COLD CURABLE ORGANOPOLYSILOXANE COMPOSITION HAVING EXCELLENT FLAME RESISTANCE AND MECHANICAL PROPERTIES, AND PREPARATION METHOD THEREOF

PURPOSE: Provided is a cold curable organopolysiloxane composition, which has excellent flame resistance and mechanical properties such as controlled flowability, while reducing the total amount of fillers used therein. CONSTITUTION: The flame resistant and cold curable organopolysiloxane composition comprises a polysiloxane blocked with a functional group at the end of its molecular chain, a polysiloxane blocked with a non-functional group at the end of its molecular chain, reinforcing fillers, a crosslinking agent, an adhesion promoter and a curing catalyst. The composition further comprises 32.88-55 wt% of an extender filler formed of least one selected from the group consisting of diatomaceous earth, zinc oxide, titanium oxide, asbestos, glass wool, micronized mica, fused silica powder, polystyrene, polyvinyl chloride, polypropylene, aluminum oxide, magnesium oxide and calcium oxide, mixed with 0.1-10 wt% of carbon black. 본 발명은 난연성 실온 경화형 오르가노 폴리실록산 조성물 및 그 제조방법에 관한 것으로서, 분자쇄 말단이 관능기로 차단된 폴리실록산, 분자쇄 말단이 비관능기로 차단된 폴리실록산 및 보강 충전제, 가교제, 접착증진제, 경화촉매 및 증량충전제로 이루어진 우수한 난연특성을 가지면서 흐름성 조절이 우수한 난연성 실온 경화형 오르가노 폴리실록산 조성물 및 그 제조방법에 관한 것이다.