摘要:
A reaction solution comprising a mixture of tricyclopentadiene, a norbornene monomer with at least 3 rings in its backbone, a 5-alkenyl-2-norbornene pot life adjusting agent along with a molybdenum type catalyst system gives prolonged pot life without extending time to exotherm (e.g., smoking time). By utilizing this reaction solution it is possible to bulk polymerize reinforced or unreinforced articles in a mold via ring-opening polymerization. Articles so obtained have good outward appearance and excellent physical properties.
摘要:
Process for production of a molded article comprising polymerizing a norbornene monomer having bicyclic or higher cyclic structure in the presence of a metathesis catalyst system and a viscosity modifier having room temperature viscosity of 300 to 50,000 cps which viscosity modifier comprises a ring-opened polymer and unreacted norbornene monomer having bicyclic or higher cyclic structure.
摘要:
A reinforced polymeric matrix comprising a glass mat and a norbornene polymer surrounding the glass mat, the glass mat is composed of at least one glass fiber treated with a silane coupling agent and a binder adhering the glass fiber(s) to the norbornene polymer; the binder is selected from polyolefins, vinyl aromatic polymers, and ring-opened polymers of at least one norbornene-type monomer containing at least one norbornene group. Process for making a reinforced polymeric matrix comprises positioning a glass mat within a mold, the glass mat having been treated with a hydrocarbon polymer binder; mixing a plurality of streams, one stream containing a catalyst of a metathesis catalyst system, another stream containing a cocatalyst of a metathesis system, and at least one of the streams containing at least one norbornene-type monomer which is liquid at room temperature to form a mixed stream; introducing the mixed stream into the mold around the mat; polymerizing by ring opening the monomer(s) in the mold; and extracting from the mold the reinforced polymeric matrix, wherein the norbornene polymer is thermoset.
摘要:
The invention herein is directed to article and process for making it. The article is characterized by a substrate composed of a ring-opened polymer of a norbornene-type monomer having tricyclic or higher cyclic structure and a polymer sheet tenaciously adhering to the substrate. The process includes the steps of positioning the polymer sheet in a mold, flowing the monomer in a liquid state in a plurality of streams into the mold, polymerizing the monomer in the mold by ring-opening of the monomer, and removing the article from the mold with the polymer sheet on at least one outer surface thereof.
摘要:
Process for preparing a pore-free polynorbornene product by bulk polymerizing a monomer charge containing at least one norbornene monomer having tricyclic or higher cyclic structure with a metathesis catalyst by controlling maximum exotherm temperature to a level of 160.degree. C. or below or by controlling the temperature difference to 80.degree. C. or below between the inner and exterior temperatures during the cooling period of said product from the maximum exotherm to the glass transition temperature of said product.
摘要:
Product comprising a ring-opened base polymer of at least one norbornene-type monomer and a thin polymer film on at least a portion of said base polymer of a vinylidene chloride polymer or an unsaturated nitrile polymer whereby the product has improved weatherability and reduced odor. The method of making the product is characterized by applying the polymer film from an organic solution of a vinylidene chloride resin or an unsaturated nitrile resin and then drying the coating to remove the organic solvent.
摘要:
Described herein is an oily, transparent reaction product which is prepared by heat treating at 110.degree.-220.degree. C. a dicyclopentadiene and a vinyl aromatic compound. This reaction product can be polymerized by ring-opening in presence or absence of a norbornene monomer to produce a thermoset polymer. Freezing point of the reaction product is below 10.degree. C.
摘要:
A product is disclosed which comprises a ring-opened base polymer of at least one norbornene-type monomer and a thin polymer film on at least a portion of said base polymer of a vinylidene chloride polymer or an unsaturated nitrile polymer whereby the product has improved weatherability and reduced odor. The method of making the product is characterized by applying the polymer film from an organic solution of a vinylidene chloride resin or an unsaturated nitrile resin and then drying the coating to remove the organic solvent.
摘要:
A thermosetting resin of a norbornene monomer is prepared by bulk-polymerizing a norbornene monomer in a mold in the presence of a metathesis catalyst system and further in the presence of a dicyclopentadiene heat-polymerized resin in an amount of 15 to 150 parts by weight per 100 parts by weight of the monomer.
摘要:
A heat-curable epoxy resin composition comprising (A) an epoxy resin and (B) an acid anhydride curing agent liquid at 20.degree. C. composed of, based on acid anhydride equivalents, of 10 to 70% of a tetrabasic acid anhydride represented by the following formula ##STR1## wherein R.sub.1 represents hydrogen or a methyl group, andR.sub.2 represents hydrogen or a lower alkyl group,and 30 to 90% of a liquid alicyclic dibasic acid anhydride.