摘要:
The invention is a compound which comprises an unsaturated cyclic imide moiety and an aryl cyclobutene moiety, wherein the cyclobutene moiety is fused to the aryl radical, and wherein the imide nitrogen is connected to the aryl radical by a direct bond or a bridging member. Another aspect of this invention is a polyimide polymeric composition which results from the polymerization of the above-described compounds.
摘要:
Monomeric compositions comprising a monomer containing one arylcyclobutane moiety, and a molecular group comprising at least one unsaturated alkyl group are provided.
摘要:
The use of saturated and unsaturated polyalkyl bicyclo-[2.2.2]-octanes and/or alcohols and aldehydes thereof to alter organoleptic properties, and particularly the aroma, of consumable materials, together with compositions containing such bicyclic materials; and novel bicyclo-[2.2.2]-octane derivatives and processes for preparing them.
摘要:
Novel compounds of phosphorus, of arsenic and of antimony can be used as ligands to form complexes of metals of transition group VIII which can be used in catalysts for hydroformylation, hydrocyanation, carbonylation, hydrogenations, oligomerization and polymerization of olefins and for metathesis.
摘要:
A chemical reactor and method of using the same. The reactor comprises first and second micro-engineered discrete flow passages for receiving chemical fluids. The first fluid passage receives a first chemical fluid in which a chemical change or reaction in the fluid can be initiated by subjecting the fluid to a stimulus. A stimulation means is located in, or adjacent to, the first flow passage, and is operable to stimulate a chemical change or reaction in the first fluid. The second micro-engineered discrete flow passage receives a second chemical fluid which will interact with the stimulated first fluid when contacted by the stimulated first fluid. The first and second flow passages converge at a first region to form an outlet passage within which the first and second fluids may contact each other.
摘要:
A process for improving the traction coefficient between at least two relatively rotatable elements having tractive surfaces in a torque transmitting relationship which comprises introducing between the tractive surfaces of the elements a traction drive fluid comprising, as the active component, a hydrocarbon compound having a bicylo octane skeleton.
摘要:
The invention is a poly(arylcyclobutene) comprising arylcyclobutene moieties connected by a bridging member, wherein the bridging member is (a) a direct bond, (b) a polyvalent inorganic radical or (c) a polyvalent organic radical which contains (1) one or more heteroatoms comprising oxygen, sulfur, nitrogen or phosphorus or (2) one or more aromatic radicals, and wherein one or more cyclobutene rings are fused to one of the aryl rings.
摘要:
A process for the preparation of monomeric polyvinyl compounds and/or oligomers thereof comprising:(i) preactivating a supported rhenium oxide catalyst with a hydrocarbyl metal compound; and(ii) reacting, under metathesis reaction conditions, norbornene or one or more substituted norbornenes, or mixtures thereof, with ethylene in the presence of the activated supported catalyst of step (i).