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Polyurea waterproof and corrosion-resistant coating of graphene modified amine-terminated polyether

A waterproof and anti-corrosion coating, amino-terminated polyether technology, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of weakened hydrophilicity of graphene oxide flakes, poor dispersion and chemical bonds, etc., to achieve coagulation Controllable glue time, excellent waterproof and anti-corrosion performance, and slow reaction speed

Inactive Publication Date: 2019-07-19
HANGZHOU GAOXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem in the preparation of graphene by the reduction of the original graphene oxide aqueous solution. The gradual reduction of oxygen-containing groups will cause the weakening of the hydrophilicity of the reduced graphene oxide flakes, which will quickly agglomerate, resulting in some organic phases or polymers. Does not disperse well in the matrix or form stable chemical bonds with organics or polymers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) 45 parts by weight of isocyanate, 35 parts by weight of amino-terminated polyether, and 5 parts by weight of diluent were uniformly mixed and reacted at 65°C to obtain a semi-prepolymer, namely component A;

[0024] (2) Ultrasonic treatment of the single-layer graphene oxide aqueous solution of 1 weight part under ice-water bath conditions until uniformly mixed, the solid NaOH of 600 weight parts and the solid chloroacetic acid of 500 weight parts are added in the graphene oxide aqueous solution and ultrasonic Process and mix evenly to obtain a carboxylated graphene oxide solution; after neutralization with 10wt% hydrochloric acid solution, repeated washing and filtration, purification treatment, the obtained sample was dried in a vacuum oven at 65°C for 24 hours;

[0025] (3) the carboxylated graphene oxide aqueous solution of 1 weight part is ultrasonically dispersed in the DMF solution of 5 parts by weight to form the DMF dispersion liquid of carboxylated graphene...

Embodiment 2

[0032] (1) 45 parts by weight of isocyanate, 35 parts by weight of amino-terminated polyether, and 5 parts by weight of diluent were uniformly mixed and reacted at 65°C to obtain a semi-prepolymer, namely component A;

[0033] (2) The double-layer graphene oxide of 1 weight part and multi-layer graphene oxide aqueous solution are sonicated under the ice-water bath condition until mixing evenly, the solid NaOH of 600 weight parts and the solid chloroacetic acid of 500 weight parts are added to oxidation Graphene aqueous solution and ultrasonic treatment mixed uniformly to obtain carboxylated graphene oxide solution; after neutralization with 10wt% hydrochloric acid solution, after repeated washing and filtration, purification treatment, the obtained sample was dried in a vacuum oven at 65°C for 24 hours;

[0034] (3) the carboxylated graphene oxide aqueous solution of 1 weight part is ultrasonically dispersed in the DMF solution of 1000 weight parts to form the DMF dispersion li...

Embodiment 3

[0041] (1) 45 parts by weight of isocyanate, 35 parts by weight of amino-terminated polyether, and 5 parts by weight of diluent were uniformly mixed and reacted at 65°C to obtain a semi-prepolymer, namely component A;

[0042] (2) The graphene oxide microsphere aqueous solution of 1 weight part is sonicated in the ice-water bath condition until mixing uniformly, the solid NaOH of 600 weight parts and the solid chloroacetic acid of 500 weight parts are added in the graphene oxide aqueous solution and ultrasonic Treat and mix evenly to obtain a carboxylated graphene oxide solution; after being neutralized by 10wt% hydrochloric acid solution, after repeated washing and filtering, the obtained sample is dried in a vacuum oven at 65°C for 24 hours;

[0043] (3) the carboxylated graphene oxide aqueous solution of 1 weight part is ultrasonically dispersed in the DMF solution of 800 weight parts to form the DMF dispersion liquid of carboxylated graphene oxide;

[0044] (4) Add the DMF...

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Abstract

The invention discloses a polyurea waterproof and corrosion-resistant coating of graphene modified amine-terminated polyether. The coating comprises a component A and a component B, wherein the component A is a quasi-prepolymer which is prepared from isocyanate, amine-terminated polyether and a diluent through reactions; the component B is prepared by the following steps: firstly, preparing graphene oxide; secondly, carrying out carboxylation treatment on the graphene oxide; thirdly, carrying out ultrasonic dispersion on the carboxylation graphene oxide into a dimethyl formamide (DMF) solution; under the action of a dehydration agent, modifying the amine-terminated polyether by using the carboxylation graphene oxide; carrying out reduction treatment on the amine-terminated polyether aftercarboxylation graphene oxide modification by using a chemical reduction method; finally, mixing the graphene modified amine-terminated polyether, a chain extender and aids, thereby obtaining the component B. The waterproof and corrosion-resistant coating is simple in process, green and environmentally friendly in process and has the characteristics of being good in waterproof and corrosion-resistant property, good in adhesiveness, slow in reaction speed, controllable in gelation time, and the like.

Description

technical field [0001] The invention belongs to the field of waterproof and anticorrosion materials, and in particular relates to a polyurea waterproof and anticorrosion coating of graphene-modified amino-terminated polyether. Background technique [0002] Corrosion is a phenomenon caused by chemical or electrochemical reactions on the metal interface, which will seriously reduce the mechanical properties of the metal such as strength and toughness, and even cause catastrophic accidents. According to macro survey statistics, the economic loss directly caused by corrosion in my country reaches 3-4% of GDP every year. Coating metals with anti-corrosion coatings can effectively improve the corrosion resistance. Existing waterproof and anticorrosion coatings mainly include polyurethane coatings, acrylate coatings, epoxy resin coatings and polyurea coatings. Among them, due to the rapid reactivity between materials, the traditional polyurea coating has the problem of short gel ...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D5/08C08G18/66C08G18/50C08G18/32
CPCC08G18/3215C08G18/5024C08G18/6685C09D5/08C09D175/02C08K3/042
Inventor 彭闻孙海燕高超
Owner HANGZHOU GAOXI TECH CO LTD
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