Aqueous dispersion of polyurethane resins, a method of manufactu

Details Aqueous dispersion of polyurethane resins, a method of manufactu Aqueous dispersion of polyurethane resins, a method of manufactu

1996-02-05

1997-08-19

Niland, Patrick

Coating processes

With post-treatment of coating or coating material

Heating or drying

4273855, 4273884, 524591, 524839, 524840, 524507, 524539, B05D 302, C08J 300, C08K 320, C08L 7500

Patent

active

056586175

ABSTRACT:
A method of manufacturing aqueous dipsersion of polyurethane resins free from urea groups and containing ionic groups and suitable for coating agents, with a number average moleculear weight (Mn) of 10,000 to 300,000 and an acid number of 5 to 50, by preparing a polyurethane prepolymer containing OH groups and with an OH number of 5 to 75 and a number average molecular weight (Mn) of 5,000 to 50,000.

REFERENCES:
patent: 4794147 (1988-12-01), Savino et al.
patent: 5331039 (1994-07-01), Blum et al.
patent: 5342882 (1994-08-01), Gobel et al.

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