Overview
Dimethyl Cyclic Siloxane (DMC) is a group of organosilicon compounds characterized by their cyclic molecular structure. These compounds serve as fundamental building blocks in silicone chemistry, particularly in the production of polydimethylsiloxanes (PDMS). The most common variants contain 3-6 silicon atoms per ring (D3-D6), with each silicon atom bonded to two methyl groups and two oxygen atoms. The industrial importance of DMC stems from its role as a monomer in ring-opening polymerization processes. When combined with catalysts, these cyclic compounds can be transformed into linear silicone polymers of varying molecular weights. This versatility makes DMC essential across multiple industries, from cosmetics to automotive manufacturing.
Physical and Chemical Properties
Dimethyl Cyclic Siloxanes exhibit several distinctive physical properties that make them valuable in industrial applications. Their low surface tension (approximately 20 mN/m) and viscosity make them excellent wetting agents. The compounds demonstrate remarkable thermal stability, with decomposition temperatures typically exceeding 250°C, and maintain performance across a wide temperature range (-40°C to 200°C). Chemically, DMC is relatively inert due to the strength of silicon-oxygen bonds. It resists oxidation and shows compatibility with most organic materials. However, the compounds can undergo ring-opening reactions in the presence of strong acids or bases, which is the basis for their polymerization. The specific properties vary slightly among different ring sizes (D3-D6), with smaller rings generally being more reactive.
Main Applications
The primary application of Dimethyl Cyclic Siloxane is as a precursor in silicone polymer production. Approximately 80% of global DMC production is used to manufacture various silicone fluids, elastomers, and resins. In the personal care industry, DMC-derived silicones provide the silky feel in shampoos, conditioners, and skin care products, while also acting as carriers for active ingredients. Industrial applications include use as dielectric fluids, mold release agents, and lubricants in high-temperature environments. The textile industry employs DMC-based treatments to create water-repellent fabrics. In electronics, ultra-pure grades serve as heat transfer fluids and in the production of silicone encapsulants for sensitive components.
Safety and Storage
While Dimethyl Cyclic Siloxane is generally considered low in toxicity, proper handling procedures should be followed. The compounds may cause mild skin irritation upon prolonged contact and should be kept away from eyes. Adequate ventilation is recommended when handling in confined spaces to prevent vapor accumulation. Storage requires attention to moisture control as the material can hydrolyze slowly in the presence of water. Containers should be kept tightly sealed in cool (below 30°C), dry conditions away from direct sunlight. For large quantities, steel or polyethylene containers are preferred. Fire protection measures should be in place as DMC is flammable, with flash points ranging from 45-110°C depending on the specific cyclic structure.
B2B Procurement Guide
When procuring Dimethyl Cyclic Siloxane for industrial applications, buyers should clearly specify the required ring size distribution (D3-D6 content). The purity requirements (typically 99%+ for polymer-grade material) and moisture content (commally <50 ppm) are critical quality parameters. Industrial-scale purchases often involve ISO tank or bulk container shipments, with typical MOQs of 5-20 metric tons. Quality verification should include certificates of analysis for key parameters: cyclic content distribution, purity, water content, and acidity. For specialized applications (electronics, medical), additional testing for metal ion content may be required. Lead times vary by region but typically range from 2-6 weeks for large orders. Consider supplier technical support capabilities, especially for polymerization applications where catalyst systems and process conditions significantly affect product outcomes.
Related Manufacturers
- 主营：特种硅油、低分子羟基硅油、107超高粘度、甲基硅油超高粘度、甲基硅油超低粘度、107超低粘度、乙烯基硅油超高粘度、乙烯基硅油超低粘度
- 主营：全氟三丁胺、异丙醇铝、纳米勃姆石、二苄叉山梨醇、六氟丙烯二聚体、六氟环氧丙烷二聚体、二异戊基硫醚、隐色结晶紫、邻菲罗啉
- 主营：杜仲素、对位酯、丙烯酸酯、二氧化硫脲、二苯基硅二醇、乙基麦芽酚、饲料添加剂、油酸基硬脂酸
- 主营：全氟三丁胺、聚硅氮烷、特种硅油、全氟聚醚二醇、特种硅树脂
- 主营：甘氨酸、甘氨酰、阻燃剂、二甲基环体硅氧烷、甲醇钠、蒽甲酯、十八酸、溴壬烷、肉桂醇、葱油醇、肉桂醛、异丁酯、赖氨酸、叔丁醇、多佐胺、醛试剂、醇酯-12、乙氧基、脯氨酸、牛胆粉、癸酸酯、化合物、氟苯基、敏材料、氨酰胺、扁油酸
- 主营：生物活性玻璃、全氟三丁胺、花椒麻素、二羟基丙酮、2-十一酮、光引发剂、乙酸龙脑酯、羟基磷灰石
- 主营：5-二甲基海因、双盐酸肼
- 主营：凉味剂、聚苯胺、氨基多糖季胺盐、聚二甲基环体硅氧烷、五溴甲苯、2-氟丙烯酸甲酯、巯基丁醇、全氟三丁胺、酒石酸钾、硫代水杨酸
- 主营：乙二胺
- 主营：防水剂、改性硅油、乙烯基硅油、二甲基硅油、低环体低含氢硅油、甲基端含氢硅油、高含氢硅油、水溶性硅油、铂金催化剂、低含氢硅油、纺织柔软剂、氨基硅油、端侧链含氢硅油、硅胶皮革、含氢硅油、端侧乙烯基硅油、电子级别硅油、聚醚改性硅油、乙烯基mq硅树脂、含氢MQ硅树脂、有机硅树脂、端侧低含氢硅油、水性硅树脂乳液、水性耐高温抗涂鸦手感剂
- 主营：MQ硅树脂、有机硅压敏胶、有机硅树脂、201甲基硅油、有机硅离型剂、水性电泳漆、有机硅匀泡剂、有机硅油、有机硅消泡剂、107硅橡胶、耐高温硅树脂、自干型硅树脂、醇酸改性硅树脂、溶剂型MQ硅树脂、粉末型MQ硅树脂、PSA有机硅压敏胶、云母板硅树脂、底面合一阴极电泳漆、水性电泳涂料、聚氨酯软泡硅油、乙烯基硅油、肉制品消泡剂、大粘度107硅橡胶、有机硅流平剂、107室温硫化硅橡胶
- 主营：环氧环己烷、异丙叉丙酮、双乙烯酮、四甲基氢氧化铵、均苯四甲酸二酐、氯甲基三氯硅烷、五水合四甲基氢氧化铵、二苯甲酮、甲基纤维素、甲基丙烯酸十八酯、甲基磺酸、三聚甲醛、双季戊四醇、月桂酸钠、聚硫橡胶、邻氯溴苯、水杨羟肟酸、氨基磺酸、硫氢化钠、吐温、司盘、芥酸pko、pko-e
- 主营：硅树脂、电泳漆、工业消泡剂、甲基硅油、甲基硅树脂、二甲基羟基硅油、食品消泡剂、云母板胶粘剂、有机硅压敏胶、加成型压敏胶、含氢硅油、乙烯基硅油、匀泡剂、流平剂、离型剂、苯基硅树脂、水性硅树脂乳液、MQ硅树脂、加成型有机硅压敏胶、环氧改性有机硅树脂、固体有机硅树脂、乙烯基MQ硅树脂、纯有机硅树脂、自干有机硅树脂、有机硅中间体
- 主营：硫酸铝、硫酸铁、除草剂、草酸二水合物、二硫氰基甲烷、甲基天冬氨酸、芥花籽油、全氟萘烷、桂花精油、乳清酸锂、分析试剂、无色液体、香精香料、农药中间体、淡黄色液体、巯基乙酸钙、化工催化剂、乙酰基六肽、医药中间体、表面活性剂、香料化合物、三硫代碳酸钠、精胺四盐酸盐、苯乙烯化苯酚、硫脲类促进剂
- 主营：苯甲醛、添加剂、赖氨酸、二甲基亚砜、工业级二茂铁、二甲基硅氧烷、二苄基甲酮肟、溴甲基甲基醚、n-甲基吡咯烷酮、六甲基磷酰三胺、双环戊二烯合铁、溴甲醚、催化剂、粘合剂、中间体、液体尿素、化学试剂、三乙醇胺、有机肥料、尿素硝铵、无水三甲胺、国标防腐剂、气相色谱固定液、十五烷基磺酰氯、七氟溴丙烷