Exxon Research and Engineering Company

Burnett H Johnson

Terrence Huff

Don J Henderson

Robert W Lenz

John E Chandler

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.

Polymerization catalyst

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.

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.

Poly(parabanic acid) films having improved flammability resistance by

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.

Polymers characterized by 1,3-imidazolidine-1,3-diyl rings plasticized

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.

Method for producing an essentially gas and liquid impermeable low

Microcellular heterocyclic polymer structures

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%.

Preparation of linear crystalline homopolybenzyl

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.

Stabilized polymer compositions

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

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.

Method of making an oriental dimensionally stable article from a high

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.

Bromobutyl rubber-styrene-acrylonitrile graft copolymers

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.

Stabilization of high temperature plastics containing aryl-methylene

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.

Wettable non-woven structures and components thereof

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.

Chlorobutyl rubber-styrene-acrylonitrile graft copolymers

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.

Growing community of inventors

Baytown, TX, United States of America

Burnett H Johnson