Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1980-11-10
1982-01-05
Schofer, Joseph L.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
260 293, 260 297NR, 260 294UA, 525 66, 525 68, 525139, 525163, C25D 1300
Patent
active
043092608
ABSTRACT:
A binder for a heat-curable aqueous coating composition for metallic surfaces comprises:
(A) 60-95% by weight of a water-soluble and/or water-dispersible addition compound of 10-35% by weight of one or more .alpha.,.beta.-unsaturated dicarboxylic acids and 65-90% by weight of a butadiene polymer which is liquid at 20.degree. C., contains at least 50 mole % of butadiene units and has a molecular weight of 500 to 6,000, the addition compound being at least partially neutralized with a basic compound and partially esterified,
and
(B) 5-40% by weight of a water-soluble and/or water-dispersible crosslinking resin having, on the average, at least 2 chemically different reactive groups per mole,
wherein the addition compound (A) is esterified to 10-70 equivalent percent, based on its acid number, with one or more unsaturated alcohols of the formula ##STR1## and wherein at least one of the reactive groups of the crosslinking resin (B) is of formula II ##STR2## wherein, for both formulae I and II, R.sup.1, R.sup.2 and R.sup.3 can be identical or different and each independently is hydrogen or methyl,
R.sup.4 is hydrogen or C.sub.1-5 -alkyl, and n is 0 or 1.
REFERENCES:
patent: 3658795 (1972-04-01), Daimer
patent: 3796770 (1974-03-01), Daimer et al.
patent: 4111872 (1978-09-01), Dworak
Encyclopedia of Polymer Science and Technology, Plastics, Resins, Rubbers, Fibers, vol. 11, 1969, John Wiley & Sons, p. 280.
Chemische Werke Huels AG
Lipman Bernard
Schofer Joseph L.
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