Back to results
US 7,893,154 B2Granted
Renewable binder for nonwoven materials
AssigneeDynea Oy
InventorsHendrikus W. G. Van Herwijnen, Elena Pisanova, Barbara Stefke
Life of this patent
Estimating the term…
Abstract
A formaldehyde-free curable aqueous composition comprising an adduct of (a) carbohydrate polymer and (b) a multi-functional crosslinking agent such as a polybasic acid may be used as a binder for non-woven products such as fiberglass insulation.
Claims20
A curable aqueous composition comprising an adduct of:
- (a) a carbohydrate polymer, and
- (b) a multi-functional crosslinking agent selected from a group consisting of monomeric polybasic acid, salt thereof, anhydride thereof, and mixtures thereof,
- wherein the adduct is prepared in a process comprising directly combining (a) and (b) in a weight ratio of (a):(b) of from 95:5 to about 35:65,
- wherein the cross-linking agent is selected from the group consisting of citric acid, maleic acid, maleic anhydride, succinic acid, glutaric acid, malic acid, phthalic acid, oxalic acid, adipic acid, tartaric acid, aspartic acid, phthalic anhydride, and mixtures thereof, and
- wherein the curable aqueous composition has a pH adjusted with a nitrogenous base.
2 more elements
A method of forming a curable aqueous composition comprising:
- combining
- (a) a carbohydrate polymer, and
- (b) a multi-functional crosslinking agent selected from a group consisting of
- monomeric polybasic acid, salt thereof, anhydride thereof, and mixtures thereof, and adjusting the pH of the curable aqueous composition with a nitrogenous base;
- wherein the weight ratio of (a):(b) is from 95:5 to about 35:65,
- wherein the cross-linking agent is selected from the group consisting of citric acid, maleic acid, maleic anhydride, succinic acid, glutaric acid, malic acid, phthalic acid, oxalic acid, adipic acid, tartaric acid, aspartic acid, phthalic anhydride, and mixtures thereof.
3 more elements
Dependencies are inferred from the claim text.