| abstract |
A resinous composition for powder coating comprises (A) an acrylic resin and (B) a hardener characterised in that n the acrylic resin is composed of (a) t-butyl methacrylate (TBMA) and/or t-butyl acrylate (TBA), (b) an ethylenically unsaturated monomer having a reactive functional group and (c) one or more ethylenically unsaturated monomer(s) other than (a) or (b) and which is (are) non-reactive with the reactive functional group of (b); and has a reactive functional group content of from 0.0010 to 0.0046 mol per gram of resin, a glass transition temperature (Tg) of from 30 to 100°C, and a number average molecular weight of from 1000 to 20000; and n the hardener has in its molecule two or more functional groups being reactive with the reactive functional group present in the acrylic resin. |