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Polycarbonate resin for elastic hand paint and preparation method thereof, and elastic hand paint

A technology of polycarbonate resin and hand paint, applied in polycarbonate coatings, coatings, etc., can solve problems such as high hardness, poor elasticity, and weak weather resistance

Active Publication Date: 2022-07-05
东莞市左镕工实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of preparing polycarbonate resins from these saturated dihydric alcohols are poor elasticity, relatively weak weather resistance, high freezing point and high hardness. Application in Elastic Touch Paint

Method used

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  • Polycarbonate resin for elastic hand paint and preparation method thereof, and elastic hand paint
  • Polycarbonate resin for elastic hand paint and preparation method thereof, and elastic hand paint
  • Polycarbonate resin for elastic hand paint and preparation method thereof, and elastic hand paint

Examples

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preparation example Construction

[0028] The present invention also provides a preparation method of the polycarbonate resin, the preparation steps comprising:

[0029] (1) 40-60 parts of propylene carbonate, 20-30 parts of 1, 4 butanediol, 10-20 parts of 3-methyl-1, 5-pentanediol, 20-40 parts of butane ethylene glycol, 0.1-0.5 part of antioxidant and 0.02-0.1 part of catalyst are put into the reaction kettle, and the temperature is raised;

[0030] (2) the reaction kettle material is heated to 240-250 ℃, and the reaction kettle distillation column top temperature is not higher than 196 ℃ to steam out the reaction by-products 1 and 2 propylene glycol, along with the by-products 1 and 2 propylene glycol steam, the reaction kettle is raised internal temperature;

[0031] (3) when the temperature of material in the reactor is kept at 250 ℃, and start to lead nitrogen in the reactor, the reaction times is 20-30 hours, and when the temperature of the top of the rectifying column drops to 190 ℃, underpressure disti...

Embodiment 1

[0039] In parts by weight, the raw materials for preparing the polycarbonate resin for elastic touch paint include:

[0040] 40 parts of propylene carbonate;

[0041] 1. 20 parts of 4-butanediol;

[0042] 30 parts of butylene glycol;

[0043] 20 parts of 3-methyl-1,5-pentanediol;

[0044] 0.02 part of sodium methoxide;

[0045] 2.6 Di-tert-butyl-4-methylphenol 0.4 part.

[0046] Using the above-mentioned raw materials to prepare polycarbonate resin for elastic hand-feel paint, the preparation method includes:

[0047] (1) 40 parts of propylene carbonate, 20 parts of 1, 4 butanediol, 20 parts of 3-methyl-1, 5-pentanediol, 30 parts of butene diol, 0.4 parts of 2 , 6 di-tert-butyl-4-methylphenol and 0.02 part of sodium methoxide drop into the reactor, and heat up;

[0048] (2) The temperature of the reaction kettle material is raised to 240-250°C, and the reaction kettle distillation column top temperature is not higher than 196°C to steam out the reaction by-products 1 and...

Embodiment 2

[0051] This example is basically the same as the raw material for preparing polycarbonate resin for elastic hand paint in Example 1, the difference is that the catalyst used in Example 2 is magnesium-aluminum hydrotalcite, while the catalyst used in Example 1 is sodium methoxide. The preparation method is the same as that in Example 1, and will not be described in detail here.

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Abstract

The present invention provides a polycarbonate resin for elastic hand-feel paint, the polycarbonate resin for elastic hand-feel paint comprising an unsaturated double bond and a hydroxyl group. The polycarbonate resin for elastic hand-feel paint provided by the present invention contains both unsaturated double bonds and hydroxyl groups, which can be cured by oxidation and self-crosslinking of the double bonds, and can also be cured by crosslinking with an isocyanate curing agent into macromolecules. Therefore, The polycarbonate resin for elastic hand paint of the present invention has dual curing properties, so that the polycarbonate resin for elastic hand paint has good self-drying property, softness, hydrolysis resistance, weather resistance and low temperature non-coagulation. The present invention also provides a preparation method of the polycarbonate resin for elastic hand paint and an elastic hand paint prepared from the polycarbonate resin for elastic hand paint as a raw material.

Description

technical field [0001] The invention relates to the technical field of elastic touch paint, in particular to a polycarbonate resin for elastic touch paint and a preparation method thereof. Background technique [0002] Polycarbonate resin is a polymer with hydroxyl groups at both ends of the molecule, and is widely used in elastomers, elastic hand paints, synthetic leather and so on. Polycarbonate resins that use elastic hand paints on the market are currently mainly used diols such as 1, 6 hexanediol, 1, 4 butanediol and ethylene glycol, which are added to the reaction kettle together with small molecular carbonates and catalysts for esterification. It is produced by exchange method to prepare polycarbonate resin. The disadvantages of these saturated diols to prepare polycarbonate resins are poor elasticity, relatively weak weather resistance, high freezing point and high hardness. Application in elastic feel paints. [0003] Therefore, there is an urgent need to provide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G64/30C08G64/02C09D169/00C09D7/63
CPCC08G64/305C08G64/0291C09D169/00C09D7/63C08K2201/014C08K5/098C08K5/13
Inventor 黄志
Owner 东莞市左镕工实业有限公司
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