| Patent Number |
Title Of Patent |
Date Issued |
| 7750109 |
Use of a residual oligomer recyclate in the production of macrocyclic polyester oligomer |
July 6, 2010 |
| The invention relates to methods and systems for the use of an oligomer recyclate from a depolymerization product stream. The oligomer byproduct of a polyester depolymerization reaction can be used as a reactant in the formation of a polyester. For example, linear oligomer byproduct can |
| 7732557 |
Methods for removing catalyst residue from a depolymerization process stream |
June 8, 2010 |
| The invention relates to methods and systems for selective removal of catalyst residue from a depolymerization product stream without a water quench, as well as methods and systems for subsequent recovery of residual linear oligomer. The substantially metal-free and substantially wat |
| 7273650 |
Weatherable multilayer resinous articles and method for their preparation |
September 25, 2007 |
| Substantially solvent-free multilayer articles characterized by excellent color retention and gloss retention, solvent resistance and recyclability comprise a substrate layer which may be at least one of polycarbonates, polyesters and ABS and ASA copolymers, and a resinous coating layer |
| 6995294 |
Method for producing bisphenol catalysts and bisphenols |
February 7, 2006 |
| This disclosure relates to a method for producing and using catalysts in the production of bisphenols, and in particular to a method for producing catalysts which contain poly-sulfur mercaptan promoters, and using these catalysts in the production of bisphenol-A and its derivatives. |
| 6992228 |
Method for producing bisphenol catalysts and bisphenols |
January 31, 2006 |
| This disclosure relates to a method for producing and using catalysts in the production of bisphenols, and in particular to a method for producing catalysts which contain poly-sulfur mercaptan promoters, and using these catalysts in the production of bisphenol-A and its derivatives. |
| 6884894 |
Method for producing bisphenol catalysts and bisphenols |
April 26, 2005 |
| This disclosure relates to a method for producing and using catalysts in the production of bisphenols, and in particular to a method for producing catalysts which contain poly-sulfur mercaptan promoters, and using these catalysts in the production of bisphenol-A and its derivatives. |
| 6872860 |
Method for producing bisphenol catalysts and bisphenols |
March 29, 2005 |
| This disclosure relates to a method for producing and using catalysts in the production of bisphenols, and in particular to a method for producing catalysts which contain poly-sulfur mercaptan promoters, and using these catalysts in the production of bisphenol-A and its derivatives. |
| 6620939 |
Method for producing bisphenol catalysts and bisphenols |
September 16, 2003 |
| This disclosure relates to a method for producing and using catalysts in the production of bisphenols, and in particular to a method for producing catalysts which contain poly-sulfur mercaptan promoters, and using these catalysts in the production of bisphenol-A and its derivatives. |
| 6572956 |
Weatherable multilayer resinous articles and method for their preparation |
June 3, 2003 |
| Substantially solvent-free multilayer articles characterized by excellent color retention and gloss retention, solvent resistance and recyclability comprise a substrate layer comprising a first material selected from the group consisting of a metal, ceramic, glass, a cellulosic material, |
| 6538065 |
Method for preparing copolyestercarbonates and articles therefrom |
March 25, 2003 |
| Block copolyestercarbonates substantially free of anhydride linkages linking at least two mers of the polymer chain may be prepared by a method which comprises the steps of: (A) preparing a hydroxy-terminated polyester intermediate in a molten reaction mixture comprising at least one |
| 6534686 |
Method for producing bisphenol catalysts and bisphenols |
March 18, 2003 |
| This disclosure relates to a method for producing and using catalysts in the production of bisphenols, and in particular to a method for producing catalysts which contain attached mercaptan promoters, and using these catalysts in the production of bisphenol-A and its derivatives. |
| 6414200 |
Silylmethanethiols as promoters for bisphenol production |
July 2, 2002 |
| Silylmethanethiols have been found to be useful promoters in the acid catalyzed condensation reaction between phenol and acetone to afford bisphenol A. Silylmethanethiols provide improvements in both the rate and selectivity of bisphenol A formation relative to known thiol promoters |
| 6251354 |
Process for recovering sodium nitrite |
June 26, 2001 |
| The present invention provides a process for recovering a metal nitrite, e.g., sodium nitrite, from a reaction mixture formed from an aromatic displacement reaction such as the synthesis of an aromatic bis(ether phthalimide) in an organic non-polar solvent. The process comprises form |
| 6143839 |
Weatherable blends of polycarbonates with arylate polymers |
November 7, 2000 |
| Weatherability of polycarbonates, or of blends of polycarbonates with other polymers such as polyesters, is improved by incorporating therein a thermoplastic arylate polymer comprising units derived from a resorcinol or alkylresorcinol isophthalate-terephthalate. These units may be combi |
| 5969086 |
Quaternary bisphenolates, methods for their preparation, and uses thereof |
October 19, 1999 |
| Quaternary salts having a double helix structure are prepared by the reaction of dihydroxyaromatic compound, preferably a bisphenol, with an alkali metal hydroxide and a quaternary salt, such as a tetraalkylammonium or hexaalkylguanidinium chloride. The quaternary salts and their alkalin |
| 5916997 |
Weatherable copolymers |
June 29, 1999 |
| Disclosed are weatherable polyester soft block copolymer compositions comprising copolymers of resorcinol or alternatively phenol, aromatic dicarboxylic acid, and a aliphatic dicarboxylic acid based structural units. These polyester soft block copolymers comprise a substantial propor |
| 5905150 |
Process for preparing organosilanes |
May 18, 1999 |
| An improved process for preparing a nitrogen or oxygen containing organoalkoxysilane such as an isocyanurate or fumarate by reacting a haloalkylaikoxysilane such as a chloropropytrimethoxysilane and a reactant of either a cyanate or an ammonium salt of an organic acid of C1-C20 carbo |
| 5863992 |
Tetraphenols and their use as polycarbonate branching agents |
January 26, 1999 |
| Branched polycarbonates having properties suitable for blow molding are prepared by equilibrating a linear or branched aromatic polycarbonate with certain tetraphenols, especially 2,2,5,5-tetrakis (4-hydroxyphenyl)hexane and [1,1-bis(p-hydroxyphenyl)ethyl]-phenyl ether. |
| 5797995 |
Method for thermal removal of halogenated organic compounds from soil |
August 25, 1998 |
| A method for removing halogenated organic compounds from contaminated particulate material. Formic acid is dry mixed with the contaminated material and an external heating means is used at temperatures of about 250.degree.-450.degree. C. for 10-50 minutes to drive the halogentated or |
| 5779810 |
Method to remove halogenated hydrocarbons from particulate matter |
July 14, 1998 |
| A method is disclosed for the removal of halogenated organic contaminants from particulate material by admixing a monocarboxylic acid with the particulate material, and passing a vapor phase of steam through the material to substantially remove the halogenated organic contaminant. |
| 5756843 |
Quaternary bisphenolates, methods for their preparation, and uses thereof |
May 26, 1998 |
| Quaternary salts having a double helix structure are prepared by the reaction of dihydroxyaromatic compound, preferably a bisphenol, with an alkali metal hydroxide and a quaternary salt, such as a tetraalkylammonium or hexaalkylguanidinium chloride. The quaternary salts and their alkalin |
| 5688335 |
Contaminant removal from material |
November 18, 1997 |
| Contaminated material is treated with heat and steam to remove halogenated organic compounds from the material. The heating temperature can be lowered by admixing an additive with the contaminated material. A short passage of steam at a flow rate of about at least 0.5 pounds of water by |
| 5663406 |
Formation of carbonate esters and orthocarbonates |
September 2, 1997 |
| A carbonate ester is produced by the metal-induced reaction of a hydroxy compound with a sulfur compound in a melt process. An orthocarbonate can also be produced. The orthocarbonate can be converted into carbonate ester in a subsequent operation. |
