Cationic fiberglass size

Details Cationic fiberglass size Cationic fiberglass size

C - Chemistry, Metallurgy

03

C

C03C 25/32 (2006.01) C03C 25/40 (2006.01) C08J 5/08 (2006.01)

Patent

CA 2710469

A sizing composition for reinforcement fibers that includes a cationic modified polyurethane dispersion, one or more silane coupling agents, and at least one lubricant is provided. The cationic modified polyurethane dispersion includes a dual end-capped polyurethane selected from a silane-terminated polyurethane, a ketoxime-terminated polyurethane, or a hybrid silane/ketoxime-terminated polyurethane where one end of the polyurethane is terminated with a silane group and the opposing end is terminated with a ketoxime group. The size composition is applied to reinforcement fibers and formed into chopped strand, wet-laid mats that can be used for a variety of purposes, including roofing products. Chopped strand mats formed from fibers sized with the inventive sizing composition maintains or improves the dry tear strengths and wet strengths compared to chopped strand mats made from fibers sized with a commercial sizing composition that does not contain a modified cationic polyurethane dispersion (e.g., SPUD). A sizing composition for reinforcement fibers that includes a cationic modified polyurethane dispersion, one or more silane coupling agents, and at least one lubricant is provided. The cationic modified polyurethane dispersion includes a dual end- capped polyurethane selected from a silane-terminated polyurethane, a ketoxime- terminated polyurethane, or a hybrid silane/ketoxime-terminated polyurethane where one end of the polyurethane is terminated with a silane group and the opposing end is terminated with a ketoxime group. The size composition is applied to reinforcement fibers and formed into chopped strand, wet-laid mats that can be used for a variety of purposes, including roofing products. Chopped strand mats formed from fibers sized with the inventive sizing composition maintains or improves the dry tear strengths and wet strengths compared to chopped strand mats made from fibers sized with a commercial sizing composition that does not contain a modified cationic polyurethane dispersion (for example, SPUD).

L'invention concerne une composition d'apprêt pour des fibres de renforcement qui comprend une dispersion de polyuréthanne cationique modifié, un ou plusieurs agents de couplage au silane, et au moins un lubrifiant. La dispersion de polyuréthanne cationique modifié comprend un polyuréthanne à double coiffe d'extrémité sélectionné à partir d'un polyuréthanne terminé par silane, un polyuréthanne terminé par cétoxime, ou un polyuréthanne hybride terminé par silane/cétoxime où une première extrémité du polyuréthanne est terminée par un groupe silane et l'extrémité opposée est terminée par un groupe cétoxime. La composition d'apprêt est appliquée sur des fibres de renforcement et formée en brins coupés, en nattes disposées à l'état humide qui peuvent être utilisés à des fins diverses, y compris des produits de toiture. Des nattes de brins coupés formées à partir de fibres apprêtées avec la composition d'apprêt de l'invention maintiennent ou améliorent les résistances au déchirement à sec et les résistances à l'état humide par comparaison à des nattes de brins coupés fabriquées à partir de fibres apprêtées avec une composition d'apprêt commerciale qui ne contient pas de dispersion de polyuréthanne cationique modifié (par exemple, SPUD).

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