Abstract: A process for producing organic peroxide initiators useful in the polymerization of ethylenically unsaturated monomers. The process for making the organic peroxides includes forming an aqueous emulsion of the organic peroxide. The organic peroxide is dispersed as small droplets of from 1 to 10 microns in size in the aqueous emulsion. The organic peroxide may be added to a polymerization reactor containing an ethylenically unsaturated monomer. The organic peroxide functions as a free radical initiator to polymerize the monomer. The organic peroxide may be substantially free of organic solvents and plasticizers. The resulting polymers are of high quality.

Abstract: A process for producing organic peroxide initiators useful in the polymerization of ethylenically unsaturated monomers. The process for making the organic peroxides includes forming an aqueous emulsion of the organic peroxide. The organic peroxide is dispersed as small droplets of from 1 to 10 microns in size in the aqueous emulsion. The organic peroxide may be added to a polymerization reactor containing an ethylenically unsaturated monomer. The organic peroxide functions as a free radical initiator to polymerize the monomer. The organic peroxide may be substantially free of organic solvents and plasticizers. The resulting polymers are of high quality.

Abstract: A process for producing organic peroxide initiators useful in the polymerization of ethylenically unsaturated monomers. The process for making the organic peroxides includes forming an aqueous emulsion of the organic peroxide. The organic peroxide is dispersed as small droplets of from 1 to 10 microns in size in the aqueous emulsion. The organic peroxide may be added to a polymerization reactor containing an ethylenically unsaturated monomer. The organic peroxide functions as a free radical initiator to polymerize the monomer. The organic peroxide may be substantially free of organic solvents and plasticizers. The resulting polymers are of high quality.

Abstract: The present invention to a method of synthesizing poly(vinyl halide) by means of a free radical polymerization which mimics a "living" radical polymerization in the presence of an iodine containing chain transfer agent containing at least one iodine atom bonded to a primary carbon atom and having the formula:R--CH.sub.2 I (I)R--CHX I (II),R--CH(X)--CH.sub.2 I (III),R--CH(X)--CHX I (IV), orR--CH(X)--CH.sub.2 --CHX I (V),wherein X is fluorine, chlorine, bromine, or iodine, R is hydrogen, C.sub.1, C.sub.2, C.sub.3, C.sub.4, C.sub.5 alkyl, any of which are linear or branched, cyanoalkyl, cyclohexyl, methyl cyclohexyl, phenyl, benzyl, and halogenated or oxygenated derivatives thereof.In accordance with the invention there is further provided a method of synthesizing 1-halo-1-iodoethane by reacting hydrogen iodide with vinyl chloride or vinyl fluoride in the presence of an iodine generating catalyst under certain specified conditions.

Abstract: The present invention relates to a method of synthesizing 1-chloro-1-iodoethane by reacting hydrogen iodide with vinyl chloride monomer in the presence of an iodine containing catalyst under certain specified conditions. The resulting product of the reaction is a high yield, high purity 1-chloro-1-iodoethane which is useful as a chain transfer agent in the polymerization of vinyl chloride monomer. The 1-chloro-1-iodoethane formed by the instant invention can be made separately in a conventional synthesis apparatus or the compound can be synthesized in situ in the reaction vessel used for polymerization of vinyl chloride.

Abstract: Rigid thermoplastic articles are disclosed which have reduced surface gloss. The reduced gloss is achieved by the use of a mixture of polymers having different viscoelastic properties. The preferred embodiment is a mixture of PVC and crosslinked PVC.

Abstract: The present invention relates to a method of synthesizing 1-chloro-1-iodoethane by reacting hydrogen iodide with vinyl chloride monomer in the presence of an iodine containing catalyst under certain specified conditions. The resulting product of the reaction is a high yield, high purity 1-chloro-1-iodoethane. This 1-chloro-1-iodoethane is useful as a chain transfer agent in the polymerization of vinyl chloride monomer in a process which mimics a pseudo-living radical polymerization.

Abstract: Optically transparent frosted polymeric articles are disclosed which can be produced in smooth molds. Polymeric articles, such as PVC bottles, are molded from a composition having two polymers with different viscoelastic properties. A particularly desirable composition is one containing both PVC and crosslinked PVC.

Abstract: Rigid thermoplastic articles are disclosed which have reduced surface gloss. The reduced gloss is achieved by the use of a mixture of polymers having different viscoelastic properties. The preferred embodiment is a mixture of PVC and crosslinked PVC.

Abstract: Products formed from crosslinked vinyl resins and a plasticizer exhibit a low degree of marring after contacting polymeric substrates or substrates coated with a polymeric layer.

Abstract: Porous particles of crosslinked PVC are disclosed. The particles are skinless and have a fast powder mix time. Processes to produce the novel particles are also disclosed.

Abstract: Porous particles of crosslinked PVC are disclosed. The particles are skinless and have a fast powder mix time. Processes to produce the novel particles are also disclosed.

Abstract: Porous particles of crosslinked PVC are disclosed. The particles are skinless and have a fast powder mix time. Processes to produce the novel particles are also disclosed.

Abstract: Porous particles of crosslinked PVC are disclosed. The particles are skinless and have a fast powder mix time. Processes to produce the novel particles are also disclosed.

Abstract: Porous particles of crosslinked PVC are disclosed. The particles are skinless and have a fast powder mix time. Processes to produce the novel particles are also disclosed.

Abstract: Porous particles of crosslinked PVC are disclosed. the particles are skinless and have a fast powder mix time. Processes to produce the novel particles are also disclosed.

Abstract: Process for the polymerization of vinyl chloride in aqueous suspension or microsuspension using an organo-soluble free-radical-yielding initiator wherein the initiator is progressively activated during polymerization by the progressive reduction of a non-initiator-activating water-soluble metal chelate complex to an initiator-activating form of the complex (which is otherwise substantially stable under the polymerization conditions) in which the metal is in a lower oxidation state, preferably a one- or two lower oxidation state.

Abstract: A process for the dimerization of acrylonitrile to predominantly straight-chain C.sub.6 dimers, in which the acrylonitrile is dissolved in an organic solvent capable of donating protons, the acrylonitrile and solvent being substantially dry, and the solution contacted with a catalyst comprising a phosphorus (III) compound of general formula: ##STR1## where Ar is an aromatic nucleus and where groups X, which may be the same or different, are electron-donating substituents of the aromatic nucleus which give rise to a negative Hammett .sigma. constant, and R represents a hydrocarbyl group, the acrylonitrile and solvent being contacted with a low-cost scavenging reagent for a predetermined period of time before being contacted with the aforementioned catalyst.

Abstract: Novel phosphinites and phosphonites of general formula: ##STR1## where R.sub.2 is an electron-donating substituent, R.sub.1 and R.sub.3 are electron-donating substituents or hydrogen atoms, provided that they are not both hydrogen atoms, or either R.sub.1 or R.sub.3 forms part of a fused alicyclic ring with R.sub.2, R is alkyl or cycloalkyl, and n and m are integers, each being either 1 or 2, provided that (m+n) equals 3, and when n is 2, the substituents on each aromatic ring may be the same or different, and their use as catalysts for the dimerisation of acrylonitrile to give predominantly straight-chain C.sub.6 dimers.