A film of rubbery latex, articles of manufacture made from the film, and a process of making the film
申请人:THE B.F. GOODRICH COMPANY
公开号:EP0264871A2
公开(公告)日:1988-04-27
A novel film made from a latex having an exceptional balance of physical properties is prepared by polymerizing an unsaturated dicarboxylic acid with a copolymerizable monomer(s) and, optionally, a crosslinking monomer in the presence of an effective amount of a surfactant and an initiator. In a preferred embodiment of the process for making the film, all of the unsaturated dicarboxylic acid is initially placed in the reactor and a premix containing the copolymerizable monomer(s) and crosslinking monomer is metered into the reactor. The unsaturated dicarboxylic acid contains from 4 to about 10 carbon atoms and is used in an amount from about 1 to about 20 weight parts, the amount of the copolymerizable monomer employed is from about 70 to 99 weight parts, and the amount of the crosslinking monomer, which is optional, is from about 0.5 to about 10 weight parts. The novel films have a Tg of from about -20°C. to about -60°C., a percent hysteresis loss of less than about 20%, and exhibit a tensile strength of at least 300 psi and an elongation of at least 350 percent. Additionally, the novel film has a cross product of tensile strength times percent elongation of at least 140,000.
一种由具有优异平衡物理性质的胶乳制成的新型薄膜,是在有效量的表面活性剂和引发剂存在下,通过将不饱和二羧酸与可共聚单体以及交联单体聚合而制备的。在薄膜制造工艺的一个优选实施方案中,最初将所有不饱和二羧酸放入反应器中,然后将含有可共聚单体和交联单体的预混料计量放入反应器中。不饱和二羧酸含有 4 至约 10 个碳原子,用量约为 1 至约 20 重量份,可共聚单体用量约为 70 至 99 重量份,交联单体(可选)用量约为 0.5 至约 10 重量份。新型薄膜的 Tg 值为约 -20°C 至约 -60°C,滞后损失小于约 20%,拉伸强度至少为 300 psi,伸长率至少为 350%。此外,这种新型薄膜的拉伸强度与伸长率的乘积至少为 140,000。