Isobutyl Polysilsesquioxane is a resinous material composed of a mixture of three-dimensional siloxane polymers and oligomers with cage structures.
Definition
Isobutyl Polysilsesquioxane is a resinous material composed of a mixture of three-dimensional siloxane polymers and oligomers with cage structures. For the oligomers, each silicon atom in the polysilsesquioxane is connected via oxygen atoms to three other silicon atoms and can be represented by the empirical formulation RSiO3/2 where R represents the isobutyl group. For the larger polymeric polysilsesquioxanes, some of the silicon atoms are not connected to other silicon atoms and instead have a silanol (SiOH) group. Isobutyl Polysilsesquioxane is prepared by the hydrolysis and condensation of 2-methylpropyl trimethoxysilane.
Cosmetic roles
Safety & regulatory references
Reviewed by CIR: Final Report: Safety Assessment of Polysilsesquioxanes as Used in Cosmetics
More data — names, identifiers, properties, test records, literature
Names & identifiers
- CAS No.chemical registry number
- 221326-46-1
- DTXSIDUS EPA chemical ID
- DTXSID40944777
- DTXCIDUS EPA compound ID
- DTXCID801373109
- IUPAC
- 1,3,5,7,9,11,13,15-Octakis(2-methylpropyl)pentacyclo[9.5.1.1~3,9~.1~5,15~.1~7,13~]octasiloxane
- Molecular formula
- C32H72O12Si8
- Molecular weight
- 873.596 g/mol
What products actually use it for
What the 1 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.
- Softener and conditioner1
Source: US EPA CompTox dashboard