Moisture-curable rubbers

1.环氧氯丙烷橡胶(ECO)与氨基丙基三乙氧基硅烷(APS)和二月桂酸二丁基锡(DBTDL)共混物的湿法硫化是湿法硫化的，其网链密度可达5×10~(-4)~(-4)~(-4)~(-5)，最大拉伸强度为7.0 Mpa。由于ECO2的亲水性，该弹性体表现出极高的吸湿性。氯化聚乙烯(CPE)的湿固化CPE在氯中的低反应性阻止了与APS的接枝反应，即使在添加DBTDL后也是如此。因此，CPE不能用保湿治愈。APS、DBTDL与氯丁橡胶(CR)共混的氯丁橡胶(CR)是湿法硫化的，网链密度为3xlt；10^(-4)&gt；mo1/lt；cm3&gt；最大拉伸强度为10 Mpa。然而，CR和APS之间不可避免的预硫化反应降低了拉伸强度。结论含卤素聚合物、1-氯丁二烯-丁二烯共聚物、氯化丁基橡胶、溴化丁基橡胶、氯磺化聚乙烯、环氧氯丙烷橡胶和氯丁橡胶在APS和DBTDL存在下均可湿式硫化。所得弹性体具有相对较高的拉伸强度，与普通热硫化橡胶的拉伸强度相当。对湿固化反应的研究使我们能够确定最佳的反应条件。白炭黑复合材料使湿法硫化橡胶具有较高的补强效果。从这些结果中，我们可以证明湿养护的可行性。

1. Moisture-cure of epichlorohydrin rubber (ECO) ECO compounded with aminopropyltriethoxysilane (APS) and dibutyltin dilaurate (DBTDL) was moisture-curable; the resulting network-chain density attained 5 x <10^(-4)> mol/ <cm^3> and the maximum tensile strength was 7.0 MPa. This elastomer showed an extremely high hygroscopic nature due to hydrophilicity of ECO.2. Moisture-cure of chlorinated polyethylene (CPE)Low reactivity in chlorine of CPE prevents grafting reaction with APS even after an addition of DBTDL. And thus, CPE cannot be cured with moisture.3. Moisture-cure of chloroprene rubber (CR)CR compounded with APS and DBTDL was moisture-curable; the network-chain density was 3 x <10^(-4)> mol/ <cm^3> and the maximum tensile strength was 10 MPa. However, an unavoidable prevulcanization reaction between CR and APS reduced the tensile strength.4. ConclusionHalogen containing polymers, 1-chlorobutadiene-butadiene copolymer, chlorinated butyl rubber, brominated butyl rubber, chlorosulfonated polyethylene, epichlorohydrin rubber, and chloroprene rubber were moisture-curable in the presence of APS and DBTDL. The resulting elastomers gave relatively high tensile strength which were comparable with those of usual heat-vulcanizated rubbers. Investigations of the moisture-curing reaction enabled us to determine the optimal reaction conditions. Silica composites gave the moisture-cured rubber high reinforcing effects. From these results, we could prove a feasibility of moisture-cure.