Condensed type double-component silicone sealant and preparation method thereof

• Main Authors: LIU ZHENGWEI, ZENG WU, ZENG RONG, JIANG JINBO, ZHANG GUANQI
• Format: Patent
• Language: English
• Published: 03.06.2015
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; DYES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; POLISHES; USE OF MATERIALS AS ADHESIVES

The invention discloses a condensed type double-component silicone sealant and a preparation method thereof. The silicone sealant composed of a component A and a component B, wherein the component A comprises 100 parts of organic polysiloxane polymer and 60-150 parts of inorganic fillers; the B component comprises 2-10 parts of organic polysiloxane polymer, 0.1-10 parts of inorganic fillers, 2-10 parts of silane crosslinking agent, 1-6 parts of silane coupling agent, 0-0.2 part of organic bismuth catalyst and 0.01-1 part of titanium catalyst; the silane crosslinking agent is selected at least one of compounds with structures as shown in a formula I, R1-R6 are C1-C6 alkyls or alkoxys, at least two of R1-R6 are independently selected from C1-C6 alkoxys, and m is 0, 1, 2, 3, 4. The prepared sealant has good physical and mechanical properties, can relieve the reversion phenomenon resulting from heating in a sealed condition and is widely used such fields as buildings, hollow insulating glass, electronic and electrical appliances, road traffic, etc.