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Yellowing-resistant and uvioresistant polyurethane elastomer and preparation method thereof

A polyurethane elastomer, anti-ultraviolet technology, applied in the field of polyurethane, can solve the problems of poor physical and mechanical properties of polyurethane elastomer, anti-yellowing, poor anti-ultraviolet, affecting the service life of products, etc., to achieve low cost and improve ultraviolet shielding performance , the effect of high production efficiency

Inactive Publication Date: 2013-09-04
DONGGUAN JINGLUN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned polyurethane elastomer not only has poor physical and mechanical properties, but also has poor anti-yellowing and anti-ultraviolet rays. It is easy to turn yellow, become brittle, and aging when used outdoors or in special environments, which will affect the service life of the product.

Method used

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  • Yellowing-resistant and uvioresistant polyurethane elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A kind of preparation method of anti-yellowing, anti-ultraviolet polyurethane elastomer, it comprises following preparation steps:

[0055] Step 1. 70 kg of polyether polyol with a functionality of 2 and a number average molecular weight of 1000, 29 kg of toluene dicyanate, antioxidant (bis[β(3-tert-butyl-5-methyl-4 -Hydroxyphenyl)propionic acid]triethylene glycol ester) 1kg, added to the container in turn, and reacted at 67°C for 2 hours to obtain component A with a mass content of isocyanide of 7.2%;

[0056] Step 2: Add 78 kg of polyether polyol with a functionality of 3 and a number average molecular weight of more than 5000, 20 kg of curing agent diethyltoluenediamine, 1 kg of dipropylene glycol solution of catalyst triethylene diamine, anti-aging agent { 2-(2'-Hydroxy-3',5'-bis[1,1-dimethylphenyl])-benzotriazole)-5-chlorinated benzotriazole} 1kg added to the container in turn , dehydration under the conditions of a temperature of 45°C and a vacuum of -0.095MPa unt...

Embodiment 2

[0059] A kind of preparation method of anti-yellowing, anti-ultraviolet polyurethane elastomer, it comprises following preparation steps:

[0060]Step 1. 65 kg of polyether polyol with a functionality of 2 and a number average molecular weight of 2000, 33 kg of toluene dicyanate, antioxidant (bis[β(3-tert-butyl-5-methyl-4 -Hydroxyphenyl)propionic acid]triethylene glycol ester) 2kg was added to the container in turn, and reacted in the container at 70°C for 3 hours to obtain component A with a mass content of isocyanide of 5.2%;

[0061] Step 2: Add 70 kg of polyether polyol with a functionality of 3 and a number average molecular weight of more than 5000, 28 kg of curing agent diethyltoluenediamine, 0.5 kg of dipropylene glycol solution of catalyst triethylene diamine, anti-aging agent { 2-(2'-Hydroxy-3',5'-bis[1,1-dimethylphenyl])-benzotriazole)-5-chlorinated benzotriazole} 1.5kg was added to the container in turn , dehydration under the conditions of a temperature of 50°C an...

Embodiment 3

[0064] A kind of preparation method of anti-yellowing, anti-ultraviolet polyurethane elastomer, it comprises following preparation steps:

[0065] Step 1. Add 63 kg of polyether polyol with a functionality of 2 and a number average molecular weight of 3000, 35 kg of toluene dicyanate, and an antioxidant (bis[β(3-tert-butyl-5-methyl-4- Hydroxyphenyl) propionate] triethylene glycol ester) 2kg were added to the container in turn, and reacted in the container at 75°C for 2 hours to obtain component A with a mass content of isocyanide of 7.2%;

[0066] Step 2: Add 78 kg of polyether polyol with a functionality of 3 and a number average molecular weight of more than 5000, 20 kg of curing agent diethyltoluenediamine, 1 kg of dipropylene glycol solution of catalyst triethylene diamine, anti-aging agent { 2-(2'-Hydroxy-3',5'-bis[1,1-dimethylphenyl])-benzotriazole)-5-chlorinated benzotriazole} 1kg added to the container in turn , dehydration under the conditions of a temperature of 50°C...

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Abstract

The invention discloses a yellowing-resistant and uvioresistant polyurethane elastomer and a preparation method thereof. The yellowing-resistant and uvioresistant polyurethane elastomer is prepared from a component A and a component B, wherein the component A comprises 60-70% of polyether polyol, 20-35% of toluene diisocyanate and 1-2% of (bi[beta(3-tert-butyl-5-methyl-4-hydroxylphenyl)]propanoyl) as an antioxidant; and the component B comprises 65-80% of polyether polyol, 12-30% of diethyl methyl benzene diamine as a curing agent, 0.05-1% of triethylene diamine dipropylene glycol solution as a catalyst and 1-2% of {2-(2'-hydroxyl-3',5'-bi[1,1-dimethylphenyl])-benzotriazole)-5-chloridized benzotriazole} as an anti-aging agent. The yellowing-resistant and uvioresistant polyurethane elastomer can be used for intensely absorbing ultraviolet rays with the wavelength of 270-400nm and has favorable absorption, conversion, reflection and radiation functions for the ultraviolet rays, so that the ultraviolet ray shielding property and the efficient anti-aging and yellowing resistance of a polyurethane product are improved.

Description

technical field [0001] The invention relates to the technical field of polyurethane, in particular to a yellow-resistant and ultraviolet-resistant polyurethane elastomer and a preparation method thereof. Background technique [0002] Polyurethane elastomer is a polymer synthetic material with properties between rubber and plastic. It is characterized by a wide range of hardness adjustment; it has both the elasticity of rubber and the hardness of plastic; it also has good mechanical properties, wear resistance and Resilience, so polyurethane elastomers are widely used. [0003] For example, the Chinese invention patent application with the application number 200910201089.7 introduces a thermoplastic polyurethane elastomer and its manufacturing method. Its formula is as follows: 4,4'-diphenylmethane-diisocyanate 20-40%; polybutylene adipate Alcohol ester (molecular weight 1000 or 2000) 15-70%; polybutylene adipate (molecular weight 2000) 0-50%; 1,4-butanediol 5-15%; ethylene ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/48C08K5/134C08K5/3475
Inventor 李文东
Owner DONGGUAN JINGLUN IND
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