Patents by Inventor Syoji Morimura

Syoji Morimura 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).

  • Patent number: 4413076
    Abstract: Polymers containing polyalkylpiperidines, preparation and use thereof as stabilizers for synthetic polymer compositions are described. In said polymer, sterically hindered polyalkylpiperidines are laterally linked to the main chain. The polymers are distinguished by an improved stabilizing effect in various synthetic polymer compositions, such as polyolefins, against light- and/or heat-induced deterioration thereof. The polyalkylpiperidine-containing polymers of the invention are hardly volatile upon heat-processing or during storage of shaped articles containing said polymers, and are resistant to extraction with solvents.
    Type: Grant
    Filed: August 30, 1982
    Date of Patent: November 1, 1983
    Assignee: Sankyo Company Ltd.
    Inventors: Nobuo Soma, Syoji Morimura, Takao Yoshioka, Tomoyuki Kurumada
  • Patent number: 4321374
    Abstract: 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: Grant
    Filed: June 3, 1980
    Date of Patent: March 23, 1982
    Assignee: Sankyo Company, Limited
    Inventors: Syoji Morimura, Toshimasa Toda, Tomoyuki Kurumada
  • Patent number: 4265803
    Abstract: The invention entitled "Polymers containing polyalkylpiperidines and use thereof as stabilizers" provides a class of polymers in which groups containing sterically hindered polyalkylpiperidines are linked in the main chain of the polymers via bridging members containing 2-hydroxy-1,3-trimethylene groups.The polymers show superior stabilizing effects for various synthetic polymers such as polyolefins against degradation thereof induced by light and/or heat. The polymers have advantages, as compared with known stabilizer compounds, that they hardly volatile upon processing with heating or during storage of articles containing thereof, and that they are resistant to extraction with solvents from articles containing thereof.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: May 5, 1981
    Assignee: Sankyo Company Limited
    Inventors: Nobuo Soma, Syoji Morimura, Takao Yoshioka, Tomoyuki Kurumada
  • Patent number: 4241208
    Abstract: 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: Grant
    Filed: December 12, 1978
    Date of Patent: December 23, 1980
    Assignee: Sankyo Company Limited
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Ohsawa
  • Patent number: 4237294
    Abstract: 2,2,6,6-Tetramethylpiperidine derivatives having the formula ##STR1## wherein: X represents a group of formula ##STR2## R represents a hydrogen atom, methyl group, ethyl group, phenoxymethyl group or phenyl group;R' represents a methyl group or ethyl group; andm represents 0, 1 or 2,are excellent stabilizers for synthetic polymers.
    Type: Grant
    Filed: June 18, 1979
    Date of Patent: December 2, 1980
    Assignees: Sankyo Company, Limited, Ciba-Geigy Corporation
    Inventors: Nobuo Soma, Syoji Morimura, Takao Yoshioka, Tomoyuki Kurumada
  • Patent number: 4219465
    Abstract: Novel piperidine-spiro-hydantoin 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, small volatility upon heat-processing or during storage of shaped articles containing the compounds, and resistance to extraction with water and solvents.
    Type: Grant
    Filed: June 5, 1979
    Date of Patent: August 26, 1980
    Assignee: Sankyo Company Limited
    Inventors: Nobuo Soma, Syoji Morimura, Takao Yoshioka, Tomoyuki Kurumada
  • Patent number: 4212974
    Abstract: 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: Grant
    Filed: July 14, 1978
    Date of Patent: July 15, 1980
    Assignee: Sankyo Company Limited
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
  • Patent number: 4166813
    Abstract: New polyalkylated 4-aminopiperidine derivatives contain in their molecule two or three piperidine rings, each having two alkyl substituents at both the 2- and the 6- positions, optionally having substituents at the 1- and 3- positions and having an amino substituent at the 4- position. The piperidine rings are joined together by attachment of the 4-amino substituents through, where there are two piperidine rings, a polyalkylene, polyether or polyester chain, or through, where there are three piperidine rings, an isocyanurate or glycerol system. These compounds and their acid addition salts are useful as stabilizers for synthetic polymers.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: September 4, 1979
    Assignee: Sankyo Company Ltd.
    Inventors: Nobuo Soma, Syoji Morimura, Takao Yoshioka, Tomoyuki Kurumada
  • Patent number: 4162246
    Abstract: Hydantoin derivatives in which two or three piperidine spiro hydantoin residues are attached by means of substituted alkylene groups or polyoxyalkylene groups whose oxyalkylene chain is optionally interrupted by one or more phenylene or cyclohexylene groups or by means of substituted isocyanurate or glyceryl groups and, where they exist, acid addition salts thereof, are valuable as stabilizers for synthetic polymers.
    Type: Grant
    Filed: December 13, 1977
    Date of Patent: July 24, 1979
    Assignee: Sankyo Company Limited
    Inventors: Nobuo Soma, Syoji Morimura, Takao Yoshioka, Tomoyuki Kurumada
  • Patent number: 4125533
    Abstract: 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: Grant
    Filed: December 23, 1976
    Date of Patent: November 14, 1978
    Assignee: 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
  • Patent number: 4118368
    Abstract: Novel derivatives of 4-amino-2,6-dimethylpiperidine have additional methyl or substituted-methyl substituents at positions 2 and 6, and a carboxylate ester substituent at position 4. Positions 1 and 3, and the amino group at position 4, can optionally also be substituted. These derivatives are useful for stabilizing synthetic polymers, especially polyolefins, polyamides and polyurethanes, against photo- and thermal-deterioration, generally in an amount of 0.01 - 5.0% by weight based on the polymer.
    Type: Grant
    Filed: November 5, 1976
    Date of Patent: October 3, 1978
    Assignee: Sankyo Company Limited
    Inventors: Nobuo Soma, Syoji Morimura, Takao Yoshioka, Tomoyuki Kurumada
  • Patent number: 4066615
    Abstract: 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-(alkoxycarb
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: January 3, 1978
    Assignee: Sankyo Company Limited
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Ohsawa
  • Patent number: 4061616
    Abstract: A synthetic polymer composition stabilized against photo- and thermal deterioration thereof wherein there is incorporated, in a sufficient amount to prevent such deterioration, bipiperidyl derivatives.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: December 6, 1977
    Assignee: Sankyo Company Limited
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Tomoyuki Kurumada
  • Patent number: 4055536
    Abstract: New 2,2',6,6'-tetraalkyl-2,2',6,6'-tetramethyl-4,4'-bipiperidylidene derivatives, which are optionally substituted in the 1,1',3,3',5, and 5' positions are useful as stabilizers of organic substrates, particularly synthetic polymers, against photo- and thermal-deterioration. They may be prepared by condensing a corresponding 2,6-dialkyl-2,6-dimethyl-4-piperidone and then optionally introducing the desired substituents at the 1- and 1'-positions in the resulting bipiperidylidene derivative.
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: October 25, 1977
    Assignee: Sankyo Company Limited
    Inventors: Nobuo Soma, Takao Yoshioka, Tomoyuki Kurumada, Syoji Morimura
  • Patent number: 4016168
    Abstract: 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: Grant
    Filed: February 26, 1975
    Date of Patent: April 5, 1977
    Assignee: Sankyo Company Limited
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
  • Patent number: 4007158
    Abstract: 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: Grant
    Filed: July 3, 1974
    Date of Patent: February 8, 1977
    Assignee: Sankyo Company Limited
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
  • Patent number: 3984371
    Abstract: A new piperidine derivative and a synthetic polymer composition stabilized against photo- and thermal deterioration thereof wherein there is incorporated, in a sufficient amount to prevent such deterioration, said piperidine derivative.
    Type: Grant
    Filed: October 3, 1973
    Date of Patent: October 5, 1976
    Assignee: Sankyo Company Limited
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Tomoyuki Kurumada
  • Patent number: 3975462
    Abstract: 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: Grant
    Filed: October 22, 1974
    Date of Patent: August 17, 1976
    Assignee: Sankyo Company Limited
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Ohsawa
  • Patent number: 3975357
    Abstract: A synthetic polymer composition stabilized against photo- and thermal-deterioration thereof wherein there is incorporated, in a sufficient amount to prevent such deterioration, 1-substituted piperidine derivatives.
    Type: Grant
    Filed: April 5, 1974
    Date of Patent: August 17, 1976
    Assignee: Sankyo Company Limited
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka
  • Patent number: 3963730
    Abstract: A process for preparing triacetonamine, characterized in that acetonine is reacted with acetone in the presence of at least 12.5 mol % based on acetonine of an acid catalyst under anhydrous conditions. Triacetonamine is used as an intermediate for light stabilizer for synthetic polymers.
    Type: Grant
    Filed: June 21, 1974
    Date of Patent: June 15, 1976
    Assignee: Sankyo Company Limited
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Tomoyuki Kurumada