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US 4,289,676 AGranted
Binders, impregnating agents and coating agents based on an aqueous dispersion of an amide-containing copolymer
AssigneeBASF SE
InventorsBernhard Czauderna, Andreas Einwiller, Kaspar Bott
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Abstract
Binders, impregnating agents and coating agents based on an aqueous dispersion of an amide-containing copolymer, wherein the copolymer contains recurring units of the general formula I ##STR1## where R is H and/or CH.sub.3, eliminate virtually no formaldehyde in use and may advantageously be used as binders for bonding nonwovens.
Claims8
A binder, impregnating agent and coating agent based on an aqueous dispersion of an amide-containing copolymer which contains from 3 to 6% by weight of recurring units of formula I:
- ##STR3## when R is H and/or CH.sub.3, up to 3% by weight of units of formula II:
- ##STR4## when R.sup.1 is H or CH.sub.3 and R.sup.2 is H or alkyl of 1 to 4 carbon atoms, and not less than 85% by weight of
- (a) a mixture of from 40 to 60 parts by weight of styrene and/or acrylonitrile and from 60 to 40 parts by weight of butadiene or
- (b) vinyl monomers selected from the group consisting of esters of acrylic acid or methacrylic acid with alkanols of 1 to 8 carbon atoms, vinyl esters and vinyl chloride, together with up to 40% by weight, based on total monomers (b), of acrylonitrile, styrene or butadiene,
- and from 0 to 5% by weight of .alpha.,.beta.-monoolefinically unsaturated monocarboxylic acids and/or dicarboxylic acids of 3 to 5 carbon atoms and/or their amides, the said monomers being present as copolymerized units.
2 more elements
Dependencies are inferred from the claim text.