US 7,009,032 B2 · Sulfide-containing polythiols

Abstract

The present invention relates to sulfide-containing polythiols and their methods of preparation. Sulfide-containing polythiols can have a variety of uses and applications. The sulfide-containing polythiols of the present invention can be especially useful in polyurethane compositions for the manufacture of ophthalmic lenses.

Claims1

Dependent claims

A composition comprising one or more sulfide-containing polythiols chosen from materials represented by the following structural formulas:

Dependencies are inferred from the claim text.

Facts

Application

10/725,034Filed 2 Dec 2003 · us provisional application

Priority

20 Dec 2002

Published

US 2004/0143090 A122 Jul 2004

Granted

7 Mar 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

C08G 75/10
Polythioethers: from sulfur or sulfur-containing compounds and aldehydes or ketones
C07D 339/06
Five-membered rings: having the hetero atoms in positions 1 and 3, e.g. cyclic dithiocarbonates
C07D 339/08
Heterocyclic compounds containing rings having two sulfur atoms as the only ring hetero atoms: six-membered rings
C08G 18/12
Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step: using…

Sulfide-containing polythiols

Life of this patent

Abstract

Claims1

Sulfide-containing polythiols

Life of this patent

Abstract

Claims1