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High-temperature-resistant single-component polyurethane coating and preparation method thereof

A polyurethane coating, a single-component technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, fire-resistant coatings, etc., can solve the problems of poor high temperature resistance, expensive modification, etc., to achieve convenient construction, reduce surface drying time, The effect of low viscosity

Inactive Publication Date: 2019-04-12
长沙盾甲新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of high-temperature-resistant single-component polyurethane coating and its preparation method in order to overcome the problems of poor high-temperature resistance and relatively expensive modification of polyurethane coatings in the prior art. Advantages of abrasion and corrosion resistance

Method used

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  • High-temperature-resistant single-component polyurethane coating and preparation method thereof
  • High-temperature-resistant single-component polyurethane coating and preparation method thereof

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preparation example Construction

[0032] In a second aspect, the present invention provides a method for preparing a high-temperature-resistant single-component polyurethane coating, comprising the following steps:

[0033] (1) Add polyester polyol into the reaction kettle, heat to 100-120°C, vacuum dehydrate for 1-2h, cool to room temperature and fill with nitrogen to store for later use;

[0034] (2) adding isocyanate into the reaction kettle, stirring and heating, raising the temperature to 60-90°C, and reacting for 2-5h;

[0035] (3) Add end-capped amino resin, stir and keep at 60-90°C for 1-2h, then add fillers, additives and solvents under stirring, stir and disperse for 0.2-1h, discharge and seal for storage, to obtain the high-temperature-resistant single-group Divided polyurethane coating;

[0036] The mass percent of above-mentioned component is:

[0037]

[0038] In the present invention, 4,4'-diphenylmethane diisocyanate, polymethylene polyphenyl polyisocyanate, diphenylmethane diisocyanate, t...

Embodiment 1

[0041] (1) Add 22 parts by mass of polyethylene adipate into the reaction kettle, heat to 110° C., vacuum dehydrate for 1 hour, cool to room temperature and store with nitrogen gas for later use;

[0042] (2) Add 13 parts by mass of toluene diisocyanate into the reaction kettle, stir and heat, raise the temperature to 75°C, and react for 3.5 hours;

[0043] (3) Add 8 parts by mass of salicylaldimine, stir and insulate for 1.5h, then add 7 parts by mass of aluminum oxide and 50 parts by mass of xylene under stirring, stir and disperse for 0.5h, then discharge and seal for preservation, and obtain the described High temperature resistant one-component polyurethane coating.

Embodiment 2

[0045] (1) Add 8 parts by mass of polyethylene adipate and 10 parts by mass of polyethylene adipate-propylene glycol into the reaction kettle, heat to 105°C, vacuum dehydrate for 1.5h, cool to room temperature and Filled with nitrogen to save for later use;

[0046](2) Add 5 parts by mass of 4,4'-diphenylmethane diisocyanate and 5 parts by mass of hexamethylene diisocyanate into the reaction kettle, stir and heat, raise the temperature to 70°C, and react for 4 hours;

[0047] (3) Add 7 parts by mass of N, N'-(methyl-butylmethylene)-diethylenetriamine, stir and insulate for 1.5h, then add 5 parts by mass of chopped glass fiber and 30 parts by mass under stirring Parts by mass of acetone and 30 parts by mass of ethyl acetate were stirred and dispersed for 0.3 h, and then discharged and sealed for storage to obtain the high-temperature-resistant one-component polyurethane coating.

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Abstract

The invention relates to the field of polyurethane coatings, and discloses a high-temperature-resistant single-component polyurethane coating and a preparation method thereof. The coating comprises the following components: 15-30 wt% of a polymer polyol, 7-20 wt% of isocyanate, 5-13 wt% of blocked amino resin, 2-15 wt% of a filler and 30-70 wt% of a solvent. The preparation method comprises the following steps: (1) adding the polyester polyol into a reaction kettle, performing heating to 100-120 DEG C, performing vacuum dehydration for 1-2 h, performing cooling to room temperature, and introducing nitrogen for storage for standby application; (2) adding the isocyanate into the reaction kettle, performing stirring, performing heating to 60-90 DEG C, and performing a reaction for 2-5 h; and(3) adding the blocked amino resin, performing stirring, performing heat preservation for 1-2 h, then adding the filler, an auxiliary agent and the solvent under stirring, performing dispersion for 0.2-1 h under stirring, discharging the coating, and performing seal storage. Compared with ordinary single-component polyurethane, the product provided by the invention has higher mechanical strength,a more compact film, and better wear resistance and corrosion resistance.

Description

technical field [0001] The invention relates to the field of polyurethane coatings, in particular to a high-temperature-resistant single-component polyurethane coating and a preparation method thereof. Background technique [0002] Polyurethanes are made by reacting polyols with isocyanates. Due to the characteristics of expandability, elasticity, abrasion resistance, adhesion, low temperature resistance, solvent resistance and biological aging resistance, it is widely used. It is a polymer material that develops very rapidly. However, due to the linear structure of polyurethane, the temperature resistance of polyurethane is generally not high, and ordinary polyurethane cannot be used at high temperatures, such as high-temperature coatings, electronic and electrical packaging, high-temperature decorative embossing of polyurethane synthetic leather, high-temperature-resistant polyurethane insulation, etc. Therefore, It must be modified. [0003] At present, there are many ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D175/04C09D5/18C09D5/08C09D7/61C08G18/42C08G18/44C08G18/30
CPCC08G18/287C08G18/4238C08G18/4277C08G18/44C08K2003/2227C08L2205/16C09D5/08C09D5/18C09D7/61C09D7/70C09D175/04C09D175/06C08K3/22C08K7/14C08K7/06C08L77/10
Inventor 雷静裘航盛
Owner 长沙盾甲新材料科技有限公司
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