Abstract: The invention relates to a bismaleimide compound of the formula (I) substantially free of oligomeric, amidic and uncyclized impurities: ##STR1## wherein Ar is an optionally substituted aromatic residue; andAr' is an optionally substituted aromatic residue which provides either good conjugation between the nitrogen-containing groups shown in formula (I) or steric or other restrictions capable of moderating the reactivity of an unreacted amine moiety attached to said residue, methods for their preparation and curable compositions containing them. The curable compositions may also be used in impregnated fibre reinforced materials and advanced composite materials.

Abstract: This invention provides a coating composition which utilizes a free radical initiator and an organic tintability additive which remains substantially unpolymerized even after the remainder of the coating composition is cured. Superior tintability and adhesion to polycarbonate makes this coating particularly suitable for making tinted opthalmic lenses.

Abstract: Disclosed is a water repellent for fibers, comprising an acryl-silicone graft copolymer which is prepared by a radical copolymerization reaction of an organopolysiloxane compound containing one radical polymerizable group with radical polymerizable monomers including an acrylate, a methacrylate or a mixture thereof as a main member.

Abstract: An optical sheetlike article possessing a glass transition point and a softening point both higher than 130.degree. C., a modulus of elasticity when bent of more than 50 kgf/mm.sup.2, a double refraction index not greater than 30 nm, a yellowness index of not greater than 5, a specific gravity of not more than 1.5, an amount of deflection of not more than 10 mm in a load flexure test, and a thickness of more than 0.3 mm and not more than 0.7 mm is provided, and is ideal for use in optical filters for display devices, substrates for liquid crystal display devices, substrates for optical recording discs, and optical lenses, among others.

Abstract: A polymerization method carried out in the presence of unsaturated organic peroxide chain transfer agents is disclosed. Also disclosed are (co)polymers and oligomers made by this process and articles of manufacture comprising one or more (co)polymers or oligomers made by this process. Furthermore, the use of these unsaturated organic peroxides as chain transfer agents is disclosed. The present process reduces the severe retardation of polymerization observed for unsaturated organic peroxide chain transfer agents of the prior art and, in some cases, even improves the monomer conversion in comparison to the control.

Abstract: Polysuccinimide and polyaspartic acid are prepared by polymerizing maleic anhydride, ammonia and water or maleic acid derivatives or fumaric acid derivatives in bulk or dissolved in solvents in a continuous kneading reactor. The polysuccinimide formed can be converted into polyaspartic acid and polyaspartate salts by hydrolysis.

Abstract: The invention relates to a dendritic macromolecule comprising a core and branches emanating from the core wherein the branches are based on vinyl cyanide and/or fumaryl dinatrile units. The invention also relates to processes for preparing these dendritic macromolecules. The dendritic macromolecules according to the invention are not sensitive to degradation through hydrolysis reactions and are also very stable at a high temperature. The processes are very suitable for large scale production of the dendritic macromolecules without requiring purification of reaction intermediates.

Abstract: Herein disclosed are a novel methacrylic copolymer capable of serving as a component for uniformly dispersing pigments in paints and varnishes and a dispersant comprising the copolymer. The dispersant for dispersing pigments in non-aqueous paints and varnishes comprises a methacrylic copolymer obtained by copolymerizing 10 to 85 parts by weight of at least one (meth)acrylate monomer selected from, for instance, alkyl (meth)acrylates, alkenyl (meth)acrylates, hydroxyalkyl (meth)acrylates and alkylalkenyl monoalkylene glycol (meth)acrylates, 10 to 60 parts by weight of aminoalkyl (meth)acrylate monomer and/or quaternary ammonium (meth)acrylate monomer and 5 to 30 parts by weight of a monomer carrying a terminal (meth)acryloyl group and having an average molecular weight ranging from 4000 to 1000000.

Abstract: Copolymers of particularly low viscosity, which can be prepared by a polymerization in bulk, in which one component (A) is initially charged and, in the further course of the polymerization, at least two olefinically unsaturated copolymerizable monomers (B) are added, of which at least one contains at least one COOH group and at least one is sterically-hindered are usefully employed in coating compositions.

Abstract: It concerns a monomer, a polymer obtained from the monomer and a process for obtaining the said polymer. The monomer consists of a polyether containing at least 3 ether units and pyrrole or thiophene units bonded to the ends of the chains of this polyether via, for each of these heterocycic compounds, either their carbon atoms in the 3,3'-positions of their heterocycles or, as regards more particularly the pyrrole groups, via their respective nitrogen atoms, the 2- and 2'-positions of these heterocycles being, however, free of all substitutions or, at the very most, substituted by easily removable groups (protective groups, for example).Application to the purification and recovery of metal ions such as radioactive silver.

Abstract: The present invention relates to bis-imidazolyl compounds of the formula: ##STR1## and polymers having the above-identified bis-imidazolyl compounds as a polymerizable unit. The present invention further relates to a method for scavenging trace quantities of metal ions from various effluents sources using the polymers of the instant invention. The instant invention also is directed to the use of the above-identified polymers as corrosion inhibiting agents and as a film for use in gel electrophoresis.

Abstract: Process for the free-radical polymerisation of olefinically unsaturated monomer(s) using a free-radical initiator, wherein said polymerisation is performed in the presence of a compound for effecting molecular weight control, said molecular weight control compound being selected from Cobalt II chelates of the following formulae I, II and III: ##STR1## wherein: x and y are independently 2 to 5;each R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is independently selected from H, C1-C12 alkyl, optionally substituted aryl, OR.sup.5 where R.sup.5 is C1 to C12 alkyl or optionally substituted aryl, CO.sub.2 R.sup.5, SO.sub.3 H, C(.dbd.O)R.sup.5, CO.sub.2 H, NO.sub.2, OH, NR.sup.5.sub.2, NH.sub.2, NHR.sup.5, SR.sup.5, SH, CN, SO.sub.3 R.sup.5, halogen, 2-furyl and 3-furyl;each X is independently selected from (CR.sup.6.sub.2).sub.n, (CR.sup.6.sub.2 O).sub.n, optionally substituted o-phenylene, and optionally substituted 1,8-naphthylene, where each R.sup.

Abstract: Polymeric dyes that comprise (a) segments that render the dyes soluble or dispersible in hydrocarbon solvents and (b) segments that impart color. The polymeric dyes can be introduced into hydrocarbon solvents or formed in hydrocarbon solvents to form stable colored dispersions, which can be used as toners for electrophotography. In these toners, the polymeric dye contains macromeric moieties that render the polymeric dye dispersible in hydrocarbon solvents. The polymeric dye may contain either a charge-directing chelating moiety or a surface-release promoting moiety or both of these moieties.

Abstract: A polymeric binder for ceramic materials is provided. The polymeric binder has a temperature range for pyrolysis which is broader than that for polymeric binders conventionally used in ceramic materials. The broader pyrolysis range provides for gradual removal of the binder when a ceramic part containing the binder is heated. Gradual removal of the binder minimizes the formation of voids and cracking in the ceramic part. Voids or cracking can lead to defects in the part, and destruction of the part may occur during removal if a polymeric binder used in the part is rapidly decomposed into gases. Therefore the polymeric binder of the present invention provides for ceramic parts with fewer defects and less chance of destruction than occurs with polymeric binders conventionally used in ceramic parts.

Abstract: A polymerizable liquid composition includesa polymerizable poly(allyl carbonate) of an aliphatic or cyclo-aliphatic polyol;an organic peroxide generator of free radicals selected from the group of perketals, and possiblyan organic dye and/or an organic photochromic compound.The compositions can be transformed, by bulk polymerization, into an organic glass which is colorless, or colored or photochromic, having good optical and mechanical characteristics.

Abstract: Copolymers of particularly low viscosity, which can be prepared by a polymerization in bulk, in which one component (A) is initially charged and, in the further course of the polymerization, at least two olefinically unsaturated copolymerizable monomers (B) are added, of which at least one contains at least one COOH group and at least one is sterically-hindered are usefully employed in coating compositions.

Abstract: Urea and urethane-containing monomers for contact lens materials are disclosed.

Abstract: Novel N-substituted maleimide homopolymers having a number-average molecular weight ranging from 12,000 to about 100,000 are prepared by anionically polymerizing an N-substituted maleimide monomer, in solvent phase, in the presence of at least one organometallic polymerization initiator which comprises sec-butyllithium, a sodium alcoholate, diphenylmethylpotassium, naphthalenelithium or naphthalenesodium, and novel N-substituted maleimide homopolymers having a polydispersity index ranging from 1.1 to 1.5 are prepared by anionically polymerizing an N-substituted maleimide monomer, in solvent phase, in the presence of at least one alkali metal organometallic polymerization initiator and at least one inorganic or organic salt of an alkali or alkaline earth metal; novel block copolymers include blocks of the above maleimido homopolymers and, e.g., blocks of an acrylic or methacrylic polymer.

Abstract: A curable composition which comprises:(a) an anhydride-functional polymer obtained by polymerizing under free radical addition polymerization conditions, a monomer mixture comprising:(i) 20 to 75 weight percent of an alkenyl succinic anhydride having the structure: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each independently hydrogen or alkyl or substituted alkyl of 1 to about 30 carbons; and(ii) 25 to 80 weight percent of at least one (meth)acrylic monomer copolymerizable with the alkenyl succinic anhydride; and, optionally,(iii) 0 to 75 weight percent of at least one unsaturated monomer, other than a (meth)acrylic monomer, which is copolymerizable with the anhydride and the (meth)acrylic monomer; and(b) a compound having an average of at least two functional groups per molecule which are reactive with anhydride groups.

Abstract: An oligomerized cyclobutarene containing 80 weight percent or more of oligomers of a degree of polymerization of three or more.