Abstract: Copolymers of alpha-methylstyrene-type monomers and conjugated diene monomers are prepared by polymerizing an alpha-methylstyrene monomer using a first polar activator, adding a small amount of a conjugated diene monomer to cap the block of alpha-methylstyrene-type monomer polymer, and further adding a conjugated diene monomer and polymerizing with a second polar activator effective for copolymerization of residual alpha-methylstyrene-type monomer. The resulting copolymer can be coupled to form linear or radial block copolymers.

Abstract: Polymers containing imide units and a process of imidizing acrylic polymers to any desired degree of imidization without the use of added water or solvent.

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: The invention relates to a solid insoluble carrier which is activated for bonding of nucleophilic groups and to a method of its preparation. The carrier contains active groups --O.CO.O.R, where R is the residue selected from the group comprising nitrophenyl, dinitrophenyl, trichlorophenyl, pentachlorophenyl, N-succinimidyl, N-phthalimidyl, and 8-quinolinyl. Active groups are bonded to polysaccharides, phenol-formaldehyde resins, polyacrylates, or polyacrylamides. The invention further relates to a method for preparation of the polymeric carrier, which consists in treatment of polymers carrying hydroxyl functions and selected from the group comprising polysaccharides, phenol-formaldehyde resins, polyacrylates, and polyacrylamides, with esters of chloroformic acid which contain the above mentioned active groups.

Abstract: A silicon peroxide selected from the formulas:(R').sub.4-n --Si--(OOR).sub.n (a) ##STR1## wherein n is an integer of 1-3; R is a t-octyl group in which a tertiary carbon atom is directly bonded to the peroxy group; and R' is selected from alkyl, phenyl, and alkenyl (provided n is not more than 2), and a carbon chain which forms a saturated heterocyclic ring with the silicon atom, each R' group having up to about 10 carbon atoms. Typical is trimethyl (2,4,4-trimethyl-2-pentylperoxy) silane. These molecules are useful as catalysts for curing polyester resins and are particularly advantageous as crosslinking agents for high density polyethylene in that crosslinking is effected at lower temperatures than required by the prior art.

Abstract: A method is provided for the preparation of an acrylate copolymer having a number average molecular weight of 400-2000 by polymerization of a monomer mixture consisting of 35-60 mole % of styrene and/or .alpha.-methyl styrene, 20-60 mole % of acrylic acid and/or methacrylic acid and 0-30 mole % of one or more other monovinyl compounds in the presence of a 2 to 8 carbon atoms-containing mercaptomonocarboxylic acid or mercaptodicarboxylic acid as chain length regulator in an amount of 0.05 to 0.2 moles per mole of the monomeric compounds, after which the resulting reaction product is brought into reaction with a glycidyl ester of a monocarboxylic acid. The invention also relates to a liquid coating composition having a solids content of at least 60% by weight based on the acrylate copolymer thus prepared and a curing agent.

Abstract: A solid tire and wheel assembly for vehicle moving through a tubular conduit having excellent abrasion resistance particularly excellent uneven wear resistance is produced by forming a composition layer composed of (a) a diene elastomer, (b) .alpha.,.beta.-ethylenically unsaturated carboxylic acid, (c) a divalent metal compound and (d) an organic peroxide on the outer circumferential surface of the metal rim of the wheel and curing said layer by heating.

Abstract: An article of manufacture having heat-alterable memory characteristics consisting of a shaped, vulcanized composition comprising a hydrogenated polybutadiene which in its unhydrogenated state contains from about 15 to about 55 percent trans 1,4-addition and from about 15 to about 40 percent cis 1,4-addition, the article being in a dimensionally heat-unstable condition capable of altering its physical form upon application of heat alone. The article is produced by hydrogenating the above-described polybutadiene, shaping and vulcanizing the hydrogenated polybutadiene and subjecting the shaped, vulcanized article to a force sufficient to alter its dimensions.

Abstract: In accordance with an exemplary embodiment of the instant invention, a volatile cross-linking agent such as liquid peroxide is introduced, at ambient temperature and under atmospheric pressure directly into the input of an extruder at the same pressure as a polyolefin compound to be cross-linked. The resulting compounds are put under pressure within the extruder as the temperature increases so that the mixture reaches its definitive shape at the extruder output and may be fed directly into a hot cross-linking enclosure which is maintained under pressure. The peroxide is thus incorporated in a single operation permitting complete control of the ingredients mixed and allowing perfect homogenization of the mixture while defusion and consequent loss of the highly volatile peroxide are avoided. The system for introducing the highly volatile cross-linking agent includes a peroxide storage tank, a filling pump, a feed vessel, an incremental feed pump with a pressure meter, a flow meter and numerous safety features.

Abstract: This invention discloses a method for converting a nitrile rubber substrate urface to a chemically active surface whereupon said surface reacts with an adhesive to form a permanent bond with said adhesive. The nitrile rubber substrate surface is so converted by treatment with a dilute mineral acid.

Abstract: An anaerobic adhesive comprising as a bond forming system a polymerizable aromatic-based acrylate monomer and a compatible liquid butadiene acrylonitrile copolymer, together with a latent initiator for the polymerization, said aromatic based acrylate monomer having the general formula ##STR1## where: Ar is a divalent aromatic residue;R.sub.1 and R.sub.2 represent hydrogen, alkyl, aryl, or hydroxyalkyl groups, or halogen; andR.sub.3 and R.sub.4 represent ##STR2## where m is an integer of from 1 to 20 and R.sub.5, R.sub.6, and R.sub.7 represent hydrogen, alkyl, or alkoxy groups, or halogen, the same or different.

Abstract: The invention relates to a process for the anionic polymerization and copolymerization of vinyl, dienic and heterocyclic monomers.According to the invention, the process consists in carrying out the reaction in the presence of an initiator consisting of a molecular combination of an alkali metal amide and the salt of the same alkali metal with at least one hydroxylic compound and in the absence of solvent. The initiator can be prepared by intimately mixing its constituents or in the presence of a solvent of low polarity which is subsequently evaporated off, or in situ in the monomer.Application to the synthesis of special or widely used polymers and copolymers.

Abstract: A process is disclosed for the preparation of styrene and acrylonitrile containing polymers wherein styrene and acrylonitrile in a predetermined ratio are introduced continuously into a recirculating polymerization zone of generally constant composition wherein a portion of the styrene and acrylonitrile is polymerized, material is removed from the polymerization zone at a rate equal to the addition of styrene and acrylonitrile on removal from the polymerization zone the monomer being separated from the resulting polymer, the improvement being maintaining a level of oxygen in the styrene and acrylonitrile not greater than 20 parts per million by weight based on the weight of the styrene and acrylonitrile. The resultant polymer is generally colorless.

Abstract: Ambient temperature curable compositions comprising a hydroxyl containing organic polymer and an aminosilicon compound, said compositions being useful as protective coating compositions.

Abstract: There is provided a process for the dyeing and printing of polyester textile fabrics with different shaded color effects on one or both sides of the fabric, comprising contacting the polyester fabric as such or having been previously dyed in light pastel shades, with an aqueous dye bath containing at least one hydrophobizing substance, drying the so-treated fabric, printing on one or both sides thereof with disperse dyes and affixing the dyes to the surface by thermosoling.

Abstract: A process for the bulk or suspension polymerization of vinyl chloride or vinylidene chloride, in the presence of a redox catalyst system consisting of a peroxyester or a diacyl peroxide and a stannous or antimony (III) mercaptide.

Abstract: A method of dyeing a tufted pile carpet on location. The method comprises the steps of spraying a dye liquor onto the pile of the carpet, spraying a sealer onto the pile of the carpet to fix the dye therein and drying the carpet.

Abstract: Acrylonitrile-butadiene-styrene (ABS) resins are prepared by the mass or mass-suspension process employing a tertiary-butyl peroxy initiator having a 10-hour half-life between about 50.degree. and 95.degree. C. wherein initial polymerization of up to about 10 weight percent solids is conducted under plug flow conditions. From about 5 to 10 percent conversion to about 40 percent conversion is polymerized with agitation. The remaining polymerization is done with or without agitation. Improved impact resistance is obtained.

Abstract: Orthoesters are used to couple living homopolymers of monovinylarenes, and living copolymers of monovinylarenes and conjugated dienes. Novel coupled polymers are thereby produced.

Abstract: Alkali metal-terminated polymers of one or more alkadienes and of one or more vinyl-substituted aromatic monomers are effectively coupled by an anhydride of a monocarboxylic acid having 2 to 8 carbon atoms per molecule.