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冶金部建筑研究总院研制的CB型丙烯酸建筑密封膏采用高固含量、低玻璃化温度及稳定性和耐久性好的纯丙烯酸酯乳液为胶结剂,经过化学改性而制成的建筑密封膏,其固含量达85％,质量密度为1.43g/cm~3,玻璃化温度为-40℃,拉伸强度为0.08～0.12MPa,延伸率大于800％,经168h人工大气老化后不变硬,主要性能基本无变化;在5～26℃环境下可保存一年。从1987年至1989年止,共生产200t以上CB型丙烯酸密封膏,已应用于北京、上海、四川、山东和辽宁等省市的工业和民用建筑,通过近3年的工程应用,证明该密封膏能满足建筑上多种形式的防水密封要求,用户普遍反映良好。
The CB type acrylic building sealant developed by the Ministry of Metallurgical Construction Research Institute uses a high solid content, low glass transition temperature, and a pure acrylate emulsion with good stability and durability as a cement, and a chemically modified building sealant , Its solid content is up to 85%, mass density is 1.43g/cm~3, glass transition temperature is -40°C, tensile strength is 0.08~0.12MPa, elongation is more than 800%, it does not change after 168 hours artificial atmospheric aging. The main performance is basically unchanged; it can be stored for one year at a temperature of 5 to 26°C. From 1987 to 1989, a total of 200 tons of CB acrylic sealant was produced. It has been used in industrial and civil buildings in Beijing, Shanghai, Sichuan, Shandong, and Liaoning provinces. Through nearly three years of engineering application, the seal has been proved. The paste can meet various forms of waterproof seal requirements on the building, and users generally reflect it well.