Graphene-organosilicon modified waterborne polyurethane resin

A technology of water-based polyurethane and graphene, which is applied in the preparation of modified water-based polyurethane resin and the field of graphene-organosilicon modified water-based polyurethane resin, which can solve the problems of aging resistance, poor hydrolysis resistance, poor acid and alkali resistance, and high insulation. problems, to achieve the effect of great application potential, low VOC content and good adhesion

Inactive Publication Date: 2017-05-10
康伦国
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is widely used in the fields of coatings, adhesives, foam plastics, inks and rubbers. Polyurethane can be divided into polyester type and polyether type according to the difference of oligomer polyols. Under outdoor exposure conditions, these two types of polyurethane The aging resistance and hydrolysis resistance of the resin are relatively poor
At the same time, polyurethane also has problems such as poor impact resistance, easy foaming when exposed to moisture, and poor acid and alkali resistance. General polyurethane has high insulation and is prone to static electricity, which limits its application in special fields.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of graphene-organosilicon modified waterborne polyurethane resin, its preparation process is as follows:

[0026] a. In a four-port reactor equipped with a thermometer, a condenser, and an agitator, add 3.0 parts of butanediol, 1.5 parts of trimethylolpropane, 1.5 parts of graphene, and polytetrahydrofuran polyol in sequence according to the weight percentage of the formula 6.0 parts, 2.6 parts of dimethylol propionic acid, heated to 95-110°C for vacuum dehydration for 1.5-2.0 hours;

[0027] b. Cool down to 60-70°C, add 2.0 parts of polydimethylsiloxane terminated by hydroxyl polyether, dropwise add 16.0 parts of hexamethylene diisocyanate, and finish dropping within 0.5-1h; then add dilauric acid dropwise 0.05 parts of dibutyltin, heat up to 80-82°C and react for 2-2.5 hours, add 6.0 parts of acetone, measure the NCO value, stop the reaction when the measured value is close to the theoretical design value;

[0028] c. Continue to stir to lower the temperature ...

Embodiment 2

[0030] A kind of graphene-organosilicon modified waterborne polyurethane resin, its preparation process is as follows:

[0031] a. In a four-port reactor equipped with a thermometer, a condenser, and an agitator, according to the weight percentage of the formula, 3.5 parts of butanediol, 2.5 parts of glycerin, 1.5 parts of graphene, 7.0 parts of polytetrahydrofuran polyol, two 2.8 parts of hydroxymethylpropionic acid, heated to 95-110°C for vacuum dehydration for 1.5-2.0 hours;

[0032] b. Cool down to 60-70°C, add 2.2 parts of hydroxyl-terminated polydimethylsiloxane, add 18.0 parts of isophorone diisocyanate dropwise, and finish adding dropwise within 0.5-1 hour; then add dibutyltin dilaurate dropwise 0.05 parts, heat up to 80-82 ° C for 2-2.5 hours, add 7.0 parts of acetone, measure the NCO value, stop the reaction when the measured value is close to the theoretical design value;

[0033] c. Continue to stir to lower the temperature below 40°C, slowly add 2.1 parts of neut...

Embodiment 3

[0035] A kind of graphene-organosilicon modified waterborne polyurethane resin, its preparation process is as follows:

[0036] a. In a four-port reactor equipped with a thermometer, a condenser, and an agitator, according to the weight percentage of the formula, 3.2 parts of neopentyl glycol, 1.2 parts of trimethylolpropane, 1.6 parts of graphene, and polytetrahydrofuran 5.5 parts of alcohol, 2.4 parts of dimethylolpropionic acid, heated to 95-110°C for vacuum dehydration for 1.5-2.0 hours;

[0037] b. Cool down to 60-70°C, add 2.5 parts of hydroxyl-terminated polydimethylsiloxane, dropwise add 15.0 parts of toluene diisocyanate, and finish adding dropwise in 0.5-1 hour; then add dropwise 0.05 part of dibutyltin dilaurate, and heat up React at 80-82°C for 2-2.5 hours, add 6.5 parts of acetone, measure the NCO value, and stop the reaction when the measured value is close to the theoretical design value;

[0038] c. Continue stirring to lower the temperature below 40°C, slowly a...

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PUM

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Abstract

The invention relates to graphene-organosilicon modified waterborne polyurethane resin. The graphene-organosilicon modified waterborne polyurethane resin is prepared from polyisocyanate, polyol, a polyamine chain extender, oligomeric polyol, dimethylolpropionic acid, organosilicon, dibutyltin dilaurate, graphene, acetone, a neutralizing agent and deionized water through a reaction. The invention provides the graphene-organosilicon modified waterborne polyurethane resin and a preparation method thereof. The graphene-organosilicon modified waterborne polyurethane resin prepared by using the method provided by the invention can be prepared into a one-component waterborne coating, a two-component waterborne coating and a normal-temperature curing coating, has good performances like adhesion force, corrosion resistance, water resistance, alkali resistance, wear resistance, electrostatic resistance and high hardness, is extensively applied to ocean fields, iron components, woodware coatings, antistatic coatings, electric-conductive coatings and antifouling and waterproofing coatings, and has great application potentials.

Description

technical field [0001] The invention relates to a preparation method of a modified waterborne polyurethane resin, in particular to a graphene-organosilicon modified waterborne polyurethane resin, which belongs to the technical field of waterborne resin synthesis. Background technique [0002] Polyurethane is formed by the reaction of oligomer polyols, small molecule polyols, polyisocyanates and chain extenders. Oligomer polyols provide soft segments, and polyisocyanates provide hard segments. This combination of soft and hard structures makes Polyurethane has both high elasticity and high hardness. Polyurethane also has good solvent resistance, abrasion resistance and flex resistance. Therefore, it is widely used in the fields of coatings, adhesives, foam plastics, inks and rubbers. Polyurethane can be divided into polyester type and polyether type according to the difference of oligomer polyols. Under outdoor exposure conditions, these two types of polyurethane The aging ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/34C08G18/32C08G18/61C08G18/12C08K3/04
CPCC08G18/6692C08G18/12C08G18/3206C08G18/348C08G18/4854C08G18/61C08G18/6674C08K3/04C08G18/3228
Inventor 康伦国
Owner 康伦国
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