Halogen-free flame-retardant dicyclopentadiene material and preparation method thereof

Abstract

The invention discloses a halogen-free flame-retardant dicyclopentadiene material and a preparation method thereof. The material consists of polydicyclopentadiene, flame retardant, modifier and catalyst, wherein the flame retardant is silane coupling agent, titanate coupling agent, aluminium zirconate coupling agent, organic chromium coupling agent, higher fatty acid and salt thereof, phosphate, unsaturated organic acid or organic ammonium salt modified aluminium hydroxide. The preparation method prepares the flame-retardant material by using reaction injection moulding. The oxygen index of the obtained material is 22 to 26 percent, and the horizontal combustion test can reach HB level; and the bending strength is 40 to 45MPa, the bending modulus is 1,400 to 1,700MPa, the tensile strength is 34 to 37MPa, the impact strength is 26-80kJ / m<2>, and the hardness is 74 to 76 Shaw D. The material does not contain halogen flame retardant, and has high flame-retardant performance and high mechanical property.

Description

technical field [0001] The invention relates to a flame-retardant polydicyclopentadiene material and a preparation method thereof. Background technique [0002] Polydicyclopentadiene material has excellent physical and mechanical properties and good chemical stability, especially suitable for making large structural parts. However, polydicyclopentadiene is composed of hydrocarbons containing unsaturated double bonds and is very flammable, which limits its application in many fields such as electronics, electrical appliances, transportation, and decorative materials. [0003] To improve the flame retardancy of polydicyclopentadiene materials, the following factors are usually considered: [0004] ①The flame retardant cannot react with dicyclopentadiene monomer, and has good compatibility with polydicyclopentadiene, without precipitation and migration effects; [0005] ②The flame retardant cannot affect the activity of the catalytic system; [0006] ③The flame retardant mus...

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Problems solved by technology

[0004] ①The flame retardant cannot react with dicyclopentadiene monomer, and has good compatibility with polydicyclopentadiene, without precipitation and migration effects;

Although this method has a good flame retardant effect, the use of halogenated flame retardants is increasingly restricted due to the release of a large amount of smoke and corrosive gases when the halogen compound is burned, which will cause secondary disasters.

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