Abstract: A new group of polymer flow controllers for powder resin lacquer is provided. The polymer flow controllers contain groups ##STR1## wherein n and m are numbers from 0 to 1000 with the sum of n+m=2-1000 and R.sub.1 and R.sub.2 are independently hydrogen, an optionally hydroxy substituted hydrocarbon group containing 1 to 36 carbon atoms aryl and aralkyl optionally substituted in the aromatic nucleus, or R.sub.3 --(--O--C.sub.2 H.sub.4 --)--.sub.p O--CH.sub.2 -- wherein R.sub.3 is an alkyl or alkenyl group containing 1 to 18 carbon atoms and p is a number of 1 to 10.

Abstract: A magnesium-treated, decarburizingly-annealed cast iron material includes 4% or less carbon by weight, 2% or less silicon by weight, at least 0.010% magnesium by weight, and at least 0.001% sulphur by weight, the remainder being iron. The cast iron material is subjected to a first annealing phase in which graphitic carbon portions are formed. Thereafter, the cast iron material undergoes a second annealing phase during which certain of the graphitic carbon portions are burned out. The resultant structure includes cavities in place of certain of the graphitic carbon portions in a substantially ferritic matrix. The resultant cast iron material exhibits good welding and cutting properties with little susceptibility to hard cracking.