Patents Assigned to Adeka Argus Chemical Co., Ltd.
  • Patent number: 5081170
    Abstract: The present invention provides a stabilized polyolefin resin composition having improved resistances to oxidation and to weather which is prepared by adding (a) a phenol antioxidant, (b) a sulfur antioxidant, (c) a hindered amine light stabilizer and (d) an aliphatic monocarboxylate of a metal belonging to the group Ia or IIb to a polyolefin resin containing an inorganic filler.
    Type: Grant
    Filed: March 22, 1991
    Date of Patent: January 14, 1992
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Masaki Yagi, Takao Nishina, Kazuo Sugibuchi
  • Patent number: 5081099
    Abstract: A heat-sensitive recording material wherein a color-forming layer comprising a coupling substance which is usually colorless or light-colored and a developer which gives rise to color in the coupling substance upon heating further contains, as a sensitizer, a tetrahydronaphthalene compound of the following general formula (I): ##STR1## wherein X represents an alkylene group, --O--CO--O--, --O--CO-- or --O--R'.sub.n Y--, n represents 1 or 2, Y represents --O-- or --S--, R' represents an alkylene group, and R represents a phenyl, alkylphenyl or tetrahydronaphthyl group.
    Type: Grant
    Filed: July 19, 1990
    Date of Patent: January 14, 1992
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Mitsuo Akutsu, Syuji Iwakura, Keiji Oya
  • Patent number: 5047169
    Abstract: A tolane compound represented by the following general formula (I) which can elevate the anisotropy (.DELTA.n) of the refractive index of a liquid crystal composition: ##STR1## wherein R represents an alkynyl or an alkadienyl group having 3 to 18 carbon atoms, and R' represents an alkyl or an alkoxy group having 1 to 18 carbon atoms.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: September 10, 1991
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Toshihiro Shibata, Norio Kurosawa
  • Patent number: 5045433
    Abstract: A substituted acridine derivative represented by ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are independently hydrogen atoms, alkyl groups, substituted alkyl groups, aryl groups, substituted aryl groups, halogen atoms, or alkoxy groups, and Z.sub.1 is a six-membered heteroaromatic group which has one or two nitrogen atoms in its ring and may have an alkyl substituent having 1 to 8 carbon atoms, or a quinolyl group; and a photopolymerizable composition comprising 0.01 to 10 parts by weight of said derivative, 100 parts by weight of a photopolymerizable compound having a boiling point of 100.degree. C. or higher at atmospheric pressure and at least one kind of ethylenic unsaturated group, and 0 to 400 parts by weight of a thermoplastic organic polymer.
    Type: Grant
    Filed: May 30, 1990
    Date of Patent: September 3, 1991
    Assignees: Hitachi Chemical Co., Ltd., Adeka Argus Chemical Co., Ltd.
    Inventors: Hajime Kakumaru, Yoshitaka Minami, Naohiro Kubota, Shinya Mashimo
  • Patent number: 5043094
    Abstract: An optically active bisaryl compound represented by the general formula (I): ##STR1## wherein Ar.sub.1 and Ar.sub.2 represent each a phenyl, naphthyl, biphenyl or pyrimidylphenyl group optionally substituted with an alkyl, alkoxy, cyano or cycloalkyl group or a halogen atom, and * represents an asymmetric carbon atom,which can give a cholesteric phase of a short helical pitch when added to nematic liquid crystals useful as a component of a liquid crystal mixture for a display device.
    Type: Grant
    Filed: March 20, 1989
    Date of Patent: August 27, 1991
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Seiichi Takano, Kunio Ogasawara, Toshihiro Shibata, Norio Kurosawa
  • Patent number: 5039723
    Abstract: A synthetic resin composition stabilized particularly against the deterioration caused by the action of heat and light, which comprises 100 parts by weight of a synthetic resin, 0.001 to 10 parts by weight of a cyclic phosphite compound represented by the following general formula (I) and 0.001 to 10 parts by weight of a hindered amine compound having a group represented by the following general formula (II) in its molecule: ##STR1## wherein R.sub.1 stands for a tert-butyl or tert-amyl group; R.sub.2 stands for a C.sub.1.about.9 alkyl group; R.sub.3 stands for a hydrogen atom or a C.sub.1.about.4 alkyl group and R.sub.4 stands for a C.sub.1.about.30 alkyl group.
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: August 13, 1991
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Tohru Haruna, Kazunori Nishikawa
  • Patent number: 5013475
    Abstract: An optically active ester compound useful as a component of a ferroelectric liquid crystal composition is represented by the following formula: ##STR1## wherein R is C.sub.1-18 alkyl or C.sub.1-18 alkoxyl; R' is C.sub.1-18 alkyl or C.sub.
    Type: Grant
    Filed: October 27, 1989
    Date of Patent: May 7, 1991
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Toshihiro Shibata, Masaki Kimura, Norio Kurosawa
  • Patent number: 4999393
    Abstract: A cyclic phosphonite compound having the following formula (I) is disclosed and useful as a stabilizer for a synthetic resin. ##STR1## in which R1 is an alkyl, phenyl or an alkylphenyl, R2 is hydrogen or an alkyl, R3 is an alkyl, R4 is hydrogen or methyl and R1 and R2 may form an alkylene by linking each other.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: March 12, 1991
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Tohru Haruna, Kazunori Nishikawa
  • Patent number: 4997888
    Abstract: A process is provided for improving the resistance to deterioration when exposed to weather and the adherence to other materials of polypropylene, particularly in the form of moldings, which comprises subjecting a surface of polypropylene to the action of activated oxygen gas at a temperature below about 100.degree. C. in the presence of an N-alkyl or N-acyl 2,2,6,6-tetramethyl piperidyl compound for a time sufficient to improve such weather resistance and adherence.
    Type: Grant
    Filed: July 6, 1989
    Date of Patent: March 5, 1991
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Tetsuo Sekiguchi, Yutaka Nakahara, Masaki Yagi, Naotoshi Sonoda
  • Patent number: 4994529
    Abstract: A process is provided for improving the resistance to deterioration when exposed to weather and the adherence to other materials of polypropylene, particularly in the form of moldings, which comprises subjecting a surface of polypropylene to the action of activated oxygen gas at a temperature below about 100.degree. C. in the presence of an N-alkyl or N-acyl 2,2,6,6-tetramethyl piperidyl compound for a time sufficient to improve such weather resistance and adherence.
    Type: Grant
    Filed: December 6, 1989
    Date of Patent: February 19, 1991
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Tetsuo Sekiguchi, Masaki Yagi, Yutaka Nakahara, Naotoshi Sonoda
  • Patent number: 4985564
    Abstract: Acridine compounds such as 1,4-butylene-bis-.beta.-(acridin-9-yl)acrylate, or the like are high in light sensitivity and suitable as a photopolymerization initiator.
    Type: Grant
    Filed: September 1, 1989
    Date of Patent: January 15, 1991
    Assignees: Hitachi Chemical Co., Ltd., Adeka Argus Chemical Co., Ltd.
    Inventors: Hajime Kakumaru, Yoshitaka Minami, Naohiro Kubota, Shinya Mashimo
  • Patent number: 4981967
    Abstract: The present invention discloses an optically active pyrimidine compound represented by the following general formula: ##STR1## wherein, n is 3 to 5; X is hydrogen atom or chlorine atom; when X is hydrogen atom, R.sub.1 is normal alkyl having from 1 to 12 carbon atoms and when X is chlorine atom, R.sub.1 is hydrogen atom or normal alkyl having from 1 to 12 carbon atoms; R.sub.2 is normal alkyl having from 1 to 18 carbon atoms; and C* represents an asymmetric carbon atom.
    Type: Grant
    Filed: July 7, 1988
    Date of Patent: January 1, 1991
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Toshihiro Shibata, Masaki Kimura
  • Patent number: 4980083
    Abstract: An optically active compound useful as a component of a ferroelectric liquid crystal composition represented by the following general formula (I) and a ferroelectric liquid crystal composition containing the same: ##STR1## wherein R stands for a C.sub.1.about.18 alkyl group; R' stands for a C.sub.1.about.18 alkyl group which may be substituted or an aryl group; X stands for ##STR2## or --O-- and an asterisk refers to an optically active carbon atom.
    Type: Grant
    Filed: February 14, 1990
    Date of Patent: December 25, 1990
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Toshihiro Shibata, Masaki Kimura
  • Patent number: 4980336
    Abstract: A heat-sensitive recording material wherein 1,2-bis(3,4-dimethylphenyl)ethane is contained as a sensitizer in a color-forming layer comprising a usually colorless or light-colored coupling substance and a developer which causes coloring of the coupling substance upon heating.
    Type: Grant
    Filed: October 27, 1989
    Date of Patent: December 25, 1990
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Mitsuo Akutsu, Syuji Iwakura, Keiji Tabata, Keiji Oya
  • Patent number: 4959173
    Abstract: An optically active ester of the formula ##STR1## wherein p is 0 or 1, q is 1 or 2, r is 1 or 2, q+r is 3, and s is 0 or 1. R.sub.1 and R.sub.2 in the above formula are each independently selected from the group consisting of C.sub.6-18 straight chain alkyl and an optically active group of the formula ##STR2## and in which m is 2 to 5, n is 1 or 2, X is hydrogen or chlorine, R.sub.3 is hydrogen or C.sub.1-11 straight chain alkyl, and C.sup.* represents a chiral carbon atom, with the proviso that when n is 1 and X is hydrogen, R.sub.3 is C.sub.1-11 straight chain alkyl. When q is 2 and r is 1 and R.sub.1 is C.sub.6-18 straight chain alkyl, p is 1; on the other hand, when q is 1 and r is 2 and R.sub.2 is an optically active group of the above formula, s is 1. One of R.sub.1 and R.sub.2 is an optically active group of the above formula, and the other of R.sub.1 and R.sub.2 is C.sub.6-18 straight chain alkyl.
    Type: Grant
    Filed: September 8, 1988
    Date of Patent: September 25, 1990
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Toshihiro Shibata, Norio Kurosawa, Masaki Kimura
  • Patent number: 4957953
    Abstract: A stabilized synthetic resin composition obtained by adding (1) 0.01 to 5 parts by weight of at least one monopiperidine compound represented by the following general formula (I): ##STR1## wherein R.sub.1 represents an alkyl group, an oxyl group or an acyl group, andR.sub.2 represents an aliphatic monoacyl group carrying 12 to 30 carbon atoms,and (2) 0.001 to 5 parts by weight of at least one polypiperidine compound having two or more tetramethylpiperidine groups represented by the following general formula (II) per molecule: ##STR2## to 100 parts by weight of a synthetic resin.
    Type: Grant
    Filed: November 30, 1989
    Date of Patent: September 18, 1990
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Kazumi Kikkawa, Hiroshi Takahashi
  • Patent number: 4957954
    Abstract: Polyvinyl chloride resin stabilizer compositions are provided, comprising a 2,2,6,6-tetramethyl piperidinyl compound and an ammonium or metal perchlorate; and also stabilized polyvinyl chloride resin compositions containing such stabilizers, and optionally including a plasticizer, and particularly as molded articles with polyurethane foam backing.
    Type: Grant
    Filed: January 25, 1989
    Date of Patent: September 18, 1990
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Shunichi Iizuka, Yoshiyuki Sakamaki, Noriyuki Shimoyama
  • Patent number: 4956407
    Abstract: A polymer composition comprises a polymer blend comprising a polyester and a polycarbonate or another polymer blend comprising alpha-methylstyrene-modified ABS resin and at least one polymer selected from a polycarbonate, a saturated polyester, polyphenylene ether, a polyamide and a polyacetal and an organic phosphite compound having the formula (I): ##STR1## in which R is an alkyl having 1 to 9 carbon atoms.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: September 11, 1990
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Kazushige Funasaki, Kenji Tajima, Toshinori Yukino, Hiroshi Yamanoi
  • Patent number: 4956488
    Abstract: The present invention discloses an optically active cyanobiphenyl compound represented by the following general formula: ##STR1## wherein, R is ##STR2## X is hydrogen atom or chlorine atom: when X is hydrogen atom, R.sub.1 is normal alkyl having from 1 to 11 carbon atoms and when X is chlorine atom, R.sub.1 is hydrogen atom or normal alkyl having from 1 to 11 carbon atoms; n is 3 to 5; Y is --CH.sub.2 --or --CO--; and * represents an asymmetric carbon atom.
    Type: Grant
    Filed: April 5, 1988
    Date of Patent: September 11, 1990
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Toshihiro Shibata, Masaki Kimura
  • Patent number: 4944980
    Abstract: An optical recording material having excellent light stability, shelf stability and solubility in a solvent comprises, as an indispensable constituent, a compound of the following general formula: ##STR1## wherein R represents a cycloalkyl group having 3 to 12 carbon atoms, X.sup.- represents a halide anion, a perchlorate anion or a quencher anion, rings A and B each represent a benzene or naphthalene ring which may be substituted with a halogen atom, and n represents 1 to 4.
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: July 31, 1990
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Mitsuo Akutsu, Syuji Iwakura, Keiji Oya