Modified chlorinated polypropylene adhesive

Abstract

The modified chlorinated polypropylene adhesive consists of chlorinated polypropylene 100 weight portions, glycidol acrylate 0.05-0.2 weight portions, additive 0.05-0.4 weight portions, initiator 0.1-0.5 weight portions, and tackifier 5-15 weight portions. The chlorinated polypropylene has chlorine content of 25-45 wt%; the additive is styrene, dimethyl acetamide or dimethyl sulfoxide; the initiator is bibenzoyl peroxide or diisopropyl benzene peroxide; and the tackifier is petroleum resin, rosin ester or terpene. The adhesive is ropy, and may be painted or extruded into film of 0.1-0.5 mm thickness when used. It has excellent adhering performance on metal, non-polar polymer, etc. and may be used widely.

Description

technical field [0001] The invention relates to a modified chlorinated polypropylene adhesive, in particular to a chlorinated polypropylene adhesive with strong adhesion to metal aluminum, steel, etc., and non-polar polymers such as polyethylene and polypropylene. Background technique [0002] Adhesives for metal-metal, aluminum-plastic composite pipes, and aluminum-plastic composite panels often use polyethylene grafts, ethylene-unsaturated acid or ester copolymers, etc. The bonding strength of polymers is not high, and the cost of ethylene-unsaturated acid or ester copolymers is high. More and more companies hope to use a new bonding material with high bonding strength and low price to replace the existing ones. Applications. [0003] Polypropylene materials are used as adhesives, and there are three main types of polypropylene provided: [0004] The first type is random polypropylene, whose properties are greatly affected by molecular weight and cry...

AI Technical Summary

Problems solved by technology

[0005] The second type is polypropylene melt grafting, whose performance is greatly affected by peroxide initiators. Peroxides can cause polypropylene to undergo reactions such as crosslinking, degradation, and grafting. Due to the high temperature of polypropylene melt grafting, in Under the action of peroxide initiator, it is easy to cause degradation of polypropylene, and polypropylene is also easy to cross-link, and the grafting rate of polypropylene is not high

Chinese patent CN 1 016480 introduces this adhesive as polypropylene / aluminum composite pipe and polypropylene / steel composite pipe adhesive, but the preparation and application of this adhesive requires a higher temperature

But these methods all adopt the method of synthesis, the reaction conditions are difficult to control, and the reaction process is complicated.