Process for coloring polyurethane foams

Details Process for coloring polyurethane foams Process for coloring polyurethane foams

1976-07-09

1979-01-02

Cockeram, H.S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

8 4, 8178E, 8DIG7, 252182, 260 37N, 427195, 427243, 427385R, 428306, 428425, 521 51, 521919, 521920, C08G 1814, C08G 1838

Patent

active

041328400

ABSTRACT:
Polyurethane plastics are dyed with dyestuffs of the formula ##STR1## wherein R.sub.1 denotes hydrogen, halogen, optionally substituted C.sub.1 -C.sub.4 -alkyl, optionally substituted C.sub.1 -C.sub.4 -alkoxy and optionally substituted C.sub.1 -C.sub.4 -alkylcarbonylamino and R.sub.2 denotes hydrogen, optinally substituted C.sub.1 -C.sub.4 -alkyl and optionally substituted C.sub.1 -C.sub.4 -alkoxy, while A and B denote optionally branched alkylene chains which can be identical or different and preferably have 2 to 6 carbon atoms, with formation of covalent bonds, in that the dyestuffs are added before or during the polyaddition reaction to the reacton mixture of polyol and polyisocyanate or to one of the components.

REFERENCES:
patent: 2206108 (1940-07-01), Mueller et al.
patent: 2798090 (1957-07-01), Krell et al.
patent: 3137671 (1964-06-01), Bosshard et al.
patent: 3326960 (1967-06-01), Weaver et al.
patent: 3928292 (1975-12-01), Maeda et al.
patent: 3970601 (1976-07-01), Weber et al.
Venkataraman-Chemistry of Synthetic Dyes, vol. III, Academic Press, N.Y., (1970), pp. 449-452.
Griffiths-Colour & Constitution of Organic Molecules, Academic Press, N.Y., (1976), pp. 169-171.

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