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Easy-to-weld modified polypropylene composite with oil resistance and high oxygen index and preparation method of composite

A high oxygen index, composite material technology, applied in the field of polymer materials, can solve the problems of small loss coefficient, poor high frequency welding performance of materials, limited application scope and potential, etc., to achieve low burning speed, excellent welding performance, process operation Easy to achieve effects

Inactive Publication Date: 2019-05-17
GUANGDONG JUSHI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The dielectric loss coefficient of ordinary polypropylene is very small, generally 0008-0.00418 (1MHz), and the high-frequency welding performance of the material is poor. These defects limit the application range and potential of polypropylene in the automotive industry

Method used

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  • Easy-to-weld modified polypropylene composite with oil resistance and high oxygen index and preparation method of composite
  • Easy-to-weld modified polypropylene composite with oil resistance and high oxygen index and preparation method of composite
  • Easy-to-weld modified polypropylene composite with oil resistance and high oxygen index and preparation method of composite

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preparation example Construction

[0044] The preparation method of the oil-resistant, high-oxygen index and easy-to-weld modified polypropylene composite material comprises the following steps:

[0045] 1) Weigh the raw materials according to the aforementioned composition, firstly mix the polypropylene, chlorinated polyethylene and toughening agent uniformly, then add compatibilizer, antioxidant and auxiliary agent to continue mixing to obtain the mixed material;

[0046] 2) Add the mixed material to the main feeding port of the twin-screw extruder, add the filler to the side feeding port of the twin-screw extruder, melt and blend under the protection of nitrogen or other inert gases, and then extrude through the twin-screw extruder It is extruded out of the machine and granulated to obtain a modified polypropylene composite material with oil resistance, high oxygen index and easy welding.

[0047] Preferably, in the step 1) of the preparation method, the mixing is stirring and mixing in a mixer, the stirring...

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Abstract

The invention discloses an easy-to-weld modified polypropylene composite with oil resistance and high oxygen index and a preparation method of the composite. The easy-to-weld modified polypropylene composite with oil resistance and high oxygen index is prepared from raw materials as follows: polypropylene, chlorinated polyethylene, a flexibilizer, filler, a compatilizer, an antioxidant and an aid.Meanwhile, the invention also discloses the preparation method of the easy-to-weld modified polypropylene composite with oil resistance and high oxygen index. By modification of filling polypropylenewith chlorinated polyethylene and maleic anhydride grafted polypropylene, the polarity of the composite can be greatly increased, so that the molten material mutually diffuses and infiltrates under the action of high-frequency welding, and very good welding strength is realized. Modified polypropylene has oil resistance and high oxygen index, can meet the standard requirement of combustion characteristics, has very low combustion speed, plays a toughening role with other toughening agents and has good comprehensive mechanical performance.

Description

technical field [0001] The invention relates to an oil-resistant, high-oxygen index and easy-to-weld modified polypropylene composite material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] With the continuous development and progress of the automobile industry, new concepts and technologies are constantly updated, the requirements for materials are getting higher and higher, and the performance is becoming more and more diversified. High-frequency welding of plastics is a fast, efficient, uniform heating, and simple and convenient welding method. By using high-frequency energy to act on the link area of ​​the material, the polar molecules of the material are frequently vibrated under the action of a high-frequency electric field. And heat is generated, so that the plastic material between the electrodes reaches a melting state at the same time, so that the two materials can be welded together, and the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/28C08L51/06C08L23/08C08K3/34
Inventor 熊金标林经萍黄方雁杨海民贾似海刘鹏辉刘俊李函坚张宗豪
Owner GUANGDONG JUSHI CHEM CO LTD
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