Composition including a siloxane and a method of forming the same
US8222364B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 10, 2007 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Dec 21, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/70
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition includes a siloxane of the formula:(RMe2SiO1/2)a(MeRSiO2/2)b(RSiO3/2)c(SiO4/2)d wherein a is at least 2, b is from 3 to 20, c is from 0 to 10, d is from 0 to 10, and each R is independently of the formula —CR′2—CR′2—Y—Z or CR′2—CR′2—Z, wherein each R′ is independently a hydrogen atom or a C1 to C10 hydrocarbyl free of aliphatic unsaturation so long as at least one R′ is a hydrogen atom, Y is a divalent organic group, and Z is a polycyclic group containing at least one aromatic ring. A method of making the siloxane includes charging (HMe2SiO1/2)a(MeHSiO2/2)b(HSiO3/2)c(SiO4/2)d, a platinum catalyst, and an alkene of the formula CR′2═CR′—Y—Z or CR′2═CR′—Z into a reactor to form the siloxane.The siloxane is useful as a component in holographic storage media for photopolymer-based holographic data storage applications. The siloxane exhibits excellent compatibility when mixed with a polymerizable component before the polymerizable component is cured. Furthermore, the siloxane exhibits excellent diffusion from polymers of the polymerizable component after partial and complete curing. The siloxane also has a high refractive index while maintaining the excellent compatibility …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.