Patents by Inventor Toshimasa Toda
Toshimasa Toda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5486556Abstract: A polymer composition comprising a polymer stabilized against the effects of light and heat by the incorporation of a polymer stabilizer, wherein the polymer stabilizer comprises at least one compound selected from the group consisting of compounds of formula (I): ##STR1## wherein R.sup.1 is hydrogen, alkyl, alkoxyalkyl, carboxylic acyl or phenylalkyl, or an optionally substituted tetramethylpiperidyl group; R.sup.2 is hydrogen, alkyl, carboxylic acyl or phenylalkyl group; R.sup.3 is alkylene optionally interrupted by at least one oxygen atom; X is oxygen or --NR.sup.5 --, wherein R.sup.Type: GrantFiled: May 2, 1995Date of Patent: January 23, 1996Assignee: Sankyo Company, LimitedInventors: Toshimasa Toda, Satoru Naito, Hisayu Osawa, Takaaki Yamazaki
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Patent number: 5446144Abstract: A compound of formula (I): ##STR1## wherein: R.sup.1 is hydrogen, alkyl, alkoxyalkyl, carboxylic acyl or phenylalkyl, or an optionally substituted tetramethylpiperidyl group: R.sup.2 is hydrogen, alkyl, carboxylic acyl or phenylalkyl group; R.sup.3 is alkylene optionally interrupted by at least one oxygen atom X is oxygen or --NR.sup.5 --; wherein R.sup.5 is hydrogen or alkyl,: Y is --OCO--, --COO--, --CONH-- or --OCONH--; n is 2 to 4; and, when n is 2, Z is alkylene optionally interrupted by at least one oxygen, sulfur or aryl, cycloalkyl or heterocyclic group, or, when n is 3, Z is alkanetriyl in which a carbon is optionally replaced by nitrogen or, when n is 4, Z is alkanetetrayl optionally interrupted by at least one oxygen atom and acid addition salts thereof are valuable polymer stabilizers.Type: GrantFiled: February 2, 1990Date of Patent: August 29, 1995Assignee: Sankyo Company, LimitedInventors: Toshimasa Toda, Satoru Naito, Hisayu Osawa, Takaaki Yamazaki
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Patent number: 5096948Abstract: The present invention relates to weather resistant resin compositions consisting essentially of at least one polymeric substance and comprising discoloration effective amounts of:(i) a hindered amine stabilizer;(ii) a hindered-phenol-hindered amine stabilizer; and(iii) a UV absorber.Type: GrantFiled: June 22, 1990Date of Patent: March 17, 1992Assignees: Sankyo Company, Limited, Monsanto Kasei CompanyInventors: Tomoyuki Kurumada, Hisayu Osawa, Toshimasa Toda, Hiromi Tomono, Ryuichi Hasegawa
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Patent number: 4533688Abstract: Bis(piperidylaminotriazylamino)-(piperidylaminotriazylaminomethyl)-octane derivatives are novel compounds which are valuable as stabilizers for synthetic polymers.Type: GrantFiled: December 19, 1983Date of Patent: August 6, 1985Assignee: Sankyo Company LimitedInventors: Toshimasa Toda, Tomoyuki Kurumada
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Patent number: 4321374Abstract: Novel triazine derivatives represented by the general formula (I) and use thereof as light stabilizers for synthetic polymers are described. ##STR1## The compounds are distinguished by an improved stabilizing effect in various synthetic polymer compositions, such as polyolefins, against light- and/or heat-induced deterioration thereof, low volatility upon heat-processing or during storage of shaped articles containing the compounds, and resistance to extraction with water and solvents.Type: GrantFiled: June 3, 1980Date of Patent: March 23, 1982Assignee: Sankyo Company, LimitedInventors: Syoji Morimura, Toshimasa Toda, Tomoyuki Kurumada
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Patent number: 4241208Abstract: Piperidine derivatives having the formula ##STR1## wherein R' represents an alkyl, an acyl, an alkoxycarbonyl, an amino or nitroso group;X represents oxygen or sulfur;Y represents oxygen, sulfur or a group of the formula .dbd.N--R" in which R" is hydrogen or alkyl;Z represents oxygen or a group of the formula >N--R'" in which R'" is hydrogen or alkyl;n is an integer of 1 to 4; andR represents, when n is 1, alkyl, aryl, cycloalkyl, alkoxycarbonyl, substituted phosphino or substituted phosphinyl, when n is 2, alkylene, alkenylene, arylene, aralkylene; alkylenediphenylene, bis-(alkoxycarbonyl) alkylene, alkylene-bis-(oxycarbonylalkyl), dialkylene ether or diphenylene ether, when n is 3, alkanetriyl,tris-(alkoxycarbonyl)alkanetriyl, alkanetriyl-tris-(oxycarbonylalkyl) or a group of the formula ##STR2## in which p is an integer of 1 through 8 inclusive, and, when n is 4, alkanetetrayl,tetrakis-(alkoxycarbonyl) alkanetetrayl or alkanetetrayl-tetrakis-(oxycarbonylalkyl).Type: GrantFiled: December 12, 1978Date of Patent: December 23, 1980Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Ohsawa
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Patent number: 4212974Abstract: A novel piperidine derivative having a stabilizing effect on a synthetic polymeric material and a composition comprising said piperidine derivative and a synthetic polymeric material.Type: GrantFiled: July 14, 1978Date of Patent: July 15, 1980Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
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Patent number: 4125533Abstract: A novel piperidine derivative having a stabilizing effect on a synthetic polymeric material and a composition comprising said piperidine derivative and a synthetic polymeric material.Type: GrantFiled: December 23, 1976Date of Patent: November 14, 1978Assignee: Sankyo Co. Ltd.Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
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Patent number: 4066615Abstract: A synthetic polymer composition stabilized against photo- and thermal-deterioration comprising a stabilizing amount of a compound having the formula ##STR1## wherein R' represents an alkyl, an acyl, an alkoxycarbonyl, an amino or nitroso group;X represents oxygen or sulfur;Y represents oxygen, sulfur or a group of the formula = N - R" in which R" is hydrogen or alkyl;Z represents oxygen or a group of the formula >N - R'" in which R'" is hydrogen or alkyl;N is an integer of 1 to 4; andR represents, when n is 1, alkyl, aryl, cycloalkyl, alkoxycarbonyl, substituted phosphino or substituted phosphinyl, when n is 2, alkylene, alkenylene, arylene, aralkylene; alkylenediphenylene, bis-(carboxycarbonyl) alkylene, alkylene-bis-(oxycarbonylalkyl), dialkylene ether or diphenylene ether, when n is 3, alkanetriyl, tris-(alkoxycarbonyl)alkanetriyl, alkanetriyl-tris-(oxycarbonylalkyl) or a group of the formula ##STR2## in which p is an integer of 1 through 8 inclusive, and, when n is 4, alkanetetrayl,tetrakis-(alkoxycarbType: GrantFiled: April 11, 1975Date of Patent: January 3, 1978Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Ohsawa
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Patent number: 4016168Abstract: A novel piperidine derivative having a stabilizing effect on a synthetic polymeric material and a composition comprising said piperidine derivative and a synthetic polymeric material.Type: GrantFiled: February 26, 1975Date of Patent: April 5, 1977Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
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Patent number: 4007158Abstract: Novel piperidine derivatives of formula: ##STR1## (wherein 2 or 3 of R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 represent alkyl groups having from 1 to 4 carbon atoms and the remainder of R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are hydrogen atoms, and R.sub.6 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, a substituted alkyl group, an aliphatic acyl group, an alkoxycarbonyl group or an aralkoxycarbonyl group) are useful as stabilizers for synthetic polymers.Type: GrantFiled: July 3, 1974Date of Patent: February 8, 1977Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
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Patent number: 4005094Abstract: Piperidine-spiro-hydrantoin derivatives having the formula ##STR1## wherein X represents oxygen atom or sulfur atom; n is an integer of 1 to 4 inclusive; andR represents, when n is 1, an alkenyl group which may be substituted with halogen, an alkynyl group which may be substituted with phenyl, an aralkyl group which may be substituted with halogen, alkyl of 1 to 4 carbon atoms or halomethyl, a hydroxyalkyl group, an alkoxyalkyl group, an alkenyloxyalkyl group, an acryloxyalkyl group, an alkylthioalkyl group, an acyloxyalkyl group, an epoxyalkyl group, an N-alkyl-substituted aminoalkyl group, an alkoxycarbonylalkyl group, an aryloxycarbonylalkyl group, an aliphatic acyl group, an alkoxycarbonyl group, a phosphino group which is substituted with phenoxy or alkoxy or a phosphinyl group which is substituted with phenoxy or alkoxy,When n is 2, an alkenylene group of 4 to 18 carbon atoms, a dialkyleneether group, an aralkylene group, a bis(acyloxyalkylene) group or an alkylene-bis(oxycarbonylalkyl) group,When n isType: GrantFiled: January 10, 1975Date of Patent: January 25, 1977Assignee: Sankyo Company LimitedInventors: Keisuku Murayama, Syoji Moriyama, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohata, Hisayou Ohsawa
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Patent number: 3975462Abstract: Piperidine-spiro-hydantoin derivatives having the formula ##SPC1##Wherein X represents oxygen atom or sulfur atom; n is an integer of 1 to 4 inclusive, and R represents various aliphatic or aromatic groups depending on the value of n.These compounds (I) are useful as stabilizers against photo and thermal deterioration of various synthetic polymers and can be prepared, for example, by reacting the corresponding 3-unsubstituted piperidine-spiro-hydantoin compound with the halide R-(X.sub.1).sub.n in which R and n are as defined herein and X.sub.1 is a halogen atom.Type: GrantFiled: October 22, 1974Date of Patent: August 17, 1976Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Ohsawa
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Patent number: 3941744Abstract: Piperidine derivatives having the formula ##SPC1##WhereinR' represents an alkyl group, a substituted alkyl group, an acyl group, an alkoxycarbonyl group, a substituted alkoxycarbonyl group, an amino group, a substituted amino group, or nitroso group;X represents oxygen atom or sulfur atom;Y represents oxygen atom, sulfur atom or a group of the formula = N -- R" in which R" is hydrogen atom, an alkyl group or a substituted alkyl group;Z represents oxygen atom or a group of the formula >N -- R'" in which R'" is hydrogen atom, an alkyl group or a substituted alkyl group;n is an integer of 1 through 4 inclusive; andR represents, when n is 1, an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group, a cycloalkyl group, an alkoxycarbonyl group, a substituted alkoxycarbonyl group, a substituted phosphino group or a substituted phosphinyl group, when n is 2, an alkylene group, an alkenylene group, an arylene group, a substituted arylene group, an aralkylene group; an alkylenediphenylene gType: GrantFiled: March 12, 1973Date of Patent: March 2, 1976Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohata, Hisayou Ohsawa
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Patent number: 3940401Abstract: 4-Piperidone ketal derivatives of the formulae ##SPC1##And ##SPC2##Wherein R.sub.1 represents an alkyl group of 1 to 8 carbon atoms and R.sub.2 represents an alkylene group of 2 or 3 carbon atoms or o-phenylene group and they are prepared by reacting triacetonamine with a monohydric alcohol of the formulaR.sub.1 --OH (III)wherein R.sub.1 is as defined above or a dihydric alcohol or phenol of the formulaR.sub.2 --(OH).sub.2 (IV)wherein R.sub.2 is as defined above in the presence of an acid catalyst. They are useful as statilizers against deterioration of synthetic polymers.Type: GrantFiled: July 24, 1974Date of Patent: February 24, 1976Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Toshimasa Toda, Eiko Mori, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Onta, Ichiro Watanabe