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US 6,071,994 AGranted
Formaldehyde-free aqueous binders
AssigneeBASF SE
InventorsRainer Hummerich, Axel Kistenmacher, Walter Denzinger, Gunnar Schornick, Bernd Reck, Manfred Weber
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Abstract
Formaldehyde-free aqueous binders comprise A) a polymer containing from 5 to [lacuna]% by weight of units derived from an ethylenically unsaturated acid anhydride or from an ethylenically unsaturated dicarboxylic acid whose carboxyl groups can form an anhydride group, and B) an alkanolamine having at least two hydroxyl groups.
Claims29
A process for producing fiber webs, which comprises using formaldehyde-free aqueous binders comprising:
- A) a free-radically polymerized polymer containing from 5 to 100% by weight of units derived from an ethylenically unsaturated acid anhydride or from an ethylenically unsaturated dicarboxylic acid whose carboxyl groups can form an anhydride group, and
- B) an alkanolamine having at least two hydroxyl groups,
- wherein the aqueous binder comprises less than 0.5% by weight, based on the sum of A)+B), of a phosphorus-containing reaction accelerant,
- as binders for the fiber webs.
1 more element
A formaldehyde-free aqueous binder, comprising:
- A) a free-radically polymerized polymer which contains from 5 to 100% by weight of units derived from an ethylenically unsaturated acid anhydride or from an ethylenically unsaturated dicarboxylic acid whose carboxyl groups can form an anhydride group, and
- B) an alkanolamine having at least two hydroxyl groups,
- wherein the aqueous binder comprises less than 0.5% by weight, based on the sum of A)+B), of a phosphorus-containing reaction accelerant, and
- wherein the binder dries at 50.degree. C. in 72 hours to a film from 0.3 to 1 mm in thickness and, following a subsequent 15 minutes cure at 130.degree. C. in air, has a gel content of above 50% by weight.
1 more element
Dependencies are inferred from the claim text.