Abstract: Thermoplastics built up from N-(2-ethyl-6-methyl)phenylmaleimide and styrene, it being possible for all or some of the styrene to be replaced by at least one other monomer component.

Abstract: Copolymers comprisea) from 1 to 65 mol % of at least one diketene of the general formula I ##STR1## where R.sup.1 and R.sup.2, independently of one another, are each hydrogen or C.sub.1 -C.sub.30 -alkyl,b) from 30 to 70 mol % of at least one ethylenically unsaturated dicarboxylic acid or one dicarboxylic acid derivative,c) from 0.5 to 60 mol % of at least one ethylenically unsaturated hydrocarbon andd) up to 20 mol % of at least one further ethylenically unsaturated monomer,modified copolymers are obtainable by reacting these copolymers with NH-, SH- and/or OH-functional compounds, and the unmodified or modified copolymers are used as additives for mineral oil middle distillates.

Abstract: A polymer obtained by polymerizing a fumaric acid derivative represented by the following general formula (1): ##STR1## in which R.sup.1 represents an alkyl group having 1-6 carbon atoms and A denotes a radical of ##STR2## in which R.sup.2 and R.sup.3 represent each an alkyl group having 1-4 carbon atoms and may be identical with or different from each other, R.sup.4 denotes an alkyl group having 1-6 carbon atoms or a benzyl group and m and n denote each an integer of 1-6.

Abstract: This invention relates to an initiating system for the anionic polymerization of acrylic monomers, and where necessary vinyl comonomers, including at least one R-M initiator in which M is a metal chosen from among the alkali and alkaline earth metals and R is a linear or branched chain alkyl, aryl, or arylalkyl radical. The polymerization may also take place in the presence of at least one R.sub.1 OM.sub.1 alkali metal alcoholate, in which R is an linear or branched chain alkyl, aryl, or arylalkyl radical and M.sub.1 is an alkali metal, on the condition that when M.sub.1 is lithium, then R is an aryl or arylalkyl radical. This invention also related to a process for the polymerization of primary, secondary, or tertiary alkyl acrylates, and possibly of vinyl comonomers, in the presence of the initiating system described above.

Abstract: Novel heterobicyclic sulfonamide and sulfonic ester derivatives represented by the following general formula(I), which exhibit an antitumor activity and are lowly toxic, and processes for the preparation thereof.A sulfonamide derivative and a sulfonic ester derivative represented by the general formula (I) or a pharmacologically acceptable salt thereof: ##STR1## wherein A represents a monocyclic or bicyclic aromatic ring which may be substituted; B represents a six-membered unsaturated hydrocarbon ring or a six-membered unsaturated heterocycle containing one nitrogen atom, each of which may be substituted; C represents a five-membered heterocycle containing one or two nitrogen atoms which may be substituted; W represents a single bond or a group represented by formula --CH.dbd.CH--; X represents a group represented by formula --N(R.sup.1)-- or oxygen; Y represents carbon or nitrogen; Z represents a group represented by formula --N(R.sup.2)-- or nitrogen; and R.sup.1 and R.sup.

Abstract: A macromonomer composition, wherein at least 80 mol % of the macromonomer is a random copolymer of 2 to 1,000 units of monomers and having a very high content of acid monomers, i.e. >50% by weight of acid monomers, and an end group linked to the random copolymer having the formula:CH.sub.2 .dbd.C(C(O)OR.sub.1)(CH.sub.2 .paren close-st.,wherein R.sub.1 is selected from the group consisting essentially of H; an alkyl group of 1 to 8 carbon atoms; and X.sub.n (CH.sub.2 CH.sub.2 O).sub.m --R.sub.4 wherein n is 0 or 1, X is an alkyl, aryl or alkaryl diradical connecting group of 1 to 9 carbon atoms, m is 2 to 50, and R.sub.4 is H or an alkyl group of 1 to 4 carbon atoms. These macromonomers can be used effectively in solution form to prepare structured polymers such as block copolymers and graft copolymers for industrial applications.

Abstract: Polymerizable compositions comprising (a) hydroxypropyl methacrylate; (b) a C.sub.8 to C.sub.10 alkyl ester of acrylic or methacrylic acid; and (c) a free-radical initiator.

Abstract: This invention relates to novel peroxide blends which are liquid at 25.degree. C. and lower, their method of preparation and their use in curing peroxide crosslinkable polymers.The blend is a mixture of the meta isomers or the meta and para isomers of the compounds of Formulae I, II and III and optionally Formula IV (all as defined herein) in such proportions that the composition provides a liquid mixture at 25.degree. C. or below which has a high crosslinking efficiency for polymeric materials.

Abstract: Disclosed are methods for inhibiting late radiation-induced skin damage during treatment of a patient with ionizing radiation by application of a layer of biocompatible polymer to the skin surface prior to exposure of the surface to ionizing radiation.

Abstract: Disclosed are methods for inhibiting acute radiation-induced skin damage during treatment of a patient with ionizing radiation by application of a layer of biocompatible polymer to the skin surface prior to exposure of the surface to ionizing radiation.

Abstract: The present invention relates to materials which comprise a surface having pendant groups of formula (I), in which the groups --B-- are the same or different, preferably the same, and each is --CH.sub.2 -- or --C(.dbd.O)--, preferably --CH.sub.2 --, R.sup.1 is hydrogen alkyl of 1 to 12, preferably 1 to 4 carbon atoms, or a group capable of bonding to, or bonded to, a ligand or R.sup.1 is a polymerisable, preferably ethylenically unsaturated, group and Z is a zwitterionic group. Usually both groups B are the same and are joined to identical groups so that the compound of formula (I) is achiral. New compounds are achiral glyceryl phosphatidyl choline analogues. Surfaces having the groups (I) at their surface have improved biocompatibility, and show reduced fibrinogen absorption, reduced platelet activation, reduced microorganism adhesion and are useful in the production of implants or prostheses, for extra-corporeal circuitry for body fluids, for treating membranes of various type, for contact lenses.

Abstract: Crosslinked copolymers of vinyl pyrrolidone (VP) and dimethylaminoethyl methacrylate (DMAEMA) for use in personal care products are made herein in aqueous solution by copolymerization of VP and DMAEMA monomers in aqueous solution using 1-vinyl-3-(E)-ethylidene pyrrolidone (EVP) as the crosslinking agent. The product is a one-phase, aqueous gel of the copolymer which is useful in hair care products.

Abstract: The present invention provides a cation-modified linear copolymer which comprises, within the molecule thereof, 95 to 85 mole % of an ethylene structural unit, 0.1 to 10 mole % of an ester structural unit represented by general formula (II), 0.1 to 6 mole % of an acrylic or methacrylic acid structural unit and 1 to 12 mole % of an amide structural unit represented by general formula (IV). The copolymer has a weight-average molecular weight of 1,000 to 100,000. When incorporated in thermoplastic resins, it shows good compatibility and results in good mechanical properties.

Abstract: The present invention relates to retention aids for papermaking, in particular which comprise cationic multiarmed star-like polymers of formula (I):(D).sub.y --(A).brket open-st.B--(CH.sub.2).sub.n --(E).sub.p --(F).sub.q .brket close-st..sub.x (I)as an effective component to improve the retention of fines fraction by structural characteristics of multiarmed polymer chains connected with one starting point on the compound. In formula (I), A is ##STR1## B is --O-- or --COO--; D is --OH; E is ##STR2## F is ##STR3## wherein, R.sup.1 --R.sup.11 are independently hydrogen or alkyl; R.sub.a --R.sub.d are independently hydrogen or alkyl; X.sup.- is ##STR4## x is an integer selected from 3 to 24; y is an integer selected from 0 to 21; n is an integer selected from 3 to 6; p is an integer selected from 300 to 4000; and q is an integer selected from 0 to 1000.

Abstract: Polymers based on combination of different repeating units derived from hydroxy styrene and hydroxyvinylcyclohexane derivatives wherein a portion of the hydroxyl groups are replaced with either acid-labile acetal or ketal protecting groups and where a portion of the repeating groups comprise two crosslinked species connected via the protecting groups.

Abstract: Thermoplastics built up from N-(2-ethyl-6-methyl)phenylmaleimide and styrene, it being possible for all or some of the styrene to be replaced by at least one other monomer component.

Abstract: Co-oligomers and copolymers having dispersant activity and usable as emulsifiers are based on esters of (meth)acrylic acid; where the co-oligomers and copolymers are comprised of the following components:(A) 60-95 wt. % of at least one (meth)acrylic acid ester of formula I ##STR1## where R represents hydrogen or methyl, andR.sub.1 represents a (possibly branched) alkyl group or a cycloalkyl group with 4-32 carbon atoms in the alkyl group; and(B) 5-40 wt. % of a (meth)acrylic acid ester of formula II ##STR2## where R' represents hydrogen or methyl,R.sub.2 represents an alkyl or aryl group with 1-50 carbon atoms, where R.sub.2 itself may be substituted with nitrogen or sulfur,n may be a number from 5 to 100, andm may be a number from 0 to 100;and, in the amount of 0-90 mol % of the monomer(s) of formula II, a hydroxyalkyl ester of (meth)acrylic acid, of formula III: ##STR3## where R" represents hydrogen or methyl, andR.sub.

Abstract: The present invention describes novel statistical copolymers and the preparation and possible uses thereof. Copolymers are described that are water-soluble and cross-linkable and that comprise the copolymerisation product of a monomer mixture consisting substantially of a vinyl lactam (a) and at least one further vinyl monomer (b) of a different type selected from the group consisting of hydrophobic, hydrophilic and functional vinyl monomers, wherein the monomers are present in the copolymer in the form of statistically distributed building blocks, and, if a functional vinyl monomer is present as a building block in the copolymer, that building block is, where appropriate, modified with a reactive vinyl monomer (c), the reactive vinyl monomer (c) being linked to a building block of a functional vinyl monomer with retention of its vinylic group and with the formation of a covalent bond.

Abstract: An aqueous polymerization method is disclosed for forming polymers containing, as polymerized units, at least one monomer having low water solubility, including the steps of:(1) complexing at least one monomer having low water solubility with a macromolecular organic compound having a hydrophobic cavity; and(2) polymerizing in an aqueous system from about 0.1% to about 100%, by weight of the monomer component, based on the total weight of the polymer, of the complexed monomer having low water solubility with from about 0% to about 99.9% by weight, based on the total weight of the polymer, of at least one monomer having high water solubility.The method is also useful for forming aqueous solution polymers having low water solubility.

Abstract: A water-soluble polymer and a process for using the polymer for applications in a subterranean formation are provided. The polymer comprises repeat units derived from a nitrogen-containing olefinic monomer and optionally an olefinic comonomer. The polymer can be used in drilling fluids, workover fluids, completion fluids, permeability corrections, water or gas coning prevention, fluid loss prevention, matrix acidizing, fracture acidizing, and combinations of any two or more thereof.