Kuraray Co., Ltd.

Konishi Co., Ltd.

Nippon Soda Co., Ltd.

Fumio Sanda

Takeshi Endo

Junichi Yamauchi

Shigeru Sasaki

Mitsuo Matsumoto

Masaki Okazaki

Toshikazu Takata

Hisakazu Horii

Kentaro Suzuki

Nobuki Matsuura

Hideo R&D Lab For High-Perf Materials Kubo

A one-pack moisture-curing epoxy resin composition which can be cured at ordinary temperatures and is improved in storage stability without impairing the quickness of curing, i.e., is excellent in two properties incompatible with each other. This composition includes one ore more members selected from the group consisting of vinyl carboxylates of the general formula (1) and epoxy-containing silyl compounds of the general formula (2), one or more members selected from the group consisting of ketimines and oxazolidines, and an epoxy resin. (1) [In the general formula (1), R, R, R, and Rare each independently hydrogen or an organic group; and n is an integer of 1 or above] (2) [In the general formula (2), Rand Rare each independently alkyl; Ris an epoxy-containing organic group; and n is an integer of 1 to 3]

One-pack moisture-curing epoxy resin composition

An asymmetric spiroorthocarbonate compound having one exomethylene group and represented by the following general formula (1) ##STR1## wherein A represents a group selected from the group consisting of: ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represents a hydrogen atom, a lower alkyl group having not more than 8 carbon atoms, an alkoxy group, a halogen group, a nitro group, a cyano group, an amino group, an amide group, a hydroxyl group or an alkyl ester group having not more than 20 carbon atoms; and R.sup.5, R.sup.6, R.sup.7 and R.sup.8, R.sup.9 through R.sup.14, R.sup.15 through R.sup.22, R.sup.23 through R.sup.28 and R.sup.29 through R.sup.36 each represents a hydrogen atom or a lower alkyl group having not more than 8 carbon atoms; and copolymers containing units therefrom.

Spiroorthocarbonate compound and copolymers obtained therefrom

Disposable moldings comprising a polymer (A) having a repeating structure unit in the main chain represented by the formula (I) ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are respectively a hydrogen atom or a lower alkyl, and a polymer composition comprising the polymer (A). The moldings of the present invention disintegrate themselves due to decomposition of the polymer (A) in atmosphere, soil or water and do not cause any environmental pollution.

Disposable moldings and polymer compositions for their production

Growing community of inventors

Kyoto, Japan

Fumio Sanda