Arakawa Kagaku Kogyo Kabushiki Kaisha

Arakawa Chemical Industries, Ltd.

Seiichi Tsuchida

Yoshihiro Kodama

Kohtaro Matsuo

Hiroari Hara

Tsukasa Ishimoto

Process for preparing liquid rosin ester with anthraquinone and alkali

Pressure-sensitive adhesive compositions

Hot-melt adhesive compositions comprising a partially (fumarized and/or

A process for preparing a stabilized rosin ester having a higher softening point which comprises subjecting a rosin to disproportionation and purification, and esterifying the resulting purified disproportionated rosin with a tri- or more valent polyhydric alcohol to give a rosin ester having a softening point (according to ring and ball method) of 65.degree. to 140.degree. C. The resulting rosin ester has superior heat resistance and aging resistance as well as a high softening point and is suitably employed as a tackifier for pressure-sensitive adhesive compositions and hot-melt compositions.

Stabilized rosin ester and pressure-sensitive adhesive and hot-melt

Process for preparing stabilized rosin ester, and pressure-sensitive

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Sakai, Japan

Seiichi Tsuchida