

A biological and resin technology, applied in antifouling/underwater coatings, biocide-containing paints, polyurea/polyurethane coatings, etc., can solve the problems of short antifouling period, high raw material price of polymer materials, and seawater immersion resistance No defects and other problems, achieve the effect of low catalyst dosage, low reaction temperature and good reproducibility

Active Publication Date: 2012-05-02
MARINE CHEM RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] At present, there are still biodegradable antifouling coatings: there are no large-scale commercial products of biodegradable polymer materials for biodegradable coatings, and the raw materials for preparing polymer materials are relatively expensive. Most synthetic biodegradable resins are commonly used in antifouling coatings. Poor solubility in solvents, poor control of biodegradation rate, poor resistance to seawater immersion, and short antifouling period, etc. Many problems need to be solved

Method used

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  • Resin for biodegradable anti-fouling paint, synthetic method of the same, and anti-fouling paint composition containing the same
  • Resin for biodegradable anti-fouling paint, synthetic method of the same, and anti-fouling paint composition containing the same
  • Resin for biodegradable anti-fouling paint, synthetic method of the same, and anti-fouling paint composition containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Add 200g lactic acid (containing 85% of the monomer) successively in a 500ml four-necked bottle equipped with a stirring device, a thermometer, a water separator, a condenser tube and a vacuum pump, and 100g toluene and xylene are mixed solvents at a ratio of 1:1. Reflux reaction at 130-140°C, remove water from the water separator until anhydrous is formed, and obtain a yellow polylactic acid prepolymer. Add flexible segment: butanediol 15g and 15g PEG-200, dihydrate stannous dichloride (SnCl2.2H2O) and p-toluenesulfonic acid (TSA) of esterification catalyst 0.2g1: 1, under negative pressure at Reflux reaction at 130-140°C for 10 hours until no water is formed, and a light brown resin is obtained, which is a polylactic acid-based multi-block prepolymer. After cooling, add 80g mixed solvent: xylene and butyl acetate of 1: 1, 45g polyisocyanate is 2: 1 toluene diisocyanate and 1,6-hexamethylene diisocyanate, catalyst dibutyltin dilaurate 0.1g, Heating, stirring and react...

Embodiment 2

[0065]Add 200g lactic acid (content 85%), 100g toluene and xylene 1: 1 mixed solvents successively in the 500ml four-necked bottle that is installed with stirring device, thermometer, water separator, condensing tube and connect vacuum pump, under negative pressure at 130 Reflux reaction at -140°C, remove water from the water separator until no water is formed, and obtain a yellow polylactic acid prepolymer. Add a flexible segment such as 3g propylene glycol, 5g butanediol, 25g PEG-400, a catalyst such as 0.2g of stannous octoate, reflux reaction under the same conditions as in Example 1 for 8 hours until anhydrous is generated, and a light brown resin is obtained, which is poly Lactic acid based multi-block prepolymer. After cooling, add 100g of mixed solvent such as 1:1 butyl acetate and methyl isobutyl ketone, 47g of polyisocyanate such as 1,6-hexamethylene diisoate, 0.1g of dibutyltin dilaurate, heat and stir at 80°C for 4 hours , to obtain the final multi-block biodegrad...

Embodiment 3

[0067] Add 200g of lactic acid (containing 85% of the monomer) and 100g of aromatic solvents such as xylene in a 500ml four-necked bottle equipped with a stirring device, a thermometer, a water separator, and a condenser, and return to the reaction under normal pressure, and the water separator is dewatered. When anhydrous is formed, a light yellow polylactic acid oligomer is obtained. Add a flexible segment such as 10g pentylene glycol, 10g PEG-200, 15g polycaprolactone polyol with a molecular weight of 1000, add a catalyst such as 0.2g tetrabutyl titanate, and reflux at normal pressure for several hours until anhydrous is formed to obtain The light brown resin is polylactic acid-based multi-block prepolymer. After cooling, add 100g of a mixed solvent such as 1:1 xylene and butyl acetate, 50g of polyisocyanate such as toluene diisocyanate, 0.1g of dibutyltin dilaurate into the system, heat and stir at 80°C for 4 hours to obtain the final polyisocyanate. Block biodegradable r...

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Abstract

The invention provides a resin for a biodegradable anti-fouling paint. The resin for the biodegradable anti-fouling paint is a polymer containing a multi-block structure, characterized in that: the resin is prepared by polymerizing by polylactic acid oligomer, flexible segments, polyisocyanates under the effect of catalysts, wherein, the polylactic acid oligomer is prepared by carrying out reflux reaction on lactic acid having a monomer content of 80-85 % and aromatic solvents under negative pressure or normal pressure until no water generates; the flexible segments comprises polyols or / and polyester polyols; and the amount of the flexible segments accounts for 5-30 % of the weight percentage of the lactic acid raw material; and the amount of polyisocyanates accounts for 10-30 % of the weight percentage of the lactic acid raw material. The invention further provides a biodegradable anti-fouling paint composition containing the resin as a matrix resin. The anti-fouling paint contains composite organic antifouling agent and contains no or little cuprous oxide, and has the advantages of low toxicity, environmental protection, and good anti-fouling effect.

Description

technical field [0001] The invention relates to a resin for biodegradable antifouling paint and a synthesis method thereof, a biodegradable antifouling paint composition containing the resin and a preparation method, belonging to the technical field of polymer materials. Background technique [0002] With the implementation of the "International Convention on the Control of Harmful Anti-fouling Systems of Ships" (AFS Convention) and the "Stockholm Convention on Persistent Organic Pollutants" (POPs Convention), antifouling coatings containing organotin and DDT have been completely withdrawn from the market. The production of antifouling coatings is developing in the direction of no heavy metals, no tin, low copper, and no fungicides. It is imperative to research and develop eco-friendly antifouling coatings. Self-polishing antifouling coatings are a development direction, but there are still some problems: [0003] (1) The current mainstream self-polishing antifouling coati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/42C09D175/06C09D5/16
Inventor 余浩杰桂泰江于雪艳陈正涛肖玲王科张华庆
Owner MARINE CHEM RES INST CO LTD
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