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Self-repairing coating system

A self-repairing and systematic technology, applied in coatings, conjugated diene coatings, polyester coatings, etc., can solve the problems of easy peeling failure, low mechanical strength, coating failure, etc., and achieve high mechanical performance retention rate, The effect of convenient construction and fast sealing speed

Active Publication Date: 2018-12-04
SHANDONG NON METALLIC MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The characteristic of the viscous gel disclosed in this patent is that the viscosity at 25°C measured by a rotational rheometer AR2000Rheometer is 600Pa·s. However, the mechanical strength of the composite coating intermediate coating is too low, it is easy to peel off and fail, and the viscosity of the viscous gel coating is too low under long-term sunlight exposure, which will cause the coating to fail

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] After mixing and stirring 20 parts of lauryl acrylate, 20 parts of methyl methacrylate, 16 parts of styrene and 7.5 parts of hydroxyethyl acrylate, add 32 parts of ethyl acetate and 1 part of initiator BPO, stir and dissolve to obtain a mixture The mixture is divided into two parts of equal mass, one part is placed in a three-diameter bottle, and the other part is placed in a constant pressure dropping funnel, nitrogen is passed through to remove oxygen, and the reaction is initiated at 75 ° C for 5 hours under stirring conditions, and the constant pressure is controlled. The liquid in the pressure drop funnel was dropped into a three-way bottle within 2 hours at a constant temperature of 75°C, kept at 75°C for 3 hours, cooled naturally to room temperature, and the solvent was removed under reduced pressure to obtain a hydroxystyrene-acrylic ester copolymer, styrene The component content is 25.2%, and the hydroxyl content is 1.7%.

[0018] Mix 100 parts of hydroxy-conta...

Embodiment 2

[0023] The composition of the copolymer material is 40 parts of lauryl acrylate, 23 parts of butyl acrylate, 5 parts of styrene, 8.5 parts of hydroxyethyl acrylate, 38 parts of ethyl acetate, and 1.3 parts of initiator AIBN. Initiate the reaction within 1 hour, add dropwise at 75°C for 2h, react at 75°C for 3.5h, cool naturally to room temperature, add polyether polyol (WANOL C2004) 30 parts were mixed, evaporated under reduced pressure, and the solvent was completely volatilized to obtain a styrene-acrylate copolymer-polyether blended resin. The styrene content of the copolymer was 6.5%, and the hydroxyl content was 1.6%. The mass of polyether resin is 39.2% of the mass of copolymer.

[0024] Mix 100 parts of hydroxystyrene-acrylic ester-polyether blend resin, 0.1 part of dibutyltin dilaurate, 2 parts of rheology modifier Thixatrol Max, and 5 parts of 300-mesh styrene-butadiene rubber particles, and mix them uniformly as component A; The equivalent ratio of active hydrogen...

Embodiment 3

[0029] The composition of the copolymer material is: 37 parts of lauryl acrylate, 25 parts of methyl methacrylate, 16 parts of styrene, 7.5 parts of a 1:1 mixture of hydroxypropyl acrylate and hydroxyethyl acrylate, 43 parts of ethyl acetate, and an initiator 1.3 parts of AIBN, the synthesis method is the same as that in Example 1, the reaction is initiated at 80°C for 4 hours, added dropwise at 80°C for 1 hour, and reacted at 75°C for 3 hours.

[0030] Naturally cool to room temperature, add polyester polyol (Covestro Desmophen 670) and polyether polyol (Wanhua WANOL C2004) 25 parts of 1:1 mixture were mixed, evaporated under reduced pressure, and the solvent was completely evaporated to obtain styrene-acrylate copolymer-polyether-polyester blended resin. The styrene content of the copolymer is 18.7%, and the hydroxyl content is 1.2%. The mass of the mixture of polyether and polyester resin is 29.2% of the mass of the copolymer.

[0031] Take 100 parts of styrene-acrylat...

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Abstract

The invention belongs to the technical field of protection. An elastomer, which is prepared through co-curing between styrene-acrylate copolymer that contains hydroxyl groups and is well compatible with fuel oil and polyester and / or polyurethane, is taken as the middle coating. Through resilience and oil-absorbing swelling, holes can be rapidly blocked. The invention relates to a self-repairing coating system, which has a multi-coating composite structure and at least comprises a middle coating and a polyurethane elastomer / polyurea outer coating. The middle coating is a hydroxyl-containing styrene-acrylate copolymer-polyurethane elastomer, the styrene accounts for 6.5 to 25.2 wt.% of the hydroxyl-containing styrene-acrylate copolymer, and the thickness of the middle coating is not less than 1.5 mm. The provided self-repairing coating system has good mechanical properties, is convenient to construct, has the advantages of wide application range, quick blocking speed, good effect, and high strength maintaining rate, can be used to block holes or cracks of an oil storing container in time, and is especially suitable for preventing the leakage, when a fuel oil container is broken downor a crack or hole appears in the interior of a high pressure oil storage container.

Description

technical field [0001] The invention belongs to the technical field of protection, and relates to a self-repairing technology for coating perforation, in particular to a rapid repairing technology for perforation of an oil storage container. Background technique [0002] The fuel tank is an indispensable component in the power system of a motor vehicle. In a war environment, using light weapons to attack equipment fuel tanks, oil tanks for refueling vehicles, and fixed storage tanks has become a tactical means with high cost-efficiency, high damage rate, and high added value. , which poses a serious threat to the safety of equipment and materials. [0003] CN104110814A discloses a self-healing coating system for use with fuel tanks, the invention relates to a coating system deposited on at least a portion of a substrate, the coating system comprising an interior coating composition, including polyurea, deposited on at least a portion of the substrate or a polyurethane coati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D175/02C09D171/00C09D167/00C09D123/16C09D109/06C09D175/08C09D175/06
CPCC09D167/00C09D171/00C09D175/02C09D175/04C09D175/06C09D175/08C08L23/16C08L9/06
Inventor 张岩侯瑞李明俊周桂明马晓斌吴炅段衍鹏刘景李桂群
Owner SHANDONG NON METALLIC MATERIAL RES INST
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