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Composition for preparing transparent polyurethane, workpiece and forming method thereof, automobile appearance part and forming method

A technology of composition and polyurethane, which is applied in the direction of chemical instruments and methods, synthetic resin layered products, household components, etc., can solve the problems of poor heat resistance, low high temperature hardness, and slow curing speed of parts, and achieve short molding cycle, The effect of fast curing speed and good transparency

Active Publication Date: 2019-05-24
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems of slow curing speed, long molding cycle, poor heat resistance and low hardness at high temperature when using RTM technology to form carbon fiber-polyurethane composite parts, and to provide a composition for preparing transparent polyurethane and Its parts and molding methods

Method used

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  • Composition for preparing transparent polyurethane, workpiece and forming method thereof, automobile appearance part and forming method
  • Composition for preparing transparent polyurethane, workpiece and forming method thereof, automobile appearance part and forming method

Examples

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preparation example Construction

[0060] (2) Inject the composition for preparing transparent polyurethane of the present invention onto the carbon fiber cloth in the mold through a high-pressure injection machine, and then solidify to obtain an injection part;

[0061] (3) Machining and optional surface treatment are performed on the injection part to obtain a carbon fiber-polyurethane composite part.

[0062] Specifically, including:

[0063] (1) Lay the carbon fiber cloth in the mould, and close the mold to evacuate to a degree of vacuum below 500Pa, preferably below 300Pa;

[0064] (2) The composition for preparing transparent polyurethane of the present invention with a material temperature of 30-60° C. is injected into the carbon fiber cloth in the mold with an injection pressure of 10-20 MPa, preferably 12-15 MPa, through a high-pressure injection machine, and then After curing at a mold temperature of 70-90°C for 2-3 minutes, an injection part is obtained;

[0065] (3) Machining and optional surface ...

Embodiment 1-4 and comparative example 1

[0103] Prepare A and B components according to the ingredients listed in Table 1.

[0104] Lay the hot-melt adhesive film and 3K carbon fiber cloth in the mold, and close the mold to evacuate; the composition for preparing transparent polyurethane resin composed of component A and component B with material temperature is injected through a high-pressure injection machine. Vacuumized mold, then solidified and molded at a certain mold temperature to obtain injection parts, and then processed to obtain carbon fiber-polyurethane composite parts. The processing conditions and the hardness and transparency of the obtained parts are shown in Table 1.

[0105] Table 1

[0106]

[0107]

[0108] *The molar ratio of the sum of active groups contained in component A to the isocyanate groups contained in component B

[0109] Can find out by the data of above-mentioned embodiment, comparative example and table 1, adopt the technical scheme that the present invention provides can im...

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Abstract

The invention relates to the field of matrix resin used for a resin transfer molding technology, and discloses a composition for preparing transparent polyurethane, a workpiece and a forming method thereof, an automobile appearance part and a forming method. The composition comprises a component A and a component B; the component A comprises polyether glycol, polyester polyol and a micromolecule cross-linking agent; the component B is isocyanate, wherein the micromolecule cross-linking agent comprises an isocyanate active compound with tri-functionality and a compound C-A prepared from organicamines and bifunctionality epoxy resin through a reaction; the isocyanate active compound with tri-functionality is selected from one or more of trimethylolpropane, glycerin, triethanolamine and diethanolamine; in the component A, by weight, 50-90 parts of polyester glycol, 0-25 parts of polyester polyol, 0-10 parts of isocyanate active compound with tri-functionality and 10-25 parts of the compound C-A are contained; the weight ratio of the component A to the component B is 1:3-3:1. When the composition is used for RTM forming processing, curing speed is high, the forming period is short, and heat resistance is improved.

Description

technical field [0001] The invention relates to the field of carbon fiber-polyurethane composite parts, in particular to a composition for preparing transparent polyurethane, a carbon fiber-polyurethane composite part obtained by using the composition and a preparation method thereof using a resin transfer molding process, and using the combination The automobile exterior parts made by the product and the molding method thereof. Background technique [0002] Carbon fiber composite materials used in automotive fiber fabric interior parts can be formed mainly by prepreg compression molding or resin transfer molding (RTM) molding. Compression molding adopts carbon fiber epoxy resin prepreg or thermoplastic resin prepreg compression molding, which requires a complicated prepreg production process, and the curing speed of carbon fiber epoxy resin prepreg is slow, the production efficiency is low, and the surface quality is poor. Difference. The molding process can often only fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08K7/06C08G18/32C08G18/42C08G18/66C08G18/12C08G18/75B29C70/36B32B9/00B32B9/04B32B27/00B32B27/40B29L31/30
Inventor 黄少华周明张秀峰
Owner BYD CO LTD
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