Abstract: A multilayer composite pipe structure is described. The multilayer composite pipe comprises a hollow inner conduit, a first layer of adhesive, a metallic intermediate layer, a second layer of adhesive, as well as, the outer thermoplastic layer, respectively. The hollow inner conduit is made from any rigid thermoplastic material. The outer thermoplastic layer is made from a rigid, amorphous thermoplastic polymer. This multilayer composite pipe is pressure bearing. In one embodiment, the multilayer composite pipe is solvent cementable; whereas in another embodiment, the multilayer composite pipe is heat fusible. In still yet another embodiment of the invention, the multilayer composite pipe is bendable. Furthermore, the multilayer composite pipe can be used in a fluid conduit system with fittings with an optional insert.

Abstract: A method of preparing generally amorphous copolymers of ethylene and at least one norbornene (NB)-type comonomer. These polymers may be random or alternating, depending on the choice of catalyst and/or the relative ratio of the monomers used. This method comprises polymerizing said monomers in a diluent or in bulk in the presence of a cationic palladium catalyst resulting from reacting a chelating ligand with a palladium (II) compound. The catalysts employed in this invention may be represented by the formula: wherein X and Y each independently is a donor heteroatom selected from P, N, O, S and As or an organic group containing said heteroatoms, and the heteroatoms are bonded to the bridging group A; A is a divalent group selected from an organic group and phosphorus forming together with X, Y and Pd a 4, 5, 6, or 7-membered ring, and preferably a 5-membered ring; R is a hydrocarbyl group; and CA is a weakly coordinating anion.

Abstract: The invention is directed to polymers containing a repeating unit derived from a norbornene sulfonamide. These may be addition polymers which include copolymers with one or more comonomers such as norbornene, ethylene, an acrylate or sulfur dioxide or carbon monoxide. Said monomers may be polymerized using single or multicomponent Group VIII catalysts. The norbornene sulfonamides can also form ROMP polymers using known metathesis catalysts. Preferably the ROMP polymers may be hydrogenated to give more stable polymers.

Abstract: A method of preparing amorphous copolymers of ethylene and at least one norbornene (NB)-type comonomer is disclosed. These polymers may be random or alternating depending on the choice of catalyst and/or the relative ratio of the monomers used. This method comprises polymerizing said monomers in a diluent or in bulk in the presence of a neutral nickel catalyst which may be represented by the formula ##STR1## wherein Y may be a saturated or unsaturated hydrocarbyl chain, X may be oxygen or sulfur, E may be phosphorus, arsenic, antimony, oxygen or nitrogen, R and R' independently each is hydrogen or a hydrocarbyl group, L is a ligand containing a heteroatom P, N or O or L and R together with L may form part of a chelating structure in which case L is an ethylenic double bond.

Abstract: A continuous process for the solution polymerization of appropriate polycycloolefins in a ROMP zone to obtain a processable ROMP homo- or copolymer in solution, and subsequent hydrogenation of the ROMP (co)polymer without removing the residual ROMP catalyst and co-catalyst, provides an optical product having a mol wt M.sub.w in the range from 50,000-300,000 and polydispersity M.sub.w /M.sub.n in the range from 1.3-5.0, more preferably from 1.3-3, the lower the polydispersity the more desirable the physical properties of the (co)polymer.

Abstract: An insulin-containing polymer composition intended for the oral administration of insulin, which comprises a hydrophilic polymer modified with an inhibitor of proteolytic enzyme, insulin and water, wherein the inhibitor of proteolytic enzymes is ovomucoid isolated from duck or turkey egg whites.

Abstract: The invention discloses methods of preparing copolymers from norbornene-type monomers and cationically polymerizable monomers or polymers from catalytically polymerizable monomers by employing Group VIII transition metal ion source in a solvent for said monomers at a temperature in the range from -100.degree. C. to 120.degree. C. Also disclosed are copolymers from norbornene-type monomers and catalytically polymerizable monomers.

Abstract: Acrylate monomers such as methyl methacrylate, or other suitable monomers such as lactams, lactones, or acrylamides, are polymerized by reaction injection molding (RIM) utilizing a combination of organo group-4 catalysts, e.g., a neutral organo catalyst and a cationic organo catalyst. Preferably a Lewis acid is utilized which reacts with the neutral organo catalyst and forms in situ the cationic organo catalyst. Significant exotherms are rapidly generated and result in short cure times and typically in high conversions of at least 95 percent by weight of the monomer. The catalysts of the present invention give good control of tacticity and thus high Tg polymers such as syndiotactic methyl methacrylate can be produced.

Abstract: A single component ionic catalyst consists essentially of an organonickel complex cation, and a weakly coordinating neutral counteranion. The cation is a neutral bidentate ligand removably attached to a Group VIII transition metal in an organometal complex. The ligand is easily displaced by a norbornene-type (NB-type) monomer in an insertion reaction which results in an unexpectedly facile addition polymerization. A NB-type monomer includes NB or substituted NB, or a multi-ringed cycloolefin having more than three rings in which one or more of the rings has a structure derived from NB, and a ring may have an alicyclic alkyl, alkylene or alkylidene substituent. The insertion reaction results in the formation of a unique propagating species more soluble in a polar than in a non-polar solvent and devoid of an available .beta.-hydrogen for termination. The ensuing propagation of a polymer chain proceeds without measurable unsaturation.

Abstract: A continuous process for the solution polymerization of appropriate polycycloolefins in a ROMP zone to obtain a processable ROMP homo- or copolymer in solution, and subsequent hydrogenation of the ROMP (co)polymer without removing the residual ROMP catalyst and co-catalyst, provides an optical product having a mol wt M.sub.w in the range from 50,000-300,000 and polydispersity M.sub.w /M.sub.n in the range from 1.3-5.0, more preferably from 1.3-3, the lower the polydispersity the more desirable the physical properties of the (co)polymer.

Abstract: A process is provided for forming an electrically conductive polymer of a pyrrole monomer, optionally substituted at the 3- and 4- positions. The process comprises dispersing a polymerization initiator selected from the group consisting of anhydrous halides of iron, cobalt or nickel (Group VIII metal) in an anhydrous liquid reaction medium and, adding essentially pure pyrrole monomer, or a solution of the monomer in the liquid at a temperature in the range from about -20.degree. C. to below about the boiling point of the solution. The pyrrole polymer so formed is a Group VIII metal halide counterion, and a conductor having a conductivity in the range from about 1 to about 150 ohm.sup.-1 cm.sup.-1 ("S/cm" for brevity), or a semiconductor having a conductivity in the range from about 10.sup.-3 to about 1 S/cm, depending upon the particular structure of the monomer, the ratio of the initiator to pyrrole monomer, and the molecular weight of the polymer formed.

Abstract: Particles of a fine powder of a thermoplastic synthetic resin (host powder) having a suitable broad range between its initial glass transition temperature (initial T.sub.g) and its final T.sub.g, are partially coated with an anti-caking coating powder (coating powder) by blending at an elevated temperature to form "mottled" particles. The elevated temperature is defined in relation to the initial and final T.sub.g s as: (initial T.sub.g -20).degree. C. but below the final T.sub.g. Mottled particles, without being encapsulated, have the unique ability to maintain their individual particulate characteristics at a temperature at least 10.degree. C. above the initial T.sub.g of the uncoated host powder, and flow freely under applied pressure. Such pressure is applied by a rolling drum which spreads the mottled particles onto a target bed where they are selectively sintered With a controlled high energy beam, usually a laser beam.

Abstract: Disclosed is a method for decolorizing alkylated diarylamines, which have been made using aluminum chloride catalyst, by mixing and optionally heating the colored diarylamine with clay, then separating the decolorized diarylamine from the clay. Alternatively, the alkylated diarylamines, which have been made using aluminum chloride catalyst, may be decolorized by passing the diarylamines through a filter medium comprising clay.

Abstract: Substantially optically clear molding compositions comprising polymerized cycloolefin monomers (e.g., norbornene-type polymers) which, subsequent to polymerization have been hydrogenated are provided. The polymers have a weight average molecular weight of from about 37-47.times.10.sup.3.

Abstract: A continuous process for making N,N-dimethylacrylamide (NNDMA) is disclosed which uses a commodity chemical, namely vinyl chloride (VCl), which is amidated with dimethylamine (DMA) and carbon monoxide in the presence of a supported palladium(O) triorganophosphine catalyst used under conditions where the ratio of P/Pd is critical. The continous process unexpectedly provides the catalyst with long life because the reaction can be carried out in a moving bed of catalyst in the presence of enough acetonitrile solvent to prevent deposition of DMA.HCl, formed during the reaction, in the pores of the catalyst support.

Abstract: This method teaches how to recover and reuse a powder of a thermally degradable material which is used in a selective laser sintering (SLS) process. To recycle such a laser-sinterable powder successfully in a SLS machine it is protected against degradation by cooling the hot bed while layer-upon-layer (layer-wise) of powder is being sintered, seriatim, to form successive slices fused together to form an article of arbitrary shape (part). The process requires maintaining the powder which has more than 80% of the number of particles <53 .mu.m as a quiescent bed which is nevertheless porous enough to permit flowing a cooling gas downwardly through the bed without disrupting its surface. Since each slice is formed at the surface, and the part, as it is formed, is supported in a well-insulated bed, the powder adjacent the slice is at a much higher temperature than powder in the rest of the bed, which, but for the cooling gas, would get overheated.

Abstract: Alloys of polycycloolefin polymers are produced by dissolving an ethylene-based functional polymer in at least one polycycloolefin monomer and polymerizing the mixture. Various polycycloolefin catalysts can be utilized. Often it is desirable to utilize bulk polymerization including reaction injection molding (RIM), liquid injection molding (LIM), reinforced reaction injection molding (RRIM), resin transfer molding (RTM), and the like. The alloys have improved properties such as impact strength, solvent resistance, as well as improved thermal aging properties such as retention of impact strength.

Abstract: Alloys of polycycloolefin polymers are produced by dissolving an ethylene-based functional polymer in at least one polycycloolefin monomer and polymerizing the mixture. Various polycycloolefin catalysts can be utilized. Often it is desirable to utilize bulk polymerization including reaction injection molding (RIM), liquid injection molding (LIM), reinforced reaction injection molding (RRIM), resin transfer molding (RTM), and the like. The alloys have improved properties such as impact strength, solvent resistance, as well as improved thermal aging properties such as retention of impact strength.

Abstract: The partially fluorinated alkene 4,4,4-trifluoro-2-methyl-1-butene is produced by the selective dehydrochlorination of 3-chloro-1,1,1-trifluoro-3-methylbutane in the presence of a suitable base at elevated temperatures. The alkene is converted to 1,2-epoxy-4,4,4-trifluoro-2-methylbutane which is polymerizable in the presence of an aluminum coordination catalyst. A copolymer can be made with epichlorohydrin.

Abstract: A branched chain polyalkylene polyamine ("PAPA") having plural amine groups, including a secondary amine group intermediate terminal primary amine groups one of which is hindered, and having at least two carbon atoms between each group, is selectively reductively alkylated with a ketone. The reaction provides a convenient method for selectively reductively alkylating a PAPA having a hindered primary amine group, the method comprising contacting the PAPA with hydrogen and the ketone in the presence of a catalytically effective amount of a Group VIII metal on a catalyst support, at a pressure in the range from about 500-1000 psi and a temperature in the range from about 50.degree. C. to about 200.degree. C. for a period of time sufficient to preferentially alkylate the unhindered amine primary terminal amine group. The alkylation proceeds essentially without alkylating either the sterically hindered terminal primary amine group or the intermediate unhindered secondary amine group.