New Polyorgansiloxanes Prepared from Silicate Minerals.
Abstract
Previous work has demonstrated the production of polyorganosiloxanes by the direct trimethylsilylation of inorganic mineral silicates. These polyorganosiloxanes have been shown to contain hydroxyl groups directly bonded to silicon. It was initially indicated that these hydroxyls may react with, for example, Ph2PCl, Me3SiCl and CH3COCl to give polyorganosiloxanes with bonded -OPPh2, OSiMe3 or -OCCH3 groups. Further investigation has shown that these reactions are complicated by side reactions involving reorganisation of the siloxane backbone structures. It has also been shown that the hydroxyl content of these polyorganosiloxanes greatly depends on their method of preparation. Current work involves a detailed study of the reorganisation reactions and of methods to produce polyorganosiloxanes with controlled hydroxyl contents. This work, which is expected to be completed in a few months, will then form a firm basis for the production of useful polymeric materials. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1975
- Accession Number
- ADA021691
Entities
People
- B. R. Currell