Carpet backing adhesive and its use in recyclable carpet

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 125/10 (2006.01) A47G 27/02 (2006.01) B29B 17/02 (2006.01) C09J 11/04 (2006.01) C09J 133/02 (2006.01) C09J 135/06 (2006.01) D06N 7/00 (2006.01)

Patent

CA 2405969

An adhesive useful in making recyclable carpet is prepared from a copolymer dispersion and a filler. The copolymer dispersion is prepared in an emulsion polymerization of a mixture of monomers comprising styrene, butadiene, an alkylacrylic acid monomer, in which the alkyl radical of the alkylacrylic acid monomer is a C1 to C6 branched or unbranched hydrocarbyl radical, and a combination of a second ethylenically unsaturated monocarboxylic acid with an ethylenically unsaturated dicarboxylic acid, in which the alkyacrylic acid monomer is present in a quantity predominating the combination of the second ethylenically unsatu-rated monocarboxylic acid with the ethylenically unsaturated dicarboxylic acid. The adhesive can be completely removed from the face fibers by applied shear in the presence of aqueous alkaline solution. Recyclable carpets made with the adhesive exhibit high delamination strenght, both when wet and when dry.

L'invention concerne un adhésif utile dans la fabrication de tapis recyclés, qui est préparé à partir d'une dispersion copolymère et d'une charge. La dispersion copolymère est préparée dans une polymérisation en émulsion d'un mélange de monomères contenant du styrène, du butadiène, un monomère d'acide alkylacrylique, dans lequel le radical alkyle du monomère d'acide alkylacrylique est un radical hydrocarbyle ramifié ou non ramifié C1 à C6, et une combinaison d'un second acide monocarboxylique éthyléniquement non saturé et d'un acide dicarboxylique éthyléniquement non saturé, le monomère d'acide alkylacrylique étant présent en quantités supérieures à la combinaison précitée. L'adhésif peut se retirer complètement des fibres de face par un cisaillement appliqué en présence d'une solution alcaline aqueuse. Les tapis recyclables fabriqués avec l'adhésif présentent une force élevée de délamination, aussi bien à l'état mouillé que sec.

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