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| Number | Title | Issue Date |
| 5543516 | Process for preparation of benzoxazine compounds in solventless systems A method for preparing a desired benzoxazine compound comprises preparing a substantially homogeneous reaction mixture that includes a phenolic compound; a primary amine; and an aldehyde, but no solvent other than for the solvency which the reactants may ... | 08/06/1996 |
| 5491200 | Polycaprolactam molecular composites Polyimides serve as reinforcing rigid-backbone segments in nylon 6 copolymers. In a first embodiment, the copolymers are prepared from polyimides containing acylated caprolactam moieties pendant therefrom which provide sites for polycaprolactam grafts. In... | 02/13/1996 |
| 5437929 | Germanium phthalocyanine films A process for preparing film structures comprising phthalocyanine oligomers having metal coordinating atoms in adjacent rings connected along a central axis through oxygen atoms. The ligands on the outermost rings of the structures are hydrophilic. The pr... | 08/01/1995 |
| 5436280 | Bi(phosphine) photoinitiators and chain transfer agents Vinyl monomers are polymerized in the presence of bi(phosphine oxides) and bi(phosphine sulfides) which can function as photoinitiators and chain transfer agents in the polymerization of vinyl monomers. The incorporation of such organo-phosphorous compoun... | 07/25/1995 |
| 5378420 | Process for preparing aromatic polyimide fibers A process for preparing polyimide fibers involves the preparation of a polymer in p-chlorophenol from reactants comprising 2,2'-dimethyl-4,4'-diaminobiphenyl and a tetracarboxylic anhydride. Following its preparation, the polyimide fibers can be spun dire... | 01/03/1995 |
| 5347041 | Molecular composites Monomers containing two diacetylene segments each of which is connected on one end through a spacer segment to a central mesogen segment, and on the other end to an additional spacer segment, are topochemically polymerized in a molecularly ordered phase t... | 09/13/1994 |
| 5294461 | Pultrusion process for preparing composites An improved pultrusion process for preparing composites comprises combining polymer precursors in a mixer and continuously introducing the resulting mixture, together with reinforcing fibers, into an impregnation chamber maintained under conditions such t... | 03/15/1994 |
| 5283114 | Wholly aromatic polyester fiber-reinforced polystyrene-poly(phenylene oxide) blend Self-reinforced polymer composites of about 98-2% by weight of a mixture of polystyrene and poly(phenylene oxide) and about 2%-98% by weight of a melt processable wholly aromatic polyester which exhibit anisotropic properties in the melt phase. This wholl... | 02/01/1994 |
| 5280183 | Microelectronic device employing multiring phthalocyanine compound Compounds are disclosed which comprise parallel, multiring, porphyrin-related compounds, particularly two-ring phthalocyanine compounds, which have a coordinating atom, either a metal or a metalloid, located at their center. The coordinating atoms in adja... | 01/18/1994 |
| 5275877 | Self reinforced thermoplastic composite laminate A shaped reinforced thermoplastic composite, such as composite laminate (10 or 10A), comprises a thermoplastic matrix polymer (22) and a plurality of fibers (20) of a liquid crystal polymer (LCP) which are formed in situ in the matrix polymer. This compos... | 01/04/1994 |
| 5266695 | Composite densification with benzoxazines The compounds are of the class of multi-functional benzoxazine compounds, useful in forming carbon-carbon composites by means of the pyrolysis of carbon fibers impregnated with such compounds.... | 11/30/1993 |
| 5264524 | Gas-impermeable polyurea polymer systems Block copolymers possessing good gas impermeability, solvent resistance, and physical properties are prepared by forming a prepolymer through the reaction of a diisocyanate compound with a diamine compound, and thereafter reacting the prepolymer with an a... | 11/23/1993 |
| 5264491 | Compatibilization of polymer blends Compatibilizing agents suitable for blending otherwise immiscible polymers comprise a block or graft copolymer in which at least one of the block segments is formed by a living anionic polymerization and thereafter chemically converted to provide a polyme... | 11/23/1993 |
| 5241044 | Soluble poly(p-phenylene)s A process for preparing poly(p-phenylene)s comprises reacting dihydroxy aromatic compounds such as orthoquinone and bisphenols with halogen-substituted aliphatic sulfonic acids, halogen sulfonic acid, or their anhydrides. The monomers thus formed are subs... | 08/31/1993 |
| 5238992 | Microemulsion polymer blends A process for preparing solid polymer blends and composites of controlled porosity in microemulsions containing both hydrophilic and hydrophobic phases. The microemulsions are prepared with surfactant systems that may include a cosolvent as a part thereof... | 08/24/1993 |
| 5191047 | Enamine ketone and enonesulfide polymer systems Enamine ketone and enonesulfide polymeric solids are prepared by reacting liquid or low-melting propynone terminated enamine ketone and enonesulfide prepolymers in one-step, or more preferably, in two-step processes. Properties of the resulting polymers a... | 03/02/1993 |
| 5169914 | Uniform molecular weight polymers A method for producing polymers with narrow molecular weight distribution which involves combining (1) an initiator component of the formula ##STR1## in which R1, R2, and R3 are alkyl, aryl, or aralkyl groups, and can... | 12/08/1992 |
| 5152939 | Composite densification with benzoxazines A method for forming carbon-carbon composites consists of impregnating structures with carbon-forming precursor compounds comprising multi-functional benzoxazine compounds. The impregnated structures are pyrolyzed to form carbonaceous char which serves to... | 10/06/1992 |
