Abstract: A rubber composition comprising rubber, novolak-type phenolic resin and carbon black is very rigid and is adapted to be used as a bead filler rubber of a tire. Tires using the rubber composition are excellent in the high speed performance, lateral rigidity, ride feeling and durability.

Abstract: A modified rubber composition comprising a blend of (a) a modified rubber obtained by reaction a rubber having an unsaturated carbon linkage with an organic compound having a carboxyl group and an aldehyde group in the presence of an acid catalyst, and (b) carbon black.

Abstract: A rubber composition having an improved adhesion to steel cord comprising(a) a rubber vulcanizable with sulfur,(b) at least one reinforcing filler containing between 10 and 50% by weight of active silicic acid,(c) a vulcanization agent selected from the group consisting of sulfur and a sulfur donor,(d) at least one phenol resin derived from at least one mono- or polyhydric phenol and aldehyde, wherein at most 30% of the phenol component consists of a mono-nuclear polyhydric phenol,(e) a compound of a metal being capable of having various valencies and(f) a methylene donor and a rubber article prepared from said composition.

Abstract: A vulcanizable rubber mixture for producing a leather-hard rubber, which mixture is suitable for use in making a composite profile produced by simultaneous extrusion and vulcanization of two different grades of rubber. The composite profile has a region of leather-hard rubber which serves as the clamping part, and a second zone made integrally therewith, of ordinary soft, rubber-elastic rubber. The vulcanizable rubber mixture for producing a leather-hard mixture contains 20 to 40 parts by weight of polar rubber, i.e. rubber which splits off acid groups under vulcanizing conditions, e.g. polychloroprene, and 60 to 80 parts non-polar rubber, i.e. will not split off said groups, e.g. nitrile rubber, 15 to 50 parts phenolformaldehyde reinforcement resin, 0.5 to 4 parts hexamethylene tetramine, and 0.5 to 3 parts sulfur. Conventional accelerators and zinc oxide are added.

Abstract: A heat stable molded phenolic resin article comprising, in percent by weight, from about 20 to about 70 percent of an oil unmodified phenolic resin, from about 3 to about 25 percent of an acrylonitrile-butadiene elastomer, and from about 15 to about 70 percent of a silicate mineral. Also a molding composition comprising, in percent by weight, from about 20 to about 70 percent of an oil unmodified phenol-aldehyde thermosettable resin, from about 3 to about 25 percent of an acrylonitrile-butadiene elastomer, and from about 15 to about 70 weight percent of a silicate mineral.

Abstract: Coating compositions contain pigment dispersants wherein the dispersant is the polymerization product of (i) an alkyl methacrylate having from 3 to 8 carbon atoms in the alkyl group, (ii) a hardening monomer selected from the group consisting of a styrene, methyl methacrylate, ethyl methacrylate and mixtures thereof, (iii) an ethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid and mixtures thereof or a monomer having a double bond alpha-beta to a carbonyl group and which provides carboxyl functionality when reacted with water, alcohol, amine or anhydride, (iv) a monomer having a double bond alpha-beta to a carbonyl group and at least one hydroxyl group or a monomer which provides such groups when further reacted with an acid or an epoxide, and (v) a compound providing an amine or amine salt functional moiety.

Abstract: Disclosed is a high hardness rubber composition having a hardness of at least 92, which comprises 100 parts by weight of a rubber, 55 to 95 parts by weight of soft black having an average particle size of 40 to 80 millimicrons, 5 to 30 parts by weight of a thermosetting resin and a small amount of a curing agent, the sum of the amounts of the soft black and thermosetting resin being 60 to 100 parts by weight per 100 parts by weight of the rubber.This high hardness rubber composition is advantageously used as a tire reinforcement for the rim cushion portion or for both the rim cushion portion and bead filler.

Abstract: A friction material having an excellent heat-resistance, comprises 5 to 70% by weight of pulp-like particles consisting essentially of a heat-resistant aromatic polymeric material; 1 to 70% by weight of a fibrous material comprising at least one member selected from inorganic fibrous materials and heat-resistant organic fibrous materials; 1 to 35% by weight of a friction-regulating agent and; 5 to 40% by weight of a thermosetting polymeric resin.