申请人:ROHM AND HAAS COMPANY
公开号:EP0392767A2
公开(公告)日:1990-10-17
An improvement to two phase thermoplastic elastomer polymers comprising a final thermoplastic phase is disclosed. The polymers are useful in coatings, mastics, caulks, adhesives and articles, and comprises
(a) a linear, or lightly crosslinked, polymeric phase, formed from at least one α,β-ethylenically unsaturated monomer of which no more than two percent by weight is multi-ethylenically unsaturated monomer, and
(b) a further polymeric phase in the form of discrete domains of from 2 to 50 nanometers in diameter dispersed within phase, (a), said further phase comprising polymer comprising units of at least one ethylenically unsaturated monomer which itself comprises at least 5, preferably at least 50 and more preferably 100 percent by weight of monomer having at least two sites of ethylenic unsaturation, the weight ratio of solids in said further phase to total solids in both phases being from 1:100 to 1:2; characterised in that
(c) the composition also contains subsequent polymeric phase which is thermoplastic and has a glass transition temperature higher than that of phase (a) and at least a portion of which subsequent phase is intimately attached to at least one of phases (a) and (b).
本发明公开了一种由最终热塑性相组成的双相热塑性弹性体聚合物的改进产品。这种聚合物可用于涂料、胶粘剂、填缝剂、粘合剂和物品,包括
(a) 线性或轻度交联聚合物相,由至少一种 α、β-乙烯基不饱和单体形成,其中多元乙烯基不饱和单体的重量百分比不超过 2%,以及
(b) 另一种聚合物相,其形式为分散在(a)相中的直径为 2 至 50 纳米的离散结构 域,所述另一相包括由至少一种乙烯基不饱和单体单元组成的聚合物,该单体 本身含有至少 5%,最好是至少 50%,更理想的是 100%(按重量计)的单体, 该单体具有至少两个乙烯基不饱和位点,所述另一相中的固体与两相中总固 体的重量比为 1:100 至 1:2;其特征在于
(c) 组合物中还含有后续聚合物相,该相为热塑性,其玻璃化转变温度高于 (a) 相,且至少有一部分后续相与 (a) 相和 (b) 相中的至少一个相紧密相连。