COMPOSITION OF HEAT-CONDUCTING SEALING MATERIAL Russian patent published in 2021 - IPC C08K3/10 C08K3/22 C08K3/34 C08L83/04 C08K5/5415 

FIELD: material engineering.

SUBSTANCE: present invention relates to the composition of a heat-conducting sealing material for sealing detachable and non-removable assemblies. This composition consists of a base and a hardener. The base contains: organosilicon polydimethylsiloxane rubber SKTN, powdered filler redoxide, characterized in that it additionally contains silicone oligomer PMS-20 and/or PMS-50, and as fillers also fine aluminum trihydrate, powdered quartz, powdered talc, aluminum oxide or aluminum nitride, as well as ethyl silicate-32 or ethyl silicate-40. The hardener contains: a vulcanization catalyst for silicone rubbers K-68 or K-18 and additionally contains silicone oligomer PMS-50, ethyl silicate-40, aluminum trihydrate with a particle size of 5-20 mcm, as well as carbon black or titanium dioxide. The mass ratios of the base and hardener are: from 10:0.5 to 10:1.0.

EFFECT: development of a heat-conducting sealant based on silicone elastomers and silicone oligomers, which is a multicomponent heterogeneous system filled with fine agglomerates of particles with different structures and with different heat-conducting properties, which has the required technological properties at the required level of thermal conductivity, dielectric and mechanical properties (low initial viscosity, sufficient viability and optimal time of complete curing).

1 cl, 4 tbl, 17 ex