Nicca Chemical Co., Ltd.

Sanko Co., Ltd.

Hiroshi Sumitomo

Shigeru Oda

Eiji Kawabata

Toru Makino

Yoshito Nakagawa

Koji Midori

Hirotaka Kinoshita

Takaaki Mori

Kenichi Ikemoto

Tjang Kie Tan

Takao Yamashita

The invention provides a heat-sensitive recording material, which is highly sensitive, is almost free of staining on the background, and gives a recorded image excellent in stability during storage, by using a finely divided sensitizer dispersion excellent in shelf stability produced in a short time with high volumetric efficiency. The invention relates to a method of producing a sensitizer dispersion, which comprises emulsifying and finely dividing a heat-sensitive recording sensitizer by melting under heating in an aqueous emulsifying dispersant, and then crystallizing the finely divided emulsified dispersion under rapid cooling, wherein the sensitizer is at least one member selected from the group consisting of 1,2-bis(phenoxy)ethane, 1,2-bis(3-methylphenoxy)ethane, 1,2-bis(4-methylphenoxy)ethane, p-benzylbiphenyl, di-p-methylbenzyl oxalate, and &#x3b2;-naphthyl benzyl ether.

Method for producing material containing sensitizer dispersed therein for thermal recording article and a thermal recording article

The flame retardant treating agent of the invention comprises a phosphorus-based compound represented by the following formula (4), for example.According to the invention, a polyester fiber woven fabric is immersed in a treatment solution containing the flame retardant treating agent and is heat treated at a prescribed temperature in order to fix the flame retardant treating agent to the polyester fiber woven fabric to obtain flame retardant treated fiber. As a result, it is possible to maintain adequate fiber cleaning durability and achieve a sufficient flame retardant property even by post-treatment, without using halogen-based compounds.

Flame retardant treating agents, flame retardant treating process and flame retardant treated fibers

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Ibaraki, Japan

Hiroshi Sumitomo