Abstract: An isomerization of a haloalkene is conducted in the presence of a mixture of a copper compound and a trithiocarbonic acid derivative or dithiocarbonic acid derivative.

Abstract: A process for the recovery of molybdenum and copper values from an ore comprising the same is provided which comprises employing an oxazine compound as a collection agent.

Abstract: A sealant composition based on a mercaptan-terminated liquid polymer, fillers, plasticizer, and curing agent wherein the liquid mercaptan-terminated polymer employed is prepared from a mercapto acid or mercapto acid ester and a polyoxypropylene glycol, the polyoxypropylene glycol having been end-capped with ethylene oxide prior to esterification to give primary alcohol terminal groups. The cured sealant based on the ethylene oxide-end capped polymer exhibits a non-tacky surface, whereas a cured sealant based on a propylene oxide end-capped glycol exhibits a tacky surface.

Abstract: At least one of an organo selenium and an organo tellurium curing agent is incorporated with a sealant comprising essentially a mercaptan-terminated polyether-polyester liquid polymer. In one embodiment there is provided a sealant composition comprising at least one of a selenium and tellurium N-substituted dithiocarbamate curing agent. Final compositions are obtained having improved thermal stability at temperatures of the order of 150.degree. C.

Abstract: A nickel-containing ultraviolet (U.V.) absorber and an uncured epoxy resin are both mixed with a sealant base to provide a sealant with greater adhesion strength to glass and aluminum after water weathering than when either the epoxy resin or U.V. absorber is alone mixed with the sealant base.

Abstract: A selected polymethyldihydroxysiloxane, a polymethylhydrosiloxane, a tetraalkyl titanate, and a low molecular weight, silicate-derived polymer are compounded to produce a release coating having significantly improved properties. A method for compositing an adhesive-coated material and a protective covering therefor, the covering having thereon a coating of the release composition of the invention as set forth.

Abstract: A mixture of polyamines obtained as a heavy residue from the distillation of a reaction product from the hydrogenation of branched aliphatic dinitriles is useful as curing agent for epoxy resins showing lowered water absorption and significantly higher lap shear strength.

Abstract: A hydrogenated thermoplastic elastomer and a low molecular weight polyalkene plasticizer in a sealant formulation containing a modifying resin and a filler provides a sealant composition having a good balance of properties.

Abstract: The sealant composition comprising radial teleblock copolymers or hydrogenated linear or radial teleblock copolymers, an epoxy resin and a modifying resin exhibit good canvas peel strength.

Abstract: Poly(oxyalkylene)-polyester-poly(sulfide)-polythiol is prepared by ester interchange between an alkyl mercaptocarboxylate/dialkyl thiodicarboxylate mixture and a poly(oxyalkylene)-polyol. The resulting polymer is a liquid material having more than two, preferably at least three pendant thiol groups. This polymer exhibits exceptional stability and is well suited for sealant applications.

Abstract: Mercaptoalkanoic acids and thiodialkanoic acids are reacted with a poly(oxyalkylene)-polyol to form poly(oxyalkylene)-polyester-poly(monosulfide)-polythiols which are useful as encapsulating materials and mold compositions when oxidatively coupled or cured. In one embodiment, a polymeric reaction product, either in the uncured state or partially cured state, is used for the preparation of flexible molds from which regularly or irregularly shaped objects can be made.

Abstract: A sealant made up of (1) a block copolymer from at least one monovinyl-substituted aromatic compound and at least one conjugated diene, said block copolymer being a thermoplastic elastomer; (2) a poly(vinyl aromatic)-compatible component; and (3) a polydiene-compatible component; and (4) a filler.

Abstract: A mixture of an unsaturated block copolymer and a hydrogenated thermoplastic elastomer in combination with a modifying resin and a filler provides a sealant formulation having good flexibility, low tack, and low melt viscosity without a sacrifice in other properties.

Abstract: Pretreating a first solid surface consisting of a material selected from the group consisting of unfilled poly(arylene sulfide) and fiberglass-filled poly(arylene sulfide) by mechanically roughening this first surface or, in the alternative, pretreating with flame a first solid surface of unfilled poly(arylene sulfide) greatly increases the lap shear strength of an adhesive bond of such a first poly(arylene sulfide) surface to a second solid surface as compared to the same bond without pretreatment of the poly(arylene sulfide) surface.

Abstract: Naphthalene and alkylated naphthalenes are useful as sulfur-solubilizers in coating and sealant formulations based on polymercaptan-terminated polymers. In one embodiment, sealant and coating formulations are prepared by curing a mixture of (a) a polymercaptan-terminated polymer, (b) naphthalene or alkylated naphthalenes as sulfur-solubilizers containing dissolved sulfur, and (c) a curing agent.

Abstract: Compositions comprising polymercaptan-terminated polymers such as poly(oxyalkylene)-polyester-poly(monosulfide)-polythiols having an average of more than two mercapto groups per molecule, sulfur as the curing agent, and an alkaline earth metal oxide curing agent accelerator are curable to sealant or coating compositions at ambient temperatures. The poly(oxyalkylene)-polyester-poly(monosulfide)-polythiols comprise the reaction product of (a) a mercapto-alkanoic acid, (b) a thiodialkanoic acid, and (c) a poly(oxyalkylene)polyol.

Abstract: Pretreating a first solid surface consisting of a material selected from the group consisting of unfilled poly(arylene sulfide) and fiberglass-filled poly(arylene sulfide) by mechanically roughening this first surface or pretreating with flame a first solid surface of unfilled poly(arylene sulfide) greatly increases the lap shear strength of an adhesive bond of such a first poly(arylene sulfide) surface to a second solid surface as compared to the same bond without pretreatment of the poly(arylene sulfide) surface.

Abstract: An adhesive composition is disclosed consisting essentially of a rubbery radial teleblock copolymer of a conjugated diene monomer and a vinyl-substituted aromatic monomer, a tackifier and a tackifier modifier, the latter being a polyalkene having a weight average molecular weight of about 200 to about 3000, said alkene having 2 to about 8 carbon atoms.

Abstract: Mixtures of mercaptoalkylnitriles and the corresponding thiodialkylnitriles are stabilized by incorporating therein a stabilizing amount of an organic phosphite of the formula ##SPC1##Wherein R' is hydrogen or alkyl having from 1 to 20 carbon atoms and m is an integer having a value of 1 or 2. The above mixture is hydrolyzed to the corresponding carboxylic acids for use in preparing poly(oxyalkylene)-polyester-poly(monosulfide)-polythiol polymers.

Abstract: A porous web-like substrate is treated with an adhesive containing a filler which increases the viscosity of the adhesive thereby inhibiting flow of the adhesive through the pores of the substrate, and increases the amount of the adhesive retained on the surface of the substrate. In a preferred embodiment a high surface area siliceous material is added to a carboxylated styrenebutadiene latex adhesive to improve adhesion of porous substrates.