Abstract: The present invention relates to compatible blends of, per se incompatible, thermoplastic molding compositions, to methods for the production thereof, and to the use of the blends according to the present invention to produce films, fibers and molded articles.

Abstract: The present invention relates to the invention of a masticating agent for the mastication of natural and synthetic rubbers, wherein the masticating agent is a dialkyl polysulfide, which is toxicologically acceptable and has very good masticating properties.

Abstract: The invention relates to rubber compounds based on rubber particles and phosphoryl polysulfides, as well as to vulcanizates or shaped articles prepared therefrom. The addition of phosphoryl polysulfides improves the strengthening effect of the rubber particles and the level of the mechanical properties, without lowering the resilience of the vulcanizates prepared therefrom.

Abstract: This invention relates to a process for the production of dithiophosphoric acid poly-sulfide mixtures, which is characterized in that dithiophosphoric acid disulfides are reacted with sulfur at elevated temperatures. The dithiophosphoric acid polysulfide mixtures produced using the process according to the present invention are used as sulfur donors for the vulcanization of natural and synthetic rubbers and in the latex vulcanization of natural and synthetic rubber latex.

Abstract: The present invention relates to vulcanizable rubber mixes which, apart from the rubbers, contain O,O-bis-(alkyl)-dithiophosphoric acid polysulfides and primary and/or secondary amines, which are characterized in that they may be vulcanized without release of nitrosamines with a high crosslink density and a high proportion of short sulfur bridges.

Abstract: The present invention relates to a catalyst system for the production of polyurethane comprising catalysts for polyurethane formation and sterically hindered carbodiimides, which system is capable of lessening the “fogging” problem in the production of polyurethane materials, without impairing in particular the aging properties of the polyurethane materials thus produced.

Abstract: The present invention concerns new organic silicon networks, their production process and use in silica-containing rubber compounds and vulcanizates manufactured from them.

Abstract: The present invention provides a process for inhibiting the emission of hydrogen sulfide and/or mercaptans from sulfurized organic compounds, which generally contain a high proportion of sulfur by treating the sulfurized organic compounds with organic hydroperoxides.

Abstract: The invention relates to carbodiimide-based block copolymers, a method of preparing them and also their use as hydrolysis stabilizers in ester-group-containing polymers. The advantages of the block copolymers according to the invention are, in particular, their high efficiency at low dosage as hydrolysis protection in ester-group-containing polymers, and also their nontoxic behavior, their high thermal stability and their good compatibility during incorporation in the polymeric matrix of the polymers to be protected.

Abstract: The present invention provides a process for the esterification of unsaturated carboxylic acids with unsaturated alcohols, which is characterized in that esterification is performed in the presence of sterically hindered phenols and partially esterified phosphoric acids. The process according to the invention in particular avoids discoloration (blackening) of the resultant esterification products.

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: This invention relates to the use of arylguanidinium xanthogenates as vulcanization accelerators, to a process for the production thereof and to the arylguanidinium xanthogenates.

Abstract: Aromatic maleimides can be prepared by reacting corresponding aromatic amines with maleic anhydride in the presence of a solvent mixture of halogenated hydrocarbon and a dipolar aprotic solvent, with the addition of acid and a polymerization inhibitor.

Abstract: Aqueous external release agent for pneumatic tires which contains a fatty alcohol polyglycol ether and conductive carbon black, for establishing the electrical resistance of the tire.

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: Polyurethane elastomers with reduced gas permeability are prepared by reaction of:a) diisocyanates,b) compounds with a molecular weight of 500 to 10,000 having at least two hydrogen atoms that are reactive towards isocyanates,c) compounds with a molecular weight of 61 to 499 having at least two hydrogen atoms that are reactive towards isocyanates, and optionallyd) further auxiliaries and additives,characterized in thati) the ratio of the isocyanate groups in a) to the sum of the isocyanate-reactive groups in b) and c) is between 1:0.80 and 1:1.05 (isocyanate:isocyanate-reactive), andii) the compound b) contains 3 to 15% by wt.

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: An external release agent is disclosed which contains:I. Light Pigments:10 to 60 parts by weight of amorphous silica gel powder, optionally containing up to approximately 65% by weight of water of crystallization and having an average particle diameter of around 3 to 50 .mu.m;0 or 0.1 to 1.5 parts by weight of pyrogenic silica with an average particle diameter of around 12 nm;0 or 0.2 to 2.0 parts by weight of polypropylene wax.II. Colored Pigments:0.5 to 5.0 parts by weight of pigment-quality carbon black.III. Binders0.3 to 3 parts by weight of fatty acid methyl tauride, Na salt;or0.5 to 6.0 parts by weight of an aqueous polyethylene dispersion.IV. Carrier Liquid:45 to 66 parts by weight of water;0 to 5 parts by weight of isopropanol;0 to 5 parts by weight of foam inhibitor;0.05 to 0.1 parts by weight of thickener;0.01 to 0.1 parts by weight of biocide.

Abstract: Lubricant base materials containing ester groups may be stabilised by adding a small quantity of carbodiimides and the service life of lubricants manufactured therefrom may be decisively extended.

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.