Abstract: Addition of particular low molecular weight polyisobutylene to natural rubber compounds reduces hysteresis, increases blow-out time and lowers compression set.

Abstract: Polyoxyalkylene polyether polyols are stabilized against oxidative degradation by incorporating therein a synergistic stabilizing composition containing (1) a mixture of butylated phenols consisting of 2-tertiary butyl phenol, 3,5-ditertiary butyl-4-hydroxyhydrocinnamate and 1,6-hexamethylene bis(3,5-ditertiary-butyl-4-hydroxyhydrocinnamate) or tetrakis [methylene(3,5-ditertiary butyl-4-hydroxyhydrocinnamate)] methane (2) a p,p'-dialkyldiphenylamine such as p,p'-dioctyldiphenylamine and (3) a phenothiazine compound. Polyurethane foams are stabilized against scorching when the stabilized polyols are utilized in the foam preparation or the stabilizing composition is added with other reactants.

Abstract: A triazolidine-3,5-dione/formaldehyde/amine condensate is disclosed of the formula ##STR1## in which wherein the terms R.sup.1, R.sup.2 and R.sup.5 are defined hereinafter in the specificationa process for the preparation of such condensate by reaction of a triazolidine-3,5-dione with formaldehyde and a suitable nitrogen compound and the use of the condensate as a flame-proofing agent for thermoplastics, especially polyamide and as an auxiliary for modifying polymeric substances.

Abstract: In a sulfur-curable conjugated diene rubber compound formulation containing a silica reinforcing filler and a mercaptoalkyltrialkoxysilane coupling agent, the improvement which comprises increasing time-to-scorch by employing benzothiazyl sulfenamide accelerators at levels of above at least 1.5 phr.

Abstract: The use of open-chain acetals or ketals corresponding to the following general formula ##STR1## as non-discoloring anti-ozonants for natural and/or synthetic rubber.

Abstract: Self-extinguishing polyolefin compositions consisting of:(1) from 52 to 96.55% by weight of at least one olefin polymer or copolymer;(2) from 3 to 30% by weight of a nitrogenous compound selected from amongst 1,3,5-triazines, urea and dicyandiamide;(3) from 0.3 to 3% by weight of a free-radical promoting compound selected from amongst 2,3-dimethyl-2,3-diphenylbutane and 2,3-dimethyl-2,3-diphenyl-hexane;(4) from 0.15 to 15% by weight of a compound of formula(R.sub.1 --S).sub.n R.sub.3 or (II) R.sub.2 .dbd.S, (I)wherein R.sub.1 and R.sub.2 are imidazol, uracyl, alkyleneurea or benzotriazol radicals, R.sub.3 =H, or a metal of Group II (A) or (B), or aluminum.

Abstract: Additives for rubber compositions, giving vulcanisates having improved retention of optimum physical properties, are compounds containing two or more groups of the formula --S--SO.sub.2 R linked by an organic bridging group, or polymers containing two or more groups of the formula --S--SO.sub.2 R attached to an organic polymer chain, where R represents (a) a radical OM where M is a monovalent metal, the equivalent of a multivalent metal, a monovalent ion derived by the addition of a proton to a nitrogenous base, or the equivalent of a multivalent ion derived by the addition of two or more protons to a nitrogenous base, or (b) an organic radical selected from aliphatic, cycloaliphatic, aromatic and heterocyclic radicals, and radicals which are combinations of any two or more such radicals.

Abstract: Compounds of the formula I ##STR1## wherein R.sub.1 is hydrogen, C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.12 cycloalkyl, phenyl or C.sub.7 -C.sub.9 phenylalkyl and R.sub.2 is hydrogen or C.sub.1 -C.sub.18 alkyl, or, if R.sub.1 is hydrogen, R.sub.2 is a divalent 1,1,3,3-tetramethylpropylene radical fused in the 2-position and 3-position or the 9-position and 10-position, and X is sulfur or a group --CH(R).sub.3 --, in which R.sub.3 is hydrogen or a radical of the formula II --CH(R.sub.4)--CH(R.sub.5)SR.sub.6, and each of R.sub.4 and R.sub.5 independently is hydrogen or C.sub.1 -C.sub.6 alkyl and R.sub.6 is C.sub.1 -C.sub.20 alkyl, while the alkyl group can be interrupted by one or more sulfur atoms, and A is a primary or secondary aliphatic or alicyclic, aromatic or araliphatic amine which contains substituents of the same type or mixed substituents, or a heterocyclic amine or a hydrazine derivative. These compounds are useful stabilizers for organic material.

Abstract: Oxalic acid, alone or in combination with phenothiazine or with phenothiazine and 4-chloro-2-nitrophenol, increases the storage life of vinyl ester resins or unsaturated polyesters without adversely suppressing the exotherm or affecting their curability.

Abstract: Nylon polymer compositions are rendered flame retardant by incorporating therein an effective flame retardant amount of a salt of 2,5-dimercapto-1,3,4-thiadiazole and a metal from the group consisting of Zn, Mn, Ba, Ni, Co, Fe, Cu, Mo, and Cr.

Abstract: A method for the uniform blending of additives into thermoplastic synthetic resins. A solution or finely divided dispersion of the additive is produced in a polymerizable cyclic ester of the general formula: ##STR1## wherein R represents respectively hydrogen or an alkyl group of 1-18 carbon atoms,A represents a --O-- or --COO-- group,x and y represent integers from 1 to 15, andz represents 0 or 1.This solution or dispersion, optionally after polymerization of the cyclic ester, is admixed to the thermoplastic synthetic resin at the end of its manufacturing process or in a subsequent processing stage.

Abstract: Smoke suppressed rigid polyurethane foams are prepared from a reaction mixture comprising as the smoke suppressant additive a metal salt of a: dialkyl dithiocarbamate, a mercaptobenzothiazole, a 2,5-dimercapto-1,3,4-thiadiazole, a mercaptotriazine, a hydroxy thiophenol or an aliphatic dimercapto compound of 2 to 10 carbons.

Abstract: Trityl compounds wherein a triphenylmethyl group is attached to oxygen, divalent sulfur, trivalent nitrogen or a halogen are effective synergists for organic bromine flame retardants in polypropylene compositions.

Abstract: 1-Hydroxy-4-heteroarylaminoanthraquinones of the formula ##STR1## wherein Q is for example one of the two groups of the formulae ##STR2## are most suitable for the mass coloration of polyester. They are distinguished in particular by good lightfastness and purity of shade. Further definitions of Q will be found in claim 1.

Abstract: Isoindoline colorants of the formula ##STR1## where R.sup.1 is the radical of a 5-membered or 6-membered heterocyclic unsaturated ring, which may or may not be fused to a benzo ring, X is ##STR2## R.sup.2 and R.sup.3 independently of one another are hydrogen, C.sub.1 -C.sub.4 -alkyl, benzyl, phenyl or 1-naphthyl, and R.sup.1, the phenyl and naphthyl radicals, and the ring A may or may not be substituted by groups which do not confer solubility.In surface coatings, printing inks and plastics the novel colorants give yellow to red or brown very deep colorations which have good lightfastness, and fastness to weathering and to overspraying.

Abstract: A light insensitive imageable layer comprising a synthetic polymeric binder, a dye, a nitrate salt, and an acid.

Abstract: This invention relates to water-activatable hot-melt adhesives. More specifically, it relates to such adhesives having non-blocking qualities at high humidity at higher pressures than have been used heretofor.

Abstract: Ethylene or propylene polymers are dyed by dispersing a small quantity of a copolymer of a C-14 or higher alpha-olefin and maleic anhydride therein and subsequently treating the composition with an aqueous solution of a basic dye stuff such as Malachite Green.