Base and solvent-decomposed molding of thermosetting resin and aliphatic polyester
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTakahiko Terada, Hiroshi Onishi
Life of this patent
Estimating the term…
Abstract
The thermosetting composition of the present invention includes an unsaturated polyester, an addition polymerizable monomer, a low shrink agent other than an aliphatic polyester, and an aliphatic polyester decomposed in a decomposing solution containing a base and at least one solvent selected from the group consisting of water, methanol, ethanol, and ethylene glycol at a temperature lower than a boiling point of the decomposing solution after being cured.
Claims9
A thermosetting composition comprising a thermosetting resin and an aliphatic polyester, wherein decomposition of the thermosetting composition is promoted by decomposition of the aliphatic polyester in a decomposing solution containing at least a base from about 0.1 to about 50% by weight of at least one base selected from the group consisting of alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal oxides, alkaline earth metal oxides, alkali metal alkoxides and alkaline earth metal alkoxides;
- and at least one solvent selected from the group consisting of water, methanol, ethanol or ethylene glycol after the thermosetting composition is cured.
A molding compound comprising as a binder a thermosetting composition containing a thermosetting resin and an aliphatic polyester,
- wherein decomposition of the thermosetting composition is promoted by decomposition of the aliphatic polyester in a decomposing solution containing at least a base from about 0.1 to about 50% by weight of at least one base selected from the group consisting of alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal oxides, alkaline earth metal oxides, alkali metal alkoxides and alkaline earth metal alkoxides;
- and at least one solvent selected from the group consisting of water, methanol, ethanol or ethylene glycol after the thermosetting composition is cured.
A method for decomposing a thermosetting composition, comprising the step of soaking a cured thermosetting composition in a decomposing solution containing a base from about 0.1 to about 50% by weight of at least one base selected from the group consisting of alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal oxides, alkaline earth metal oxides, alkali metal alkoxides and alkaline earth metal alkoxides;
- and at least one solvent selected from the group consisting of water, methanol, ethanol, and ethylene glycol,
- wherein the thermosetting composition contains at least an aliphatic polyester and a thermosetting resin.
A method for decomposing a molding compound containing as a binder a thermosetting composition, comprising the step of soaking the molding compound in a decomposing solution containing a base from about 0.1 to about 50% by weight of at least one base selected from the group consisting of alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal oxides, alkaline earth metal oxides, alkali metal alkoxides and alkaline earth metal alkoxides;
- and at least one solvent selected from the group consisting of water, methanol, ethanol, and ethylene glycol,
- wherein the thermosetting composition contains at least an aliphatic polyester and a thermosetting resin.
Dependencies are inferred from the claim text.