SMC (sheet molding compound) material for passenger car covering parts and preparation method thereof

A technology for covering parts and passenger cars, applied in the field of sheet molding compounds, which can solve the problems of easy removal from the mold, poor adhesion, cracking, etc.

Inactive Publication Date: 2012-08-15
江苏兆新材料科技
View PDF2 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the continuous improvement of people's environmental protection awareness and the successive introduction of environmental protection regulations in various countries, automobile weight reduction has become an inevitable trend in the future automobile development. SMC materials can be used to prepare low specific gravity composite materials. The general method used is to add hollow glass beads. However, the traditional mold relea

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A SMC material for passenger car panels with low specific gravity, no surface treatment and A-level surface characteristics. The composition of the raw materials is as follows: the matrix resin is unsaturated isophthalic resin 65; the reinforcing fiber is glass fiber 85; low shrinkage The agent is PVAc / St copolymer and saturated polyester composite low shrinkage system 35, wherein PVAc / St copolymer 25, saturated polyester 10; inorganic mineral filler is aluminum hydroxide 150; hollow glass microspheres are 3M company VS5500 model 30 ; The release agent is BYK-P9080 4; the curing agent is TBPB or TBPB and TBPO composite initiation system 2, wherein the weight ratio of TBPB / TBPO is 0.7 / 0.3; the thickener is magnesium oxide 1.5.

[0022] Put the above-mentioned isophthalic resin, low shrinkage agent, filler of inorganic mineral, hollow glass microspheres, release agent, and curing agent into the high-speed shear mixer according to the formula amount, and fully stir. Ma...

Embodiment 2

[0026] Another SMC material for passenger car panels with low specific gravity, no surface treatment and A-level surface characteristics, its raw material composition is as follows by weight fraction: matrix resin is unsaturated isophthalic resin 65; reinforcing fiber is glass fiber 85; low The shrinkage agent is PVAc / St copolymer and saturated polyester composite low shrinkage system 35, of which PVAc / St copolymer is 25, saturated polyester is 10; inorganic mineral filler is aluminum hydroxide 150; hollow glass microspheres are 3M company VS5500 model 50; the release agent is BYK-P9080 4; the curing agent is TBPB or TBPB and TBPO composite initiation system 2, wherein the weight ratio of TBPB / TBPO is 0.7 / 0.3; the thickener is magnesium oxide 1.5.

[0027] Put the above-mentioned isophthalic resin, low shrinkage agent, inorganic mineral filler, hollow glass microspheres, release agent, and curing agent into the high-speed shear mixer according to the formula amount, and sti...

Embodiment 3

[0030] Embodiment 3 differs from Embodiment 1 only in ingredients. Another SMC material for passenger car panels with low specific gravity, no surface treatment and A-level surface characteristics, its raw material composition is as follows by weight fraction: matrix resin is unsaturated isophthalic resin 70; reinforcing fiber is glass fiber 75; The shrinkage agent is PVAc / St copolymer and saturated polyester composite low shrinkage system 30, of which PVAc / St copolymer is 20, saturated polyester is 10; inorganic mineral filler is aluminum hydroxide 160; hollow glass microspheres are 3M company VS5500 model 50; the release agent is BYK-P9080 4; the curing agent is TBPB or TBPB and TBPO composite initiation system 2, wherein the weight ratio of TBPB / TBPO is 0.7 / 0.3; the thickener is magnesium oxide 1.5.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Bending strengthaaaaaaaaaa
Impact strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses an SMC (sheet molding compound) material for passenger car covering parts and a preparation method thereof. The SMC material comprises 60-100 parts of base resin, 80-200 parts of reinforcing fiber, 30-50 parts of low shrinkage agent, 130-220 parts of inorganic mineral filler, 20-60 parts of hollow glass microsphere, 3-8 parts of releasing agent, 1-4 parts of curing agent and 1-5 parts of thickening agent. The hollow glass microspheres, of which the average particle size is less than 40 micrometers and the compression strength is greater than 37MPa, are utilized to lower the density of the material; the novel liquid releasing agent is used instead of the traditional releasing agent, so that the product surface can be directly painted without treatment; and PVAc/St copolymer and saturated polyester are utilized to compound the low shrinkage system, so that the material has zero shrinkage and satisfies the requirements for Grade A surfaces. The invention has the advantages of low specific gravity, no need of surface treatment and Grade A surface, and can be used for passenger car covering parts instead of steel materials.

Description

[0001] technical field [0002] The invention relates to the field of sheet molding compounds, in particular to an SMC material for passenger car panels with low specific gravity, no surface treatment and A-level surface characteristics and a preparation method thereof. Background technique [0003] Passenger car cover (referred to as cover), refers to the surface and interior of the special-shaped body that constitutes the body or cab, covers the engine and chassis, and the interior of the car. The cover is not only a decorative part, but also a closed shell-shaped force-bearing part. The shape of the automobile body is welded by many covering parts with large outline size and spatial surface shape, so there are high requirements for the dimensional accuracy and surface quality of the covering parts. Body panels require smooth surfaces, clear lines, and no surface defects such as wrinkles, scratches, and roughness. In addition, sufficient rigidity and dimensional stabi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08L67/06C08L31/04C08L25/14C08K7/28C08K7/14C08K7/12C08K7/08C08K3/02C08K3/08
Inventor 鲁平才阮诗平
Owner 江苏兆新材料科技
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap