BUTYL RUBBER-BASED ELASTOMER MATERIAL FOR GAS MASK HOUSING Russian patent published in 2013 - IPC C08L23/00 C08L23/16 C08L23/22 

FIELD: chemistry.

SUBSTANCE: invention relates to butyl-rubber based elastomer material for a gas mask housing. The elastomer material contains sulphur as a vulcanisation agent, tetramethylthiuram disulphide (thiuram D) as a vulcanisation activator, zinc oxide as a vulcanisation accelerator, 2-mercaptobenzothiazole (captax) as a vulcanisation rate regulator, stearic acid as a plasticiser, as well as carbon as powdered filler, and is characterised by that it further contains polyisobutylene as a rubber mixture plasticising process additive, and as an antioxidant and stabiliser krafanyl-U, or acetonanyl-R (benzopyridine) of formula (C₁₂H₁₅N)_n, or naphtham-2, or a mixture of acetonanyl-R with 18-28 pts.wt naphtham-2, or a mixture of krafanyl-U with 32-40 pts.wt acetonanyl-R (benzopyridine), with the following ratio of components per 100 pts.wt butyl rubber: said vulcanisation activator 1.3-1.7; said vulcanisation accelerator 4.4-5.6; said vulcanisation agent 1.8-2.5; vulcanisation rate regulator 0.3-1.1; said powdered filler 40-50; polyisobutylene 4.8-10.6; said plasticisiser 0.8-2.4; said antioxidant and stabiliser 0.9-2.0.

EFFECT: elastomer material which provides given elasticity and fitting of the shape of the head of a rescuer, maintaining a given shape of the gas mask housing, sufficient gas impermeability and reliable protection of human skin from aerosol and droplet penetration of liquid chemical and harmful substances.

5 cl, 15 ex