Abstract
The influence of the content of aluminum hydroxide of various degree of dispersion on the rheological, physical-mechanical and adhesive properties, thermal and fire resistance of siloxane sealants was studied. It was established that the main factor determining the effectiveness of the use of aluminum hydroxide in siloxane sealants is the degree of dispersion. The introduction of aluminum hydroxide makes it possible to vary widely the viscosity of the sealant compositions, while with decreasing of particle size of aluminum hydroxide the viscosity of the compositions increases. The use of aluminum hydroxide with a minimum particle size makes it possible to obtain siloxane sealants with the most optimal level of physical-mechanical and adhesive properties, however, to increase the thermal and fire resistance of sealants, coarse aluminum hydroxide is most preferred.
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