ADDITION CURABLE SILICONE REBBER COMPOSITION AND CURED SILICON REBBER

摘要

The present invention relates to an addition hardening-type silicone rubber composition and a silicon rubber hardening product, and to the addition hardening-type silicone rubber composition having high tear strength and excellent molding stability being suitable for food or medical care; and the silicon rubber hardening product. More specifically, the present invention provides: the addition hardening-type silicone rubber composition comprising, based on 100 parts by weight of vinyl silicone gum having 0.01-8.5 mol% of vinyl group content: 10-100 parts by weight of reinforcing silica having at least 200 m^2/g of specific surface area by the Brunauer-Emmett-Teller (BET) method; 0.1-1.0 parts by weight of an organic silane compound; 1.0-15.0 parts by weight of low-viscosity processing material having a hydroxy group on both ends thereof and a methyl group or a methyl vinyl group on a side chain; and 0.5-2.0 parts by weight of a hydrogen silicon polymer; and 1-10 ppm of a liquid platinum catalyst indicated by C_8H_18OPtSi_2 based on 100 parts by weight of the addition hardening-type silicone rubber composition of the present invention; and the silicon rubber obtained by hardening using 5-100 ppm of tris (2,4-ditert-butylphenyl) phosphite as a retardant.