摘要:
The present invention relates to epoxy group-terminated polymers of the formula (I). Said epoxy group-terminated polymers are suited extremely well as impact resistance modifiers, particularly in epoxy resin compostions. They are particularly suited for use in heat-curing epoxy resin adhesives. It has been found that such epoxy resin compostions not only have excellent mechanical properties and high glass transition temperatures, but also above all improved impact resistance properties, both at room temperature and at low temperatures.
摘要:
Derivatized solid epoxy resins of the formula (I), which are outstandingly suitable as impact modifiers; and compositions which include such derivatized solid epoxy resins and are outstandingly suitable as one-component heat-curable adhesives, and as structural foams which have a high impact resistance and high mechanical stability.
摘要:
The invention relates to differently blocked polyurethane polymers of formula, to their use as impact resistance modifiers, to heat-curable epoxy resin compositions containing said impact resistance modifiers and to methods for the production of said compositions. The invention also relates to bonding methods using said compositions and to articles produced by said methods.
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 compounds of the formula (I) wherein R1 is hydrogen, C1-C8alkyl, —O, —OH, —CH2CN, C1-C13alkoxy, C2-C16alkoxy substituted by —OH; C5-C12cycloalkoxy, C3-C6 alkenyl, C7-C9 phenylalkyl unsubstituted or substituted on the phenyl by 1, 2 or 3 C1-C4 alkyl; or C1-C8 acyl; R2 is hydrogen or methyl; R3 and R4 are hydrogen or methyl; X is C2-C20,alkylene or a group of the formula (II-a-1) (II-a-2) (II-a-3) (II-b-1) (II-b-2) or (II-b-3) and Y is C5-C12cycloalkyl, C5-C12cycloalkyl substituted by 1, 2 or 3 C1-C4 alkyl; or a group of the formula (III) wherein R1 R2, R3 and R4 are as defined above, are suitable as B-nucleating, light stabilizing agents for polypropylene resins.
摘要:
The present invention relates to 1-alkoxy-polyalkyipiperidine 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 Xe 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:
A system for supporting the torque of an internal-combustion engine has a support arranged transversely in the vehicle. This support has a strut as well as a support arm. These two support parts are connected with one another by way of an elastic bearing, the strut being fastened on a camshaft housing and the support arm being fastened on the side member of the vehicle. The elastic bearing is connected with the vehicle body structure, for example, on a spring strut dome, by way of a console.
摘要:
Pyrroles of the formula (I) are prepared by dehydrogenating pyrrolidines of the formula (II) where R1 and R2, independently of one another, are hydrogen or an aliphatic radical of 1 to 6 carbon atoms, or pyridines of the formula (III) are prepared by dehydrogenating piperidines of the formula (IV) where R3, R4 and R5, independently of one another, are hydrogen or an aliphatic radical of 1 to 6 carbon atoms, in the presence of a supported noble metal catalyst, by a process in which the dehydrogenation is carried out in the presence of from 1 to 50% by weight, based on the pyrrolidine or piperidine and water, of water.
摘要:
Polyarylene ethers which, based on the total amount of the structural units present in the polyether resin, contain 2-100 mol % of a recurring structural unit of formula I ##STR1## and 0-98 mol % of a recurring structural unit of formula II wherein each a is 1 or 2, 10 to 100% of X, based on the total number of the bonds X present in the structural units of formulae I and II, are --SO.sub.2 --, and 0 to 90% of X are --CO--, and A is a group of formula IIIa-IIIg: ##STR2## wherein Y is --CH.sub.2 --, --C(CH.sub.3).sub.2 --, --C(CF.sub.3).sub.2 --, --S--, --SO--, --SO.sub.2 --, --O-- or --CO--, and the aromatic rings in the structural units of formulae I and II are unsubstituted or substituted by one or more alkyl groups of 1 to 4 carbon atoms, have good solubility in organic solvents and are suitable preferably for modifying other plastics materials or for use as matrix resins for the production of fibrous composite structures.
摘要:
The invention relates to soluble homo- or copolyimides of formula I ##STR1## wherein Y is hydrogen or the substituents Y, together with the linking N atom, are a divalent radical of of formulae IIa to IIc ##STR2## and X is the radical of of an aromatic amine after removal of the amino end groups, and n is an integer from 5 to 150.The compounds of the invention are readily soluble in organic solvents and are suitable tougheners for epoxy, bismaleimide and triazine resin systems.