FORMALDEHYDE FREE BINDER COMPOSITIONS WITH UREA-ALDEHYDE REACTION PRODUCTS

摘要

Fiber-containing composites are described that contain woven or nonwoven fibers, and a cured binder formed from a binder composition that includes (1) a reducing sugar and (2) a crosslinking agent that includes a reaction product of a urea compound and a polycarbonyl compound. Exemplary reaction products for the crosslinking agent may include the reaction product of urea and an α,β-bicarbonyl compound or an α,γ-bicarbonyl compound. Exemplary fiber-containing composites may include fiberglass insulation.

主权项

1. A carbohydrate binder composition comprising:
a carbohydrate; a nitrogen-containing compound; and a catalyst that catalyzes a reaction between the carbohydrate and the nitrogen-containing compound, the catalyst comprising a salt of an oxyacid, wherein:
the oxyacid comprises a nonmetal atom,the nonmetal atom is neither hydrogen nor oxygen, andthe nonmetal atom has a lower oxidation state than a maximum oxidation state of the nonmetal atom in a stable oxyacid.