Hydrophilic, crosslinked, modified organopolysiloxanes and proce

Details Hydrophilic, crosslinked, modified organopolysiloxanes and proce Hydrophilic, crosslinked, modified organopolysiloxanes and proce

1980-01-17

1982-03-30

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

264 22, 264 26, 351160H, 525479, 526279, 528 15, 528 16, 528 17, 528 20, 528 21, 528 23, 528 24, 528 26, 528 31, 528 32, C08G 7706

Patent

active

043225179

ABSTRACT:
Hydrophilic, crosslinked organopolysiloxanes are obtained from the polymerization of hydroxyalkylmethacrylate and/or hydroxalkylacrylate in the presence of an organopolysiloxane containing at least 40 mol percent of monoorganosiloxane units.
These hydrophilic, crosslinked, modified organopolysiloxanes are prepared by polymerizing hydroxyalkylmethacrylate and/or hydroxyalkylacrylate in the presence of free radical initiators and an organopolysiloxane containing at least 40 mol percent of monoorganosiloxane units which can be crosslinked or has been crosslinked by the condensation reaction in the presence of a condensation catalyst, the amount and type of condensation catalyst and/or catalytic system, including the inhibitor for the polymerization of the hydroxyalkylmethacrylate and/or hydroxyalkylacrylate, is selected so that the crosslinking of the organopolysiloxane which is substantially uniformly distributed in the hydroxyalkylmethacrylate and/or hydroxyalkylacrylate is initiated and preferably completed before the polymerization of the hydroxyalkylmethacrylate and/or hydroxyalkylacrylate is completed.

REFERENCES:
patent: 3577264 (1971-05-01), Nordstrom
patent: 3650812 (1972-03-01), Nordstrom
patent: 3668272 (1972-06-01), Sekmakas
patent: 4153641 (1979-05-01), Deichert et al.
"Molding Contact Lenses", Precision-Cosmet Digest, Sep., 1960, vol. 1, No. 2, pp. 1 to 6.

Affiliated with

Also associated with

Rating

Hydrophilic, crosslinked, modified organopolysiloxanes and proce does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydrophilic, crosslinked, modified organopolysiloxanes and proce, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrophilic, crosslinked, modified organopolysiloxanes and proce will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-383184