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.
ELECTRET AND ELECTROSTATIC INDUCTION CONVERSION DEVICE
申请人:Asahi Glass Company Limited
公开号:EP2330159A1
公开(公告)日:2011-06-08
To provide an electret having high stability with time and thermal stability of retained electric charge and having excellent charge retention performance, and an electrostatic induction conversion device comprising such an electret.
An electret obtained from a composition comprising a compound (A) having a molecular weight of from 50 to 2000 and having at least two polar functional groups, and a polymer (B) having a number average molecular weight of more than 2000 and having reactive functional groups reactive with the above polar functional groups. An electrostatic induction conversion device comprising such an electret.
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.