Abstract: The formation of structural composites having low smoke release and low heat release properties by forming a sandwich comprising a non-woven fiber mat between woven glass fiber mats and impregnating said sandwich with a mixture of a bisoxazoline and a polyphenolic compound to form a prepreg which can be formed and molded at elevated temperatures is described.

Abstract: Compositions useful as a material for fuel lines comprising an intimate blend of:(I) from 45 to 55% by weight of a polyamide and(II) from 55 to 45% by weight of a mixture of(a) From 70 to 90% by weight of high density polyethylene grafted with an alpha, beta-olefinically unsaturated dicarboxylic acid anhydride,(b) From 5 to 15% by weight of linear low density polyethylene grafted with an alpha, beta-olefinically unsaturated dicarboxylic acid anhydride, and(c) From 5 to 15% by weight of ethylene/propylene/diene rubber grafted with an alpha, beta-olefinically unsaturated dicarboxylic acid anhydrideare described.

Abstract: This invention relates to powdered flux compositions and their use in purifying molten mixtures of aluminum and silicon before casting. The powered flux compositions comprise a carbonate, a sodium and hydrogen free fluoride, and amorphous or encapsulated red phosphorus. The major advantage of the powered flux is that all necessary components needed to purify the molten mixtures of aluminum and silicon and refine the silicon particles are together in one package, and purification can be carried out in one step.

Abstract: Curable epoxy resin compositions are described which comprise a mixture of an acid curable epoxy resin and a minor amount of an oxidizing agent capable of reacting with sulfur dioxide to form a catalyst for curing said epoxy resin. The curable epoxy resin composition may contain solid particulate materials. The procedures for curing such epoxy resins as well as methods for forming sand cores and molds also are described. Sand cores and molds produced in accordance with the method of the invention have sufficient strength and hardness after a few seconds of curing for normal foundry applications.

Abstract: Compositions having melting points below 100.degree. C. which are useful in the formation of resins by reaction with polyphenolic compounds consisting of a mixture of more than two compounds having the formula ##STR1## wherein A represents a cyclic or acyclic aliphatic or substituted cyclic or acyclic aliphatic moiety having from 1 to 20 carbon atoms or an aromatic mono- or multi-nuclear or aliphatic substituted aryl residue having from 6 to 20 carbon atoms,R independently represents H, CH.sub.3, CH.sub.2 CH.sub.3 or C.sub.6 H.sub.5,R.sup.1 independently represents H or CH.sub.3,R.sup.2 independently represents H or CH.sub.3, andx represents an integer from 0 to 2as described.

Abstract: A process for preparing thioether amide diol comprising reacting a bicyclic amide acetal with hydrogen sulfide at a temperature in the range of from 20.degree. to 200.degree. C. wherein a mole ratio of bicyclic amide acetal to hydrogen sulfide is in the range of from about 1:1 to about 2:1 is described.

Abstract: A polyurethane adhesive composition which comprises a mixture of a polyisocyanate blocked with a phenolic blocking agent and a polyamine curing agent and optionally may contain a polyepoxide is described.

Abstract: Disclosed are modified spray guns, particularly electrostatic spray guns, for implementation of the vaporous amine catalyst spray method disclosed in U.S. Pat. No. 4,517,222. In particular, the present invention broadly is directed to a spray gun for spraying atomized liquid, e.g. vapor permeation curable paint, with the assistance of a vaporous amine flow via an amine flow path established in the spray gun wherein the improvement comprises a control apparatus actuable in the absence of the vaporous amine flow to cause a heated non-amine gas, preferably heated air, to flow through and purge the amine flow path within the gun for maintaining a desired flow path temperature adequate for suppressing amine condensation in the flow path. The spray gun can be a hand spray gun or an automated spray gun utilizing air atomization or mechanical atomization, operating under electrostatic spray conditions if desired.

Abstract: Disclosed is a method for improving the flexibility of a phenol or mercapto resin wherein an aliphatic hydroxyl-functional polyol or polyepoxide component is partially capped with a phenol or mercapto capping agent followed by chain extension with a polyisocyanate under reaction conditions wherein said polyisocyanate substantially selectively reacts with aliphatic hydroxyl groups or epoxy groups residual from the prior step of the process. The ratio of components is such that a resin predominating in one or more of the following general structures is produced: ##STR1## where, R and R' each is a phenol functional group or a mercapto functional group,A and B each is an organic chain residue of said component containing functionality epoxy,Poly and Poly' each is an organic chain residue of said component containing aliphatic hydroxy functionality,X is an aliphatic hydroxyl group,the wavy line represents an organic chain residue of said polyisocyanate,n is 1-4,m and p each is 0-2, andq and s each is 1-15.

Abstract: A process for preparing hydroxy phosphonic acid ester polyols by reacting an alkenyl phosphonic acid with an alkylene oxide and the reaction of the resulting hydroxy phosphonic acid ester polyols with polyisocyanates to form polyurethanes is described.

Abstract: A process for preparing novel poly(arylene ether-amide) polyols and their use in the formation of polyurethanes wherein the poly(arylene ether-amide) polyols are formed by reaction of a bicyclic amide acetal with a polyphenolic compound are described.

Abstract: A hydrocarbon cracking catalyst comprises rare earth exchanged "Y" zeolite which has been ion exchanged to enhance the yttrium content. The catalyst is employed in fluid catalytic cracking to maximize gasoline.

Abstract: An apparatus for separating solids and vapors from a suspension of the two materials is disclosed. The solids are directed through a conoid element to enhance directional flow and to prevent return of solids to the separation apparatus.

Abstract: This invention relates to heat curable foundry mixes and binder compositions particularly suitable for making foundry shapes by a hot box process. The binders used are aqueous basic solutions of phenolic resole resins. Salts are added to the binders or the sand to improve the tensile strength of foundry shapes made with the foundry mixes. Silicone compounds are added to the aggregate to improve the water resistance of foundry shapes made with the foundry mixes containing the binder and salt. The foundry shapes are used to prepare metal castings.

Abstract: The process for preparing novel compounds having the formula ##STR1## by the reaction of a bicyclic amide acetal of formula ##STR2## and an olefinically unsaturated carboxylic acid of formula ##STR3## wherein R, R', R" and R"' independently represent hydrogen, an alkyl group or an alkyl ether group having from 1 to 20 carbon atoms, an aryl group or an aryl ether group having from 6 to 12 carbon atoms is described.

Abstract: Disclosed is an activatable catalyst which is effective for the reaction of a hydroxyl compound and an isocyanate. Preferably, the catalyst is utilized in the cure of a coating composition of a polyol and a polyisocyanate. The activatable catalyst is activated in the presence of an amine activator or heat and comprises the reaction product of a metal catalyst selected from a tin catalyst, a bismuth catalyst, and mixtures thereof; and a molar excess of a complexing agent. The complexing agent is selected from a mercapto compound, a polyphenol characterized by being reactable with an isocyanate group in the presence of a tertiary amine activator, and mixtures thereof. A single polyol resin may bear both the complexing functionality and the activatable catalyst. Advantageusly, the polyol and polyisocyanate both are aliphatic.

Abstract: A method and arrangement of apparatus employed is described for regenerating solid particles comprising carbonaceous deposits. At least three sequential stages of separation of flue gases from entrained solids are provided in association with an upflow catalyst regeneration operation.

Abstract: An improved expendable pattern casting process and an improved refractory composition for coating expendable patterns used in the process containing substantially spherical refractory material.

Abstract: Disclosed is a storage stable blend of a long chain polyol and a short chain diol wherein the diol is present in an amount whereby the diol and polyol form an incompatible blend. The blend is rendered storage stable by the addition of a compatibilizing amount of a phenol.

Abstract: Plugging of fuel injectors for internal combustion engines is reduced by depressurizing the fuel pressure line which feeds the injectors, promptly after shutoff of ignition. Reduction of deposite assists in maintaining drivability and fuel economy.