| Patent Number |
Title Of Patent |
Date Issued |
| 6753447 |
Functionalized monomers for synthesis of rubbery polymers |
June 22, 2004 |
| This invention discloses a process for synthesizing an amine functionalized monomer that comprises (1) reacting a secondary amine with a 2,3-dihalopropene to produce a vinyl halide containing secondary amine having a structural formula selected from the group consisting of ##STR1##wh |
| 6203814 |
Method of making functionalized nanotubes |
March 20, 2001 |
| Graphitic nanotubes, which includes tubular fullerenes (commonly called "buckytubes") and fibrils, which are functionalized by chemical substitution or by adsorption of functional moieties. More specifically the invention relates to graphitic nanotubes which are uniformly or non-unif |
| 6174615 |
Composite of polysilamine and strong acid |
January 16, 2001 |
| A composite comprising a polysilamine having a repeating unit represented by the following formulawhereinR.sup.1, R.sup.2 and R.sup.3 are the same or different and each is a hydrogen atom or a lower alkyl group;A.sup.1 is a lower alkylene group which may be substituted by a lower alkyl g |
| 5994560 |
Resolution of racemic mixtures using polymers containing chiral units |
November 30, 1999 |
| Described herein is a novel process to resolve a racemic compound into its optically active isomers without need for chemical transformation such as salt formation. The process advantageously utilizes polymers containing chiral moieties in their repeat units as well as exhibiting critica |
| 5861454 |
Rubber composition containing carbon fibrils and a pneumatic tire |
January 19, 1999 |
| A rubber composition containing carbon fibrils in which 0.5 to 60 parts by weight of carbon fibril material comprised primarily of an aggregate of fibrils having an average particle diameter of 0.05 to 50 microns in which fine, filiform carbon fibrils of 3.5 to 75 nm in diameter are inte |
| 5789132 |
Toner for developing electrostatic images containing fine powder fluidity improver and, one-comp |
August 4, 1998 |
| A toner for developing electrostatic images is comprised of toner particles having a number average particle diameter of from 0.5 .mu.m to 5.0 .mu.m, in which toner particles with a particle diameter of 6.0 .mu.m or larger is included in a proportion of not more than 5% by number. The to |
| 5739383 |
Resolution of racemic mixtures using polymers containing chiral units |
April 14, 1998 |
| Described herein is a novel process to resolve a racemic compound into its optically active isomers without need for chemical transformation such as salt formation. The process advantageously utilizes polymers containing chiral moieties in their repeat units as well as exhibiting critica |
| 5599639 |
Acid-modified polybenzimidazole fuel cell elements |
February 4, 1997 |
| An electrolytic membrane for use in fuel cell includes a fluid-imbibed acidified polybenzimidazole resin. The resin is alkyl or aryl sulfonated or alkyl or aryl phosphonated, preferably with a degree of substitution of from 15 to about 60 per cent. |
| 5478888 |
Preparation process of thermoplastic resin composite |
December 26, 1995 |
| The present invention relates to a process for the preparation of a thermoplastic resin composite comprising conducting polycondensation of a monomer material in a solution of an organic solvent containing an organic solvent soluble polymer to form an aromatic condensation polymer which |
| 5470687 |
Process for producing toner particles using free space formed in a polymeric medium |
November 28, 1995 |
| A toner for developing electrostatic images is comprised of toner particles having a number average particle diameter of from 0.5 .mu.m to 5.0 .mu.m, in which toner particles with a particle diameter of 6.0 .mu.m or larger is included in a proportion of not more than 5% by number. The to |
| 5403675 |
Sulfonated polymers for solid polymer electrolytes |
April 4, 1995 |
| Sulfonated polyphenylene solid polymer electrolytes having high proton conductivity are provided, which are stable and which maintain high conductivity at temperatures of 100.degree. C. and above. These membranes are useful as solid polymer electrolytes for fuel cells and can be oper |
| 5321087 |
Preparation process of thermoplastic resin composite |
June 14, 1994 |
| The present invention relates to a process for the preparation of a thermoplastic resin composite comprising conducting polycondensation of a monomer material in a solution of an organic solvent containing an organic solvent soluble polymer to form an aromatic condensation polymer which |
| 5283283 |
High modulus blend of poly(.alpha.-amino acid) in rubbery elastomer |
February 1, 1994 |
| It is frequently desirable to increase the modulus of rubbers which are utilized in a wide variety of applications. This invention discloses a technique for increasing the modulus of rubbers. By utilizing this technique, high modulus rubber compositions can be attained without sacrif |
| 4996178 |
Low temperature synthesis of condensation polymers |
February 26, 1991 |
| Condensation polymers of high molecular weight, such as polyesters, polyureas, and polyamides, are usually prepared at temperatures of 200.degree. C. or greater. However, by utilizing the catalyst systems of the present invention, condensation polymers can be synthesized at much lowe |
| 4923839 |
Low temperature synthesis of condensation polymers |
May 8, 1990 |
| Condensation polymers of high molecular weight, such as polyesters, polyureas, and polyamides, are usually prepared at temperatures of 200.degree. C. or greater. However, by utilizing the catalyst systems of the present invention, condensation polymers can be synthesized at much lowe |
| 4895922 |
Low temperature synthesis of polyesteramides |
January 23, 1990 |
| This invention disclosed a process for the synthesis of polyesteramides. By utilizing the phosphorus containing catalyst systems of the present invention, such polyesteramides can be synthesized at relatively low temperatures. The present invention specifically discloses a process for |
| 4895817 |
Polycondensation catalyst |
January 23, 1990 |
| Condensation polymers of high molecular weight, such as polyesters, polyureas, and polyamides, are usually prepared at temperatures of 200.degree. C. or greater. However, by utilizing the catalyst system of the present invention condensation polymers can be synthesized at much lower |
| 4873292 |
Antithrombogenic synthetic polymer and process for its preparation |
October 10, 1989 |
| An antithrombogenic synthetic polymer has repeat structural units represented by the following structural formula consisting of portions I and II: ##STR1## a microdomain structure composed of crystalline phases and amorphous phases, each phase having an average size of 5 to 10 nm |
| 4843053 |
Low temperature synthesis of condensation polymers |
June 27, 1989 |
| Condensation polymers of high molecular weight, such as polyesters, polyureas, and polyamides, are usually prepared at temperatures of 200.degree. C. or greater. However, by utilizing the catalyst systems of the present invention, condensation polymers can be synthesized at much lowe |
| 4804730 |
Process for producing an aliphatic polyester by polymerizing dicarboxylic acid and glycol in the |
February 14, 1989 |
| Condensation polymers of high molecular weight, such as polyesters, polyureas, and polyamides, are usually prepared at temperatures of 200.degree. C. or greater. However, by utilizing the catalyst systems of the present invention, condensation polymers can be synthesized at much lowe |
| 4778873 |
Polycondensation catalyst |
October 18, 1988 |
| Condensation polymers of high molecular weight, such as polymers, polyureas, and polyamides, are usually prepared at temperatures of 200.degree. C. or greater. However, by utilizing the catalyst system of the present invention condensation polymers can be synthesized at much lower te |
| 4687831 |
Antithrombogenic synthetic elastomer and process of preparation thereof |
August 18, 1987 |
| Antithrombogenic synthetic elastomer having repeat units comprising portion I which is a soft segment unit containing a polyether and portion II which is a hard segment unit: ##STR1## R is a straight-chain or branched-chain alkylene group containing 2 to 4 carbon atoms, R' is ami |
| 4668762 |
Polycondensation catalyst |
May 26, 1987 |
| Condensation polymers of high molecular weight, such as polyesters, polyureas, and polyamides, are usually prepared at temperatures of 200.degree. C. or greater. However, by utilizing the catalyst system of the present invention condensation polymers can be synthesized at much lower |
