Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1979-09-24
1981-09-29
Pertilla, Theodore E.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 292EP, 260 294R, 260 296NR, 4284234, C08L 7512
Patent
active
042922267
ABSTRACT:
This invention relates to a new process for the production of aqueous dispersions or solutions of polyurethane-polyureas by reacting NCO-prepolymers which have been hydrophilically modified and/or which contain external emulsifiers with organic polyamines and/or hydrazines in the aqueous phase, the above-mentioned chain extenders - in the form of their solid adducts with inorganic or organic acids - being mixed with the NCO-prepolymers to form a suspension before production of the dispersion or solution. The invention also relates to the dispersions or solutions obtainable by this process and to their use for the production of coatings or bonds.
REFERENCES:
patent: 3437624 (1969-04-01), Dawn et al.
patent: 3479310 (1969-11-01), Dieterich et al.
patent: 3499872 (1970-03-01), Thoma et al.
patent: 3607837 (1971-09-01), Reegen
patent: 3756992 (1973-09-01), Dieterich
patent: 4094842 (1978-06-01), Wenzel et al.
patent: 4108814 (1978-08-01), Reiff et al.
patent: 4147679 (1979-04-01), Scriven et al.
D. Dieterich et al, Angew. Chem. 82, 53 (1970).
Meckel Walter
Wenzel Wolfgang
Bayer Aktiengesellschaft
Harsh Gene
Pertilla Theodore E.
Pope Lawrence S.
Roy Thomas W.
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