Hodogaya Chemical Co., Ltd.

Fuji Photo Film Company, Limited

Nippon Electric Co., Ltd.

Oji Paper Co., Ltd.

Katsura Sangyo Co., Ltd.

Minoru Ozutsumi

Yoshihide Miyazawa

Akio Watanabe

Keiso Saeki

Masahiko Yamaguchi

Susumu Suzuka

Michihiro Gonda

Yoshitake Ohnishi

Shigeo Maeda

Takahiro Tsunoda

Satoshi Ogawa

Hidetoshi Komiya

Sadao Ishige

Hideaki Shinohara

Katsuichi Motohashi

Koichi Kashima

Toyohiko Yamaguchi

Masatake Kiritani

Masaru Morinaga

A sulfur-containing polymer having a repeating unit represented by the formula: ##STR1## where R is a straight or branched alkylene group having from 1 to 6 carbon atoms, R' is a straight or branched alkylene group having from 1 to 3 carbon atoms and p is an integer of from 0 to 10, and having an average molecular weight of from 500 to 10,000 and a sulfur content of from 15 to 65% by weight. The sulfur-containing polymer of the present invention is useful as a flame or smoke retarding agent in resin and rubber materials.

Sulfur-containing polyester and process for its production

A triphenylmethane compound represented by the formula (Ia) ##STR1## OR A MIXTURE THEREOF, WHEREIN R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and X are as defined hereinafter, useful as a color former.

Diphenyl-1,3-benzoxazine-2-ones

A mixture of a triphenylmethane compound represented by the formula (Ia) ##STR1## AND A TRIPHENYLMETHANE COMPOUND REPRESENTED BY THE FORMULA (Ib) ##STR2## WHEREIN R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and X are as defined hereinafter, useful as a color former.

Mixture of benzoxazines and benzodioxanes which may be used as color

A photosensitive color-forming element comprises a support and a photosensitive color-forming layer formed on said support and containing therein at least one photosensitive color-forming azido compound of the formula ##STR1## wherein [A] is a benzene ring or naphthalene ring, R.sub.1 and R.sub.2 each is a hydrogen or halogen atom or alkyl, alkoxyl, dialkylamino, acyl, acylamino, nitro or hydroxyl radical, and R.sub.3 is a hydrogen or halogen atom, or alkyl, alkoxyl, nitro, carboxyl, alkylcarboxyl, dialkylcarbamoyl, sulfonic acid, dialkylaminosulfonyl, alkylsulfonyl or acyl radical or a group of the formula (II), (III), (IV) or (V): ##STR2## in which formula X is an --O-- bonding or --NH-- bonding.

Photosensitive azido color-forming element

A photosensitive color-forming element comprises a support and a photosensitive color-forming layer carried on the support and containing therein a color-forming coupler, for example, 1-naphthol, 2-naphthol and 2,4-dichloro-1-naphthol, and a photosensitive azido compound of the formula (I) or (II): ##STR1## wherein R.sub.1 represents a hydrogen or halogen atom or an alkyl, alkoxyl, diethylamino or hydroxyl radical R.sub. 2 an alkyl, alkoxyl or hydroxyl radical, and R.sub.3 a hydrogen atom or an alkyl or phenyl radical, and, if necessary, a polymeric material capable of hardening or being insolubilized in solvent when the polymeric material is exposed to radiation rays in the presence of the above azido compound, the above-mentioned azido compound and color-forming coupler being capable of forming a dark color upon exposure to radiation rays, without a color-developing agent.

Photosensitive azide compound containing color-forming element

A lactone compound represented by the following formula ##STR1## or ##STR2## or a mixture thereof, wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and A are as defined hereinafter and a process for preparing the same are disclosed.

Tetrahydroquinoline or jujolidine derivative of a lactone compound of

A pressure-sensitive copying paper comprising an adsorbent solid acid and a microencapsulated color former capable of forming a distinct color when reacted with the adsorbent acid coated on the same or a different surface of a support or supports, the microencapsulated color former being at least one fluoran compound represented by the formula; ##STR1## WHEREIN R.sub.1, R.sub.2, Z, m and ##STR2## are as defined hereinafter, is disclosed.

Fluoran compounds

A liquid crystal composition having a homogeneous alignment of the liquid crystalline molecules, comprises a liquid crystal material, for example, nematic, smectic and cholesteric liquid crystal substances, an additive effective for forming the homogeneous alignment, said additive consisting of at least one heterocyclic compound having a five or six-membered heterocyclic ring containing therein at least one atomic group selected from the class consisting of the atomic group of the formulae; ##EQU1## wherein X is a hydrogen atom or substituted or unsubstituted phenyl radical, and at least one atomic group of the formula: ##EQU2## Y, wherein Y represents an oxygen or sulfur atom, said heterocyclic compounds being different from indigo, and, if necessary, a supplementary additive effective for enhancing the dynamic scattering property of the liquid crystal material, said supplementary additive consisting of at least one substance selected from the class consisting of

Liquid crystal composition

A liquid crystal composition having long-life dynamic light scattering properties under application of DC or AC voltage, comprising (1) at least one liquid crystalline substance selected from the group consisting of nematic and cholesteric, and (2) at least one additive selected from the group consisting of (A) mixtures of at least one first organic cyclic compound selected from the group consisting of quinone compounds, quinoneimine compounds, imino compounds, desoxybenzoin compounds, dibenzyl methane compounds and triphenyl methane compounds, with at least one second organic cyclic compound selected from the group consisting of hydroquinone compounds, aromatic amino compounds, heterocyclic amino compounds and alicyclic amino compounds, and (B) aromatic, heterocyclic and alicyclic compounds having at least one radical selected from the group consisting of carbonyl and imino radicals and at least one radical selected from the group consisting of hydroxyl and amino radicals.

A pressure-sensitive copying material comprising a support having thereon a microencapsulated color former capable of forming a distinct color when reacted with an electron-accepting solid, the microencapsulated color former comprising at least one benzoxazine derivative represented by the formula (Ia) ##SPC1## , a benzodioxane derivative represented by the formula (Ib) ##SPC2## And a mixture thereof, wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and X are as defined hereinafter.

Pressure-sensitive copying material

A pressure-sensitive copying paper comprising an adsorbent solid acid and a microencapsulated color former capable of forming a distinct color when reacted with the adsorbent acid coated on the same or a different surface of a support or supports, the microencapsulated color former being at least one lactone compound of a pyridine-carboxylic acid represented by the formula ##SPC1## Or a mixture thereof, wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and A are as defined hereinafter, is disclosed.

Pressure-sensitive copying paper containing lactone compounds of

A pressure-sensitive copying paper comprising an adsorbent solid acid and a microencapsulated color former capable of forming a distinct color when reacted with the adsorbent acid coated on the same or a different surface of a support or supports, the microencapsulated color former being at least one lactone compound derived from a pyridine-carboxylic acid represented by the formula ##SPC1## Or a mixture thereof, wherein R.sub.1, R.sub.2, R.sub.3 and the partial structure ##SPC2## Are as defined hereinafter, is disclosed.

Growing community of inventors

Tokyo, Japan

Minoru Ozutsumi