Polyphenol compounds and treatment and after-treatment of metal, plastic and painted surfaces therewith
AssigneeHenkel Corporation
InventorsAndreas Lindert, Gerald J. Cormier, John R. Pierce
Life of this patent
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Abstract
A composition for treatment and after treatment of surfaces, especially metals, with derivatives of polyphenol compounds is provided. The derivatives include substituted aminomethyl groups on at least some of the phenyl rings in the polyphenol polymers, with molecular weights within the range of about 700 to about 70,000 being preferred. The compositions are particularly useful for treating chromated aluminum surfaces prior to painting, to improve corrosion resistance, and when combined with surfactants, for treating plastic and painted surfaces to improve rinsability without water breaks.
Claims20
A process for treating a surface selected from the group consisting of plastic and painted surfaces and chromate or chrome-phosphate conversion coated aluminum and aluminum alloy surfaces with a liquid surface treatment composition comprising water and a water dispersible or soluble polyphenol polymer with recurring units according to the formula:
- ##STR3## wherein:
- each of R.sub.1, R.sub.2, and R.sub.3 is independently selected for each repeating unit from hydrogen, an alkyl group having from 1 to 5 carbon atoms, or an aryl group having 6 to 18 carbon atoms;
- each of Y.sub.1 through Y.sub.4 is independently selected for each repeating unit from hydrogen;
- "Z" as defined below;
- --CR.sub.11 R.sub.5 OR.sub.6 wherein each of R.sub.5 and R.sub.6 is independently selected from hydrogen, an alkyl, an aryl, a hydroxy- or polyhydroxy-alkyl, an amino-alkyl, a mercapto-alkyl, or a phospho-alkyl moiety;
- --CH.sub.2 Cl;
- or an alkyl or aryl group having from 1 to 18 carbon atoms, subject to the constraint that at least one sixth of the Y.sub.2 groups in the recurring units are Z;
- and Z is:
- ##STR4## wherein each of R.sub.7 through R.sub.12 (with a possible exception for R.sub.12 as noted below) is independently selected within each repeating unit for each of R.sub.7 through R.sub.12 from hydrogen, an alkyl, an aryl, a hydroxy- or polyhydroxy-alkyl, an amino-alkyl, a mercapto-alkyl, or a phospho-alkyl moiety, and R.sub.12 may also be --O.sup.(-1) or --OH in order to form an amine oxide or hydroxyl amine, with the proviso that at least one of R.sub.9, R.sub.10, and R.sub.12 must be a polyhydroxy-alkyl group such as would be contained in an amine formed by reaction of ammonia or a primary amine containing only hydrogen and carbon in addition to nitrogen with a ketose, aldose, or other carboxyl group-containing polyhydroxy compound having from about 3 to about 8 carbon atoms and subsequently reducing the intermediate product of this reaction by hydrogenation to an amine;
- and
- W.sub.1 is independently selected for each repeating unit from the group consisting of a hydrogen;
- an acyl moiety;
- an acetyl;
- a benzoyl;
- a 3-allyloxy-2-hydroxy-propyl-;
- a 3-benzyloxy-2-hydroxy-propyl;
- a 3-alkylbenzyloxy-2-hydroxy-propyl;
- a 3-phenoxy-2-hydroxy-propyl-;
- a 3-alkylphenoxy-2-hydroxy-propyl-;
- a 3-butoxy-2-hydroxy-propyl-;
- a 3-alkyloxy-2-hydroxy-propyl-;
- a 2-hydroxyoctyl-;
- a 2-hydroxyalkyl-;
- a 2-hydroxy-2-phenyl-ethyl-;
- a 2-hydroxy-2-alkyl-phenylethyl-;
- a benzyl-;
- an alkyl-;
- an allyl-;
- an alkylbenzyl-;
- a haloalkyl-;
- or a haloalkenyl such as 2-chloropropenyl-;
- or a condensation product of ethylene oxide, propylene oxide, or a mixture or copolymer thereof.
Dependencies are inferred from the claim text.