Process for the preparation of liquid mixtures of compounds havi

Details Process for the preparation of liquid mixtures of compounds havi Process for the preparation of liquid mixtures of compounds havi

1981-08-26

1982-11-02

Torrence, Dolph H.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

260453SP, 521 53, 528 67, C08G 1882, C07C119042

Patent

active

043572553

ABSTRACT:
Waste polyurethane materials are made re-usable by converting them to liquid mixtures. Such liquid mixtures are made by reacting up to 70 parts by weight of polyurethane with a low-melting polyisocyanate at 100.degree. to 250.degree. C. in the presence of a catalyst. Suitable catalysts include the acid and neutral salts, phenolates, enolates and alcoholates of a metal of the 3rd, 4th or 5th Main Group or 1st, 2nd, 4th, 7th or 8th subgroup of the Periodic System of elements. The thus-produced mixtures contain isocyanates and are suitable as an isocyanate component in the production of polyurethane plastic materials.

REFERENCES:
patent: 3109824 (1963-11-01), Heiss
patent: 3123577 (1964-03-01), Heiss
patent: 3738946 (1973-06-01), Frulla et al.
patent: 4014809 (1977-03-01), Kondo et al.
patent: 4025559 (1981-05-01), Johnson
patent: 4328368 (1982-05-01), Salloum et al.
Patents Abstracts of Japan, Band 4, No. 38, Mar. 27, 1980, p. 88C4.

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