Halogen-free flame-retardant modified hydrocarbon resin and preparation method thereof

Abstract

The invention discloses a halogen-free flame-retardant modified hydrocarbon resin and a preparation method thereof. The preparation method is characterized in that hydrocarbon resin, a phosphate flameretardant containing double bonds, an initiator and a solvent are mixed and reacted through a micro-channel reactor, and part of the solvent is removed to obtain the halogen-free flame-retardant modified hydrocarbon resin. The preparation method specifically comprises the following steps: mixing the hydrocarbon resin, the phosphate flame retardant containing double bonds and the solvent to obtaina liquid material A; mixing an initiator and a solvent to obtain a liquid material B; and introducing the liquid material A and the liquid material B into a micro-channel reactor with the temperatureof 70-150 DEG C by using two feeding pipes, carrying out mixed reaction on the liquid materials in the micro-channel reactor, then feeding the liquid materials into a cooling pipe, cooling, discharging, putting the liquid materials into a vacuum tank, and pumping out part of the solvent to obtain the halogen-free flame-retardant modified hydrocarbon resin. The halogen-free flame-retardant modified hydrocarbon resin has the characteristics of uniform molecular weight distribution, high phosphorus content, high vinyl content, halogen-free high-efficiency flame retardancy and the like, and is suitable for being used as a raw material for a high-frequency high-speed copper-clad plate.

Description

technical field [0001] The invention belongs to the halogen-free flame retardant modification of organic compound hydrocarbon resin and its preparation, and relates to it. The present invention is a halogen-free flame retardant modified hydrocarbon resin and a preparation method thereof. The halogen-free flame retardant modified hydrocarbon resin has the advantages of uniform molecular weight distribution, high phosphorus content, high vinyl content, halogen-free high-efficiency flame retardant, etc. It is especially suitable for use as a raw material for high frequency and high speed copper clad laminates. Background technique [0002] The vision of 5G is that information is at your fingertips and everything is connected at your fingertips. Its technical essence is the interconnection of everything and ultra-low latency. The time delay is shortened from the original 70ms to 1ms, which requires the copper clad laminate and its raw materials as the base material to have the ...

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Problems solved by technology

However, the use of brominated flame retardants will release highly corrosive hydrogen bromide gas during combustion, which will cause harm to human health and the ecological environment.

Although the use of phosphorus-containing and nitrogen-containing flame retardants is relatively friendly to the environment, they are basically additive types, which have poor compatibility with the substrate, which will affect the electrical and mechanical properties of the board, and the flame retardant effect is poor, Problems such as easy migration and serious droplet phenomenon

In addition, although the allylphenoxycyclotriphosphazene or vinylphenoxycyclotriphosphazene mentioned in the patent CN102977551A can be used as a reactive flame retardant to react with hydrocarbon resins, but due to the phenoxycyclotriphosphazene The nitrile group has a large volume hindrance, and only a small part of the flame retardants form polymers through the reaction of double bonds with hydrocarbon resins to achieve the purpose of flame retardancy. The double bonds of most flame retardants fail to combine with hydrocarbon resins. The resin reacts and eventually becomes an additive flame retardant, which will also lead to a decrease in the mechanical properties of the sheet, high dielectric constant and dielectric loss, and unstable flame retardant effect

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