Hydrophilic coatings and process for preparing the same

Details Hydrophilic coatings and process for preparing the same Hydrophilic coatings and process for preparing the same

1981-08-24

1983-08-16

Lusignan, Michael R.

Stock material or miscellaneous articles

Composite

Of silicon containing

427387, 427391, 428452, 428537, 524588, 524837, 528 33, 556457, 556458, 556459, B05D 302, B32B 904

Patent

active

043991939

ABSTRACT:
Hydrophilic coatings are obtained by applying to a substrate a composition containing an aqueous soluble organopolysiloxane which is capable of being crosslinked by the addition of Si-bonded hydrogen atoms to SiC-bonded aliphatic multiple bonds, and having at least one oxyalkylene unit bonded to a silicon atom and an aqueous soluble catalyst which promotes the addition of Si-bonded hydrogen atoms to the SiC-bonded aliphatic multiple bonds and thereafter crosslinking the organopolysiloxane by the addition of the Si-bonded hydrogen atoms to the SiC-bonded aliphatic multiple bonds to form a hydrophilic coating on the substrate. The aqueous soluble organopolysiloxane may be obtained from a mixture consisting of equal parts of a mixed hydrolysate, prepared from 1.7 moles of dimethyldichlorosilane, 1 mole of [acetoxy-(hexaethyleneoxy)propyl]-methyldichlorosilane and 0.3 mole of vinylmethyldichlorosilane, and a mixed hydrolysate prepared from 1 mole of dimethyldichlorosilane, 1 mole of [acetoxy(hexaethyleneoxy)-propyl]-methyl-dichlorosilane and 1 mole of methyldichlorosilane.

REFERENCES:
patent: 3819563 (1974-06-01), Takago et al.
patent: 4301215 (1981-11-01), Deubzer et al.
patent: 4311821 (1982-01-01), Weitemeyer et al.
patent: 4340090 (1982-07-01), Matsushita et al.

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