Fluorinated diisocyanates of the general structure OCN(CH2)2(CF2)n(CH2)2NCO were prepared from alpha,omega-diiodoperfluoroalkanes by insertion of ethylene into the CF2-I bond, displacement of the iodo groups with azide, reduction of the resulting azide groups to amines, and phosgenation of the diamine.
A golf ball is disclosued, comprising: a core, the core having a diameter of 1.5 inches to 1.65 inches and a first coefficient of restitution of 0.8 or greater at 125 ft/s; an intermediate layer disposed about the core, the intermediate layer having a first Shore D hardness of 20 to 80 and comprising a blend of two or more ionomers; and an outer cover layer disposed about the intermediate layer; the outer cover layer having a thickness of 0.005 inches to 0.05 inches and a second Shore D hardness of 30 to 70, the outer cover layer being composed of a castable material formed from reactants comprising at least one fluorinated polyfunctional compound, wherein the golf ball has a second coefficient of restitution of 0.8 or greater at 125 ft/s and a compression of 50 to 120.
US4942164A
申请人:——
公开号:US4942164A
公开(公告)日:1990-07-17
US7312298B2
申请人:——
公开号:US7312298B2
公开(公告)日:2007-12-25
US7358320B2
申请人:——
公开号:US7358320B2
公开(公告)日:2008-04-15
Synthesis of fluorinated diisocyanates
作者:A. A. Malik、D. Tzeng、P. Cheng、K. Baum
DOI:10.1021/jo00009a021
日期:1991.4
Fluorinated diisocyanates of the general structure OCN(CH2)2(CF2)n(CH2)2NCO were prepared from alpha,omega-diiodoperfluoroalkanes by insertion of ethylene into the CF2-I bond, displacement of the iodo groups with azide, reduction of the resulting azide groups to amines, and phosgenation of the diamine.