| 摘要 |
1,255,211. Coated steel panels. COATES BROS. & CO. Ltd. 6 Feb., 1969 [8 Feb., 1968], No. 6421/69. Heading B2E. [Also in Divisions C3 and C7] Substrates are coated with compositions containing a heat-hardenable copolymer prepared by copolymerising a monomeric hydroxygroup containing mono-unsaturated bimolecular reaction product of maleic anhydride and a polyhydric alcohol with a copolymerisable material comprising acrylamide and/or methacrylamide and condensing the copolymerisation product with formaldehyde and a monohydric alcohol. In the Examples steel panels are coated.
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