The B. F. Goodrich Company

Pti/end/corr

Paul T Stricharczuk

George M Benedikt

Linwood P Tenney

Parley C Lane, Jr

Dennis J Janda

Robert J Minchak

Dennis L Lawson

Charles S Woodson

Timothy J Kettering

Geoffrey A Lindsay

Glen R Gribble, Jr

Solution and RIM polymerization of cycloolefins containing at least one norbornene moiety is carried out in the presence of a methathesis catalyst system and an activator, particularly a chlorosilane activator, to obtain faster reaction with higher conversions at lower mold temperatures. The methathesis catalyst system includes an organoammonium molybdate or tungstate catalyst and an alkylaluminum or an alkylaluminum halide cocatalyst. The chlorosilane activator is used at a level of 0.05 to 10 millimoles per mole of the cycloolefin monomers. The polymers of cycloolefins can be impact modified and/or flame-retarded.

Modified polycycloolefins

A process for increasing the molecular weight of cycloolefin monomers is provided by this invention which can be incorporated into ring-opening polymerization methods. This method is particularly suited for bulk polymerization processes but can also be used for solution polymerization processes. By increasing the molecular weight of the cycloolefin monomers, polymers having higher glass transition temperatures are obtained.

Method for preparing cycloolefin copolymers with improved heat stability

A molded, one piece electrolytic cell head is provided which is obtained from a closed mold. The structure weighs more than 100 pounds and is comprised of bulk polymerized monomers having norbornene functionality. The structure provides improved performance over cell heads comprised of fiber glass reinforced polyester since fiber reinforcement is not required.

Electrolytic cell heads comprised of bulk polymerized cycloolefin

Methods of preparing storage stable components useful for metathesis bulk polymerization of cycloolefin monomers are provided. These components contain cycloolefins with norbornene-functional groups and cocatalysts activated with a halometal compound. In these methods, the cocatalyst is completely formed before the halometal activator is added to prevent the formation of unwanted hydrogen halides, which catalyze undesired crosslinking reactions which destabilize the cocatalyst component. Bulk polymerization systems are provided wherein these storage stable cocatalyst components are paired with catalyst components that together form the complete metathesis catalyst system. For some embodiments, storage stability is aided by the removal of water.

Storage stable components of reactive formulations for bulk

Liquid dicyclopentadiene feedstocks are provided for bulk polymerization by the addition of reactive norbornene function containing cycloolefin monomers to solid, high purity dicyclopentadiene compositions. These liquid dicyclopentadiene feedstocks provide a high degree of conversion to polymer under bulk polymerization conditions.

Liquid dicyclopentadiene feedstock for bulk polymerization

The present invention relates to a stereo reticulated lace-like structure formed from a mixture of polymeric materials, which structure is formed by extruding a film of the polymeric mixture and simultaneously imparting a cellular or reticulate structure to said film by means of a blowing agent. The resultant stereo reticulated structure has the appearance of overlapping layers of fibers or fibrils with small interstices therebetween even though the structure is formed from a continuous film.

Stereo reticulated polymeric lace-like structure and process for making

Polymer blends of (1) high molecular weight ethylene-propylene (EP) copolymers having a high methylene run index with (2) low density polyethylenes are prepared by physically mixing the polymer components under conditions of heat and shear. The resultant blends are thermoplastic in nature and readily moldable and remoldable. The blends exhibit exceptionally high tensile strength without the use of curing or crosslinking agents. Products made from the polymer blends include liners and molded products such as tubing, toys, and household and automotive items.

Thermoplastic polymer blends of ethylene-propylene (EP) copolymer with

EP or EPDM polymers having a high ethylene content and a high ratio of ethylene units in runs of three or more to isolated ethylene units in the polymer are physically blended with crystalline polypropylene. The blends exhibit good tensile strength and modulus, and are useful to prepare molded products, tubing, liners, and like products.

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Twinsburg, OH, United States of America

Paul T Stricharczuk