Abstract: Mosquito coils are resistant to breakage, light, flat and ensure a good active substance yield if they consist of a wood-chip and/or fiber material of a density of only 0.4 to 0.7 kg/dm.sup.3 and preferably have a thickness of 1 to 4.5 mm, the active substance being applied to the spiral (1) as a layer (2).

Abstract: Ethers of 1,2-disubstituted tartaric acid esters proved to be excellent initiators for thermally initiatable radical polymerization reactions. They show a high reactivity even in low concentrations and yield thoroughly hardened products.

Abstract: Substituted tartaric acids and tartaric acid derivatives have proved to be highly reactive initiators for starting radical polymerization resp. hardening reactions of unsaturated compounds and mixtures of compounds, particularly unsaturated polyester resins.

Abstract: A process for the copolymerization of ethylene at pressures of from 200 to 3500 atms and temperatures of from 130.degree. to 300.degree. C., wherein silyl ethers are used as initiators.

Abstract: A process for the polymerization of ethylene and optionally further .alpha.,.beta.-unsaturated monomers at temperatures of from 100.degree. to 350.degree. C. and at pressures of from 600 to 3500 in the presence of 1,2 diaryl glycols atoms or 1,2-diaryl glycol alkyl ethers as initiators.

Abstract: Amines, amides and amidines work as accelerators for polymerization reactions with initiators of the 1.2-diphenyl ethane type.

Abstract: Mixtures active as initiators for radical polymerization reactions comprising(1) from 1 to 99% by weight of a substituted diphenyl ethane; and(2) from 99 to 1% by weight of an organic peroxide,and a process for desensitizing organic peroxides.

Abstract: An improvement in a process for the preparation of a pinacol of the formula ##STR1## wherein R.sup.1 and R.sup.2 are identical or different and represent optionally substituted aliphatic, cycloaliphatic, araliphatic or an aromatic hydrocarbon radical by reducing a ketone of the formula ##STR2## wherein R.sup.1 and R.sup.2 have the abovementioned meanings with a base metal, the improvement comprising carrying out the reduction in the presence of an organic halogen compound and in the presence of a phosphoric acid amide, phosphoric acid ester and/or carboxylic acid amide.

Abstract: Mixtures obtained by reaction of an .alpha.-arylketone or of an arylaldehyde and the equivalent amount of a base metal in an inert aprotic solvent with a di-, tri- or tetrachlorosilane or a chlorinated polyorganosilane or -siloxane work as initiators for free radical-initiated polymerization reactions.

Abstract: Certain new monosilyl ethers have virtually no effect on the storage stability of unsaturated polyester resins at temperatures up to 70.degree. C, but at higher temperatures effect rapid curing to give polymers which are substantially monomer-free.