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    • 49. 发明授权
    • Tackified emulsion pressure-sensitive adhesive
    • 增粘乳液压敏粘合剂
    • US5623011A
    • 1997-04-22
    • US645693
    • 1996-05-14
    • Margaret M. Bernard
    • Margaret M. Bernard
    • C08L45/00C08L93/04C09J133/08C08L31/02
    • C09J133/08C08L45/00C08L93/04C09J2201/606Y02P20/582
    • A tackified pressure-sensitive adhesive having good convertibility and improved adhesive performance even at coat weights lower than conventional systems is provided. The pressure-sensitive adhesive comprises (a) an emulsion polymer formed from a monomer mix comprising 35 to 60% by weight alkyl acrylates, 15 to 35% by weight vinyl esters, 15 to 35% by weight diesters of dicarboxylic acids, and up to about 5% by weight unsaturated carboxylic acids, and (b) a tackifier having an acid number of from about 30 to about 60 and a ring and ball softening point of from about 50.degree. to about 70.degree. C. In one embodiment, the tackifier has a hydrocarbon resin component and a rosin-based resin component, with the preferred tackifier comprising an aromatic modified aliphatic resin containing wood rosin. A preferred adhesive comprises 8 to 12 parts by weight tackifier per 100 parts by weight polymer.
    • 提供了具有良好的可转换性和改进的粘合性能的增粘压敏粘合剂,即使在低于常规体系的涂层重量下也是如此。 压敏粘合剂包括(a)由单体混合物形成的乳液聚合物,该单体混合物包含35至60重量%的丙烯酸烷基酯,15至35重量%的乙烯基酯,15至35重量%的二羧酸二酯, 约5重量%的不饱和羧酸,和(b)酸值为约30至约60,环球软化点为约50至约70℃的增粘剂。在一个实施方案中,增粘剂 具有烃树脂组分和松香基树脂组分,优选的增粘剂包含含有木松香的芳族改性脂族树脂。 优选的粘合剂包含每100重量份聚合物8至12重量份的增粘剂。