침강 실리카 및 표면처리 실리카

표면 처리 실리카와 침강 실리카는 폴리머에서 보강, 증점, 침강 제어에 사용되는 미세 합성 비정질 실리카입니다. Precipitated silica is the workhorse reinforcing filler for rubber; surface-treated (hydrophobic) fumed silica is the rheology and anti-settling additive for filled and liquid systems. The dividing line is surface chemistry: a hydrophilic surface bonds water and polar groups, while a silane-treated hydrophobic surface disperses into non-polar resins and rubber. Match the surface to the polymer, not just the particle.

Precipitated silica (CAS 112926-00-8) is the reinforcing filler behind silica-tire technology and a wide range of technical rubber goods. It raises tensile strength, tear resistance, and abrasion resistance, and in tire treads it lowers rolling resistance versus carbon black. The honest trade-off: its hydrophilic surface resists dispersion in non-polar rubber and pushes compound viscosity up, so it is almost always run with a sulfur-functional coupling silane such as TESPT. Specify it where wet grip and rolling resistance matter.

Surface-treated fumed silica (CAS 68909-20-6) carries the same reinforcing structure with a silane-modified, water-repelling surface. That treatment lets it disperse into resins, adhesives, and liquid silicones without absorbing atmospheric moisture, where it builds thixotropic viscosity and stops fillers and pigments from settling. Treated grades cost more than untreated silica and interact less with polar binders. Reserve them for non-polar or moisture-sensitive systems; for aqueous or polar formulations, an untreated hydrophilic grade is usually the better and cheaper choice.

• 타이어 트레드, 산업용 고무 제품, 엘라스토머 컴파운드용 보강 충전제
• 접착제, 실런트, 액상 수지의 요변성 레올로지 및 흘러내림 방지 제어
• 충전 폴리머 및 도료 시스템의 침강 방지·안료 현탁 보조제
• 액상 실리콘 고무(LSR) 및 고점도 실리콘 컴파운드의 보강
• 폴리머 분말 및 마스터배치의 고결 방지·유동성 개선 첨가제

• Hydrophobic treated silica — PubChem
• Precipitated silica — PubChem
• Silica dimethyl silylate — PubChem