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Paint metaphenylene sheet moulding plastic bumper for automobile external-decoration

A sheet molding compound, bumper technology, used in bumpers and other directions, can solve the problems of poor mechanical properties, toughness, heat resistance and corrosion resistance of cured products, and achieve fast curing, easy dispersion and good compatibility. Effect

Inactive Publication Date: 2004-09-15
JIANGYIN XIETONG AUTOMOBILE ACCESSORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the ester bond on the molecular chain of the cured o-phthalic polyester resin is easily attacked by water and other corrosive media, the mechanical properties, toughness, heat resistance and corrosion resistance of the cured product are poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of the present invention mainly includes four steps of resin paste preparation, tablet making, molding and paint spraying. Concrete preparation steps are as follows:

[0027] The first step: preparation of resin paste

[0028] The components that make up the resin paste must be fully mixed in advance before being applied to the supporting film (polyethylene film or nylon film) of the tablet machine, and put into use in the form of a paste mixture—resin paste. The resin paste was prepared by continuous mixing method. This method is to mix and stir all the liquids or solids of the resin paste evenly according to the formula requirements.

[0029] 1. Prepare materials

[0030] Take 100 parts of isophthalic unsaturated polyester resin, 100 parts of calcium carbonate, 1.0 parts of tert-butyl peroxybenzoate, 2 parts of magnesium oxide, 10 parts of polystyrene, and 2 parts of zinc stearate.

[0031] 2. Preparation of resin paste

[0032] Add the abo...

Embodiment 2

[0044] The first step: preparation of resin paste

[0045] 1. Prepare materials

[0046] Take 100 parts of isophthalic unsaturated polyester resin, 150 parts of calcium carbonate, 1.0 part of tert-butyl peroxybenzoate, 1 part of magnesium oxide, 1 part of magnesium hydroxide, 2 parts of polyvinyl acetate, 1 part of aluminum stearate share.

[0047] 2. Preparation of resin paste

[0048] Add the above-mentioned isophthalic unsaturated polyester resin and polyvinyl acetate into the mixer and stir evenly, then add tert-butyl peroxybenzoate and aluminum stearate and stir evenly, then add calcium carbonate and stir evenly, then add magnesium oxide Stir well with magnesium hydroxide to make a resin paste.

[0049] Step Two: Production

[0050] Tablet production includes material preparation, pasting operation, impregnation and compounding and other processes.

[0051] 1. Prepare materials

[0052] Take 72 parts of resin paste, 28 parts of glass fiber, and polyethylene film to ...

Embodiment 3

[0056] The first step: preparation of resin paste

[0057] 1. Prepare materials

[0058] Take 100 parts of isophthalic unsaturated polyester resin, 50 parts of calcium carbonate, 50 parts of aluminum hydroxide powder, 0.8 parts of tert-butyl peroxybenzoate, 1.5 parts of calcium oxide, 5 parts of polyvinyl acetate, calcium stearate 0.5 parts, 1 part of zinc stearate.

[0059] 2. Preparation of resin paste

[0060] Add the above-mentioned isophthalic unsaturated polyester resin and polyvinyl acetate into the mixer and stir evenly, then add tert-butyl peroxybenzoate, calcium stearate, zinc stearate and stir evenly, then add calcium carbonate and hydrogen Alumina powder is stirred evenly, then calcium oxide is added and stirred evenly, and a resin paste is made.

[0061] Step Two: Production

[0062] Tablet production includes material preparation, pasting operation, impregnation and compounding and other processes.

[0063] 1. Prepare materials

[0064] Take 70 parts of res...

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PUM

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Abstract

The invention relates to a car external-decorating paint iso-phthalic sheet mould plastic safety bar, using iso-phthalic unsaturated polyester as main material, calcium carbonate or / and aluminum hydrate as filling, peroxides as initiator, alkaline earth oxide or / and hydrate as thickening agent, polystyrenes or polyvinyl acetates as low-contraction additive, and stearic acid or stearates as internal mold release, mixing uniformly to make into resin paste, coating the resin paste on the loading film of sheet-making set, adding in glass fiber as reinforcing material to dip and compound to make into sheets, then pressing the sheets into pressed products of the safety bar, and then spraying paint to make into the finished products. It has good mechanical performance, chemical corrosion resistance, good tenacity and water resisting property, etc.

Description

Technical field: [0001] The present invention relates to an automobile. In particular, it relates to a painted isophthalic sheet molding compound bumper for automobile exterior. The utility model belongs to the technical field of automobile decoration parts. Background technique: [0002] Traditional automobile exterior bumpers are generally ortho-phthalic. The main components of its raw materials are o-phthalic polyester resin, glass fiber, thickener, curing agent, filler and other auxiliary materials. Since the ester bond on the molecular chain of the ortho-phthalic polyester resin is easily attacked by water and other corrosive media, the mechanical properties, toughness, heat resistance and corrosion resistance of the cured product are poor. The finished product has low bending and impact strength and modulus. Invention content: [0003] The object of the present invention is to overcome above-mentioned deficiency, provide a kind of mechanical property good, chemic...

Claims

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Application Information

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IPC IPC(8): B60R19/03
Inventor 钱德洪
Owner JIANGYIN XIETONG AUTOMOBILE ACCESSORY
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