Process for the preparation of recyclate polyols having a low am

Details Process for the preparation of recyclate polyols having a low am Process for the preparation of recyclate polyols having a low am

1996-10-28

1998-06-09

Geist, Gary

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568852, 568869, 568871, C07C 3118, C07C 2726

Patent

active

057636923

ABSTRACT:
A process for preparing a recyclate polyol obtained from glycolysis of polyurethanes and/or polyurea-polyurethanes comprises reacting scrap polyurethane and/or polyurea-polyurethane with a short-chain compound containing at least 2 OH groups in the presence of a catalyst and admixing a cyclic carbonate. The process results in a recyclate polyol having a low primary aromatic amine content which may be used to produce cellular or non-cellular polyurethanes, polyurea-polyurethanes, or polyisocyanurates.

REFERENCES:
patent: 5300530 (1994-04-01), Machado et al.
patent: 5357006 (1994-10-01), Gassan et al.
patent: 5410008 (1995-04-01), Bauer et al.
patent: 5508312 (1996-04-01), Munzmay et al.
Organic Carbonates--Chem. Rev. 1996, 96, 951-976.

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