交联剂复配使用对脱酮型硅酮密封胶性能的影响

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中图分类号：TQ436+.6 文献标志码：A

文章编号：1001-5922（2025）12-0044-04

Effect of crosslinking agent on the properties of silicone sealant

LIU Jie'， CHEN Bingyao²，HUANG Guobiao1， QUAN Wengao？

Guangdong Sanvo Chemical Technology Co.，Ltd.，Zhongshan 528429，Guangdong Chi 2.Guangdong Sanvo Holding Co.，Ltd.，Zhongshan 528429，Guangdong China; 3.Guangdong Fuhe Industrial Co.，Ltd.，Zhongshan528434，Guangdong China）

Abstract： Using α，ω -dihydroxy polydimethylsiloxane，nano calcium carbonate，crossinking agent，silane coupling agent and organotin catalyst as raw materials，a one-component deketoxime silicone sealant was prepared.The effects of diferent crossinking agents used aloneand in combination on storage stabilityand mechanical properties were studied.The results showed thatthe cross-linking agents with diferent structures had diffrent effects on the storage stability and mechanical properties of silicone sealant.When methyltri-butanone oxime silane（D3O）was used alone，the performance of silicone sealant decreased after thermal aging，and the change rate was 170% . When LM10O was used as crosslinking agent alone，the storage change rate of the material after treatment was 58% ，the tensile strength was 2.27MPa ，and the elongation at break was 42% .When D30 and LM10O were used in a mass ratio of 3：2 ，and after thermal aging treatment，the storage change rate of the material was significantly reduced to （204 88% ，the tensile strength was increased to 2.4MPa ，and the elongation at break was increased to 445% . The comparative data show that the performance of thecompound system is beterthanthatof the single crosslinking agent system，showing more excellent comprehensive performance.

Key words： silicone sealant;crosslinking agent;methyltri-butanone oxime silane;mechanical properties

硅酮密封胶是一种有机硅弹性体，具有良好的低温韧性，耐气候老化，耐紫外光2等性能，可长期在较宽的温度范围内使用3。（剩余3752字）