Decoloration of polyisocyanates containing isocyanurate and dire

Details Decoloration of polyisocyanates containing isocyanurate and dire Decoloration of polyisocyanates containing isocyanurate and dire

1997-05-19

1999-07-06

Anthony, Joseph D.

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 67, 528 73, 2521861, 540202, C08G 1874, C07D22900, C01B 1300

Patent

active

059198877

ABSTRACT:
A process for decoloring polyisocyanates containing isocyanurate and uretdione groups comprises treating the demonomerized polyisocyanates containing isocyanurate and uretdione groups with oxygen.

REFERENCES:
patent: 984221 (1911-02-01), Hornbostel
patent: 3086534 (1963-04-01), Gorter et al.
patent: 4935391 (1990-06-01), Caropreso et al.
patent: 4994541 (1991-02-01), Dell et al.
patent: 5143994 (1992-09-01), Laas et al.
patent: 5208334 (1993-05-01), Potter et al.
patent: 5237058 (1993-08-01), Laas et al.

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