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Flame-retardant toughened polydicyclopentadiene composite material and preparation method thereof

A technology of polydicyclopentadiene and dicyclopentadiene, which is applied in the field of preparation of the composite material, can solve the problems of degraded material and product performance, reduced catalytic activity, limited application range, etc., and achieves improved impact strength and limiting oxygen index. The effect of improving and saving production costs

Active Publication Date: 2012-09-19
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, PDCPD belongs to hydrocarbons and is easy to burn. Once ignited, it can form a chain combustion with a lot of black smoke, which severely limits its application range.
A lot of work has been done on the flame retardant research of PDCPD, but the catalytic polymerization reaction conditions of DCPD are harsh, and the molding process is special, so the choice of flame retardant should not reduce the catalytic activity, adapt to the RIM process, and not degrade the materials and products. performance

Method used

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  • Flame-retardant toughened polydicyclopentadiene composite material and preparation method thereof
  • Flame-retardant toughened polydicyclopentadiene composite material and preparation method thereof

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Embodiment 1

[0020] The flame-retardant and toughened polydicyclopentadiene composite material of this embodiment is obtained by blending and polymerizing the following main raw materials in the following weight percentages: 100 parts of dicyclopentadiene, number average molecular weight of 200,000, chlorine content 2 parts of 50wt% chlorinated polypropylene and 2 parts of antimony trioxide powder with an average particle size of 20 microns.

[0021] The flame-retardant and toughened polydicyclopentadiene composite material of this embodiment is prepared by the following method:

[0022] Under nitrogen protection, add 2 parts of chlorinated polypropylene with a molecular weight of 100,000 and 50% chlorine to 100 parts of dicyclopentadiene at 70°C, stir and dissolve, and then add 2 parts of dioxytrioxide with an average particle size of 20 microns. Antimony powder, after mixing evenly, is divided into two parts A and B and added to the storage tanks of RIM machine A and B respectively; in A...

Embodiment 2

[0024] The flame-retardant and toughened polydicyclopentadiene composite material of this embodiment is obtained by blending and polymerizing the following main raw materials in the following weight percentages: 100 parts of dicyclopentadiene, a number-average molecular weight of 150,000, and a bromine content. 3 parts of 60wt% brominated polypropylene and 0.5 part of antimony trioxide powder with an average particle size of 20 microns.

[0025] The flame-retardant and toughened polydicyclopentadiene composite material of this embodiment is prepared by the following method:

[0026] Under nitrogen protection, add 3 parts of brominated polypropylene with a molecular weight of 150,000 and 60% bromine to 100 parts of dicyclopentadiene at 75°C, stir and dissolve, and then add 0.5 part of dioxytrioxide with an average particle size of 20 microns. Antimony powder, after mixing evenly, is divided into two parts A and B, respectively, and added to the storage tanks of RIM machine A an...

Embodiment 3

[0028] The flame retardant and toughened polydicyclopentadiene composite material of this embodiment is obtained by blending and polymerizing the following main raw materials in the following weight percentages: 100 parts of dicyclopentadiene, a number average molecular weight of 150,000, a chlorine content 5 parts of 40wt% chlorinated polyethylene and 3 parts of antimony trioxide powder with an average particle size of 10 microns.

[0029] The flame-retardant and toughened polydicyclopentadiene composite material of this embodiment is prepared by the following method:

[0030] Under nitrogen protection, add 5 parts of chlorinated polyethylene with a molecular weight of 150,000 and 40% chlorine to 100 parts of dicyclopentadiene at 80°C, stir and dissolve, and then add 3 parts of dioxytrioxide with an average particle size of 10 microns. Antimony powder, after mixing evenly, is divided into two parts A and B, respectively, and added to the storage tanks of A and B of the RIM ma...

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Abstract

The invention discloses a flame-retardant toughened polydicyclopentadiene composite material, which is prepared by blending and polymerizing the following main raw materials in parts by weight: 100 parts of dicyclopentadiene, 2-10 parts of halogenated polyolefin of which the halogen content is more than 40 percent by weight, 0.5-10 parts of antimonous oxide, 0-2 parts of an antioxidant and 0-2 parts of a pigment, wherein the halogenated polyolefin is chlorinated polyethylene, chlorinated polypropylene, chlorinated ethylene propylene diene monomer, chlorinated chloroprene rubber, chlorinated natural rubber, bromized polyethylene, bromized polypropylene, bromized ethylene propylene diene monomer or bromized natural rubber. In the flame-retardant toughened polydicyclopentadiene composite material disclosed by the invention, the halogenated polyolefin and the dicyclopentadiene are blended and polymerized, so that the toughness of the composite material can be improved, and the impact strength can be increased by over 25 percent; and moreover, the a halogen on the halogenated polyolefin can react with added antimonous oxide during combustion to generate SbX3 (X is a halogen) with a flame-retardant effect, so that the flame retardance of the composite material is enhanced greatly, and the limited oxygen index is increased by over 20 percent.

Description

technical field [0001] The invention relates to a flame-retardant and toughened polydicyclopentadiene composite material, and also relates to a preparation method of the composite material. Background technique [0002] Polydicyclopentadiene (PDCPD for short) is an engineering plastic with good comprehensive properties, which is polymerized from monomer dicyclopentadiene under the action of catalyst. The DCPD monomer adopts a two-component catalytic system, that is, a two-component catalytic system with tungsten and molybdenum complex as co-catalyst and alkyl aluminum or alkyl zinc as co-catalyst. Through ring-opening shift polymerization (ROMP) and reaction Injection molding (RIM) process results in high impact cross-linked PDCPD. The material has both high impact resistance and high flexural modulus, as well as good dimensional stability, acid and alkali resistance, excellent coating, and electrical insulation properties. RIM can be used for one-step rapid prototyping to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L45/00C08L23/28C08L15/02C08K3/22C08F132/08C08F4/69
Inventor 张玉清刘翠云高喜平卢敏郭萌谢英波
Owner HENAN UNIV OF SCI & TECH
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