Copolymers containing an acrylamidophenol as a crosslinking site and the corresponding crosslinked polymers are disclosed. The acrylamidophenol unit can be copolymerized with a wide variety of other monomers to provide crosslinkable and crosslinked polymers with useful properties. The acrylamidophenol unit provides for crosslinking at low pH with conventional crosslinking agents. The acrylamidophenol monomer unit is present in the copolymer from about 0.5 to 50 percent by weight and has the formula: ##STR1## wherein: x is 1 or 0, L is a linking group, R represents hydrogen or methyl, and R.sup.1 through R.sup.5 are independently selected from the group consisting of hydrogen, hydroxy, alkyl from 1 to 6 carbon atoms and aryl from 6 to 10 carbon atoms; with the proviso that at least one of R.sup.1 through R.sup.5 is hydroxy and at least one of the positions ortho or para to said hydroxy has a hydrogen atom attached thereto. The remainder of the polymer can comprise from 50 to 99.5 percent by weight of at least one additional polymerized ethylenically unsaturated monomer. Elements, particularly photographic elements, comprising a support having coated thereon either the crosslinked or uncrosslinked polymer are also disclosed.
本发明披露了含有
丙烯酰胺基
酚交联位点的共聚物及相应的交联聚合物。
丙烯酰胺基
酚单元可以与各种其他单体共聚,以提供具有有用性能的可交联和交联聚合物。
丙烯酰胺基
酚单元提供了在低pH值下使用传统
交联剂进行交联的能力。
丙烯酰胺基
酚单体单元在共聚物中的含量为重量的0.5%至50%,其
化学式为:##STR1## 其中:x为1或0,L为连接基团,R代表氢或甲基,R.sup.1至R.sup.5分别独立地选择自羟基,碳数为1至6的烷基和碳数为6至10的芳基的群组中的一种;但须满足R.sup.1至R.sup.5中的至少一个为羟基,并且至少一个与该羟基正交或对位的位置上有一个氢原子附着。聚合物的剩余部分可以由重量为50%至99.5%的至少一种其他聚合
乙烯不饱和单体聚合而成。本发明还披露了包括涂覆有交联或未交联聚合物的支撑物的元素,特别是摄影元素。