17704-22-2

Basic information

• Product Name: PENTAVINYLPENTAMETHYLCYCLOPENTASILOXANE
• Synonyms: PENTAVINYLPENTAMETHYLCYCLOPENTASILOXANE;2,4,6,8,10-pentaethenyl-2,4,6,8,10-pentamethyl-cyclopentasiloxan;Pentamethylpentavinylcyclopentasiloxane;2,4,6,8,10-pentamethyl-2,4,6,8,10-pentavinylcyclopentasiloxane;PENTAVINYLPENTAMETHYLCYCLOPENTASILOXANE 95%;2,4,6,8,10-Pentaethenyl-2,4,6,8,10-pentamethylcyclodecanepentasiloxane;Cyclopentasiloxane, 2,4,6,8,10-pentaethenyl-2,4,6,8,10-pentamethyl-;Einecs 241-712-3
• CAS NO: 17704-22-2
• Molecular Formula: C₁₅H₃₀O₅Si₅
• Molecular Weight: 430.82
• EINECS: 241-712-3
• Mol File: 17704-22-2.mol
• Article Data: 4

Chemical Properties

• Melting Point: -140°C
• Boiling Point: 261-262°C
• Flash Point: >120°C
• Appearance: /
• Density: 0,994 g/cm3
• Vapor Pressure: 0.00129mmHg at 25°C
• Refractive Index: 1.4373
• CAS DataBase Reference: PENTAVINYLPENTAMETHYLCYCLOPENTASILOXANE(CAS DataBase Reference)
• NIST Chemistry Reference: PENTAVINYLPENTAMETHYLCYCLOPENTASILOXANE(17704-22-2)
• EPA Substance Registry System: PENTAVINYLPENTAMETHYLCYCLOPENTASILOXANE(17704-22-2)

Safety Data

• Statements: 36/37/38
• Safety Statements: 26-36/37/39
• TSCA: Yes
• Hazardous Substances Data: 17704-22-2(Hazardous Substances Data)

Usage

General Description

Pentavinylpentamethylcyclopentasiloxane is a chemical compound commonly used as a cross-linking agent in the production of silicone polymers and resins. It is a type of cyclosiloxane, which is a class of organosilicon compounds with a cyclic structure. This chemical has five silicon atoms arranged in a ring, with each silicon atom being bonded to five methyl groups and one vinyl group. The vinyl groups of pentavinylpentamethylcyclopentasiloxane allow it to form strong and durable bonds with other chemicals, making it an important ingredient in the production of silicone-based coatings, adhesives, and sealants. It is also known for its heat resistance and water repellent properties, making it useful in a wide range of industrial applications.

InChI:InChI=1/C15H30O5Si5/c1-11-21(6)16-22(7,12-2)18-24(9,14-4)20-25(10,15-5)19-23(8,13-3)17-21/h11-15H,1-5H2,6-10H3

Upstream product

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Relevant articles and documents

Hydrocarbyl the cyclosiloxane preparation method (by machine translation)

The invention discloses a preparation method of alkyl cyclosiloxane. The preparation method is characterized by comprising the following steps: taking alkyl halogenosilane as a raw material, taking crown ether as a solvent and dropping the alkyl halogenosilane in a mixed solution formed by water and the crown ether while continuously stirring the alkyl halogenosilane; carrying out hydrolysis at a certain temperature to carry out condensation polymerization; standing after the reaction to carry out layering; and directly carrying out decompressed rectification on the obtained hydrolyzed oil to separate trialkylcyclotrisiloxane, tetraalkylcyclotetrasiloxane, pentaalkylcyclopentasiloxane and hexaalkylcyclohexasiloxane. The preparation method has the advantages that alcohols and low-boiling point hydrocarbons are not used as solvents, the crown ether is used as solvent and direct rectification is carried out on the prepared hydrolyzed oil to obtain the alkyl cyclosiloxane, so that the processes of washing, neutralization, drying and filtering are saved; and the solvent which undergoes standing and layering after the hydrolysis can be reused or can be cooled to a certain temperature to separate out the crown ether for recovery, so that the production cost is saved.

EFFECT OF HYDROCHLORIC ACID ON RING FORMATION IN HYDROLYTIC POLYCONDENSATION OF DIFUNCTIONAL ORGANOCHLOROSILANES

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