WATERBASED FORMALDEHYDE FREE ADHESIVES
    2.
    发明申请
    WATERBASED FORMALDEHYDE FREE ADHESIVES 审中-公开
    含水甲醛免费粘合剂

    公开(公告)号:US20110200830A1

    公开(公告)日:2011-08-18

    申请号:US13054071

    申请日:2009-07-14

    摘要: There is described a formaldehyde-free laminating adhesive, optionally the with less than 3% by weight of co-solvent(s), the adhesive comprising: (I) a polyurethane that comprises from 30% to 65% by weight of hard segments, the polyurethane being obtained and/or obtainable from a first polyurethane dispersion (PUD) comprising the reaction product of (A) an organic isocyanate and (B) at least one chain extender reacting in a respective stoichiometric ratio (NCO to NCO reactive group) from 1:1 to 1:2.5 and; optionally the NCO reactive group(s) of the chain extender comprises one or more hydrazinyl-like group(s) (denoting isocyanate reactive groups selected from the group comprising, preferably consisting of: —NRNR2 (hydrazinyl groups); —CONRNR2 (hydrazidyl groups), —NRCONRNR2 (semicarbazidyl groups); and —ONR2 (oxyamine groups), where each R is independently selected from H or C1-10hydrocarbo); and (II) optionally a second polymer obtained and/or obtainable from a polymer precursor comprising at least one unsaturated moiety, preferably an ethylenically unsaturated group, and where optionally the second polymer may be iminated; with the provisos that: (α) when the first polyurethane does not comprise hydrazinyl-like group(s) then the second polymer is iminated; and (β) when the second polymer is un-iminated or is absent then the first polyurethane comprises hydrazinyl-like group(s). These adhesives may be used to adhere surface veneers to wood and/or to laminate the layers within plywood.

    摘要翻译: 描述了不含甲醛的层合粘合剂,任选地具有小于3重量%的助溶剂,粘合剂包含:(I)包含30重量%至65重量%硬链段的聚氨酯, 所述聚氨酯由包含(A)有机异氰酸酯和(B)至少一种以相应的化学计量比(NCO至NCO反应性基团)反应的至少一种扩链剂的反应产物的第一聚氨酯分散体(PUD)获得和/或获得, 1:1至1:2.5和; 任选地,扩链剂的NCO反应性基团包含一个或多个肼基 - 类基团(表示选自以下的异氰酸酯反应性基团:优选由以下基团组成:-NRNR2(腙基); -CONRNR2(肼基 ),-NRCONRNR2(氨基脲基);和-ONR2(羟胺基),其中每个R独立地选自H或C1-10氢化碳基); 和(II)任选的第二聚合物,其由包含至少一个不饱和部分,优选烯键式不饱和基团的聚合物前体获得和/或可获得,并且其中任选地第二聚合物可以被亚胺化; 条件是:(α)当第一聚氨酯不包含肼基 - 类基团时,则第二聚合物被仿制; 和(&bgr)时,当第二聚合物不被化学或不存在时,第一种聚氨酯包括类似肼基的基团。 这些粘合剂可以用于将表面胶合板粘附到木材上和/或将胶层层压在胶合板中。

    Aqueous Vinyl Graft Copolymer Compositions
    3.
    发明申请
    Aqueous Vinyl Graft Copolymer Compositions 审中-公开
    乙烯基接枝共聚物组合物

    公开(公告)号:US20080249242A1

    公开(公告)日:2008-10-09

    申请号:US12066537

    申请日:2006-09-13

    IPC分类号: C08L51/06

    摘要: An aqueous composition comprising at least one vinyl graft copolymer (A) and at least one vinyl polymer (B) obtained by a process comprising steps a) polymerising at least one vinyl monomer to obtain at least one macromonomer with a Tg1>15° C.; b) polymerising at least one vinyl monomer in the presence of the macromonomer prepared in step a) to form a polymeric backbone of said vinyl graft copolymer (A); c) polymerising at least one vinyl monomer in the presence of the vinyl graft copolymer (A) prepared in step b), to form said vinyl polymer (B); and where vinyl polymer (B) has a Tg2 lower than the Tg1 of the macromonomer.

    摘要翻译: 一种水性组合物,其包含至少一种乙烯基接枝共聚物(A)和至少一种乙烯基聚合物(B),所述乙烯基聚合物(B)通过以下方法获得,所述方法包括以下步骤:a)聚合至少一种乙烯基单体以获得至少一种具有Tg 1的大分子单体, / SUP >> 15°C。 b)在步骤a)中制备的大分子单体的存在下聚合至少一种乙烯基单体以形成所述乙烯基接枝共聚物(A)的聚合物骨架; c)在步骤b)中制备的乙烯基接枝共聚物(A)的存在下聚合至少一种乙烯基单体以形成所述乙烯基聚合物(B); 并且其中乙烯基聚合物(B)具有低于大分子单体的Tg <1的Tg <2。