Abstract:
This case relates to tough, wear resistant graded structure composites, to a process for preparing the same and to tools and products fabricated therefrom. The composites have a surface layer e.g. of WC and a binder, an interface layer, e.g. which is a stepwise transition from the surface layer whereby the binder content thereof gradually increases, a substrate layer which is a combination of e.g. an initial high carbon steel layer and finally a base layer of bainitic steel. The composites are substantially non-porous and can be used to fabricate components such as drill bits, wear plates, pump components machine tools, seals, washers, bearings and the like.
Abstract:
A process for the preparation of alcohols comprises reacting one or more olefins with carbon monoxide and optionally hydrogen in the presence of a C₁ to C₂₀ aliphatic alcohol solvent and a catalyst comprising a phosphine component of formula PR₃ where R is independently C₁ to C₁₀ primary alkyl and a rhodium component. The solvent is preferably a primary aliphatic alcohol most preferably having from one to four carbon atoms.
Abstract:
A process for the preparation of alcohols comprises reacting one or more olefins with carbon monoxide and optionally hydrogen in the presence of a C₁ to C₂₀ aliphatic alcohol solvent and a catalyst comprising a phosphine component of formula PR₃ where R is independently C₁ to C₁₀ primary alkyl and a rhodium component. The solvent is preferably a primary aliphatic alcohol most preferably having from one to four carbon atoms.
Abstract:
A nitrogen-containing polymer is prepared by reacting ammonia or an amine selected from C₁ to C₅₀ primary alkylamines, benzylamine and substituted benzylamines with a linear terpolymer comprised of alternating -CO- and -(A)- units, the -(A)- units comprising a mixture of -CH₂CH₂- units and -CH₂CH(R)- units wherein R is C₁ to C₆ alkyl or phenyl.