Abstract: Particular maleimides work as gel-inhibitors during the addition reaction of maleic anhydride and diene polymers.

Abstract: New compositions and a process for the preparation of conjugated diene polymers of broadened molecular weight distribution by reacting non-terminated lithium catalyzed conjugated diene polymers with linear organic compounds selected from the group of carbonates, thiocarbonates and sulfites. The resulting new compositions are suitable for use in making high impact plastics and for fabricating rubber goods.

Abstract: The invention relates to the carbonylation of cross linked substituted and unsubstituted polysaccharides, their copolymers with macroporous synthetic polymers, macroporous synthetic polymers and rigid supports with pendant hydroxyalkyl groups. The carbonylated product can be used to prepare an affinity chromatography matrix which remains an uncharged species at varying pH's. The carbonylated product is also useful for the preparation of other compounds: Typical polysaccharides are agarose, starch, dextran, cellulose and regenerated cellulose, typical macroporous synthetic polymers are acrylamides, acrylates and methacrylates, typical rigid supports are silica beads coated with hydroxy alkyl groups and typical cabonylating agents are N,N'-carbonyl diimidazole; N,N'carbonyl di-1,2,3-benzotriazole; and N,N'-carbonyl di-1,2,4-triazole.

Abstract: The precipitation from solution of amine phosphate salts is materially inhibited by incorporating at least one carboxylated nitrile elastomer into compositions containing at least one tertiary dimethylaryl amine and at least one unsaturated organic monoester of phosphoric acid.

Abstract: A process for preparing a modified block copolymer by graft-reacting at least one maleic acid compound with an aromatic vinyl compound/conjugated diene compound block copolymer containing at least one polymer block mainly composed of a conjugated diene compound and at least one polymer block mainly composed of an aromatic vinyl compound, the aromatic vinyl compound/conjugated diene compound weight ratio being within the range of 5/95 to 97/3, characterized in that said graft-reaction is carried out under conditions wherein the generation of radicals can be substantially inhibited. According to this process, it is possible to prevent gelation of the product in the graft-reaction, and the modified block copolymer obtained has excellent appearance characteristics, mechanical properties, and transparency.

Abstract: A photopolymerizable composition comprising (1) an addition-polymerizable compound having at least one ethylenically unsaturated double bond and (2) a photopolymerization initiator as essential components, the improvement which comprises the photopolymerization initiator comprising a combination of (a) a 5-isoxazolone represented by the general formula (1) and (b) an aromatic carbonyl compound, a dialkylamino aromatic carbonyl compound represented by any of formulae (2) to (5), a compound represented by the formula (6) or 2-(.alpha.-thioxophenetylidene)-3-methylnaphtho[1,2-d][1,3]-thiazoline: ##STR1## wherein in the formula (1), A.sup.1 and A.sup.2 each represent an alkyl group, an alkylcarbonyl group, an alkoxycarbonyl group, an aryl group, an arylcarbonyl group or a hydrogen atom and may be the same or different; in the formulae (2) to (5) R.sup.1 and R.sup.2 each represent an alkyl group and may be the same or different, R.sup.

Abstract: The adhesive or adhesive component according to the invention, which contains a vinyl monomer, a vinyl polymer, a compound producing free radicals, and, as an adhesion promoter, an acid amide or imide which is substituted on the nitrogen atom by a chlorosulfonated alkyl, aryl or aralkyl group, forms, together with an amine accelerator, an adhesive with which heat-, oil- and water-resistant bonds, for example of metals, polymeric materials, glass and ceramics, having very high tensile shearing strength can be obtained. The adhesive can also be converted into the form of a dried sheet, with or without carrier, and in this form can be used for bonding.

Abstract: A family of negative resins, capable of undergoing crosslinking under the effect of more or less energetic photons (gamma radiation, X-rays, ultraviolet or visible light), applicable to the protection of objects against atmospheric agents and to the production of masks of the type used in the production of integrated circuits. The typical compound according to the invention contains at least one substance of which the chemical formula comprises a thiirane ring: ##STR1## such as 2,3-epithiopropyl methacrylate copolymerized with a vinyl monomer, such as methyl methacrylate. Crosslinking is facilitated by photoinitiators, such as aryl diazonium and aryl iodonium salts liberating Lewis acids. By selecting the photoinitiator, it is possible to act on the spectral region where irradiation is effective.

Abstract: Esters of tetracarboxylic acids having the following general formula:(RO.sub.2 C').sub.2 .dbd.X.dbd.(C"O.sub.2 R').sub.2wherein .dbd.X.dbd. is selected from tetravalent 5 or 6 membered or a double 6 membered ring system and wherein C' and C" carbons are attached to separate pairs of vicinal carbons and R and R' are selected from halogenated organic radicals containing at least 2 atoms of chlorine or bromine and the other of each R and R' is selected from --H, --CH.sub.2 CH(OH)CH.sub.2 O.sub.2 CCR".dbd.CH.sub.2, and --CH[CH.sub.2 (OH)]CH.sub.2 O.sub.2 CCR".dbd.CH.sub.2 are useful in the preparations of high molecular weight polymers and copolymers which are improved in fire retardance and strength.

Abstract: A dry grafting method of grafting a vinyl monomer onto a polymer, which method comprises admixing into an essentially dry, solvent-swollen, finely-divided, particulate, solid, polymer admixture, wherein the polymer has free radicals formed thereon and the admixture is essentially free of a polymerization initiator, a small grafting amount in incremental portions of a vinyl-monomer material to be grafted onto the swollen polymer, the amount of vinyl monomer sufficient to maintain an essentially free-flow, stirrable, particulate admixture, and effecting grafting of the vinyl monomer to the polymer.

Abstract: A process for the preparation of modified poly-N-vinylpyrrolid-2-one containing two identical reactive groups, wherein polyvinylpyrrolidone is treated with complex hydrides, with or without further reaction of the modified polyvinylpyrrolidone with a reactive bifunctional compound, to give a polymer which has a molecular weight at least 2.5 times as great as that of the starting polymer.

Abstract: A photopolymerizable mixture for the preparation of printing plates and photoresists is disclosed which contains a polymeric binder, an ethylenically unsaturated polymerizable compound and, as a photoinitiator, a compound having the formula ##STR1## wherein R is an aromatic group which may be substituted and n is 1 or 2.

Abstract: Flame retardation of 1,2-polybutadiene based upon the use of halogenated bisphenol bisacrylate reactive flame retardants, for example, 2,2-bis(4-methacryloyl-3,5-dibromophenyl)-propane. Flame retardancy performance of UL 94 V-0 or V-1 has been achieved without impairing desirable dielectric properties and heat resistance inherently possessed by 1,2-polybutadiene. If an aromatic bismaleimide modifier, for example, N,N'-4,4'-diphenylmethane bismaleimide, is jointly used, a thermal expansion coefficient less than a half of the thermal expansion coefficient of cured 1,2-polybutadiene can be achieved.

Abstract: Isobutylene-based elastomers containing 3-15 mol percent enchained cyclic diolefin such as cyclopentadiene, and other comonomers such as isoprene, piperylene and butadiene to allow for chemical modification with anhydride, carboxy, hydroxy, etc. to produce a one package through cure system.

Abstract: A process for the preparation of modified poly-N-vinylpyrrolid-2-one containing two identical reactive groups, wherein polyvinylpyrrolidone is treated with complex hydrides, with or without further reaction of the modified polyvinylpyrrolidone with a reactive bifunctional compound, to give a polymer which has a molecular weight at least 2.5 times as great as that of the starting polymer.

Abstract: Isobutylene-based elastomers containing 3-15 mol percent enchained cyclic diolefin such as cyclopentadiene, and other comonomers such as isoprene, piperylene and butadiene to allow for chemical modification with anhydride, carboxy, hydroxy, etc. to produce a one package through cure system.

Abstract: By block-copolymerizing a mixture of an aromatic vinyl compound and a conjugated diene in two stages in an aliphatic hydrocarbon solvent, using an organomonolithium compound or an organodilithium compound as a polymerization initiator, a block copolymer is formed as a suspension polymer in a slurry state.The resulting block copolymer is very clear and excellent in mechanical properties, especially, strength, elongation and impact strength. It has a wide application in the field of general resins.

Abstract: An adhesive composition comprising a 2-cyanoacrylate and at least one member selected from the group consisting of substituted or unsubstituted aliphatic carboxylic acids having three or more carboxyl groups, anhydrides thereof, partial esters thereof, aromatic polycarboxylic acids having three or more carboxyl groups and anhydrides thereof. This composition has a high impact strength, is suitable for bonding metallic substrates to one another and is also excellent in resistance to heat, weather, and water.

Abstract: 2,2,6,6-tetraalkyl-4-piperidyl ketones and ketals are provided, useful as stabilizers for organic polymeric materials, and having the general formula: ##STR1## wherein n are each 0 or 1 and are each the same;R is selected from the group consisting of hydrogen, alkyl having from one to about eighteen carbon atoms, and acryl ##STR2## R' being alkyl having from one to about eighteen carbon atoms; R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are selected from the group consisting of hydrogen and alkyl having from one to about eighteen carbon atoms;R.sub.6 is selected from the group consisting of hydrogen and O.sup..