CURABLE FORMALDEHYDE FREE COMPOSITIONS AS BINDERS HAVING SOLVENT RESISTANCE

• Main Authors: KELLY, MICHAEL D, CRESCIMANNO, STEPHEN A
• Format: Patent
• Language: English
• Published: 17.04.2014
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

The present invention provides aqueous binder compositions comprising one or more polyol and a multistage copolymer, preferably, an all acrylic and allylic or all 5 acrylic copolymer, having as the outermost stage a polymerized acid functional aqueous solution polymer and as the one or more remaining stage(s) a vinyl emulsion polymer, wherein the emulsion polymer stage(s) in the multistage copolymer comprises 5 wt.% or less of hydrophilic monomer, based on the total weight of monomers used to make the emulsion polymer stage(s). The multistage 0 copolymer enables incorporation of a much higher amount of hydrophilic monomer into a polymeric binder without the attendant handling or viscosity problems. Also provided are methods of using the aqueous binder compositions comprising pultruding two or more non-woven fibers or a fiber roving with the aqueous binder composition, and drying, Articles comprising the bound fiber(s) are provided.