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US 11,661,376 B2Granted
Formaldehyde-free binder compositions and methods of making the binders under controlled acidic conditions
AssigneeJohns Manville
InventorsKiarash Alavi, Uranchimeg Lester, Jawed Asrar
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Abstract
Formaldehyde-free binder compositions are described that include an aldehyde or ketone, a reaction product between a polyamine and an organic anhydride, and an acidic compound. The acidic compound may be an organic acid, an acidic catalyst, or both. The acidic compound is supplied in quantities that lower the pH of the binder composition to about 5 or less. The binder compositions may be used in methods of binding fiberglass and the resulting fiberglass products have an improved tensile strength due to the addition of the acidic compound.
Claims8
A fiber-containing product comprising:
- glass fibers;
- and
- a cured binder formed from an aqueous binder solution composition comprising:
- an aldehyde or ketone,
- an amino-amide compound;
- a polycarboxylic acid;
- and
- one or more catalysts selected from the group consisting of sulfuric acid, a sulfuric acid salt, phosphoric acid, a phosphoric acid salt, nitric acid, and a nitric acid salt.
5 more elements
Dependencies are inferred from the claim text.