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    • 13. 发明授权
    • Thermosetting adhesive compositions extended with cellulosic paper mill sludges
    • 热固性粘合剂组合物用纤维素纸浆污泥延伸
    • US3907728A
    • 1975-09-23
    • US40600273
    • 1973-10-12
    • BOISE CASCADE CORP
    • LAMBUTH ALAN LHEARON WILLIAM MONTGOMERY
    • C09J161/00C09J161/06C08G51/18
    • C09J161/00C08L2666/26C09J161/06Y10S162/09C08L61/06C08L97/02
    • Thermosetting resinous adhesives, useful particularly as plywood or lumber laminating adhesives, comprise a phenol-, resorcinol-, urea-, or melamine-formaldehyde resin and an extender therefor. The extender comprises an aqueous cellulosic pump used in relative proportions of from about 1-50 parts by weight extender for each 100 parts by weight resin, dry solids basis. Water is included in amount sufficient to impart to the compositions a viscosity of 1,000-12,000 centipoises. The cellulosic pulp extender preferably comprises the pulp mill paper making waste sludges containing the discarded cellulosic fines separated from the pulp products of the mill. Its inclusion has the effect of holding the water at the glue line and accordingly of improving significantly the assembly time characteristics of the adhesive.
    • 热固性树脂粘合剂,特别用作胶合板或木材层压粘合剂,包含苯酚,间苯二酚,脲或三聚氰胺 - 甲醛树脂及其增量剂。 增量剂包含水性纤维素泵,相对比例为约1-50重量份的增量剂,每100重量份树脂,基于干固体。 水的含量足以赋予组合物1,000-12,000厘泊的粘度。 纤维素浆料增量剂优选包括纸浆造纸废纸浆,其含有与磨机的纸浆产品分离的废弃的纤维素细粉。 其夹杂物具有将水保持在胶合线上,从而显着改善粘合剂的装配时间特性。