Jinsha Precipitated Silica Manufacturing Co., Ltd. is one of the leading manufacturers and suppliers of silica manufacturers ,silica for silicone rubber in China. With abundant experience, we warmly welcome you to buy high quality products made in China here from our factory. Contact us for more details.
Silica Manufacturers For Silicone Rubber
The structuralization of silicone rubber is a common problem. Silica causes the silicone rubber to be structured, mainly based on the massive hydrogen bonding of silica and high molecular weight polysiloxanes. According to their reinforcing effect,silicone rubber reinforcing filler can be divided into reinforcing filler, and non-reinforcing filler, the former diameter of 10 ~ 50nm, the specific surface area of 70 ~ 400m2 / g, reinforcing The effect is better; the latter is usually 300 ~ 10000nm, the specific surface area below 30m2 / g, the reinforcing effect is poor. Reinforcing silicone filler used mainly refers to the synthesis of silica, also known as white carbon black.
白炭黑对硅橡胶的补强机理被认为有以下二种。
a.
橡胶被填料粒子吸附填料粒子吸附聚合物，
使橡胶分子链段直接固定在填料粒子的附近
或者沿着填料表面定向或被填料聚集体滞留。
b.
橡胶与填料粒子结合填料粒子与聚合物链段结合产生有效的交联以及聚合物缠结了填
料粒子。
基于上述二种作用，使白炭黑对硅橡胶起到补强作用
Silicone rubber on silica reinforcing mechanism is considered to have the following two.
a. Rubber is adsorbed by the filler particles and the filler particles adsorb the polymer so that the rubber molecular segments are directly fixed in the vicinity of the filler particles or oriented along the surface of the filler particles or retained by the filler aggregates.
b. Particle-Binding of Fillers to Fillers, Filler particles combine with polymer segments to provide effective crosslinking and polymer entanglement of filler particles. Based on the above two kinds of roles, make silica play a reinforcing role on the silicone rubber.
Specification:
JS-160
Silica For Silicone Rubber
The structuralization of silicone rubber is a common problem. Silica causes the silicone rubber to be structured, mainly based on the massive hydrogen bonding of silica and high molecular weight polysiloxanes. According to their reinforcing effect ,silicone rubber reinforcing filler can be divided into reinforcing filler, and non-reinforcing filler, the former diameter of 10 ~ 50nm, the specific surface area of 70 ~ 400m2 / g, reinforcing The effect is better; the latter is usually 300 ~ 10000nm, the specific surface area below 30m2 / g, the reinforcing effect is poor. Reinforcing silicone filler used mainly refers to the synthesis of silica, also known as white carbon black.
Silicone rubber on silica reinforcing mechanism is considered to have the following two.
a. Rubber is adsorbed by the filler particles The filler particles adsorb the polymer so that the rubber molecular segments are directly fixed in the vicinity of the filler particles or oriented along the surface of the filler particles or retained by the filler aggregates.
b. Particle-Binding of Fillers to Fillers Filler particles combine with polymer segments to provide effective crosslinking and polymer entanglement of filler particles.
Based on the above two kinds of roles, make silica play a reinforcing role on the silicone rubber.
Specification:
Test Methods | Properties | Units | Target Values (Spec Limits) | Actual Values |
HG/T3065-2008 | Loss on drying (2Hrs,105℃) | % | Max.6.0 | 5.15 |
HG/T3066-2008 | Ignition loss 1000℃ | % | Max.6.0 | 3.90 |
HG/T3072-2008 | DBP absorption value | cm3/g | 2.3-2.6 | 2.48 |
HG/T3067-2008 | pH value (10%aqueous suspension) | — | 6.0-8.0 | 6.58 |
HG/T3062-2008 | SiO2 (Dry Basis) 二氧化硅(干基） | % | Min.96 | 98.4 |
HG/T3073-1999 | BET specific surface area BET比表面积 | m2/g | 140-170 | 148 |
Soluble salt (Na2SO4) 可溶性盐 | % | Max.0.5 | 0.25 | |
Content of Fe 铁含量 | Mg/kg | Max.200 | 145 | |
Average particle size 平均粒径 | μm | - | 13-14 | |
HG/T3064-2008 | 45µm sieve residue | % | Max.0.5 |
＜0.1 |
Packaging:20kgs per PP bag,18MT/40HQ unpalletized,14MT/40HQ palletized.
MOQ:1*40HQ
Delivery Time:15days after receipt of your payment.
Q&A
What is the advantage of precipitated silica used in silicone rubber comparing with fumed silica?
In contrast to silicone rubber compounds reinforced with fumed silica, reinforced with precipitated silica are less mechanically and dielectric properties, especially after damp, are inferior, but heat aging Better performance, the cost of the compound is much lower. When the mechanical strength of the product is not demanding, it can be used to precipitate white silica or fumed silica.
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