摘要:
The present invention relates to a process for the preparation of polyether-polycarbonates, a process for stabilizing the polyether-polycarbonates thus prepared, a process for the production of membranes from the polyether-polycarbonates prepared according to the invention, stabilized membranes obtainable by the process according to the invention and the use of the polyether-polycarbonate membranes obtainable by the process according to the invention for dialysis, ultrafiltration and reverse osmosis.
摘要:
Certain solutions of phosphines in oxetane compounds impart oxidative stability to aromatic thermoplastic polycarbonates in which such solutions are admixed.
摘要:
Certain spirocyclic ketals of the formula ##STR1## in which R.sup.1 in the case where R.sup.2 denotes hydrogen, represents a cyclohexyl radical optionally substituted by lower alkyl, lower alkoxy and/or cycloalkyl with 5 to 7 carbon atoms, or in whichR.sup.1 and R.sup.2 are linked through 4 methylene groups, which are optionally substituted by lower alkyl, lower alkoxy and/or cycloalkyl with 5 to 7 carbon atoms and form a further acyclic ring.R.sup.3, R.sup.4 and R.sup.5 are identical or different and denote hydrogen, lower alkyl, lower alkoxy or cycloalkyl with 5 to 7 carbon atoms, andZ denotes alkylene with 2 to 4 carbon atoms which is optionally substituted by lower alkyl and/or cycloalkyl with 5 to 7 carbon atoms,are disclosed together with their use in power transmission fluids.
摘要:
Increasing the electrical conductivity of conjugated polymers by partial oxidation (doping) with a compound of tetravalent titanium or tetravalent tin.
摘要:
By adding reaction products of from 4- to 6-hydric alcohols and dicarboxylic acid anhydrides, it is possible to render originally water-insoluble polyesters dilutable with water. Stoving lacquers based on such systems give highly weather-resistant lacquer films.
摘要:
The present invention relates to mixtures of polycarbonates containing hydrogenated dimeric fatty acid esters as condensed units, and polyolefines and, if appropriate, other high-molecular weight, aromatic thermoplastic polycarbonates.
摘要:
The invention relates to an aerially-crosslinking, pigmented or non-pigmented coating agent consisting of conventional lacquer auxiliaries and an aerially-crosslinking binder which has been reacted to form a dicarboxylic acid semi-ester by the reaction of a copolymer consisting of copolymerized units of at least one ester carrying at least one 1,2-epoxide group or hydroxyl group of an .alpha.,.beta.-monoolefinically unsaturated C.sub.3 -C.sub.5 -carboxylic acid and at least one vinyl or vinylidene monomer which is different therefrom with at least one drying fatty acid and optionally with at least one cyclic dicarboxylic acid anhydride, characterized in that the coating agent contains as an additional lacquer auxiliary from 0.2 to 2% by weight of at least one .alpha.-dicarbonyl compound, based on the aerially-crosslinking binder.
摘要:
Esterification products of monoalcohols and dicarboxylic acids, or of polyhydric alcohols and monocarboxylic acids respectively, containing 5 to 45% by weight of units of hydroxycarboxylic acids and having a ratio of carbon to oxygen atoms greater than 4.1 obtained from (a) aliphatic C.sub.1 -C.sub.14 alcohols, (b) aliphatic C.sub.4 -C.sub.18 carboxylic acids and optionally cycloaliphatic C.sub.6 -C.sub.12 and aromatic C.sub.7 -C.sub.12 carboxylic acids, and (c) lactones of aliphatic C.sub.5 -C.sub.12 hydroxycarboxylic acids. They are suitable for the preparation of lubricants and lubricant compositions.
摘要:
An air-drying lacquer binder comprising a copolymer of copolymerized units of20 to 55% by weight of styrene,5 to 30% by weight of glycidyl(meth)acrylate, and0 to 50% by weight of at least one (meth)acrylic acid ester with 1 to 10 carbon atoms in the alcohol component,Which has been esterified with0 to 15% by weight of at least one natural, drying fatty acid, and10 to 50% by weight of isomerized drying fatty acids(the sum of the percentage contents amounting to 22 - 50 percent by weight) based on the copolymer and drying fatty acids and dicarboxylic acid anhydride subsequently used, up to an acid number of