摘要:
Discussed are heat-curable epoxy resin compositions containing at least one epoxy resin A with, on average, more than one epoxide group per molecule, at least one curing agent B for epoxy resins, which is activated by an increased temperature, at least one terminally blocked polyurethane prepolymer of formula (I) and at least one epoxide-terminated polyurethane prepolymer of formula (II). The epoxy resin compositions are particularly suitable for use as one-component, heat-curable adhesives and are characterized by excellent mechanical properties, high glass transition temperatures and high impact resistance.
摘要:
The instant invention relates to novel alkoxyamine initiators/regulators containing an ethylenically unsaturated, radically polymerizable group. The compounds are useful for the preparation of complex polymeric architectures. Further aspects of the invention are a polymerizable composition and a polymerization process comprising the alkoxyamine initiators/regulators, a macroinitiator obtainable by said polymerization process and a process for polymerizing with the macroinitiator.
摘要:
The present invention relates to 1-alkoxy-polyalkyl-peridine derivatives containing a structural element of formula (I) G1, G2, G3, G4 are independently C1-C6alkyl with the proviso that at least one is not methyl or G1 and G2 or G3 and G4, or G1 and G2 and G3 and G4 together form a C5-C12cycloalkyl group; G5, G6 independently are H, C1-C18alkyl, phenyl, naphthyl or a group COOC1-C18alkyl and X represents a group such that the free radical X• derived from X is capable of initiating polymerization of ethylenically unsaturated monomers, with the proviso that compounds A1 and A2 are excluded Further subjects of the invention are a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b) a 1-alkoxy-polyalkyl-piperidine derivative, a process for polymerizing ethylenically unsaturated monomers, and the use of 1-alkoxy-polyalkyl-piperidine derivatives for controlled polymerization. The intermediate N-oxyl derivatives, a composition of the N-oxyl derivatives with ethylenically unsaturated monomers and a free radical initiator X•, as well as a process for polymerization are also subjects of the present invention.
摘要:
Disclosed are compositions containing at least one epoxy resin A with on average more than one epoxy group per molecule; at least one epoxy adduct B with on average one epoxy group per molecule; at least one thixotropic agent C, based on a urea derivative in a non-diffusing support material; and at least one curing agent D for epoxy resins, which is activated by an increased temperature. Also disclosed are compositions containing at least one core-shell polymer E and/or filler F and/or reactive diluent G.
摘要:
The present invention provides a process for preparing propargyl alcohol by converting an aqueous formaldehyde solution comprising acetylene over a catalyst comprising copper acetylide at an operating pressure of from 1 to 15 bar and from 70 to 120° C. without forming a continuous gas phase, in which the aqueous formaldehyde solution comprises an organic solvent for acetylene and the catalyst is arranged in a fluidized bed.
摘要:
The instant invention relates to a composition of a thermoplastic polymer and a triblock-copolymer or grafted comb copolymer, with enhanced melt flow during processing. Further aspects of the invention are the triblock-copolymers or grafted comb polymers itself, a method for their production and their use as compatibilizers and meltflow enhancing additives. Yet another aspect of the invention are functional alkoxyamines, which are useful for the preparation of the triblock-copolymers or grafted comb polymers.
摘要:
The instant invention relates to a composition of a thermoplastic polymer and a triblock-copolymer or grafted comb copolymer, with enhanced melt flow during processing. Further aspects of the invention are the triblock-copolymers or grafted comb polymers itself, a method for their production and their use as compatibilizers and meltflow enhancing additives. Yet another aspect of the invention are functional alkoxyamines, which are useful for the preparation of the triblock-copolymers or grafted comb polymers.
摘要:
The present invention relates to selected 1-alkoxy-2,2 diethyl-6,6 dimethyl piperidine and 1-alkoxy-2,6 diethyl-2,3,6 trimethyl piperidine derivatives which are substituted in the 4 position by an oxygen or nitrogen atom; a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b) said piperidine derivatives. Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers, and the use of 1-alkoxy-2,2 diethyl-6,6 dimethyl piperidine and 1-alkoxy-2,6 diethyl-2,6 dimethyl piperidine derivatives which are substituted in the 4 position by an oxygen or nitrogen atom for controlled polymerization. The intermediate N-oxyl derivatives, a composition of the N-oxyl derivatives with ethylenically unsaturated monomers and a free radical initiator, as well as a process for polymerization are also subjects of the present invention.
摘要:
The preparation of amines of the formula (I): R1R2CH—N R3R4 (I) in which R1, R2, R3 and R4, independently of one another, are hydrogen, straight-chain or branched C1-C12-alkyl, C3-C12-cycloalkyl, C6-C10-aryl or C7-C11-aralkyl, takes place by catalytic, reductive amination of mixtures comprising carbonyl compounds of the formula (II) and/or alcohols of the formula (III) R1—C(═O)—R2 (II) R1—CH(OH)—R2 (III) which also comprise at least 50 ppm, based on the mixtures, of halogen, with nitrogen compounds of the formula (IV): H N R3 R4 (IV) with the abovementioned meanings for R1 to R4, in the presence of Co- and/or Ni-containing catalysts, which comprises carrying out the reductive amination additionally in the presence of solid acidic cocatalysts.