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:
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 polyarylene ethers which contain, based on the total amount of structural elements present in the polyether resin, 5-100 mol % of a recurring structural element of the formula I ##STR1## and 0-95 mol % of a recurring structural element of the formula II ##STR2## in which X and X' independently of one another are --SO--, --SO.sub.2 -- or --CO--, one of the radicals R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is phenyl or phenyl which is substituted by one to three (C.sub.1 -C.sub.4)alkyl groups and the remaining radicals R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently of one another are hydrogen, (C.sub.1 -C.sub.4)alkyl, phenyl or phenyl which is substituted by one to three (C.sub.1 -C.sub.4)alkyl groups, and A is an aromatic radical, at least 25% of the bonds X and/or Y and/or the bridge members contained in A being --SO.sub.2 --.These industrial materials are distinguished by very good mechanical properties and good solubility.
摘要:
Polyarylene ether sulfones which have a reduced viscosity of 0.1 to 2.0 dl/g, measured at 25.degree. C. in a 1% solution in N-methylpyrrolidone (NMP), and which contain, based on the total number of structural units present in the polyarylene ether sulfone resin, 99-1 mol % of a recurring structural unit of formula I ##STR1## and 1-99 mol % of a recurring structural unit of formula II--O--Ar.sub.2 --O--Ar.sub.1 -- (II)wherein the aromatic rings in the structural unit of formula I are unsubstituted or substituted by one or more C.sub.1 -C.sub.4 alkyl groups, C.sub.1 -C.sub.4 alkoxy groups or halogen atoms, Ar.sub.1 is a radical of formula IIIa-IIIc ##STR2## wherein a is 0 or 1, ##STR3## which radical is unsubstituted or substituted by one or more C.sub.1 -C.sub.4 alkyl groups, C.sub.1 -C.sub.4 alkoxy groups or halogen atoms, and Ar.sub.2 is a radical of formula IVa-IVe ##STR4## wherein b is 0 or 1 ##STR5## wherein c is 0 or 1 ##STR6## wherein Z is --CO--, --SO.sub.2 --, --SO--, --S--, --O--, ##STR7## wherein R is methyl or phenyl, which radical is unsubstituted or substituted by one or more C.sub.1 -C.sub.4 alkyl groups, C.sub.1 -C.sub.4 alkoxy groups or halogen atoms, are soluble in customary organic solvents and can be processed from the solution to films or incorporated in other matrix resins.
摘要:
The present invention concerns low-odor, low-viscosity hardeners for epoxy resins, including an amine with at least one amino group of formula (I) and an amine with at least one amino group of formula (II), wherein the amino groups of formulas (I) and (II) are present in a particular ratio. These hardeners harden quickly with epoxy resins and without blushing to form films of high hardness and good resistance. They are especially suitable for low-emission coatings.
摘要:
The present invention concerns a low-odor, low-viscosity hardener for epoxy resins comprising the amine of formula (I), as well as a method for thinning of hardeners for epoxy resins by adding the amine of formula (I). These hardeners harden with epoxy resins quickly and without blushing to form films of high hardness and little brittleness, even without non-incorporable thinners such as benzyl alcohol. They are especially suitable for low-emission coatings.
摘要:
Silanes of formula (I), or of substrates whose surface is coated or derivatized with a silane of formula (I), as a curing agent for epoxy resins which is activatable at elevated temperature. Such thermosetting epoxy resin compositions allow a large reduction in the curing temperature without great impairment of their storage stability.
摘要:
The present invention concerns low-odor, low-viscosity hardeners for epoxy resins, including an amine with at least one amino group of formula (I) and an amine with at least one amino group of formula (II), wherein the amino groups of formulas (I) and (II) are present in a particular ratio. These hardeners harden quickly with epoxy resins and without blushing to form films of high hardness and good resistance. They are especially suitable for low-emission coatings.
摘要:
The present invention concerns a low-odor, low-viscosity hardener for epoxy resins comprising the amine of formula (I), as well as a method for thinning of hardeners for epoxy resins by adding the amine of formula (I). These hardeners harden with epoxy resins quickly and without blushing to form films of high hardness and little brittleness, even without non-incorporable thinners such as benzyl alcohol. They are especially suitable for low-emission coatings.
摘要:
The invention relates to a vacuum cleaner comprising a lower housing part, on which wheels are mounted for moving the vacuum cleaner along a floor surface, and which forms a dirt collection container with a suction inlet to which a suction hose is connectable, and an upper housing part which is mountable on the lower housing part and accommodates an electrically drivable suction unit, and an electric supply cable for connecting the suction unit to an electrical voltage source. In order to develop the vacuum cleaner so that it is easier to handle, and the supply cable and the suction hose can be held in a simple way for storage on the vacuum cleaner and removed from the vacuum cleaner for use, it is proposed, in accordance with the invention, that the vacuum cleaner have a cable receptacle for storing the supply cable and a hose mount for storing the suction hose, the cable receptacle surrounding the upper housing part on the outside in the circumferential direction, and the hose mount being arranged below the cable receptacle.