Abstract: A method of removing vinyl chloride monomer which remains in a polymer of vinyl chloride, which comprises irradiating the polymer of vinyl chloride with a high energy electromagnetic wave to excite the vinyl chloride monomer in said polymer to remove unreacted monomer.

Abstract: Sulfenylthiocarbonates are used to inhibit prevulcanization in rubbers compounded with vulcanization agents. The sulfenylthiocarbonates include methoxycarbonyl 1-dodecyldisulfide; 1,2-bis(methoxycarbonyldithio)-ethane and 1,4-butylenedioxybis(carbonyldithioethane).

Abstract: The invention relates to reduction of polymer buildup during the suspension polymerization of vinyl chloride, either alone or with other olefinically unsaturated monomers copolymerizable therewith. There is employed a particular combination of ingredients in the polymerization recipe, the essential features being the use of a water phase inhibitor and an oil phase inhibitor along with a substantially water-insoluble polymerization initiator and operating at a high pH. A multiplicity of charges may be polymerized in the reactor without opening the same.

Abstract: Superior artificial teeth, dentures, other dental replacement parts and dental prosthetic articles and devices, which exhibit high abrasion resistance, stability to moisture and which do not undergo volume changes, are obtained by polymerization of a compound of the formula ##STR1## in which R is H or -CH.sub.3, X is an alkylidene or the -SO.sub.2 -group, Y is an oxyalkylene group having between 2 and 5 carbon atoms, or an alkylidene group having between 1 and 5 carbon atoms. In some instances, the polymerization is carried out in the presence of a filler.

Abstract: A method for preventing polymer buildup in the polymerization reactor during the suspension polymerization of vinyl chloride monomer to form polyvinyl chloride polymer and copolymers, the method comprising coating reactor surfaces in contact with the reaction medium with a material selected from the group consisting of alumina, dithiooxamide, and mixtures of these prior to carrying out this polymerization.

Abstract: Elastomeric butadiene-piperylene copolymers in which the butadiene is mainly in high cis-1,4-addition, low vinyl configuration, prepared in solution using iodine-containing catalyst based on organomagnesium compound and titanium tetrahalide. Graft copolymers of resin-forming monomers (e.g., styrene, acrylonitrile) on the butadiene-piperylene elastomer have good low temperature impact strength.

Abstract: Monoazo dyestuffs having the general formula: ##STR1## in which the hydroxyl group is in the 2- or 4-position relative to the azo group and wherein R.sup.1 represents a hydrogen or halogen atom or an alkyl, cycloalkyl, aryl or alkoxy group and R.sup.2 represents a hydrogen atom or alkyl group.The dyestuffs are useful as acid dyes for nylon.

Abstract: An improved process for the production of powders of maleic acid anhydride/1-olefin copolymers by suspension polymerization in the presence of special dispersion agents which are obtained by the reaction of a copolymer of maleic acid anhydride and a 1-olefin with an aliphatic monohydric alcohol or an aliphatic monoamine or a mixture thereof, at least 30 mol % of the anhydride groups being esterified to semi-esters or amidated to semi-amides. The copolymer powders obtained have a surprisingly narrowparticle size distribution and can be used without grinding or sifting as reactive fillers for natural and synthetic rubbers. They also can be used for the production of paper coating agents as they dissolve easily and without residue in alkalis, ammonia or amines.

Abstract: Method of polymerizing conjugated diolefinic monomers containing from 4 to about 12 carbon atoms to high molecular weight polymers by bringing said monomers into contact with a catalyst system consisting of (1) an iron-containing compound, (2) an organometallic reducing agent from Groups I and III of the Periodic Table, and (3) a nitrogen-containing ligand.

Abstract: Ureas such as 1,3-bis(morpholinothio)-imidazolidinone are used to affect the vulcanization characteristics of sulfur vulcanizable polymers by increasing the state of vulcanization and improving scorch resistance and/or increasing the rate of vulcanization.

Abstract: Premature vulcanization of rubbers is inhibited by the incorporation therein of a dithioformimidate compound such as methyl N-phenyl-1-(methyldithio)-formimidate.

Abstract: Polymers or copolymers of acid anhydride type norbornene derivatives and a method of preparing the same, said polymers or copolymers being formed with a reduced viscosity of 0.1 to 20 by ring-opening polymerization of acid anhydride type norbornene derivatives having at least one carboxylic anhydride group or a mixture of said norbornene derivatives and cycloolefins.

Abstract: There is disclosed a new class of substantially linear, amorphous, unsaturated, vulcanizable, high molecular weight copolymers of ethylene, a higher alpha-olefin of the formula CH.sub.2 = CHR in which R is an alkyl group containing from 1 to 6 carbon atoms and certain specific omega-alkenyl derivatives of norbornene in which the double bond of the alkenyl group is non-vinyl and occurs at either end of said group. A process for the preparation of the new copolymers by the use of catalysts acting according to an anionic coordinate mechanism is also disclosed.

Abstract: Vinyl chloride emissions from the gaseous phase of large scale vinyl chloride batch emulsion polymerizations are reduced by discharging the liquid phase only of the polymerizate to a discharge zone at a pressure differential of 0.1-2.5 atmospheres lower than the reactor provided by residual vinyl chloride in the reactor, maintaining the reactor unopened; and then conducting another vinyl chloride polymerization in the reactor in the presence of the residual vinyl chloride from the prior polymerization.

Abstract: Process for dyeing or printing synthetic or artificial hydrophobic textile fibers in an aqueous medium with a 1:1 premetallized dyestuff complex of monocationic character of a transition metal, the cationic part of which dyestuff does not contain an ionized group (dyestuff (I)), in which the fibers are treated at a temperature at least equal to 80.degree. C. with a complexing agent (III), sparingly soluble in water and not containing an ionized group and more soluble in the fiber than in the aqueous dyeing medium of pH from 3 to 7, and with the premetallized dyestuff (I), the complexing agent being capable of fixation on the metal of the premetallized dyestuff with liberation of a proton, and synthetic or artificial hydrophobic textile fibers dyed or printed by such process.

Abstract: A novel polymer of a vinyl benzyl ether monomer and at least one other copolymerizable monomer, at least one of which other monomers has a carboxylic acid group, an anhydride group, a sulfate group, a sulfonate group or a hydroxyl group is disclosed. The vinyl benzyl ether monomer has the formula ##STR1## wherein R is hydrogen or methyl, m is about 10 to 100 and Y is ##STR2## where R.sub.1 is an alkyl, aralkyl or alkaryl hydrophobic group of 10 to about 22 carbon atoms, R.sub.2 is an alkyl group of 1 to about 22 carbon atoms and R.sub.3 is hydrogen or an alkyl group of 1 to about 22 carbon atoms, provided R.sub.2 and R.sub.3 in combination have at least 10 carbon atoms.

Abstract: The method for preparing synthetic powders based upon polyvinyl chloride or vinyl chloride copolymers by spray drying the polymer dispersions is improved by using single material nozzles with atomizing pressures of about 550 to 1000 bars where a bar is a C.G.S. unit of pressure equal to 750 mm of Hg.

Abstract: A process for the coloration of polyamide textile materials which comprises treating a polyamide textile material with an aqueous solution of an azo dye of the formula: ##SPC1##Wherein A represents the residue of a diazo component of the benzene or naphthalene series; X represent =N--, ##EQU1## Y represents chlorine or bromine; Q.sup.1 represents --O-- or --S--; Q.sup.2 represents a direct link, --O--, --CO--, --SO.sub.2 --, --SO.sub.2 NH--, --NHSO.sub.2 --, --CONH--, --NHCO--, --COO--, --OCO--, --SO.sub.2 --, --S-- or --NR.sup.4 -- in which R.sup. 4 represents hydrogen or lower alkyl; R.sup. 1 represents an alkylene, cycloalkylene or arylene radical; R.sup.2 represents an optionally substituted alkyl, cycloalkyl, aralkyl or aryl radical such that R.sup.1 and R.sup. 2 together contain not more than 13 carbon atoms; R.sup.3 represents hydrogen or lower alkyl and ring B may carry one or more substituents.

Abstract: Storage-stable, concentrated, aqueous, disazo acid dye solution consisting essentially of 10-25 weight % of the lithium or tri(2-hydroxyethyl)ammonium salt of ##SPC1##Wherein one of X and Y is H and the other is CH.sub.3 and R.sup.1 is CH.sub.2 CH.sub.2 OH, CH.sub.2 CH(CH.sub.3)OH or CH.sub.2 CH(C.sub.2 H.sub.5)OH, 5-25 weight % of N-methyl-2-pyrrolidone and the balance, to 100%, water.

Abstract: High impact thermoplastic polyblend compositions prepared by polymerizing vinylaromatic and/or vinyl nitrile monomers in the presence of rubbery substrates of fully hydrogenated 1,2-polymerized butadiene and copolymers thereof. The products exhibit surprisingly high impact and tensile properties despite a very low content of graft polymer.