Abstract: Ethylene is homopolymerized or copolymerized with another olefin monomer in the presence of a catalyst system comprising organo metal cocatalyst and a titanium-containing catalyst component, said titanium-containing catalyst component being obtained by reacting together a porous particulate material, an organic magnesium compound, a halogen or interhalogen compound and titanium tetrachloride.

Abstract: Ethylene is homopolymerized or copolymerized with another olefin monomer in the presence of a catalyst system comprising organo metal cocatalyst and a titanium-containing catalyst component, such titanium-containing catalyst component being obtained by reacting together a porous particulate material, an organo magnesium compound, a halogen or interhalogen compound and titanium tetrachloride.

Abstract: Thin films of about 1 to 5 mil thick of poly(parabanic acid) (PPA-M form) containing halogenated flame retardants have the flame retardancy enhanced by the addition of small amounts (generally about 0.1 to 3.0 weight percent) of a copper chelate compound.

Abstract: Normally intractable polymers of the structure: ##STR1## wherein X is O or NH, provided at least one X is O, R is an organic moiety, such as poly(parabanic acids) are plasticized by composition with from 15 to 60 weight percent of an aromatic sulfone or aromatic sulfoxide such as diphenyl sulfone, diphenyl sulfoxide or dibutyl-4,4'-sulfonyl dibenzoate.

Abstract: Highly useful novel microcellular polymeric structures, especially films and fibers, are prepared from certain solid polymers. Aromatic polysulfones, polyimides, polyhydantoins, polyamides and polyparabanic acid are the preferred ones for the novel structures of the invention.

Abstract: Highly useful novel microcellular polymeric structures, especially films and fibers, are prepared from certain solid polymers. Aromatic polysulfones, polyimides, polyhydantoins, polyamides and polyparabanic acid are the preferred ones for the novel structures of the invention.

Abstract: Polybenzyls of high molecular weight and high crystallinity are obtained by polymerizing aralkyl halides in the presence of a catalyst comprising a complex of a Friedel-Crafts catalyst with a complexing agent which can be a nitroarene or a nitroalkane. The complex catalyst allows the polymerization to be run at higher temperatures and with higher rates. Yields are obtained up to 100%.

Abstract: Copper chelates of 2-hydroxybenzophenones useful as UV light absorbers are employed to stabilize organic compositions such as polymer compositions against degradation on embrittlement on exposure to UV light.

Abstract: Flexible circuit articles comprising microcellular film such as films from polyparabanic acid having a conductive circuit adhered to said film.

Abstract: Highly unusual and useful novel high-performance, oriented, low-crystalline, essentially heterocyclic structures, e.g. films, are prepared from certain novel and important process sequences. These structures, e.g. films and fibers, possess a unique combination of minimal shrinkage at high temperatures, after orientation, coupled with negligible coefficient of expansion over an unusually wide temperature range.

Abstract: Novel high impact plastics are prepared by the inclusion of 2 to 30 weight percent of bromobutyl rubber in polymers of styrene and styrene-acrylonitrile and the grafting of said polymers onto said rubber. The graft copolymers are obtained by polymerizing the monomers of styrene or styrene-acrylonitrile in the presence of the bromobutyl rubber, which is preferably precrosslinked.

Abstract: High temperature resistant polymers containing a methylene monoarylene, methylene diarylene, -aromatic ring--CH.sub.2 -- or -aromatic ring--CH.sub.2 --aromatic ring-group are made more effective at even higher temperatures against thermal oxidative degradation by incorporating small quantities of special antioxidant stabilizers therein either singly or in combination to result in novel and unobvious compositions.

Abstract: A nonwoven mat of polyolefin fiber is contacted with a gaseous sulfur dioxide-chlorine mixture to sulfo-chlorinate the surface of the polyolefin fibers to a relatively high sulfur content and then preferably treated with an amine, either after compacting the mat or before compacting the mat to form a structure suitable as a battery separator. The mat can be used for other structures besides battery separators. And it can be separated into individually wettable staple fibers before compaction, i.e. individual separate fibers which are wettable.

Abstract: Novel high impact plastics are prepared by the inclusion of 2 to 30 weight percent of chlorobutyl rubber in polymers of styrene and styrene-acrylonitrile and the grafting of said polymers onto said rubber. The graft copolymers are obtained by polymerizing the monomers of styrene or styrene-acrylonitrile in the presence of the chlorobutyl rubber, which is preferably precrosslinked.

Abstract: Highly unusual and useful novel high-performance, oriented, lowcrystalline, essentially heterocyclic structures, e.g. films, are prepared from certain novel and important process sequences. These structures, e.g. films and fibers, possess a unique combination of minimal shrinkage at high temperatures, after orientation, coupled with negligible coefficent of expansion over an unusually wide temperature range.