中低温固化黏接双组分加成型液体硅橡胶的制备  

Preparation of Two-component Additive Liquid Silicone Rubber Cured at Medium and Low Temperature

作　　者：欧静 余晓桃 何淑婷 OU Jing;YU Xiaotao;HE Shuting(Guangzhou Mechanical Engineering Research Institute Co.,Ltd.,Guangzhou Guangdong 510700,China;Wuhan Huazhong Numerical Control Co.,Ltd.(HCNC),Wuhan Hubei 430223,China)

机构地区：[1]广州机械科学研究院有限公司,广东广州510700 [2]武汉华中数控股份有限公司,湖北武汉430223

出　　处：《润滑与密封》2020年第10期131-135,共5页Lubrication Engineering

基　　金：国机智能科技发展基金技术开发专项(18300033).

摘　　要：为开发一款对各类基材具有良好黏接性的中低温固化液体硅橡胶,研究增黏剂类型、铂催化剂质量分数、含氢硅油活性氢含量对加成型硅橡胶硫化速度和黏接性等性能的影响。结果表明:当环氧含氢环体增黏剂和苯基含氢增黏剂复配时,制备的硅橡胶的硫化速度、对不同基材的黏接力等性能均较好;随着铂催化剂质量分数、含氢硅油活性氢含量的增大,硫化速度均加快,但黏接强度先增加后降低。当环氧含氢环体增黏剂和苯基含氢增黏剂配比为2∶1,铂催化剂质量分数为1.5×10^-5,含氢硅油活性氢质量分数为0.5%时,研制的双组分加成型液体硅橡胶可在60℃下20 min完全固化,且对不同基材具有良好的黏接性,对不锈钢、聚苯醚(PPO)基材的拉伸剪切强度分别达到1.8 MPa和1.1 MPa。In order to develop a two-component additive liquid silicone rubber with good adhesion to various substrates,the effects of tackifier type,platinum catalyst mass fraction,active hydrogen content of hydrogenated silicone oil on vulcanization rate and adhesion properties of addition liquid silicone rubber were studied.The results show that when epoxy hydrogen containing ring tackifier and phenyl hydrogen containing tackifier are compounded,the curing rate and adhesion of the silicone rubber to different substrates are better.With the increase of the mass fraction of platinum catalyst and the active hydrogen content of hydrogenated silicone oil,the curing is speeding up,but the bonding strength is first increased and then decreased.When the ratio of epoxy hydrogen containing ring tackifier and phenyl hydrogen containing tackifier is 2∶1,the mass fraction of platinum catalyst is 1.5×10^-5 and the mass fraction of active hydrogen in hydrogenated silicone oil is 0.5%,the two-component additive liquid silicone rubber can cure completely at 60 ℃ in 20 min,and shows excellent adhesion to different substrates.The tensile shear strength of the silicone rubber to stainless steel and polyphenylene oxide(PPO) substrate reaches 1.8 MPa and 1.1 MPa respectively.

关 键 词：中低温固化 加成型硅橡胶 黏接 

分 类 号：TQ333.93[化学工程—橡胶工业]