Method of treating urethane resin, composition for recycling same, and regeneration method
AssigneeKABUSHIKI KAISHA TOSHIBA, Tokyo, Japan
InventorsTaro Fukaya, Cao Minh Thai, Shioko Saya
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Abstract
Disclosed is a method of adding a compound having at least one group selected from the group consisting of a carboxyl group, salts thereof, esters thereof and haloformyl groups or an acid anhydride, as a treating agent, to a resin decomposed substance prepared by decomposing a urethane bond of a urethane resin, and adding an epoxy resin or isocyanate compound to the product, to regenerate the resin. According to the present invention, reaction activity in producing a regenerated resin from a urethane resin decomposed substance is appropriately suppressed, and thus regeneration of a urethane resin can be carried out by easy procedures.
Claims16
A method of treating a urethane resin, comprising:
- decomposing a urethane bond of the urethane resin to obtain a resin decomposed substance, and
- adding a treating agent to the resin decomposed substance, the treating agent being an acid anhydride or a compound having at least one group selected from the group consisting of a carboxyl group, salts thereof, esters thereof and haloformyl groups.
A composition for recycling a urethane resin, comprising a reaction product obtainable by reacting an amino group contained in a resin decomposed substance with a treating agent, wherein the resin decomposed substance is an intermediate product prepared by decomposing a urethane bond in the urethane resin, and the treating agent is an acid anhydride or a compound having at least one group selected from the group consisting of a carboxyl group, salts thereof, esters thereof, and haloformyl groups.
A method of regenerating a resin from a urethane resin, comprising:
- decomposing a urethane bond in the urethane resin to obtain a resin decomposed substance;
- adding a treating agent to the resin decomposed substance, to obtain a composition for recycling, the treating agent being an acid anhydride or a compound having at least one group selected from the group consisting of a carboxyl group, salts thereof, esters thereof, and haloformyl groups;
- and
- adding an epoxy resin or isocyanate compound to the composition for recycling, to regenerate a resin.
Dependencies are inferred from the claim text.