The present disclosure relates to a method of applying a pressure sensitive adhesive to a substrate, which comprises the steps of:
a) providing an uncrosslinked curable precursor of a pressure sensitive adhesive comprising:
(1) a (meth)acrylate copolymer component comprising:
i. C1-C32 (meth)acrylic acid ester monomer units;
ii. ethylenically unsaturated monomer units having functional groups selected from the group consisting of acid, hydroxyl, acid anhydride, epoxide, amine, amide groups, and any combinations thereof; and
iii. optionally, further ethylenically unsaturated monomer units which are copolymerizable with monomer units (i) and/or (ii);
(2) a thermal crosslinking system;
(3) at least one expandable microsphere;
(4) optionally, a tackifying system; and
(5) optionally, at least one pigment;
b) subjecting the curable precursor of a pressure sensitive adhesive to a first heating step such that the curable precursor of a pressure sensitive adhesive is partially crosslinked;
c) contacting the curable precursor of a pressure sensitive adhesive obtained in step b) to at least part of the surface of the substrate;
d) subjecting the curable precursor of a pressure sensitive adhesive to a second heating step such that the curable precursor of a pressure sensitive adhesive is fully crosslinked; and
e) optionally, allowing the polymeric foam layer to cool down on the substrate.
本公开涉及一种将压敏胶应用于基底的方法,该方法包括以下步骤:
a) 提供一种压敏胶的未交联固化前体,该前体包括
(1) (甲基)
丙烯酸酯共聚物组分,包括
i.C1-C32 (甲基)
丙烯酸酯单体单元;
乙烯基不饱和单体单元,其官能团选自酸、羟基、酸酐、
环氧化物、胺、酰胺基团及其任 何组合组成的组;以及
可与单体单元(i)和/或(ii)共聚的其他
乙烯基不饱和单体单元;
(2) 热交联体系;
(3) 至少一个可膨胀微球
(4) 可选的增粘系统;以及
(5) 可选至少一种
颜料;
b) 将压敏胶的可固化前体置于第一加热步骤中,使压敏胶的可固化前体部分交联;
c) 将步骤 b) 中获得的压敏胶可固化前体与基底的至少部分表面接触;
d) 将压敏胶的可固化前体置于第二加热步骤中,使压敏胶的可固化前体完全交联;以及
e) 可选地让聚合物泡沫层在基底上冷却。