A polymer is prepared from monomers containing at least one carbon to carbon double bond and at least one siloxane moiety and from monomers containing at least one carbon to carbon double bond and at least one moiety that imparts reactivity to the resulting polymer. Siloxane moieties impart permeability; reactivity is obtained from monomers containing epoxy, oxetane, oxazoline, benzoxazine, or episulfide functionality. Additional properties can be added to the polymer by the Inclusion in the initial polymerization mix of monomers that impart low glass transition temperature, high glass transition temperature, and adhesion. The level of each functionality can be controlled by the practitioner by varying the amount of monomer containing that functionality added to the initial polymerization. These materials can be B-staged.
一种聚合物是由含有至少一个碳碳双键和至少一个
硅氧烷分子的单体,以及含有至少一个碳碳双键和至少一个能使聚合物产生反应性的分子的单体制备而成。
硅氧烷基团具有渗透性,而反应性则可从含有环氧、氧杂
环丁烷、
噁唑啉、苯并噁嗪或环
硫官能团的单体中获得。通过在初始聚合混合物中加入具有低
玻璃化转变温度、高
玻璃化转变温度和粘附性的单体,可为聚合物增加其他性能。从业人员可通过改变初始聚合中含有该功能性的单体量来控制每种功能性的
水平。这些材料可以进行 B 级聚合。