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Polyurethane elastomer for automobile glass encapsulation and preparation method thereof

A polyurethane elastomer and automotive glass technology, which is applied in the field of polyurethane materials and its preparation, can solve the problems of poor mechanical properties and processing properties, poor weather resistance, and poor light stability of products, and achieve excellent mechanical properties, excellent fluidity, Good mold filling effect

Active Publication Date: 2010-07-07
南京汇科高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of RIM polyurethane elastomer with IPDI system instead of MDI system solves the shortcomings of poor light stability and poor weather resistance of the material, and meets the requirements for weather resistance and light aging performance of polyurethane elastomer for automotive exterior parts
However, due to the characteristics of the structure of the IPDI system, the mechanical properties and processing properties of the product are relatively poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Put 0.6 parts of pure MDI-1008 into the reaction kettle, blow in nitrogen, heat to 60°C, add dropwise 19.4 parts of TD400 polyether polyol with a hydroxyl equivalent of 200 (moisture is not more than 0.1%) into the kettle under stirring, and add dropwise After completion, keep the temperature at 60-85°C for 2-3 hours to obtain a prepolymer with an NCO content of 23%, which is the A component.

[0039] Mix the following components evenly to obtain component B: 87.7 parts of polyether 330N, 10.5 parts of diethyltoluene diamine, 1.8 parts of ethylene glycol, 1.5 parts of delayed triethylene diamine catalyst, 0.1 part of dibutyltin dithiol, 0.5 parts of 2-(2'-hydroxy-3',5'-di-tert-amylphenyl)benzotriazole, bis(1,2,2,6,6-pentamethyl-4-piperidinyl) 0.5 parts of sebacate, 0.5 parts of tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester, 0.5 parts of tris(nonylphenyl) phosphite, 1.0 parts of color paste .

[0040] Pump A and B components into...

Embodiment 2

[0045] A component is the same as embodiment 1.

[0046] Mix the following components evenly to obtain component B: 89 parts of polyether 330N, 10 parts of diethyltoluenediamine, 1 part of ethylene glycol, 1.0 parts of delayed triethylene diamine catalyst, 0.1 part of dibutyltin dithiol, 0.5 parts of 2-(2'-hydroxy-3',5'-di-tert-amylphenyl)benzotriazole, bis(1,2,2,6,6-pentamethyl-4-piperidinyl) 0.5 parts of sebacate, 0.5 parts of tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester, 0.5 parts of tris(nonylphenyl) phosphite, 1.0 parts of color paste .

[0047] The method for embodiment 1 makes polyurethane elastomer with RIM process, and the mass ratio of A, B component is 100: 36.7, and its physical property of prepared elastomer is shown in Table 2:

[0048] Table 2 Physical Properties of Polyurethane Elastomers

[0049] project

Embodiment 3

[0051] Add 16.5 parts of MDI-100LL and 65.5 parts of MDI-100LL into the reaction kettle, blow in nitrogen, heat to 60°C, and add dropwise 14 parts of TD2000 polyether polyol with a hydroxyl equivalent of 1000 (moisture is not more than 0.1 %) and 4 parts of TD400 polyether polyol with a hydroxyl equivalent of 200 (moisture is not more than 0.1%). The body is the A component.

[0052] Mix the following components evenly to obtain component B: polyether TEP-360085 parts, diethyltoluenediamine 11 parts, 3,3'-dichloro-4,4'-diaminodiphenylmethane 4 parts, delayed Sanya 2.0 parts of ethyl diamine catalyst, 0.15 parts of dibutyltin dithiol, 0.5 parts of 2-(2'-hydroxyl-3',5'-di-tert-amylphenyl)benzotriazole, bis(1,2, 0.5 parts of 2,6,6-pentamethyl-4-piperidinyl) sebacate, 0.5 parts of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol , 0.5 parts of tris(nonylphenyl) phosphite, and 1.0 parts of color paste.

[0053] According to the method of Example 1, the ...

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Abstract

The invention discloses a polyurethane elastomer for automobile glass encapsulation and a preparation method thereof. The elastomer is prepared from isocyanate component A and polyhydric alcohols component B with a reaction injection moulding process, wherein the density is larger than 1000kg / cubic meter, and the index number of the isocyanate is 90 to 120, the component A is NCO-capped prepolymer with NCO % being 18 to 28 %, and is the reaction product of aromatic diisocyanate and polyhydric alcohols with low molecular weight; the component B comprises at least 60 percent of polyether polyol with the molecular weight of 1000 to 10000, 1 to 20 percent of arylamine, 0 to 20 percent of alcohol, and 0.2 to 0.5 percent of composite catalyst, and also comprises an antioxidant, a light stabilizer and color paste. The polyurethane elastomer of the invention has excellent mechanical capacity and moderate aging resistant performance, and is applicable to the glass encapsulation with various specifications, especially to the large, ultrathin or complex product.

Description

technical field [0001] The invention relates to a polyurethane material and a preparation method thereof, in particular to a RIM polyurethane elastomer used for automobile glass edge wrapping and a preparation method thereof. Background technique [0002] The reaction injection molding (RIM) process is a molding technology developed in the 1970s. It is a combination of low-viscosity and high-reactivity isocyanate and polyol components through high-pressure collision mixing, and at the same time, they are quickly injected into the mold and quickly solidified through chemical reaction and phase separation in the mold cavity to form solid polymer products. The process integrates liquid delivery, metering, impact mixing, and rapid reaction molding, and has the characteristics of rapid response, short molding cycle, low cycle and demoulding pressure, wide range of adjustable formula, and high production efficiency. [0003] With the rapid development of the automobile manufactur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/78C08G18/66C08G18/48C08G18/24C08G18/10C08K5/3475C08K5/3435C08K5/134C08K5/526
Inventor 宋聪梅吴卫东魏永祥
Owner 南京汇科高分子材料有限公司
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