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US 4,398,008 AGranted
Thick polyol (allyl carbonate) polymerizates and method of preparing same
AssigneePPG Industries, Inc.
InventorMichael S. Misura
Life of this patent
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Abstract
Disclosed is a method of preparing a thick casting of polyol (allyl carbonate) by preparing a monolithic, partially cured, first polymerizate of polyol (allyl carbonate), forming a pool of polyol (allyl carbonate) monomer in contact with the monolithic, partially cured, first polymerizate, and thereafter forming a thick, single phase polyol (allyl carbonate) polymer. Also disclosed is the polymer prepared therefrom.
Claims7
A method of forming a thick casting of polyol (allyl carbonate) comprising:
- (a) forming a monolithic rigid sheet comprising partially cured polymeric polyol (allyl carbonate);
- (b) forming a pool of polyol (allyl carbonate) monomer in contact with the monolithic rigid sheet of partially cured polymer;
- and
- (c) thereafter curing the monolithic rigid sheet of partially cured (monolithic polymerizate) polymer and the monomer in contact therewith whereby to form a single phase (second polymerizate) casting thicker than the monolithic rigid sheet.
1 more element
A method of forming a thick casting of polyol bis(allyl carbonate) comprising:
- (a) forming a monolithic rigid sheet having a fifteen second Barcol hardness of less than 20 and comprising partially cured polymeric polyol bis(allyl carbonate);
- (b) forming a pool of polyol (allyl carbonate) monomer in contact with the monolithic rigid sheet of partially cured polymer;
- and
- (c) thereafter curing the monolithic rigid sheet of partially cured polyol(allyl carbonate) and the polyol(allyl carbonate) monomer in contact therewith whereby to form a single phase casting having a fifteen second Barcol hardness greater than 28.
1 more element
Dependencies are inferred from the claim text.