Abstract: A method of coating heat sensitive materials with powder paint is described, which is based on repetitive heating cycles of paint coating by radiation example infrared, interspersed with cooling cycles, which there is a temperature difference between the paint coating and substrate such as to allow the filmation and subsequent curing of the paint without damaging the substrate.

Abstract: An oxidized polyethylene wax or other wax in the form of a salt with a metal selected from groups IB, IIB, IIA, IIIA, IIIB, VIB, VIIB and VIIIB of the Periodic Table of the Elements acts as a photoactivator in a polymer composition and degrades the latter. The quantity of the additive can vary from 0.1 to 2.0% by weight, relative to the weight of the composition. The additive can be added directly or, more suitably, via a masterbatch.

Abstract: Novel quaternary alkoxyalkylammonium compounds of the formula 1 ##STR1## in which R denotes C.sub.8 -C.sub.20 --, preferably C.sub.12 -C.sub.18 --, alkyl or C.sub.8 -C.sub.20 --, preferably C.sub.12 -C.sub.18 --, alkenyl, R.sub.1, R'.sub.1 and R".sub.1, which can be identical or different, denote methyl, ethyl or benzyl and at least one of the radicals R.sub.1, R'.sub.1 and R".sub.1 denotes a group of the formula --(C.sub.S H.sub.2S O).sub.x H,R.sub.2 and R.sub.3, which can be identical or different, denote methyl, ethyl or benzyl,a denotes 0 or 1, b denotes 0 or 1, of which either a or b has to be=1, m denotes 0 or 1, n denotes 2 or 3, p denotes 1, 2 or 3, S denotes 2 or 3, x denotes 1, 2, 3 or 4, and A denotes a halide, methosulfate, ethosulfate or methophosphate ion. These compounds are used as retarders and leveling agents in the dyeing of polyacrylonitrile and acid-modified polyester fibers.