18297-88-6

Basic information

• Product Name: Cyclotetrasiloxane, chloroheptamethyl-
• Synonyms: Cyclotetrasiloxane,chloroheptamethyl;Chlor-heptamethyl-cyclotetrasiloxan;2-chloro-2,4,4,6,6,8,8-heptamethylcyclotetrasiloxane;Heptamethyl-chlor-cyclotetrasiloxan;chloro-heptamethyl-cyclotetrasiloxane
• CAS NO: 18297-88-6
• Molecular Formula: C7H21ClO4Si4
• Molecular Weight: 317.036
• Mol File: 18297-88-6.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: Cyclotetrasiloxane, chloroheptamethyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Cyclotetrasiloxane, chloroheptamethyl-(18297-88-6)
• EPA Substance Registry System: Cyclotetrasiloxane, chloroheptamethyl-(18297-88-6)

Safety Data

• Hazardous Substances Data: 18297-88-6(Hazardous Substances Data)

Usage

Description

Cyclotetrasiloxane, chloroheptamethylis an intermediate compound in the synthesis of Heptamethylcyclotetrasiloxan-2-ol (H281305). It is derived from Octamethylcyclotetrasiloxane (O237145), an organometallic reagent that plays a significant role in the preparation of siloxane polymers. Cyclotetrasiloxane, chloroheptamethylis characterized by its high surface-hydrophobicity restoration property, making it a valuable component in various applications.

Uses

Used in Chemical Synthesis:
Cyclotetrasiloxane, chloroheptamethylis used as an intermediate in the synthesis of Heptamethylcyclotetrasiloxan-2-ol (H281305) for its role in creating a derivative of Octamethylcyclotetrasiloxane (O237145). This derivative is essential in the development of organometallic reagents.
Used in Polymer Industry:
Cyclotetrasiloxane, chloroheptamethylis used as a component in the preparation of siloxane polymers for its high surface-hydrophobicity restoration property. This property is crucial in enhancing the performance and durability of the polymers, making them suitable for various applications, such as coatings, adhesives, and sealants.
Used in Surface Coating Applications:
Cyclotetrasiloxane, chloroheptamethylis used as an additive in surface coatings to improve their hydrophobic properties. The high surface-hydrophobicity restoration capability of this compound makes it an ideal choice for creating water-repellent and stain-resistant coatings for various surfaces, including automotive, architectural, and industrial applications.
Used in Adhesive and Sealant Formulations:
Cyclotetrasiloxane, chloroheptamethylis used as a component in adhesive and sealant formulations to enhance their hydrophobic and bonding properties. The high surface-hydrophobicity restoration property of this compound contributes to the improved performance and durability of adhesives and sealants, making them suitable for various applications, such as construction, automotive, and electronics industries.

Upstream product

• 15721-05-8 1,3,3,5,5,7,7-heptamethyl-1,3,5,7-cyclotetrasiloxane 
• 75-79-6 Methyltrichlorosilane 
• 3663-50-1 1,1,3,3,5,5-Hexamethyltrisiloxane-1,5-diol 
• 75-78-5 dimethylsilicon dichloride 

Downstream Products

• 14697-86-0 Acetoxy-heptamethyl-cyclotetrasiloxan 
• 18406-85-4 Heptamethyl-phenoxy-cyclotetrasiloxan 
• 71449-67-7 C₂₀H₆₀O₁₂Si₁₁ 

Relevant articles and documents

Synthesis of high-purity heptamethylchlorocyclotetrasiloxane

The procedures of preparation of heptamethylcyclotetrasiloxane (CH3)7Si4O4H in a 60% yield, its exhaustive purification, and its chlorination to form (CH3)7Si4O4Cl in a quantitative yield were developed. The composition of heptamethylchlorocyclotetrasiloxane and the content of alkali and heavy metal impurities in this compound, permissible for materials used in electronics, were determined by elemental analysis, gas-liquid chromatography, flame photometry, and atomic absorption analysis.

SYNTHESIS OF STEREOREGULAR CYCLOLINEAR METHYLSILOXANE COPOLYMERS WITH VARYING RING SIZE IN THE MACROMOLECULAR CHAIN

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