Abstract: The invention relates to processing additive mixtures comprising at least one polyol, amide and/or carboxylic acid, optionally auxiliaries for crystallization and at least one organic ammonium salt. Said processing additive mixtures allow the optimization of the vulcanization behavior of rubber mixtures and the properties of vulcanizates obtained by said vulcanization.

Abstract: The present invention relates to a composition obtainable by mixing to incorporate at least one microgel (B) that has been crosslinked by means of free-radical generators photochemical by using a wavelength>0.1 ?m and/or thermally and that contains hydroxy groups and that is based on polybutadiene-acrylonitrile copolymers (NBR) into polyvinyl chloride (PVC) in an extruder, to processes for production thereof and to use thereof for reproduction of transparent thermoplastically processable molded items, and also to molded items produced from the said compositions.

Abstract: The invention relates to processing additive mixtures comprising at least one polyol, amide and/or carboxylic acid, optionally auxiliaries for the crystallization and at least one organic ammonium salt. Said processing additive mixtures allow the optimization of the vulcanization behavior of rubber mixtures and the properties of vuloanizates obtained by said vulcanization.

Abstract: The present invention relates to a mixture which can be used as vulcanization accelerator, to a process for producing the mixture and to use of the mixture, to vulcanizates which comprise the said mixtures or which comprise corresponding individual constituents of the mixture, and also to vulcanizates which are produced with use of the said mixture.

Abstract: The present invention relates to a composition obtainable by mixing to incorporate at least one microgel (B) that has been crosslinked by means of free-radical generators photochemical by using a wavelength>0.1 ?m and/or thermally and that contains hydroxy groups and that is based on polybutadiene-acrylonitrile copolymers (NBR) into polyvinyl chloride (PVC) in an extruder, to processes for production thereof and to use thereof for reproduction of transparent thermoplastically processable moulded items, and also to moulded items produced from the said compositions.

Abstract: The invention relates to a wiper rubber for windshield wipers, which contains at least one rubber component that is cured by vulcanization, the material of the wiper rubber containing, at least in the unvulcanized state, a combination of a cross-linking agent with sulfur and/or with a sulfur donor.

Abstract: The present invention relates to a mixture which can be used as vulcanization accelerator, to a process for producing the mixture and to use of the mixture, to vulcanizates which comprise the said mixtures or which comprise corresponding individual constituents of the mixture, and also to vulcanizates which are produced with use of the said mixture.

Abstract: The invention relates to a wiper rubber for windshield wipers, which contains at least one rubber component that is cured by vulcanization, the material of the wiper rubber containing, at least in the unvulcanized state, a combination of a cross-linking agent with sulfur and/or with a sulfur donor.

Abstract: This invention relates to a process for the production of masterbatches which contain short fibres or pulps and which may be used for the production of polymer compositions or rubber compositions.

Abstract: A vulcanization accelerator combination based on di-(C.sub.6 -C.sub.12 alkyl)dithiophosphates for vulcanizing non-polar rubbers, comprising the following components: (a) a di-(C.sub.6 -C.sub.12 alkyl)dithiophosphate; (b) one or more compounds selected from the group consisting of sulphenamides, thiazoles and carbamates; (c) sulfur and/or a sulfur donor; and (d) at least one additional accelerator compound having a specific chemical structure that is different from the chemical structure of component (a) and any of the compounds used as component (b) in said accelerator combination.

Abstract: Process for the production of polymer-bound rubber chemicals, characterized in that the rubber chemicals and optionally additives are finely dispersed in a low molecular weight polymerizable liquid, polymerization is then initiated, optionally after adding a further component which reacts with the polymerizable liquid to form a polymer, and the solid, homogeneous mixture of rubber chemicals and polymer so formed is optionally converted into a form suitable for use.

Abstract: Rubber chemical preparation consisting of or comprising rubber chemicals in finely divided form and a carrier liquid, in which the rubber chemical particles have a mean diameter (weight average d.sub.50) from 2 .mu.m to 20 .mu.m, preferably <10 .mu.m, and exhibit a very narrow diameter distribution corresponding to .delta.d.sub.10 -d.sub.90 .ltoreq.20 .mu.m, preferably <10 .mu.m.

Abstract: An .alpha.-tocopherol preparation is disclosed which contains 40 to 80% by weight tocopherol, 10 to 40% by weight EPM rubber and 10 to 50% by weight neutral silicate filler or acrylate polymer. The composition is added during vulcanization of rubber to inhibit nitrosamine formation.