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Car roof handle and preparation method thereof

An automobile roof and roof technology, which is applied in the field of automobile parts to achieve the effects of improving melt strength, increasing melt flow rate and high melt strength

Inactive Publication Date: 2019-04-09
NINGBO SHUAITELONG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims at the problems existing in the gas-assisted molding materials of the existing automobile roof handles, and provides a new polypropylene composite material, which improves the fluidity of the material by inserting antimony elements into the polypropylene molecular chain, and compounding polyurethane and fillers and melt strength, so as to obtain polypropylene materials with both high melt strength and high fluidity, which can effectively improve the quality of gas-assisted molding products

Method used

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Experimental program
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Effect test

Embodiment 1

[0047] The car roof handle of the present embodiment is made of the following components by weight:

[0048] Antimony-containing polypropylene resin: 70 parts; polyether polyurethane: 20 parts; glass fiber: 8 parts; aluminum hydroxide: 4 parts; molybdenum oxide: 2 parts; antioxidant 1010: 0.9 parts; PP-g-MA: 1 part; zinc stearate: 0.5 part.

[0049] Wherein, antimony-containing polypropylene resin is prepared by the following steps: dissolving polypropylene resin and antimony trichloride in chloroform, the mass ratio of polypropylene resin and antimony trichloride is 10:1, adding pyridine during stirring, In the atmosphere, react at 30°C for 20h, then centrifuge, heat and evaporate the precipitate to remove the solvent, and obtain the antimony-containing polypropylene resin. The above-mentioned polypropylene resin is composed of 80wt% high molecular weight polypropylene and 20wt% low molecular weight polypropylene, wherein the melt flow rate of high molecular weight polypropy...

Embodiment 2

[0053] The car roof handle of the present embodiment is made of the following components by weight:

[0054] Antimony-containing polypropylene resin: 60 parts; polyether polyurethane: 10 parts; carbon fiber: 5 parts; decabromodiphenyl ether: 4 parts; antioxidant 1010: 0.4 parts; antioxidant 168: 0.3 parts; PP-g - MA: 0.8 parts; white mineral oil: 0.5 parts.

[0055] Wherein, antimony-containing polypropylene resin is prepared by the following steps: dissolving polypropylene resin and antimony trichloride in chloroform, the mass ratio of polypropylene resin and antimony trichloride is 8:1, adding pyridine during stirring, In the atmosphere, react at 25°C for 20h, then centrifuge, heat and evaporate the precipitate to remove the solvent, and obtain the antimony-containing polypropylene resin. The above-mentioned polypropylene resin is composed of 75wt% high molecular weight polypropylene and 25wt% low molecular weight polypropylene, wherein the melt flow rate of high molecular ...

Embodiment 3

[0059] The car roof handle of the present embodiment is made of the following components by weight:

[0060] Antimony-containing polypropylene resin: 80 parts; polyether polyurethane: 30 parts; calcium carbonate whiskers: 10 parts; zinc borate: 6 parts; antioxidant 1010: 0.2 parts; antioxidant 736: 0.2 parts; antioxidant 168: 0.2 part; PP-g-MA: 1 part; calcium stearate: 1 part.

[0061] Wherein, antimony-containing polypropylene resin is prepared by the following steps: polypropylene resin and antimony trifluoride are dissolved in chloroform, and the mass ratio of polypropylene resin to antimony trifluoride is 15:1. React at 35°C for 18 hours, then centrifuge, and remove the solvent by heating and evaporating the precipitate to obtain the antimony-containing polypropylene resin. The above-mentioned polypropylene resin is composed of 85wt% high molecular weight polypropylene and 15wt% low molecular weight polypropylene, wherein the melt flow rate of high molecular weight polyp...

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Abstract

The invention belongs to the technical field of car parts, and in particular, relates to a car roof handle and a preparation method thereof. The roof handle is prepared from the following materials inparts by weight: 60-80 parts of antimony-containing polypropylene resin, 10-30 parts of polyurethane, 5-10 parts of filler, 2-8 parts of fire retardant, 0.1-2 parts of antioxygen and 0.5-5 parts of processing agent.

Description

technical field [0001] The invention belongs to the technical field of auto parts, and in particular relates to an auto ceiling handle and a preparation method thereof. Background technique [0002] Gas-assisted injection molding (hereinafter referred to as "gas-assisted molding" or GAIM), as a relatively new polymer processing technology, was not widely used industrially until the end of the last century. Compared with conventional injection molding (CIM), gas-assisted molding has the advantages of saving raw materials, shortening molding cycle, reducing clamping force and good dimensional stability of parts. Usually in the gas-assisted molding process, it is necessary to use high-pressure inert gas as the penetrating gas to push and compress the polymer melt until the melt fills the entire mold cavity, and then the melt is gradually cooled and solidified under the pressure of the gas. After the temperature of the part drops to the demoulding temperature, the mold can be o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L75/08C08L51/06C08L91/06C08K13/04C08K7/14C08K7/06C08K7/08C08K3/22C08K5/098C08K5/06C08K3/38
CPCC08K2003/2227C08K2003/2255C08K2003/387C08L23/12C08L2205/025C08L2205/035C08L75/08C08L51/06C08K13/04C08K7/14C08K3/22C08K5/098C08L91/06C08K7/06C08K5/06C08K7/08C08K3/38
Inventor 吴志光张芳刚曹晓鹏田建开娄晓华
Owner NINGBO SHUAITELONG GRP CO LTD