摘要
考查了相对湿度对不同硫化体系、不同填料体系的单组分室温硫化（RTV-1）有机硅密封胶硫化性能的影响.结果表明：相对湿度对三种硫化体系的5种有机硅密封胶的硫化性能均有明显的影响.随着相对湿度的增加,脱酸型和脱醇型（填料为SiO2）有机硅密封胶的表干时间缩短、消粘时间延长、硫化深度增加;脱酮肟型（填料为SiO2和CaCO3）产品的表干时间缩短、消粘时间基本不变、硫化深度增加;脱醇型（填料为CaCO3）产品的表干时间延长、消粘时间延长、硫化深度增加.SJS 668（脱酸型）和SJS9200（脱酮肟型,填料为SiO2）在相对湿度为20%～95%的条件下均可以施工,但相对湿度低时需延长养护时间;SJS 5500（脱醇型,填料为SiO2）适宜施工的相对湿度为35%～65%;SJS 6300（脱醇型,填料为CaCO3）和SJS 3300（脱酮肟型,填料为CaCO3）适宜施工的相对湿度为35%～80%.
The effects of the relative humidity on the vulcanizing properties of one-component RTV-1 silicone sealant in different curing system and with different filler systems were discussed. The results showed that the relative humidity affected the vulcanizing properties of five products with three curing systems. For acetic cured and methanol cured products with SiO_2 filler, higher relative humidity shortened the surface drying time, extended the tack-free time and increased the cured depth. For oxime cured silicone sealant with filler SiO_2, higher relative humidity shortened the surface drying time, increased the cured depth but had little effects on the tack-free time. For methanol cured silicone sealant with filler CaCO_3, higher relative humidity increased the surface drying time, the tack-free time and cured depth as well. For oxime cured silicone sealant with filler CaCO_3, higher relative humidity shortened the surface drying time, increased the cured depth but did not change the tack-free time. Both acetic acid cured SJS668 and oxime cured SJS9200(filler: SiO_2)could be vulcanized in the condition of relative humidity range from 20%～95%. However, it was necessary to extend conservation time when relative humidity was low. Methanol cured SJS5500(filler: SiO_2)was cured in the condition of relative humidity range from 35%～65%, and both ethanol cured SJS6300 (filler: CaCO_3 ) and oxime cured SJS3300 (filler: CaCO_3) were cured in the condition of relative humidity range from 35%～80%.
出处
《有机硅材料》
CAS
2006年第3期108-110,共3页
Silicone Material
关键词
有机硅密封胶
单组分
相对湿度
表干时间
消粘时间
硫化深度
silicone sealant, one component, relative humidity, vulcanizing property, tack free time, cured depth
