Epichlorohydrin rubber composition

Abstract

The invention relates to an epichlorohydrin rubber composition, which comprises homopolymerized epichlorohydrin rubber, copolymerized epichlorohydrin rubber, diethyl(o-)phthalate (DEP), fast extruding furnace black N550, silicon dioxide, stearamide, polyethylene wax, anti-agent agent MB, anti-aging agent RD, metal magnesium oxide, 1,2-hexylenethiourea (NA-22) and dibenzothiazole disulfide. Besides high performance in heat-resistance and oil-resistance aspects, the rubber has further improved metal corrosion resistance. The rubber is not corroded when kept at 130 DEG C for 720 hours, so the corrosion resistance of the rubber is improved greatly.

Description

Ether rubber composition technical field The invention relates to the technical field of rubber hoses, in particular to a metal corrosion-resistant epichlorohydrin rubber composition. Background technique Chlorine ether rubber is a saturated aliphatic polyether with ether bonds in the main chain and chloromethyl groups in the side chains. This unique chemical structure determines that it has many special properties. The ether bond in the main chain makes it have good heat aging resistance and ozone resistance; the polar side chain chloromethyl group makes it have excellent oil resistance and air permeability resistance. Chlorine ether rubber is a kind of special rubber, which has a very wide range of uses due to its excellent comprehensive properties such as heat resistance and oil resistance. However, because chloroether rubber contains chlorine, it is corrosive to metal molds (generally made of metal copper and iron), and the mold or metal joints will be in contact wit...

AI Technical Summary

Problems solved by technology

However, because chloroether rubber contains chlorine, it is corrosive to metal molds (generally made of metal copper and iron), and the mold or metal joints will be in contact with chloroether rubber for a long time (generally 135 ° C × 360 hours), and black spots will appear. Corrosion, even if the metal mold or metal joint is chrome-plated, it will not help, so the spots formed by the long-term contact between the epichlorohydrin rubber and the mold or metal joint will make the mold uneven, and the surface of the produced product will have defects. The spots formed by the long-term contact between the rubber hose and the metal joint will cause the air or medium to extend along the spots and cause leakage, thus affecting the use function of the hose