Polymeric MDI color

Details Polymeric MDI color Polymeric MDI color

1997-11-20

1999-08-24

Gorr, Rachel

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

560332, 564 5, 564 6, 564334, C08G 1876

Patent

active

059421517

ABSTRACT:
A process for the production of polymethylene polyphenyl polyisocyanates is disclosed. The process comprises phosgenating the corresponding polyamines in solution in an inert organic solvent, removing excess phosgene, and stripping the solvent, the improvement wherein at least 0.00015 percent by weight of hydrazine or hydrazine derivative per 100 percent by weight of polyamine are added to the polyamines at any time prior to the stripping step.

REFERENCES:
patent: 1973724 (1934-09-01), Perkins
patent: 3253031 (1966-05-01), Powers
patent: 3260751 (1966-07-01), Powers et al.
patent: 3277139 (1966-10-01), Powers
patent: 3277173 (1966-10-01), Powers et al.
patent: 3362979 (1968-01-01), Bentley
patent: 3496229 (1970-02-01), Powers et al.
patent: 3517062 (1970-06-01), Powers
patent: 3641094 (1972-02-01), Arlt et al.
patent: 3912600 (1975-10-01), Hatfield, Jr. et al.
patent: 4259526 (1981-03-01), Dunlap et al.
patent: 4792624 (1988-12-01), Hatfield, Jr. et al.
patent: 5312971 (1994-05-01), Adkins et al.

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