摘要:
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).
摘要:
A composite material containing substantially homogeneous matrix of a gypsum material and a urea-formaldehyde material where wet-used chopped strand fibers are filamentized within the substantially homogeneous matrix.
摘要:
A sizing composition including one or more primary lubricants, at least one secondary lubricant, and at least one coupling agent is provided. The primary lubricant is a fatty amide lubricant that is the condensation product of a saturated fatty acid having at least 16 carbon atoms and a polyamine. Additionally, the primary lubricant acts both as a lubricant and as a cationic surfactant in the size composition when it is neutralized with a weak acid to assist in dispersing the fibers in a gypsum slurry. The secondary lubricant is polyamide or a polyvinyl amine, and acts as a film forming agent in the fiberizing process to protect the glass fibers from interfilament abrasion. The sizing composition provides improved fiber feeding, fiber flow, and fiber dispersion in a gypsum matrix or slurry. The weight ratio by dry solids of primary to secondary lubricant in the size composition is at least 5:1.
摘要:
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).
摘要:
A composite material containing wet chopped strand fibers, gypsum, and a polymer material is provided. The wet fibers are filamentized within the polymer material. In exemplary embodiments, the wet chopped strand fibers are wet-used chopped strand glass fibers. The gypsum may be α-gypsum, β-gypsum, or combinations thereof. In at least one embodiment, the polymer is a urea-formaldehyde resin. The composite material may contain a facing layer on at least one exposed major surface of the composite material. A method of forming a composite material that includes mixing gypsum with a polymer material to form a substantially homogeneous matrix and adding a sufficient quantity of wet-used chopped strand fibers to form the composite material is also provided.
摘要:
A composite material containing substantially homogeneous matrix of a gypsum material and a urea-formaldehyde material where wet-used chopped strand fibers are filamentized within the substantially homogeneous matrix.
摘要:
A size composition for reinforcement fibers used to form non-woven mats that contain variable amounts of individual filaments dispersed from chopped reinforcement fiber bundles is provided. The size composition contains a polyvinylamine film former, one or more silane coupling agents, and, optionally a lubricant. The size composition works in conjunction with the whitewater components in a wet-laid mat forming process to disperse individual filaments from the bundles of chopped fibers. The whitewater contains an anionic polyacrylamide viscosity modifier and/or a cationic or non-ionic amine dispersant (e.g., ethoxylated amine). The presence of a cationic or non-ionic amine in the whitewater disperses individual filaments from the chopped glass fiber bundles. The greater the amount of cationic or non-ionic amine present in the whitewater, the greater the amount of fiber dispersion. The absence of a cationic or non-ionic amine and the presence of an anionic polyacrylamide viscosity modifier maintain full bundle formation integrity.