Solventless organosilicon coating/impregnating compositions

Details Solventless organosilicon coating/impregnating compositions Solventless organosilicon coating/impregnating compositions

1982-08-10

1983-09-13

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

428443, 428451, 428452, 428447, 528 17, 528901, C08G 7706

Patent

active

044043481

ABSTRACT:
Solventless organopolysiloxane compositions are well adopted as coating/impregnating materials for a wide variety of substrates to provide, e.g., water repellant/solvent resistant gaskets and various substrates possessing enhanced non-stick characteristics, are comprised of (i) an .alpha.,.omega.-dihydroxypolydiorganopolysiloxane having a viscosity, measured at 25.degree. C., ranging from 5 to 100,000 mPa.s and consisting essentially of recurring units of the formula Z.sub.2 SiO (ii) a polyorganopolysiloxane having from 1.60 to 1.90 organic radicals per silicon atom, having a viscosity ranging from 30 mPa.s at 25.degree. C. to 3,000 mPa.s at 25.degree. C., having from 0.2 to 10% of hydroxyl groups and consisting essentially of the recurring units RSiO.sub.1.5, R.sub.2 SiO and R.sub.3 SiO.sub.0.5 (iii) a crosslinking agent containing a polyalkoxysilyl group; and (iv) a catalytically effective amount of an organic iron or zirconium catalyst soluble in the organopolysiloxane medium.

REFERENCES:
patent: 3957704 (1976-05-01), Smith et al.
patent: 4239877 (1980-12-01), Roedel

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