Abstract: There is provided an infrared radiation curable organopolysiloxane composition having a poly(alkenylorganosiloxane), a siloxane hydride, an infrared radiation absorbent material, such as carbon black, and an effective amount of a platinum group metal catalyst. The infrared radiation curable organopolysiloxane composition can be used as a binder for a desiccant, such as a zeolite, useful in making multi-panel thermal pane windows.

Abstract: There are provided melt extruded blends of polyphenylene ether and diene based rubber containing an effective amount of a dialkylamine which has been found effective as a stabilizer for the diene based rubber. Additional diene based rubber stability can be achieved by using preextruded polyphenylene ether. The resulting melt extruded blends have been found to enjoy increased resistance to change in impact values when recycled in the molded state.

Abstract: A process for making metallized vias in diamond substrates is disclosed. The process involves laser-drilling a plurality of holes in a CVD diamond substrate and depositing tungsten, or a similar refractory metal, in the holes by low pressure CVD to provide substantially void-free metallized vias. Diamond substrates having metallized vias are also disclosed. The structures are useful for making multichip modules for high clock rate computers.

Abstract: Room temperature vulcanizable platinum group metal catalyzed silicone compositions are provided which utilize an N-heterocyclic adhesion promoter, such as 2,6 bis(trimethoxysilyltrimethyleneoxy)pyridine. Cohesive bonding is effected on various substrates.

Abstract: Graft copolymers are prepared by the reaction of an olefin polymer such as polyethylene or polypropylene with an ethylenically unsaturated t-alkylcarbamate compound. Said graft copolymers are capable of reaction with functionalized polyphenylene ethers to produce compatibilized polyphenylene ether-olefin polymer compositions.

Abstract: Addition-curable platinum group metal catalyzed silicone compositions are provided which utilize an N-heterocyclic adhesion promoter, such as bis(trimethoxysilyltrimethylene) 2,6 pyridine dicarboxylate. Cohesive bonding is effected on both plastic and metal substrates at temperatures of less than 100.degree. C. and in less than 1 hour.

Abstract: Divalent titanium is prepared by the reduction of higher valence titanium halides in a molten salt electrolyte for subsequent titanium deposition with aluminum to form alloys exhibiting excellent mechanical properties for use at high temperatures. At least one aluminum halide such as AlCl.sub.3 is combined with aluminum metal, at least one titanium halide such as TiCl.sub.3 where the titanium has a valence greater than two, and at least one salt capable of forming a melt with said aluminum halide at temperatures up to about 250.degree. C. to form a molten salt electrolyte. The salt may be an alkali, alkaline earth or organic halide. Upon heating in an inert atmosphere at a temperature greater than the melting point of the electrolyte, the higher valence titanium is reduced by aluminum metal to form divalent titanium. Titanium-aluminum alloys of up to 50 atomic percent titanium can then be deposited from the electrolyte.

Abstract: The thickness of a layer of material deposited by chemical vapor deposition, especially a diamond layer, is monitored by providing at least one substrate on which the material is deposited, with at least one perforation of a predetermined size therein. The relationship between the thickness of the layer formed in said perforation and the thickness of the layer formed on the substrate surface is determined, so that the thickness of the surface layer can be determined from the thickness of the layer formed in the perforation.

Abstract: Polyurethane foam of low thermal conductivity is prepared by employing carbon dioxide as a blowing agent, preferably in combination with a halogenated compound, typically a halocarbon or halohydrocarbon such as monofluorotrichloromethane or 1,1-dichloro-1-fluoroethane, and incorporating in the foam a carbon dioxide-reactive reagent. Sodium hydroxide and soda lime are illustrative carbon dioxide-reactive reagents. The carbon dioxide is preferably formed in situ by the reaction of water with the diisocyanate precursor of the polyurethane, and the carbon dioxide-reactivereagent is preferably introduced in admixture with a portion of the polyol precursor.

Abstract: An improved two membered substantially crack-free water jet mixing tube of an abrasive water jet cutting device and a method of its preparation. The method comprises chemically vapor depositing diamond layer on a funnel shaped support member to form an inner member of the mixing tube, separating the inner member from the support member, depositing and then cooling an outer member on the outer side of the inner member to produce a compressive stress on the inner member that substantially prevents formation cracks on the inner member. The inner side of the inner member has a smooth bore having a microcrystalline structure and the outer member has a higher coefficient of thermal expansion than diamond. The invention is also directed to a water jet cutting device that incorporates the aforementioned improved substantially crack-free water jet mixing tube.

Abstract: Addition-curable platinum group metal catalyzed silicone compositions are provided which utilize an N-heterocyclic adhesion promoter, such as bis(trimethoxysilyltrimethylene) 2,6 pyridine dicarboxylate. Cohesive bonding is effected on both plastic and metal substrates at temperatures of less than 100.degree. C. and in less than 1 hour.

Abstract: Macrocyclic polyimide oligomers are prepared by the reaction of at least one diamine with at least one tetracarboxylic acid or dianhydride thereof in equimolar amounts, under conditions of high dilution of said reagents. The macrocyclic oligomers are capable of conversion into linear polyimides by heating with a primary amine in the presence of a macrocyclic polyimide polymerization catalyst, typically an alkaline earth or transition metal or salt thereof.

Abstract: Macrocyclic polyetherimide oligomer compositions are prepared by a displacement reaction at a temperature in the range of about 200.degree.-225.degree. C. between at least one fluorinated aromatic phthalimide and at least one phenolic trialkylsilyl ether compound. Preferably, a bis-fluoroimide and a bis-trialkylsilyl ether of a dihydroxyaromatic compound such as resorcinol are employed. The reaction is conducted by maintaining reagents A and B in high dilution in a dipolar aprotic organic liquid such as N-methylpyrrolidone, and in the presence of a catalytic amount of at least one substantially soluble fluoride. Preferably, a mixture of reagents A and B is added to solvent containing the catalyst.

Abstract: A novel process is disclosed for producing stilbazolium salts. Said novel process employs a heterocyclic amine catalyst, such as pyrrolidine, an alkylated pyridine salt and a substituted benzaldehyde which unexpectedly results in increased reaction rates and product yields.

Abstract: Blends of metallic, preferably ferromagnetic, particles, macrocyclic oligomer compositions, especially poly(alkylene dicarboxylate) oligomers, and catalysts/initiators for polymerization of said macrocyclic oligomers are molded into magnets having high metal loadings, typically about 60-85% by volume. Compression molding of such blends can be conducted at relatively low pressures.

Abstract: Macrocyclic polyimide oligomers are prepared by the reaction of at least one diamine with at least one tetracarboxylic acid or dianhydride thereof in equimolar amounts, under conditions of high dilution of said reagents. The macrocyclic oligomers are capable of conversion into linear polyimides by heating with a primary amine in the presence of a macrocyclic polyimide polymerization catalyst, typically an alkaline earth or transition metal or salt thereof.

Abstract: Stable aqueous artificial latices having a core-shell structure are prepared from two otherwise incompatible polymers in a blend also including a copolymer of said polymers. For example, an artificial latex in which the particles have a styrene-acrylonitrile core and an EPDM shell can be prepared.

Abstract: Film forming aromatic organic polymers are provided having a dielectric constant greater than 3 resulting from the polymerization of aromatic organic monomers having orientable organic dipolar groups with a net dipole moment of at least 0.5 Debye. Among the aromatic organic polymers are included polyimides and polyetherimides having repeat main chain groups with orientable organic dipolar groups with non-symmetrically positioned polar radicals, such as fluoro and nitrile.

Abstract: A method is provided for making a heat curable organopolysiloxane composition, such as a pressure sensitive adhesive composition by blending a benzene soluble resinous copolymer in the form of a spray dried particulate, comprising triorganosiloxy units, such as trimethylsiloxy units, and SiO.sub.2 units with a fluid network mixture of an alkenyl siloxane, a silicon hydride siloxane and a hydrosilylation catalyst.

Abstract: Graft polymers are prepared by the free radical reaction of a base polymer such as polyethylene or polypropylene with an olefinic compound containing a tertiary alkyl ester group, which may be a simple carboxylic acid or a carbamic acid ester group. Upon melt blending or the like with polymers containing other functional groups, such as carboxy- or epoxy-functionalized polyphenylene ethers, the t-butyl groups are removed by thermal degradation and there are obtained copolymers which are useful to compatibilize blends of the corresponding polymeric constituents.