| 摘要 |
1,262,948. Coatings. MOBAY CHEMICAL CO. 30 May, 1969 [31 May, 1968], No. 27413/69. Heading B2E. [Also in Division C3] Block copolymers of ethylenically unsaturated monomers and certain polyisocyanates are reacted with compounds containing active hydrogen atoms and the resultant polyurethanes may be used as a coating. In Example 6 a block copolymer of styrene and 2, 4-tolylene diisocyanate is reacted with a polyesterdiol of adipic acid, diethyleneglycol and trimethylolpropane and the polyurethane coated on iron phosphate foretreated cold rolled steel and baked. |
