Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1993-10-04
1996-09-03
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
528272, 528302, 528307, 525437, 524601, 524604, C08J 302
Patent
active
055524753
ABSTRACT:
Substituted polycarboxylic acids or substituted anhydrides as acidifying agents stabilize a waterborne polyester from saponification, provided: (a) the acidification is carried out to an extent sufficient to provide an acid number of at least 40 milligrams KOH per gram of polyester resin; and (b) the substitution on the polycarboxylic acid or anhydride is either an alkenyl group having at least four carbon atoms or a cyclic group in which the ring is not aromatic. The relatively high acid number renders the polyester dispersible in water without the need to rely on surfactants.
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"Water Based Coatings with Excellent Saponification Stability", H. Blum, P. Hohlein, J. Meixner, Bayer A.-G. Krefeld Urdingen, pp. 45 thru 56.
Ambrose Ronald R.
Camp Douglas R.
Sundararaman Padmanabhan
Wilt Truman F.
Acquah Samuel A.
Chirgott Paul S.
Millman Dennis G.
PPG Industries Inc.
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