In general, XYSIL® 150 is used in RTV silicone sealant; XYSIL® 200 and XYSIL® 300 are used in HTV silicone rubber and LSR. In RTV silicone sealant XYSIL ® fumed silica provides thixotropy and reinforcement for RTV silicone sealants, while its shear-thinning property provides thickening and sag resistance at rest or low shear and thinning at high shear for easy application.
Effect of fumed silica surface area on silicone rubber reinforcement. The results show that all rheological properties of the compounds and mechanical properties of vulcanizates are strongly affected by the silica surface area. With increasing surface area, the viscosity of the compounds and the modulus of the vulcanlzates increase markedly,.
As a silicone rubber filler, precipitated silica is an alternative to fumed silica in silicone rubber compounds by reducing cost and process inefficiencies. In order to provide complete functionality, this web site needs your explicit consent to store browser cookies.
Fumed silica is produced in a ﬂame. Its aggregates tend to be less tightly clustered than those of carbon black, with silanol and nonpolar siloxane groups present on the surface. The main use for fumed silica is to reinforce silicone rubber, since its cost precludes more general application to rubbers.
Jun 01, 1992· High performance precipitated silica equivalent to fumed silica in silicone reinforcement. Compounding was based on a standard formulation consisting of silicone gum (100 phr), Lupersol 101 (0.5 phr) and a heat stabilizer (1 phr). The various combinations tested are summarized in tables 3 and 4.
fumed silica Price Hydrophilic Type 150 /200 /300 /380 Product Description 1.Fumed silica. Fumed silica is the superfine micro-nano fine chemical product, which is divided into hydrophilic type and hydrophobic type in accordance with their different surface treatments. Its appearance is white powder.
CAB-O-SIL Fumed Silica in Silicone Rubber Improves Mechanical Strength. High Temperature Vulcanized (HTV) silicone rubber and Liquid Silicone Rubber (LSR) possess strong mechanical properties in the elastomer product space for use in compression …
Silica fillers for silicone rubber V.M. Kopylov1, E.I. Kostyleva2, I.M. Kostylev2, A.V. Koviazin 3 1State Research Institute for the Chemistry and Technology of Hetero-Organic Compounds, Russian Federation State Scientific Centre, Moscow 2Novomoskovsk Institute of the D.I. Mendeleev Russian Chemical Engineering University, Novomoskovsk 3OOO .
A high-surface area, high-structure fumed silica designed specifically for liquid silicone rubber (LSR) formulations that require elevated mechanical properties coupled with a high level of transparency. The highest surface area fumed silica available, which imparts the highest reinforcement in rubbers.
Silicone Rubber Sealants . Reinforcing Properties of AEROSIL® Fumed Silica and Precipitated Silicas Polyurethane Sealants Particularly Suitable Silicas . silica SIPERNAT® D 10 has proved to be a suitable reinforcing filler and thixotropic agent for polysulphide sealants.