Polycarbonate polyol, aromatic polycarbonate polyurethane resin,

Details Polycarbonate polyol, aromatic polycarbonate polyurethane resin, Polycarbonate polyol, aromatic polycarbonate polyurethane resin,

1989-06-20

1991-09-03

Kight, III, John

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 71, 528 72, 528 74, 528 85, 528370, 528 53, 524 81, 524196, 525461, C08G 1844, C09D17506

Patent

active

050456229

ABSTRACT:
A polycarbonate polyol having a main chain of the formula: ##STR1## wherein R is an aliphatic or alicyclic hydrcarbon group having 4 to 10 carbon atoms, and n is a number of 2.00 to 20.00, and having an aliphatic OH group at the terminal; an aromatic polycarbonate polyurethane resin prepared from the polycarbonate polyol as set forth above and a polyisocyanate compound having two or more isocyanate groups in the molecule and optionally other components, particularly a chain extender having a polar group; a coating agent comprising the polycarbonate polyol and/or aromatic polycarbonate polyurethane resin as set forth above and optionally a polyisocyanate compound as set forth above and a solvent; a cast film comprising a coating film formed from the polycarbonate polyol and/or aromatic polycarbonate polyurethane resin as set forth above and a base film; and a magnetic recording medium compriisng a magnetic layer formed from the aromatic polycarbonate polyurethane resin as set forth above and optionally the polyisocyanate compound as set forth above, and a base film.

REFERENCES:
patent: 2999844 (1961-09-01), Muller et al.
patent: 3187065 (1965-06-01), McPherson et al.
patent: 3215668 (1965-11-01), Bissiner et al.
patent: 3474072 (1969-10-01), Bissinger et al.
patent: 4761338 (1988-08-01), Asano et al.

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