Title:
SULFIDE-CONTAINING POLYTHIOL
Document Type and Number:
Japanese Patent JP2009167212
Kind Code:
A
Abstract:
To provide sulfide-containing polythiols and methods for preparation of the same.
The sulfide-containing polythiols can have a variety of uses and applications. The sulfide-containing polythiols can be especially useful in polyurethane compositions for the manufacture of ophthalmic lenses. In non-limited embodiments, the sulfide-containing polythiols can comprise 1,3-dithiolane and 1,3-dithian. The sulfide-containing polythiols comprising 1,3-dithiolane or 1,3-dithian can be obtained by reacting an asymmetric dichloroacetone with a polymercaptan and then reacting the reaction product with a polymercaptoalkylsulfide, a polymercaptan or their mixture.
Inventors:
BOJKOVA NINA
SMITH ROBERT A
SMITH ROBERT A
Application Number:
JP2009108405A
Publication Date:
July 30, 2009
Filing Date:
April 27, 2009
Export Citation:
Assignee:
PPG IND OHIO INC
International Classes:
C07D339/06; C07D339/08; C08G18/12; C08G18/38; C08G18/48; C08G18/66; C08G18/67; C08G75/02; C08G75/06; C08G75/10; C08L75/06; G02B1/04
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita
Takaaki Yasumura
Natsuki Morishita