PERFLUORO-ELASTOMER COMPOSITIONS Russian patent published in 2010 - IPC C08K5/14 C08J3/24 C08F14/18 C08F214/18 C08L27/12 

FIELD: chemistry.

SUBSTANCE: described is a cross linking system for cross linking perfluoro-elastomers hardened using a peroxide method and having improved thermal stability at high temperatures above 300°C and below 350°C, containing the following: bis-olefin as a cross linking agent with formula: where R₁, R₂, R₃, R₄, R₅, R₆, identical or different from each other, represent H or C₁-C₅alkyls; Z represents a straight or branched C₁-C₁₈ alkylene or cycloalkylene radical, optionally containing oxygen atoms, preferably at least partially fluorinated or (per)fluoropolyoxyalkylene radical; amount of bis-olefin, expressed as a percentage of total mass of the polymer, ranges from 0.6% to 1.8%; peroxides for peroxide hardening, capable of generating radicals when heated, in amount ranging from 0.2% to 1.3% of the weight of the polymer. Also described are perfluoro-elastomers which are hardened using a peroxide method with such a cross linking system, and industrial products made with hardened perfluoro-elastomers.

EFFECT: reduced expenses of making the product.

23 cl, 6 ex, 1 tbl