Integral skin polyurethane-urea composition, preparation method and application thereof

A technology of polyurethane urea and self-skinning, applied in the application field of making automotive interior parts, to achieve good technical performance, fast demoulding time, and low density

Active Publication Date: 2009-12-16
湖州合达图宏新材料技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the above-mentioned patent describes its molding process, the demoulding time is generally 150 seconds

Method used

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  • Integral skin polyurethane-urea composition, preparation method and application thereof
  • Integral skin polyurethane-urea composition, preparation method and application thereof

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preparation example Construction

[0056] The preparation of component B can adopt the well-known polymerization method of those skilled in the art, such as "Polyurethane Handbook: The Third Chapter Raw Materials" (edited by [Germany] G Ertel, translated by Yan Jiabin, Lv Yanxian, etc., China Petrochemical Press, 1st edition , 1992, P63) related preparation technology introduced.

[0057] Specifically, preheat 100 parts of MDI to 60-90°C, preferably 80°C; add 0.003-0.05 parts of catalyst, such as 426 cobalt catalyst; slowly add 1-30 parts of dehydrated polyol, such as , polycaprolactone diol; after the polymerization starts, the temperature of the polymerization system rises due to heat release, and the reaction temperature is controlled not to exceed 130°C, and the reaction is 30-120 minutes; add 0.003-0.05 parts of a terminator, such as benzoyl chloride , to deactivate the catalyst to terminate the polymerization reaction; cool to room temperature, and seal the package.

[0058] In the above reaction, the ca...

Embodiment 1

[0084] Preparation of component A:

[0085] According to the formulations of the 6 components A given in Table 1, stir evenly at room temperature to obtain the 6 components A.

[0086] Table 1. Composition of 6 components A

[0087]

Embodiment 2

[0089] Synthesis of Component B:

[0090] (1) Dehydration of polyalcohols: first, a sufficient amount of polycaprolactone diol Put PL-2000 into a reaction kettle equipped with a stirrer and a vacuum system, heat it to 120°C under stirring, then evacuate it to -0.09MPa, dehydrate it for 120 minutes, and then cool it to room temperature for use.

[0091] (2) Preparation of allophanate modified isocyanate: 40 parts of 4,4'-MDI such as 1810, 20 parts of 4,4'-MDI and 4,4'-MDI mixture 3056, 30 parts of carbodiimide modified MDI 2020 and 10 parts of polymerized MDI were put into another reactor, and under the protection of nitrogen, the temperature was raised to 80°C with stirring; 0.005 parts of 426 cobalt catalyst was added, and then 12.5 parts of polymer dehydrated according to step (1) were added in batches. caprolactone diol PL-2000. The exothermic heat of the polymerization system raises the temperature, and the reaction temperature is controlled not to exceed 130°C. ...

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Abstract

The invention discloses a quick demoulding water-blown low-density integral skin polyurethane-urea composition which comprises a polyalcohol mixture component A and a modified isocyanate component B, wherein the component A is a polyalcohol mixture which comprises polyether glycol, polymer polyol, a cross linking agent, organic diamine, a divalent alcohol chain extender, a nonvolatile catalyst and/or a reactive catalyst, water and color paste; the component B is allophanate modified isocyanate containing 22-31 wt percent of NCO and is formed by polymerizing methyl diphenylene diisocyanate (MDI) and polyalcohol with molecular weight of 62-3000. The component A and the component B according to a weight ratio of 100:40-100 are polymerized into integral skin polyurethane-urea with integral intensity of 260-400 kg/m, and the integral skin polyurethane-urea can be demoulded within 60 seconds.

Description

technical field [0001] The invention relates to a low-density self-skinned polyurethane urea composition foamed by water for rapid release, a preparation method thereof, and an application thereof for making automotive interior parts. Background technique [0002] In the current production process of water-foamed self-skinning polyurethane automotive steering wheel and armrests and other automotive interior parts, the production efficiency is generally low. The demoulding time in the polyurethane molding process is one of the key factors determining production efficiency, and reducing the demoulding time can improve production efficiency. In addition, reducing the density of products can achieve the purpose of saving raw materials. [0003] Water-blown integral-skin polyurethane technology is described in US Patent Nos. 5,166,183, 5,216,035, 5,234,961, 5,236,960, 5,236,961, 5,266,234, 5,284,880, 5,338,820, 5,514,723, and 5,658,959. The main research focus is on the aboliti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/22C08G18/10C08K5/17B29C45/00C08K5/09C08K5/15C08G101/00B29L31/58
Inventor 万小龙幺庆金胡忠伟蔡杰
Owner 湖州合达图宏新材料技术股份有限公司
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