| Patent Number |
Title Of Patent |
Date Issued |
| 7041354 |
Optical data carrier comprising a cyanine dye as light-absorbent compound in the information lay |
May 9, 2006 |
| Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer |
| 6950587 |
Optical fibers |
September 27, 2005 |
| An optical fiber that contains a core of polycarbonate and a coating is disclosed. The coating is a polymer that contains structural units conforming to specified formulae. Also disclosed is a process for producing the inventive fibers and their use for transmitting optical signals. |
| 6936325 |
Optical recording medium |
August 30, 2005 |
| An optical recording medium having at least a recording layer 11 and a light transmitting layer 13 formed on a substrate 10, in which the recording layer 11 is made of an organic material for absorbing an incident light of wavelength of 360 nm to 460 nm, and inducing physical change |
| 6907174 |
Optical fiber |
June 14, 2005 |
| An optical fiber that contains a core of polycarbonate and a coating is disclosed. The coating is a polymer that contains structural units conforming to specified formulae. Also disclosed is a method for preparing the inventive fibers and the use thereof for transmitting signals. |
| 6899939 |
Polymer mixtures |
May 31, 2005 |
| A thermoplastic molding composition especially suitable for preparing optical data carriers is disclosed. The composition contains polycarbonate resin, at least one mold release agent and at least one phosphite having a defined structural formula. The optical data carriers include compac |
| 6896945 |
Optical data carrier comprising a phthalocyanine dye as light-absorbent compound in the informat |
May 24, 2005 |
| The invention relates to an optical data carrier having a preferably transparent substrate that has optionally previously been coated with one or more reflection layers and to the surface of which has been applied a light-writeable information layer, optionally one or more reflection |
| 6855390 |
Optical data carriers and method for producing the same |
February 15, 2005 |
| A process for the preparation of optical data carriers made of a particualr polycarbonate is disclosed. The polycarbonate is prepared by the phase boundary process that entails reacting at least one dihydroxydiarylalkane in the form of its alkali metal salts with phosgene in the heteroge |
| 6835725 |
Optical data carrier comprising a cyanine dye as light-absorbent compound in the information lay |
December 28, 2004 |
| Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or |
| 6833193 |
Polycarbonate molded bodies with improved optical properties |
December 21, 2004 |
| A polycarbonate molding having improved optical properties is disclosed. The molding features an angle of deflection .alpha..sub..epsilon. (min) determined in a accordance with DIN 52305-A-AS of .ltoreq.2.0 and a refractive index D.sub..epsilon. (min) determined in accordance with DIN |
| 6825257 |
Polymer blends with mould-release agents |
November 30, 2004 |
| A thermoplastic polymer mixture comprising at least on thermoplastic polycarbonate polymer, and at least one mold release agent including at least one polyol component, is described. At least one polyol component (I) of the mold release agent consists of a parent substance with at least |
| 6737142 |
Optical data store comprising an axially substituted cobalt phthalocyanine in the light-writeabl |
May 18, 2004 |
| Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or |
| 6734278 |
Production of polyester carbonates |
May 11, 2004 |
| The present invention provides a two-stage process for the production of polyester carbonates with aliphatic dicarboxylic acids, the polyester carbonates obtained thereby, a process for the production of extrudates and molded articles from the polyester carbonates, and the extrudates and |
| 6726972 |
Optical data storage medium containing a diaza hemicyanine dye as the light-absorbing compound i |
April 27, 2004 |
| An optical data storage medium containing a preferably transparent substrate which has optionally already been coated with one or more reflecting layers and onto the surface of which a photorecordable information layer, optionally one or more reflecting layers, and optionally a prote |
| 6706797 |
Polycarbonate molding compounds with good demolding properties and molded bodied and semifinishe |
March 16, 2004 |
| A thermoplastic molding composition comprising polycarbonate resin having improved mold release properties is disclosed the composition contain polycarbonate resin and 0.005 to 5.0% relative to the weight of the composition of at least one hydrocarbon in the form of C15.sub.-600 -met |
| 6641889 |
Optical data storage medium containing a triazacyanine dye as the light-absorbing compound in th |
November 4, 2003 |
| An optical data storage medium containing a preferably transparent substrate which has optionally already been coated with one or more reflecting layers and onto the surface of which a photorecordable information layer, optionally one or more reflecting layers, and optionally a prote |
| 6395864 |
Polycarbonates with a low yellowness index |
May 28, 2002 |
| A process for the preparation of polycarbonate resins having a low yellowness index is described. The process involves converting phosgene with a sodium bisphenolate solution by means of a phase interface process performed with the exclusion of oxygen. The sodium bisphenolate solution |
| 6359042 |
Polycarbonate moulding compounds and their use as layers in coextruded sheets |
March 19, 2002 |
| A polycarbonate molding composition containing a UV absorber and two types of mold release agents is disclosed. The composition is suitable for use as coating or external layer on coextruded sheets. |
| 6350798 |
Use of saccharin for stabilizing thermoplastic, aromatic polycarbonates |
February 26, 2002 |
| A thermoplastic molding composition comprising aromatic polycarbonate, saccharine and a compound having at least one ester group in its structure is disclosed. The inventive composition is characterized in its improved stability and hence suitable for the preparation of stable films, com |
| 6225512 |
Method for producing and purifying 3-(3-hydroxyphenyl)-1,1,3-trimethylindan-5-ol |
May 1, 2001 |
| A process is disclosed for the preparation and purification of 3-(4-hydroxyphenyl)-1,1,3-trimethylindan-5-ol. Accordingly, isopropenylphenol, its dimers or oligomers undergo isomerization in the presence of an acid catalyst, the reaction mixture is optionally neutralized by adding a |
| 6218502 |
Copolycarbonates with an indane bisphenol base |
April 17, 2001 |
| A copolycarbonate having glass transition temperature not higher than 160.degree. C. and a rheooptic constant not higher than 4 is disclosed. Containing structural units conforming to ##STR1##wherein the radicals R.sub.1 each independently denotes a C.sub.1-12 -alkyl radical or a hal |
| 5852138 |
Stabilizer mixtures and their use in polycarbonates |
December 22, 1998 |
| The invention provides stabilizer mixtures comprising phosphines, silicon compound and optionally silicon-free oxetane compounds and/or silicon-free epoxide compounds and their use for stabilizing thermoplastic aromatic polycarbonates. |
| 5545710 |
Use of special polycarbonates for the production of optical articles |
August 13, 1996 |
| The present invention provides the use of polycarbonates containing carbonate structural units of the formula (I), ##STR1## for the production of optical articles, novel polycarbonates, which contain the structural units (I), together with a process for the production of these no |
| 5436034 |
Process for improving the adhesiveness of electrolessly deposited metal films |
July 25, 1995 |
| Electrolessly deposited metal films having improved adhesion can be obtained by coating the surface of the substrates to be metallized with a formulation consisting of UV-curable varnishes which contain noble metal compounds as activators and, in addition, either fillers or solvents or a |
| 5410014 |
Method of preparing aliphatic-aromatic polycarbonates |
April 25, 1995 |
| A method of preparing aliphatic-aromatic polycarbonate resin is disclosed. Accordingly, the method entails reacting an oligocarbonate of diphenol having chlorocarbonic acid ester terminal groups, with an aliphatic diol, in a non-aqueous solvent. The amount of solvent is such that the |
| 5408027 |
Process for the production of aliphatic-aromatic polycarbonates |
April 18, 1995 |
| A process for producing an aliphatic-aromatic polycarbonate is disclosed. The process comprise (A) reacting in an anhydrous neutral solvent (i) an oligocarbonate of diphenol with (ii) an aliphatic dicarboxylic acid, and (B) eliminating the hydrogen chloride and carbon dioxide by-products |
| 5326851 |
Low-viscosity polyarylene sulfides |
July 5, 1994 |
| The invention relates to low-viscosity polyarylene sulfides (PAS), preferably polyphenylene sulfides (PPS), which are produced with cycloaliphatic, unsaturated acids as molecular weight regulators. |
| 5093457 |
Production of polyamide imides |
March 3, 1992 |
| The invention relates to a process for the production of polyamide imides from diimidodicarboxylic acids, trimellitic imidocarboxylic acids and diisocyanates and to their use as moldings, films and binders for paints. |
| 5004795 |
Aliphatic-aromatic polyamide-imides |
April 2, 1991 |
| The invention relates to aliphatic-aromatic polyamide-imides and their use for the production of shaped articles. |
| 4919514 |
Optical fibres based on polycarbonate fibres, and a process for the production thereof |
April 24, 1990 |
| A process for the production of optical fibers based on aromatic polycarbonates wherein the polycarbonate fibres are coated with a plastic, the improvement which comprises(a) to coat the fiber with an UV irradiation-polymerizable mixture which comprises(A) 25 to 75% by weight, based on t |
| 4774178 |
Immobilization of biological material within a polymer matrix |
September 27, 1988 |
| Biological material such as microorganisms is immobilized by polymerizing in the presence of the biological material a readily soluble polyetherpolyol having some hydroxyl groups esterified with acrylic and/or methacrylic acid and remaining hydroxyl groups reacted with an isocyanate |
