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Graphene-fluorine modified waterborne polyurethane resin and preparation method thereof

A water-based polyurethane and graphene technology, applied in antifouling/underwater coatings, coatings, paints containing biocides, etc., can solve the problems of high surface tension and difficulty in adapting to special coating applications, and achieve low surface tension, Excellent gloss and color retention performance, satisfying anti-static effect

Active Publication Date: 2017-06-13
UNION FOSHAN CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emulsion of the prepared composite material is uniform and stable, and the cured film has good mechanical properties, but its surface tension is large, which makes it difficult to adapt to the application of special coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of graphene-fluorine modified waterborne polyurethane resin, its preparation process is as follows:

[0033] a. In a four-port reactor equipped with a thermometer, a condenser, and an agitator, 5.0 parts of polytetrahydrofuran polyol, 2.0 parts of butanediol, 0.8 parts of graphene, 1.5 parts of glycerin, and dihydroxy 2.0 parts of methylpropionic acid, heated to 95-110°C for vacuum dehydration for 1.5-2.0 hours;

[0034] b. Add 12.0 parts of toluene diisocyanate dropwise under the condition of cooling down to 60-70°C, and complete the dropwise addition within 0.5-1 hour; then add 0.04 parts of dibutyltin dilaurate dropwise, and raise the temperature to 80-82°C for 2-2.5 hours, Add 4.0 parts of acetone depending on the viscosity of the system; drop the temperature to 65°C, add 3.0 parts of hydroxyethyl acrylate dropwise, continue the reaction for 1-2 hours, measure the NCO value, and stop the reaction when the measured NCO value is close to the theoretical design ...

Embodiment 2

[0039] A kind of graphene-fluorine modified waterborne polyurethane resin, its preparation process is as follows:

[0040] a. In a four-port reactor equipped with a thermometer, a condenser, and an agitator, add 5.0 parts of polytetrahydrofuran polyol, 2.2 parts of butanediol, 0.9 parts of graphene, and 2.0 parts of trimethylolpropane in sequence according to the weight percentage of the formula. Parts, 2.0 parts of dimethylolpropionic acid, heated to 95-110°C for vacuum dehydration for 1.5-2.0 hours;

[0041] b. Add 14.0 parts of isophorone diisocyanate dropwise under the condition of cooling down to 60-70°C, and the dropwise addition is completed within 0.5-1 hour; 2.5 hours, add 5.0 parts of acetone depending on the viscosity of the system; drop the temperature to 65°C, add 3.5 parts of hydroxypropyl methacrylate dropwise, continue the reaction for 1-2 hours, measure the NCO value, and stop the reaction when the measured NCO value is close to the theoretical design value; ...

Embodiment 3

[0046] A kind of graphene-fluorine modified waterborne polyurethane resin, its preparation process is as follows:

[0047] a. In a four-port reactor equipped with a thermometer, a condenser, and an agitator, add 6.0 parts of polytetrahydrofuran polyol, 3.0 parts of butanediol, 1.0 parts of graphene, and 1.5 parts of trimethylolpropane in sequence according to the weight percentage of the formula Parts, 2.0 parts of dimethylolpropionic acid, heated to 95-110°C for vacuum dehydration for 1.5-2.0 hours;

[0048] b. Add 18.0 parts of hexamethylene diisocyanate dropwise under the condition of cooling down to 60-70°C, and the dropwise addition is completed within 0.5-1 hour; 2.5 hours, add 6.0 parts of acetone depending on the viscosity of the system; drop the temperature to 65°C, add 4.0 parts of hydroxypropyl methacrylate dropwise, continue the reaction for 1-2 hours, measure the NCO value, and stop the reaction when the measured NCO value is close to the theoretical design value;...

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PUM

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Abstract

The invention relates to graphene-fluorine modified waterborne polyurethane resin which is prepared through chemical reaction of polyisocyanate, polyhydric alcohol, a polyamine chain extender, oligomer polyhydric alcohol, dimethylolpropionic acid, graphene, hydroxy acrylic acid, fluoroalkene monomer, acrylic acid monomer, a neutralizing agent and deionized water. The invention also provides a preparation method of graphene-fluorine modified waterborne polyurethane resin. The prepared graphene-fluorine modified waterborne polyurethane resin has good properties of adhesion, stain resistance, high hardness, corrosion resistance, durability, hydrophobicity, static resistance, self cleaning and the like and can be applied to single-component waterborne coating, dual-component waterborne coating and normal-temperature curing coating and is widely applied to waterborne wood coating, waterborne industrial coating, waterborne antifouling coating, waterborne anticorrosion coating, waterborne antistatic coating and waterborne special engineering coating such as wind power generation, nuclear power and marine coating.

Description

technical field [0001] The invention relates to a preparation method of a modified waterborne polyurethane resin, in particular to a graphene-fluorine modified waterborne polyurethane resin with extremely low surface tension and good hydrophobic, antifouling and antistatic functions, belonging to the technical field of synthetic resins. Background technique [0002] At present, the surface treatment agent that acts on the surface of plastic, wood, metal, etc. for anti-fouling and waterproof treatment, due to the uneven dispersion of the coating surface and excessive surface tension after application, this makes the surface of the substrate coating easily polluted and difficult to clean , so low surface energy hydrophobic coatings have received extensive attention in the field of scientific research. [0003] Polyurethane is mainly formed by the reaction of alcohol and isocyanate. The reaction raw materials and process factors have a great influence on the shape of polyuretha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/14C08F220/22C08F220/18C08G18/76C08G18/75C08G18/73C08G18/67C08G18/66C08G18/48C08G18/34C08G18/32C08G18/30C09D151/08C09D5/16C09D5/24
CPCC08F283/008C08G18/30C08G18/348C08G18/4854C08G18/6674C08G18/6677C08G18/6685C08G18/6692C08G18/672C08G18/73C08G18/755C08G18/7614C09D5/1662C09D5/24C09D151/08C08F220/14C08F220/22C08F220/18
Inventor 张武许钧强康伦国姚东生
Owner UNION FOSHAN CHEM
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