Sanyo Chemical Industries, Ltd.

Shihei Motofuji

Takao Mukai

Atsushi Shiraishi

Megumu Sakakibara

Kenichiro Nakai

Itsuka Matsumoto

Kyosuke Michigami

Shintaro Higuchi

The present invention provides a raw material for bulk drugs and a pharmaceutical additive which provide excellent formulation stability and excellent over-time stability of drug efficacy when used to modify a bulk drug, a polypeptide, a bioactive protein, an enzyme, and the like. The present invention relates to a raw material for bulk drugs or a pharmaceutical additive, containing: a polyether composition (A) represented by formula (1), wherein the polyether composition (A) has a unimodal molecular weight distribution, the polyether composition (A) has a ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of 1.20 or less, and the polyether composition (A) contains a compound in which m is 1 in formula (1) in an amount of 90 wt % or more based on the weight of the polyether composition (A), in formula (1), OR, RO, RO, and RO are each independently a C2-C8 oxyalkylene group; when each of these moieties exists in the plural number, each OR, each RO, each RO, and each RO may be the same as or different from each other; these moieties may be bonded randomly or in block; a, b, c, and d are each independently an integer of 50 to 1200; Xto Xare each independently a hydrogen atom, a substituent represented by formula (2), or a substituent represented by formula (3); and m is an integer of 1 to 10. 

Starting material, for bulk drug or additives for drug, and bulk drug or drug using same

Provided is a photosensitive composition which can be cured with low energy consumption, even when a substance (such as a colorant) that attenuates or shades an illumination light is contained in a high concentration or even when the photosensitive composition is in the form of a thick film. Specifically provided is a photosensitive composition which comprises the following four components: (1) a radical initiator (A); (2) an acid generator (B) or a base generator (C); (3) a polymerizable substance (D); and (4) a colorant (E), a metal oxide powder (F), or a metal powder (G). Further, the photosensitive composition is characterized in that the radical initiator (A), the acid generator (B), and/or the base generator (C) generates an active species (H) through irradiation with an active ray of light; the active species (H) reacts the radical initiator (A), the acid generator (B), or the base generator (C) to form another species (I); and thus the polymerization of the polymerizable substance (D) by means of the active species (I) proceeds, said active species (H) or (I) being an acid or a base.

Photosensitive composition

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Kyoto, Japan

Shihei Motofuji