Binder composition of a polycarboxy emulsion and polyol

Details Binder composition of a polycarboxy emulsion and polyol Binder composition of a polycarboxy emulsion and polyol

C - Chemistry, Metallurgy

09

J

C09J 133/02 (2006.01) C09J 11/06 (2006.01) D04H 1/58 (2006.01)

Patent

CA 2642965

A binder composition and a nonwoven mat comprising nonwoven fibers bound by the binder composition are provided. The binder composition includes: at least one polycarboxy emulsion copolymer comprising as_copolymerized units from 10% to 25% by weight of a carboxy acid monomer, wherein said copolymer has a measured glass transition temperature or Tg of from 40°C to 70°C, and a total weight solids of no less than 40%; and at least one polyol crosslinker having a molecular weight of less than 700, wherein said polyol crosslinker comprises a primary hydroxy group and at least one additional hydroxy group, wherein the ratio of primary hydroxy group equivalents to carboxy group equivalents is from 0.25 to 2Ø

Divulgation d'une composition de liant et d'un mat en nontissé en fibres non tissées liées au moyen de cette composition. La composition de liant comprend : au moins un copolymère en émulsion comprenant comme unités copolymérisées de 10 à 25 % en poids d'un acide carboxylique, ledit polymère ayant une température de transition vitreuse mesurée (Tg) allant de 40 à 70 degrés C et une teneur totale en solides d'au moins 40 %; au moins un polyol de réticulation ayant une masse moléculaire d'au plus 700, ledit polyol de réticulation comportant un groupe hydroxyle primaire et au moins un autre groupe hydroxyle, le rapport des équivalents de groupe primaire et de groupe carboxyle étant de 0,25 à 2,0.

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