Abstract: There is provided a process for preparing polyelectrolytes by a water-in-oil emulsion process. A water-in-oil azeotropic emulsion is heated with agitation and a concentrated aqueous solution of small amounts of a polymerization initiator and gel inhibitor and at least one water-soluble vinyl monomer adapted to polymerize at reflux temperature with a concomitant loss of water by azeotropic distillation is added thereto to polymerize said water-soluble monomer.The polymerized product including a gel inhibitor forms a gel-free aqueous solution.

Abstract: A graft copolymer is provided which is characterized by excellent gas impermeability, transparency and impact strength, as well as good flowability, and hence good molding workability, by copolymerizing an olefinically unsaturated nitrile with an alkyl vinyl ether in the presence of a rubbery polymer, which contains at least 50% by weight of a conjugated diene; said olefinically unsaturated nitrile being present in an amount of from 60 to 95% by weight, based on the total weight of said olefinically unsaturated nitrile and said alkyl vinyl ether; and wherein said olefinically unsaturated nitrile and said alkyl ether are present in an amount of from 3 to 50 times by weight the quantity of said rubbery polymer.

Abstract: Polymers are prepared by reacting a particular class of monomer with a curing agent selected from the group consisting of hydrogen peroxide, organic peroxides, and organic hydroperoxides. The monomers are characterized by the general formula: ##EQU1## wherein x is an integer from 0 to 3; y is an integer from O to x; and R.sub.1 and R.sub.2 are selected from the group consisting of acryloyloxy and lower alkyl acryloyloxy; R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, and R.sub.8 are selected from the group consisting of hydrogen and lower alkyl; R.sub.9 and R.sub.10 are selected from the group consisting of hydrogen, lower alkyl, lower hydroxyalkyl, lower hydroxyalkyl acryloyloxy, and lower hydroxyalkyl methacryloyloxy; and R.sub.11 is a lower alkylene group linking two nitrogen atoms.The invention also provides a two-component sealant system which includes a second component comprising a curing agent dissolved in a volatile solvent.

Abstract: Stable emulsions of terpolymer particles are formed by polymerizing ethylene, a styrenic monomer such as styrene, and an alkyl vinyl monomer having from about 3 up to about 24 carbon atoms in an aqueous medium in the presence of a water soluble persulfate initiator, and a nonionic and/or anionic emulsifier. The resulting novel stable emulsions contain particles of terpolymer of the three monomers which will provide film coatings of increased flexibility and toughness. Furthermore, the emulsions have excellent compatibility when blended with conventional polish formulations.

Abstract: An improved process for emulsion polymerization by using as the initiator and the surfactant an oxazoline corresponding to the formula: ##EQU1## where R is an alkyl group of 1-19 carbons, and R.sup.1 and R.sup.2 are methyl, ethyl, hydroxymethyl, or the group RCH.sub.2 COOCH.sub.2 -.

Abstract: Compounds containing a lipophilic radical, a polyethyleneoxy group and an ethylenically unsaturated radical are disclosed. The compounds are useful as nonionic monomeric emulsion stabilizers.

Abstract: Polymerization of vinyl chloride in aqueous suspension in the presence of free-radical initiators of short half-life at pH's below 8. The temperature of the reactor wall must not be more than 20.degree.C above the temperature of the polymerization mixture during the heat-up phase and it must be lower than the temperature of the polymerization mixture during the subsequent polymerization phase. This procedure suppresses the formation of incrustations in the reactor.

Abstract: Antioxidants such as 3,5-di tert.butyl-4-hydroxyphenyl acrylate and 3,5-di tert.butyl-4-hydroxyphenyl methacrylate, age resistant polymers having age resistors physically combined therewith and age resistant polymeric compositions prepared by emulsion free radical polymerization techniques involving the use of said age resistors as monomers.

Abstract: A tetrafluoroethylene polymer or copolymer suitable e.g. for extrusion on to wire to give an insulated conductor is produced using a dual catalyst system. The first catalyst component is a catalyst giving a high molecular weight (low SSG) such as ammonium persulphate (APS). The second component is a dibasic acid peroxide e.g. disuccinic acid peroxide (DSAP) which is added after the polymerisation has reached 20% conversion. The latter catalyst is found to produce a copolymer powder which can be extruded on to wire to give faultfree coating.