Patents Assigned to Adeka Argus Chemical Co., Ltd.
  • Patent number: 4937348
    Abstract: A process is provided for preparing 2,2'-methylene-bis-(4-hydrocarbyl-6-benzotriazolyl-phenols) having formula III: ##STR1## wherein: R is selected from the group consisting of alkyl having from one to about twelve carbon atoms; arylalkyl having from seven to about fourteen carbon atoms and cycloalkyl having from three to about twelve carbon atoms;X is selected from the group consisting of hydrogen, halogen, alkyl having from one to about twelve carbon atoms, aryl having from six to ten carbon atoms, arylalkyl having from seven to about sixteen carbon atoms, alkoxy having from one to about twelve carbon atoms, aryloxy having from six to ten carbon atoms; and arylalkoxy having from seven to about sixteen carbon atoms;R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen; alkyl having from one to about six carbon atoms, and R.sub.1 and R.sub.2 taken together to form a four to six member heterocyclic ring including a nitrogen atom; provided, that at least one of R.sub.1 and R.sub.
    Type: Grant
    Filed: December 29, 1987
    Date of Patent: June 26, 1990
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventor: Naohiro Kubota
  • Patent number: 4917828
    Abstract: A process for preparing ketocholanate(s) comprises oxidizing cholanic acid compound(s), such as alkyl 3.alpha.-alkoxycarbonyloxy-7.alpha.,12.alpha.- dihydroxycholanates or alkyl 3.alpha.-acyloxy-7.alpha.,12.alpha.-dihydroxycholanates, with an alkali metal salt of an oxo acid of halogen in the presence of a cerium compound. Ketocholanate(s) such as alkyl 3.alpha.-alkoxycarbonyloxy-7,12-dioxocholanataes, alkyl 3.alpha.-alkoxycarbonyloxy- 7-oxo-12.alpha.-hydroxycholanates, alkyl 3.alpha.-acyloxy-7,12-dioxocholanates, alkyl 3.alpha.-alkoxycarbonyloxy-12- oxocholantes, alkyl 3.alpha.-acyloxy-7-oxo-12.alpha.-hydroxycholanates and mixtures thereof are thus produced.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: April 17, 1990
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventor: Naohiro Kubota
  • Patent number: 4918046
    Abstract: A heat-sensitive recording material which comprises a usually colorless or light-colored coloring material together with one or more compounds selected from among bissulfonate compounds, 2-substituted cyclohexyl sulfonate derivatives and biscycloalkyl aryldisulfonate derivatives.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: April 17, 1990
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Mitsuo Akutsu, Syuji Iwakura, Keiji Oya, Keiji Tabata
  • Patent number: 4912156
    Abstract: A polyolefin composition comprises 100 parts by weight of a polyolefine which has been produced with use of a Ziegler catalyst and has a part or residue of the catalyst left therein, 0.005 to 1 part by weight of a phenol compound having the formula (I) and 0.005 to 1 part by weight of an organic phosphite compound having the formula (II). ##STR1## in which R is a residue group of an alcohol being monohydric, dihydric, trihydric or terahydric, R1 is methyl or tert.-butyl, R2 is an alkyl, --CH2CH2COOR3 or --COOR3, R3 being an alkyl, an aryl or an alkylaryl, and n is a number of 1 to 4.
    Type: Grant
    Filed: July 27, 1988
    Date of Patent: March 27, 1990
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Masaki Yagi, Tohru Haruna, Takashi Takeuchi, Toshinori Yukino
  • Patent number: 4910238
    Abstract: Stabilizers for synthetic polymer compositions are provided which are poly(2,2,6,6-tetramethyl piperidyl amino)-1,3,5-triazines having the formula: ##STR1## in which: R is selected from the group consisting of hydrogen; alkyl, alkenyl, cycloalkyl, hydroxyalkyl and alkoxy having from one to about twelve carbon atoms; acyl having from the one to about twelve carbon atoms; and oxyl;X and Y are each selected from the group consisting of ##STR2## wherein: R.sub.1 is selected from the group consisting of alkyl, hydroxylalkyl and alkylenealkoxy having from one to about twelve carbon atoms; cycloalkyl having from three to about twelve carbon atoms; and aryl having from six to about eighteen carbon atoms;R.sub.2 and R.sub.3 are selected from the group consisting of hydrogen; alkyl having from one to about twelve carbon atoms; cycloalkyl having from three to about twelve carbon atoms; and aryl having from six to about eighteen carbon atoms; and R.sub.2 and R.sub.
    Type: Grant
    Filed: July 10, 1986
    Date of Patent: March 20, 1990
    Assignee: Adeka Argus Chemical Co. Ltd.
    Inventors: Yutaka Nakahara, Etsuo Tobita
  • Patent number: 4908400
    Abstract: A plasticizer for chloroprene rubber represented by the following general formula (I):R.sub.1 (O--R).sub.m S(R--O).sub.n R.sub.2 (I)wherein R.sub.1 and R.sub.2 independently represent each a saturated or unsaturated aliphatic monoacyl group having 4 to 24 carbon atoms;R represents an alkylene group having two to four carbon atoms; andm and n represent each an integer of 1 to 4:is disclosed.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: March 13, 1990
    Assignees: Du Pont-Showa Denko Co., Ltd., Adeka Argus Chemical Co., Ltd.
    Inventors: Yasushi Hirose, Kenji Iijima, Humihiro Kashima, Naoyasu Kurita, Koji Tajima, Hiroshi Hondou
  • Patent number: 4898688
    Abstract: Stabilizers for synthetic polymer compositions are provided which are poly(2,2,6,6-tetramethyl piperidyl amino)-1,3,5-triazines having the formula: ##STR1## in which: R is selected from the group consisting of hydrogen; alkyl, alkenyl, cycloalkyl, hydroxyalkyl and alkoxy having from one to about twelve carbon atoms; acyl having from about one to about twelve carbon atoms; and oxyl;X and Y are each selected from the group consisting of ##STR2## wherein: R.sub.1 is selected from the group consisting of alkyl, hydroxyalkyl and alkylenealkoxy having from one to about twelve carbon atoms; cycloalkyl having from three to about twelve carbon atoms; and aryl having from six to about eighteen carbon atoms;R.sub.2 and R.sub.3 are selected from the group consisting of hydrogen; alkyl having from one to about twelve carbon atoms; cycloalkyl having from three to about twelve carbon atoms; and aryl having from six to about eighteen carbon atoms; and R.sub.2 and R.sub.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: February 6, 1990
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Yutaka Nakahara, Etsuo Tobita
  • Patent number: 4894400
    Abstract: Synthetic polymer compositions comprise 100 parts by weight of a synthetic polymer and 0.001 to 5 parts by weight of a benzotriazol compound, and thus possesses improved stability.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: January 16, 1990
    Assignee: Adeka Argus Chemical Co. Ltd.
    Inventors: Tohru Haruna, Masayuki Takahashi, Kazunori Nishikawa
  • Patent number: 4889672
    Abstract: The process for producing a ceramic molding of the present invention comprises adding 0.1 to 20 parts by weight of an adduct of epoxidized polybutadiene with an organic amine to 100 parts by weight of a ceramic powder.
    Type: Grant
    Filed: February 2, 1988
    Date of Patent: December 26, 1989
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Mitsuo Akutsu, Keiji Tabata
  • Patent number: 4888371
    Abstract: Bis(2,6-di tert butyl-4-branched propyl or butyl phenyl)-pentaerythritol spiro phosphites are provided having the formula: ##STR1## wherein R is a branched propyl or butyl group, such as isopropyl, iso-butyl, or sec-butyl, as well as synthetic resin compositions having enhanced resistance to deterioration upon exposure to the heat and light comprising such as bis(2,6-di-t-butyl-4-branched propyl or butyl phenyl)pentaerythritol spiro phosphites.
    Type: Grant
    Filed: November 13, 1987
    Date of Patent: December 19, 1989
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Kenji Tajima, Tetsuo Tsuboi, Ryozo Arata
  • Patent number: 4885323
    Abstract: Poly-2,2,6,6-tetramethyl piperidyl amino spiro glycol ether-1,3,5-triazines are provided having the formula: ##STR1## in which: R is selected from the group consisting of hydrogen, alkyl having from one to about eighteen carbon atoms, hydroxyalkyl having from two to about six carbon atoms; epoxyalkyl having from three to about eight carbon atoms; alkylaryl having from seven to about eighteen carbon atoms; acyl having from two to about eight carbon atoms; and oxyl;each of R.sub.1 and R.sub.2 is selected from the group consisting of hydrogen, alkyl having from one to about eighteen carbon atoms; and alkylene forming a heterocyclic ring including the nitrogen atom in the ring and having from four to seven carbon atoms and no or one oxygen atom; andn is a number from 2 to about 40 representing the average number of units enclosed by the brackets;and synthetic resin compositions containing the same as light stabilizers.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: December 5, 1989
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Motonobu Minagawa, Yutaka Nakahara, Toshihiro Shibata, Etsuo Tobita
  • Patent number: 4885326
    Abstract: A synthetic resin composition comprises 100 parts by weight of a synthetic resin, 0.001 to 10 parts by weight of a cyclic alkylphosphite compound of 2,2'-alkylidene-bisphenol (I) and 0.001 to 10 parts by weight of beta-(3,5-dialkyl-4-hydroxyphenyl)-propionic acid ester (II) and is stabilized to light and heat.
    Type: Grant
    Filed: March 24, 1989
    Date of Patent: December 5, 1989
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Tohru Haruna, Kazunori Nishikawa, Mitsuhiro Hamajima
  • Patent number: 4866199
    Abstract: An optically active ester compound is provided represented by the following general formula: ##STR1## wherein R.sub.1 is a normal alkyl group having from 6 to 18 carbon atoms; m is zero or one, n is zero or one, and m+n is one or two; X is --CO--O-- or --O--CO--; p is 3 to 6; Y is a hydrogen atom or chlorine atom; R.sub.2 is hydrogen or a normal alkyl group having from 1 to 11 carbon atoms but may be a hydrogen atom only when Y is a chlorine atom; and *C represents an asymmetric carbon atom. The ester compound of the present invention is useful as a ferroelectric liquid crystal compound.
    Type: Grant
    Filed: March 8, 1988
    Date of Patent: September 12, 1989
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Toshihiro Shibata, Masaki Kimura, Norio Kurosawa
  • Patent number: 4844836
    Abstract: The present invention discloses an optically active cyanobiphenyl compound represented by the following formula and nematic liquid crystal composition comprising thereof. ##STR1## wherein, m is 2 or 3; n is 2 when m is 2 and n is one when m is 3; and * represents an asymmetric carbon atom.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: July 4, 1989
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Toshihiro Shibata, Norio Kurosawa
  • Patent number: 4831143
    Abstract: The present invention discloses an optically active pyrimidine compound represented by the following general formula: ##STR1## wherein m is 3 to 14n is 4 to 18; p is 3 to 5; and*C represents an asymmetric carbon atom.The pyrimidine compound of the present invention is a liquid crystal compound useful as an electrooptic element wherein the response of the ferroelectric liquid crystal to an electric field is utilized.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: May 16, 1989
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Toshihiro Shibata, Masaki Kimura, Norio Kurosawa
  • Patent number: 4822522
    Abstract: Hindered phenol amides are provided having the following formula: ##STR1## wherein: R.sub.1 and R.sub.2 are hydrogen or lower alkyl having from one to four carbon atoms;m.sub.1 and m.sub.2 are 0 or 1; andn.sub.1 and n.sub.2 are selected from 1, 2 and 3; as well as stabilizer compositions for synthetic polymers and synthetic polymer compositions containing such hindered phenol amides.
    Type: Grant
    Filed: August 26, 1987
    Date of Patent: April 18, 1989
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Kenji Tajima, Takao Nishina, Kazunori Nishikawa
  • Patent number: 4820844
    Abstract: A radiation sensitizer of the present invention contains a particular nitrotriazole compound as an active ingredient and accelerates inactivation of intractable hypoxic cells in a malignant tumor by irradiation.
    Type: Grant
    Filed: August 12, 1986
    Date of Patent: April 11, 1989
    Assignees: Adeka Argus Chemical Co., Ltd., Kyoto University
    Inventors: Tsutomu Kagiya, Motonobu Minagawa, Yutaka Nakahara, Ryoji Kimura, Tsuneo Tsubakimoto, Ryoichi Oshiumi, Koichi Sakano
  • Patent number: 4812498
    Abstract: Polycarbonate resin compositions are provided having improved light stability and comprising an alkylidene bis(benzotriazolyl phenol)having the formula: ##STR1## wherein: R.sub.1 is selected from the group consisting of hydrogen and alkyl having from one to about eleven carbon atoms;R.sub.2 is selected from the group consisting of alkyl having from one to about twelve carbon atoms; and arylalkyl having from seven to about eighteen carbon atoms; andX is selected from the group consisting of hydrogen; halogen; alkyl having from one to about twelve carbon atoms; aryl alkyl having from seven to about eighteen carbon atoms; alkoxy having from one to about twelve carbon atoms; phenoxy; arylalkoxy having from seven to about eighteen carbon atoms; and phenyl.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: March 14, 1989
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Yutaka Nakahara, Atsushi Nishimura, Toshio Nakajima
  • Patent number: 4804759
    Abstract: The present invention discloses an optically active pyrimidine compound represented by the following general formula: ##STR1## wherein, a is 2 or 3, b is 2 or 3 and a+b=5; m is 4 to 18; and C represents an asymmetric carbon atom.The pyrimidine compound of the present invention is a liquid crystal compound useful as an electrooptic element wherein the response of the ferroelectric liquid crystal to an electric field is utilized.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: February 14, 1989
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Toshihiro Shibata, Norio Kurosawa
  • Patent number: 4798836
    Abstract: Bis-(2,2,6,6-tetramethyl-piperidyl)diimides are provided, having the formula: ##STR1## in which R is selected from the group consisting of hydrogen; oxyl; alkyl and alkenyl having from one to about eighteen carbon atoms; epoxy and hydroxyalkyl having from two to about eight carbon atoms; acyl having from two to about eight carbon atoms; and phenalkyl having from seven to about twelve carbon atoms; and Z is a tetravalent aliphatic or cycloaliphatic hydrocarbon group having from two to about eighteen carbon atoms; and stabilizer and synthetic polymer compositions containing such diimides having improved resistance to deterioration when exposed to light.
    Type: Grant
    Filed: October 26, 1987
    Date of Patent: January 17, 1989
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Motonobu Minagawa, Yutaka Nakahara, Bunji Hirai, Kazuo Sugibuchi