Method and composition for reclaiming polyurethane

Details Method and composition for reclaiming polyurethane Method and composition for reclaiming polyurethane

1976-07-01

1979-07-31

De Benedictis, Sr., Thomas

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 334UB, 260 336UB, 260 338UB, 528 76, 528 85, 521163, 521167, C08J 1100, C08G 1800

Patent

active

041629957

ABSTRACT:
Decomposiing polyurethane foams by treating such polyurethane materials with ammonia or ammonium hydroxide, preferably in the presence of a suitable organic solvent such as a glycol or polyol, or the decomposition product of a polyurethane. Treatment of the polyurethane material with ammonia or ammonium hydroxide, particularly in combination with such solvent, is carried out preferably at elevated temperature, and results in decomposition of the polyurethane. The resulting reaction product containing polyol fragments from such decomposition or depolymerization, can be incorporated with fresh polyurethane reactants, including polyisocyanate, or polyol and polyisocyanate, to produce new urethane polymer, thus permitting recovery and re-use of otherwise useless scrap polyurethane materials.

REFERENCES:
patent: 3300417 (1967-01-01), McElroy
patent: 3404103 (1968-10-01), Matsudaira et al.
patent: 3708440 (1973-01-01), Frulla et al.
patent: 3928253 (1975-12-01), Thornton et al.

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