Process for polymerizing isocyanates

Details Process for polymerizing isocyanates Process for polymerizing isocyanates

1997-08-01

1998-06-23

Gorr, Rachel

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 73, C08G 1822

Patent

active

057706719

ABSTRACT:
Isocyanates are polymerized in a simple manner by polymerizing aliphatic and/or aromatic isocyanates in the presence of metallocenes at temperatures from 20.degree. to 220.degree. C., optionally subject to increased or reduced pressure and optionally in the presence of an inert organic solvent, the metallocene being used in an amount of 5 to 50,000 ppm relative to the amount of isocyanates used.

REFERENCES:
patent: 4861806 (1989-08-01), Rembold et al.
patent: 5102918 (1992-04-01), Moriya
Ullmanns Encyklopadie der technischen Chemie, 4, Aufl., Bd. 16, (month unavailable) 1978, pp. 598-604.

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