Reference

Optical coating composition and application of composition to plastic optical lens

All Rights Reserved. Optical coating composition and application of composition to plastic optical lens. Treadway, Gerald D. (USA ). U.S.Chemicals with cas numbers 74309-76-5 and 3047-32-3 also play role. Pat. Appl. Publ. US 2007021523 A1 25 Jan 2007,11pp. (English). (United States of America). CODEN: USXXCO. INCL: 522071000. APPLICATION: US 2005-188549 25 Jul 2005. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Section cross-reference(s): 38 Coating compns. yielding cured coatings exhibit excellent abrasion-resistance and hardness for use on polymeric substrates such as the front side of optical lenses. The compns. include the hydrolysis product of an epoxy-functional alkoxy silane, a viscosity-reducing amt. (￡50 wt.%) of a monomeric (silanol free) epoxy functional epoxy silane, and colloidal SiO2 in an amt. sufficient to improve abrasion resistance, compared to a compn. lacking the colloidal SiO2. A Base resin of A 187 hydrolyzate, A 187, SiO2, and A 1630 coupling agent 20.0, Uvacure 1502 5.0, Cyracure 6974 photoinitiator 1.5, and BYK 307 0.05 g was spin coated onto a flat primed polycarbonate panel and UV cured. Samples provided a haze value 1.1-2.0% and Taber Abrasion (test using the CS 10 wheels, 500 cycles) 500 g. .

Photocrosslinking polymers bearing oxetane groups

All Rights Reserved. Photocrosslinking polymers bearing oxetane groups. Thermolysis and dissolution in water. Okamura, Haruyuki; Tajima, Yoshimi; Shirai, Masamitsu (Dep. Appl. Chem., Osaka Prefecture University, Sakai 599-8531, Japan). Nettowaku Porima, 27(1), 2-9 (Japanese) 2006 Gosei Jushi Kogyo Kyokai. CODEN: NPORF2. ISSN: 1342-0577. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Three kinds of polymers or oligomers having both an oxetane moiety and a sulfonate ester linkage in a monomer unit were synthesized. The polymers or oligomers were photocrosslinkable when irradiated in the presence of a photoacid generator. 3047-32-3 and 909114-63-2 are also in the experiment. The resulting crosslinked polymers and oligomers became sol. in water after thermolysis. Their dissoln. into water was strongly affected by the mol. wt. of the polymers or oligomers and the structure of photoacid generators used. .