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Yellowing-resistant transparent polyurethane elastomer combined material and using method thereof

A polyurethane elastomer and transparent technology, applied in the field of polyurethane elastomers, can solve problems such as poor yellowing resistance, and achieve the effects of low cost, improved production efficiency, and shortened demolding time.

Active Publication Date: 2008-01-02
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of anti-yellowing transparent polyurethane elastomer composite material and its use method, which can overcome the shortcomings of poor yellowing resistance of polyurethane elastomer products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The polyol part is 43% of polyether polyol (PPG) with 3 functionalities and molecular weight of 6000, 50wt% of polyether polyol (PPG) with 2 functionalities and molecular weight of 3000, 6% of 1,4-butanediol, organic zinc (iso Zinc octanoate) 1% mixed composition.

[0019] The prepolymer is prepared by reacting polyether polyol (PPG) with a molecular weight of 1000 and bifunctionality with isophordione diisocyanate at 70°C to 90°C to prepare a prepolymer with NCO%=16wt%.

[0020] When in use, the prepolymer part and the polyol part are mixed in a weight ratio of 2:1, the mixing temperature is 30°C, pouring, vulcanization molding, the vulcanization temperature of the product is 50°C, and the curing time is 3 hours.

Embodiment 2

[0022] The polyol part is 30% of polyether polyol (PPG) with 3 functionalities and molecular weight of 400, 60% of polyether polyols with 2 functionalities and molecular weight of 4000, 9% of 1,4-butanediol, organic bismuth (cyclo bismuth alkanoate) 1% mixed composition.

[0023] The prepolymer part is made by reacting polyether polyol (PPG) with a molecular weight of 2000 and bifunctionality with isophordione diisocyanate at 70°C to 90°C to prepare a prepolymer with NCO%=12%.

[0024] When used, the prepolymer part and the polyol part are mixed in a weight ratio of 2:1, the mixing temperature is 40°C, pouring, vulcanization molding, the vulcanization temperature of the product is 30°C, and the curing time is 4 hours.

Embodiment 3

[0026] The polyol part is 70% of polyether polyol (PPG) with 3 functionalities and molecular weight of 3000, 24% of polyether polyols with 2 functionalities and molecular weight of 2000, 5% of 1,4-butanediol, organic zinc (quine Zinc alkanoate) 1% mixed composition.

[0027] The prepolymer part is made by reacting polyether polyol (PPG) with a molecular weight of 1000 and 2 functionalities with isophordione diisocyanate at 70°C to 90°C to prepare a prepolymer with NCO%=14%.

[0028] When in use, the prepolymer part and the polyol part are mixed in a weight ratio of 1:1, the mixing temperature is 25°C, pouring, vulcanization molding, the vulcanization temperature of the product is 65°C, and the curing time is 2 hours.

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PUM

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Abstract

The invention provides a yellowed-resistance type transparent urethane elastomer combination material, wherein the polyatomic alcohol part comprises 3 functionality and 4000-6000 molecular weight polyether polyol, 2 functionality and 2000-4000 molecular weight polyether polyol, aromatic, chain expansion agent and accelerant; the prepolymer part (NCO%=12%-17%)is made by 1000-2000 molecular weight, 2 functionality polyether polyol and isophorone diisocyanate at 70-90Deg. The use method comprises the following steps: mixing prepolymer with polyatomic alcohol part according to 2:1-1:1 at 25Deg. C-40Deg. C, pouring; vulcanizing at 25Deg. C-70Deg. C. The product avoids the low yellowed resistance problem of the urethane elastomer product, which is used to manufacture the armoured glass, the neon sign board, the shoe sign and the nameplate of the household electrical appliance.

Description

technical field [0001] The invention belongs to polyurethane elastomers, in particular to an anti-yellowing transparent polyurethane elastomer composite material and its application method. Background technique [0002] Polyurethane elastomers have both rubber properties and plastic properties. With the continuous advancement of polyurethane elastomer technology, its application fields are becoming wider and wider. Polyurethane elastomer products play an important role in various industries. Therefore, polyurethane elastomers Body has become the fastest growing and most widely used product in polyurethane materials. [0003] Currently commonly used polyurethane elastomer materials are synthesized from aromatic diisocyanates such as TDI (toluene diisocyanate) and MDI (diphenylmethane diisocyanate) as raw materials. These aromatic diisocyanates will turn yellow when exposed to ultraviolet light. , so that the transparency of the product is reduced, and the processing methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/72C08G18/10
Inventor 陈海良张芳
Owner SHANDONG INOV POLYURETHANE
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