| Patent Number |
Title Of Patent |
Date Issued |
| 7008571 |
Optical component and sulfur-containing poly(thio)ester (co)polymer |
March 7, 2006 |
| A poly(thio)ester (co)polymer which comprises a repeating structural unit represented by the formula (1-A) as an essential structural unit: ##STR00001## [wherein R.sub.11 is a divalent aliphatic hydrocarbon group which may contain at least one sulfur atom in a sulfide group; R.sub.12 |
| 6797805 |
Organic polymers and novel polymerizable compounds |
September 28, 2004 |
| Organic polymers having water contact angles of 20.degree. or smaller, preferably 7.degree. or smaller and equipped with both high wettability and high transparency. The organic polymers may contain as partial structures polar structures of about 3 debyes or higher in dipole moment a |
| 6664425 |
Process for producing 1,3-bis(3-aminophenoxy)benzene |
December 16, 2003 |
| 1,3-Bis(3-aminophenoxy)benzene effective, for example, as a raw material for highly heat-resistant polyimide is produced industrially at a high yield by a reaction between 1,3-difluorobenzene and an alkali metal salt of 3-aminophenol. |
| 6664364 |
Selenium-containing transparent optical material |
December 16, 2003 |
| There are herein disclosed a transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them. In addition, there are also disclosed novel selenium-containing compounds represented by the follow |
| 6482918 |
Selenium-containing transparent optical material |
November 19, 2002 |
| There are herein disclosed a transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them. In addition, there are also disclosed novel selenium-containing compounds represented by the follow |
| 6458917 |
Polymerizable composition |
October 1, 2002 |
| An optical resin prepared by curing a polymerizable composition comprising a (thio)epoxy compound having at least one intramolecular disulfide bond exhibits a considerably high refractive index while maintaining good optical properties and a high Abbe number. In addition, the above p |
| 6365707 |
Polymerizable composition and process for producing optical resin comprising the same |
April 2, 2002 |
| A polymerizable composition according to the present invention is characterized by that it comprises a compound (a) having at least one structure represented by the following formula (1): ##STR1##wherein R.sub.1 is a divalent hydrocarbon group having 1 to 10 carbon atoms, R.sub.2, R. |
| 6303747 |
Selenium-containing transparent optical material |
October 16, 2001 |
| A transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them. In addition, there are also disclosed novel selenium-containing compounds represented by the following formulae (1), (2) a |
| 6300464 |
Polymerizable composition |
October 9, 2001 |
| An optical resin prepared by curing a polymerizable composition comprising a (thio)epoxy compound having at least one intramolecular disulfide bond exhibits a considerably high refractive index while maintaining good optical properties and a high Abbe number. In addition, the above p |
| 6204311 |
Polymerizable composition |
March 20, 2001 |
| An optical resin prepared by curing a polymerizable composition comprising a (thio)epoxy compound having at least one intramolecular disulfide bond exhibits a considerably high refractive index while maintaining good optical properties and a high Abbe number. In addition, the above p |
| 6124424 |
Selenized transparent optical material |
September 26, 2000 |
| A transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them. In addition, there are also disclosed novel selenium-containing compounds represented by the following formulae (1), (2) a |
| 6100362 |
Sulfur-containing urethane-based resin and composition and process for producing the resin |
August 8, 2000 |
| A polythiol having four or more functional groups, a process for producing the polythiol comprising reacting thiourea with a specific compound, a sulfur-containing urethane-based resin prepared from the polythiol and a lens made of the resin. The resin has a high refractive index, and lo |
| 5955206 |
Polysulfide-based resin composition, polysulfide-based resin, and optical material comprising th |
September 21, 1999 |
| A composition for polysulfide-based resin comprising a polythiol having 4 or more functional groups and a compound having a reactive unsaturated bond(s) and/or b epoxy group(s) and/or c iso(thio)cyanato group(s) in one molecule (however, a+b+c.gtoreq.2, and a and b are not simultaneously |
| 5837797 |
Process for preparing a sulfur-containing urethane-based plastic lens and the lens prepared ther |
November 17, 1998 |
| A novel polythiol having four or more functional groups, a process for producing the polythiol comprising reacting thiourea with a specific compound, a sulfur-containing urethane-based resin prepared from the polythiol and a lens made of the resin. The resin has a high refractive ind |
| 5753730 |
Plastic lenses having a high-refractive index, process for the preparation thereof and casting p |
May 19, 1998 |
| One aspect of the present invention relates to a process for preparing plastic lenses having a high-refractive index comprising forming a mixture containing one or more polyisocyanate compounds; one or more active hydrogen compounds selected from the group consisting of a polyol compound |
| 5693738 |
Composition for urethane-base plastic lens, urethane-base plastic lens obtained from the composi |
December 2, 1997 |
| A composition for a urethane-base plastic lens, comprising:(a) at least one ester compound selected from the group consisting of isocyanate compounds, isothiocyanate compounds and isocyanato-containing isothiocyanate compounds,(b) at least one active hydrogen compound selected from the group |
| 5608115 |
Polythiol useful for preparing sulfur-containing urethane-based resin and process for producing |
March 4, 1997 |
| A novel polythiol having four or more functional groups, a process for producing the polythiol comprising reacting thiourea with a specific compound, a sulfur-containing urethane-based resin prepared from the polythiol and a lens made of the resin. The resin has a high refractive ind |
| 5594088 |
Plastic lenses having a high-refractive index, process for the preparation thereof and casting p |
January 14, 1997 |
| One aspect of the present invention relates to a process for preparing plastic lenses having a high-refractive index comprising forming a mixture containing one or more polyisocyanate compounds; one or more active hydrogen compounds selected from the group consisting of a polyol compound |
| 5523467 |
Process for the preparation of aliphatic polyisocyanates |
June 4, 1996 |
| A process is provided for the preparation of an aliphatic polyisocyanate. Upon reacting an aliphatic polyamine or its hydrochloride or carbonate with phosgene in an inert liquid medium, the reaction is conducted while charging an inert gas into a reaction system. |
| 5302749 |
Stabilizing method of isocyanate compounds and isocyanate compositions stabilized thereby |
April 12, 1994 |
| A method for stabilizing an isocyanate compound by adding 10-5000 ppm of phenol to the isocyanate compound, and also an isocyanate composition so stabilized. In the isocyanate composition stabilized by the above method, coloring due to time-dependent changes and the occurrence of turbidi |
| 5194559 |
Optical urethane resins and plastic lenses comprising the same |
March 16, 1993 |
| Optical urethane resins according to the present invention are each obtained by reacting an active hydrogen compound with an isocyanate compound containing as a stabilizer a phenolic compound. Owing to their low yellowness, high light transmittance and optical-strain-free quality, th |
| 5126388 |
Highly-refractive plastic lens and process for making the lens |
June 30, 1992 |
| The present invention relates to a process for producing a plastic lens having a high refractive index and profile regularity comprising forming a mixture of one or more of sulfur-containing aromatic polyisocyanate compounds, one or more of active hydrogen compounds selected from the |
| 5084545 |
Resin having a large refractive index, lenses comprising the resin and process for preparing the |
January 28, 1992 |
| The present invention relates to a process for producing a resin useful in plastic lenses, to plastic lenses containing the resin and to a process for producing the lenses. |
| 5021503 |
Resin for plastic lens having high-refractive index, lens comprising the resin, and method for p |
June 4, 1991 |
| The present invention relates to resin useful in preparing plastic lenses having a high refractive index comprising reacting an aliphatic polyisocyanate compounds having at least one sulfur atom with one or more of active hydrogen compounds selected from the group consisting of a pol |
| 5013496 |
Process for molding a highly-refractive plastic lens |
May 7, 1991 |
| A process for producing a plastic lens having a high refractive index and profile regularity which includes forming a mixture of one or more of sulfur-containing aromatic polyisocyanate compounds, one or more of active hydrogen compounds selected from the group consisting of polyol compo |
| 4946923 |
S-alkyl thiocarbamate base resin, plastic lens comprising the resin, and process for making the |
August 7, 1990 |
| Disclosed herein are a novel and highly refractive S-alkyl thiocarbamate base resin useful in preparing lenses and a process for producing the resin comprising reacting one or more of polyisocyanate compounds and one or more of mercapto compound having at least one hydroxyl group, a plas |
| 4939306 |
Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor |
July 3, 1990 |
| A novel compound, 4-(4-hydroxyphenyl)-3-cyclohexene-1-ol, and a novel preparation process of 4,4'-biphenol by using the novel compound as the raw material.4-(4-Hydroxyphenyl)-3-cyclohexene-1-ol can be obtained by conducting a thermal decomposition reaction of 4,4-bis(4-hydroxyphenyl)cycl |
| 4929707 |
Polyurethane base lens resin, plastic lens comprising the resin and preparation method of the le |
May 29, 1990 |
| Polyurethane base lens resins obtained by reacting one or more of sulfur-containing polyisocyanates compound with one or more of sulfur-containing polyols, and polyurethane base lenses comprising these resins are disclosed.A method for preparing polyurethane base lenses which comprises a |
| 4877907 |
Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor |
October 31, 1989 |
| A novel compound, 4-(4-hydroxyphenyl)-3-cyclohexene-1-ol, and a novel preparation process of 4,4'-biphenol by using the novel compound as the raw material.4-(4-Hydroxyphenyl)-3-cyclohexene-1-ol can be obtained by conducting a thermal decomposition reaction of 4,4-bis(4-hydroxyphenyl)cycl |
| 4873374 |
Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor |
October 10, 1989 |
| A novel compound, 4-(4-hydroxyphenyl)-3-cyclohexene-1-ol, and a novel preparation process of 4,4'-biphenol by using the novel compound as the raw material.4-(4-Hydroxyphenyl)-3-cyclohexene-1-ol can be obtained by conducting a thermal decomposition reaction of 4,4-bis(4-hydroxyphenyl)cycl |
