Anti-fouling paint

A paint and antifouling technology, applied in the direction of biocide-containing paints, antifouling/underwater coatings, coatings, etc., can solve the problems of low paint film strength, environmental pollution, introduction, etc.

Inactive Publication Date: 2012-10-03
TIANCHANG JULONG TRAVEL PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has achieved a certain anti-fouling effect, but the disadvantage is that the strength of the paint film is low, and the phenomenon of peeling off and separating from the hull surface as a whole occurs from time to time, which instead introduces garbage into the water body and pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Lactic acid polymer A1 was synthesized as follows:

[0038] Into a 1 L separable flask equipped with a thermostat, stirring paddle, nitrogen inlet, Dean-Stark trap, and reflux condenser were charged 22.6 g of trimethylolpropane, 727.4 g of L-lactic acid ( Purac Ltd.), 50 g of toluene and 0.15 g of p-toluenesulfonic acid. In addition, toluene was added to the upper limit of the Dean-Stark trap. Under nitrogen flow, the temperature in the system was raised to 140° C. and maintained for 1 hour. The temperature in the system was further raised to 175°C, and the condensation reaction was continued for 5 hours. After confirming that the acid value of the resin had become not more than 4 mgKOH / g (non-volatile resin), cooling was started. After cooling, butyl acetate was added to adjust the non-volatile content to 80%.

[0039] The obtained lactic acid polymer A1 had an average degree of polymerization of lactic acid of 16 and a hydroxyl value of 46.9 mgKOH / g.

Embodiment 2

[0041] Lactic acid polymer A2 was synthesized as follows:

[0042] Into the same reactor as in Synthesis Example 1, 64.7 g of pentaerythritol, 685.3 g of L-lactic acid (manufactured by Purac Ltd.), 60 g of toluene and 0.15 g of p-toluenesulfonic acid were charged. In addition, toluene was added to the upper limit of the Dean-Stark trap. Under nitrogen flow, the temperature in the system was raised to 140° C. and maintained for 1 hour. The temperature in the system was further raised to 175°C, and the condensation reaction was continued for 5 hours. After confirming that the acid value of the resin had become not more than 4 mgKOH / g (non-volatile resin), cooling was started. After cooling, butyl acetate was added to adjust the non-volatile content to 80%.

[0043] The obtained lactic acid polymer A2 had an average degree of polymerization of lactic acid of 4 and a hydroxyl value of 174.2 mgKOH / g. .

Embodiment 3

[0045] Lactic acid polymer A3 was synthesized as follows:

[0046] Into the same reactor as in Synthesis Example 1, 65.9 g of sorbitol, 684.1 g of L-lactic acid (manufactured by Purac Ltd.), 50 g of toluene and 0.15 g of p-toluenesulfonic acid were charged. In addition, toluene was added to the upper limit of the Dean-Stark trap. Under nitrogen flow, the temperature in the system was raised to 140° C. and maintained for 1 hour. The temperature in the system was further raised to 175°C, and the condensation reaction was continued for 5 hours. After confirming that the acid value of the resin had become not more than 4 mgKOH / g (non-volatile resin), cooling was started. After cooling, butyl acetate was added to adjust the non-volatile content to 80%.

[0047] The obtained lactic acid polymer A3 had an average degree of polymerization of lactic acid of 10 and a hydroxyl value of 198.7 mgKOH / g.

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Abstract

The invention relates to a chemical coating, in particular to an anti-fouling paint which is used in marine facilities. The anti-fouling paint comprises the following components in parts by weight: 55-85 parts of rosin material, 20-60 parts of lactic acid polymer, 15-40 parts of linear addition polymer of olefin unsaturated acid, 5-20 parts of non-polymer plasticizer and 3-15 parts of aquatic organism killing agent. According to the anti-fouling paint, attachment of marine organisms can be effectively prevented without polluting water body, and meanwhile, the paint film has high strength and superior hydrolysis resistance and wear resistance performance.

Description

technical field [0001] The invention relates to chemical coatings, in particular to an antifouling paint used for marine facilities. Background technique [0002] The massive attachment of marine organisms such as barnacles, seaweed, and shellfish to marine facilities can lead to slowdown of ship speed, increase of fuel, corrosion and breakage of ship bottom, drilling platform, buoys, bridge piers, etc., blockage of seawater pipelines and cage nets , has brought a lot of disasters to the process of human development of the ocean. Marine antifouling technology is mainly used to prevent marine organisms from attaching and fouling offshore facilities. The existing methods mainly include: self-polishing antifouling paint based on organotin acrylate, antifouling paint containing plant extracts, low Surface free energy antifouling coatings, antifouling coatings with silicate as antifouling agent, conductive antifouling technology, coatings containing active biological materials, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D193/04C09D167/04C09D133/12C09D133/08C09D5/16C09D5/14C09D7/12
Inventor 孙巨福
Owner TIANCHANG JULONG TRAVEL PAINT
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