Process for the preparation of optionally alkoxylated polyorgano

Details Process for the preparation of optionally alkoxylated polyorgano Process for the preparation of optionally alkoxylated polyorgano

1996-01-31

1998-06-16

Ivy, C. Warren

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 19, 556450, C08G 7706

Patent

active

057672164

ABSTRACT:
The present invention relates to the synthesis of optionally alkoxylated polyorganosiloxane (POS) resins by non-hydrolytic condensation. The object is to provide a process which offers the possibility of controlling the crosslinking. This object, inter alia, is achieved by the process according to the invention, which makes provision for carrying out a non-hydrolytic condensation reaction between alkoxysilyl units (Mo1) and halogenosilyl units (Mo2), both of which are carried by identical or different silanes, in the presence of a catalyst of the Lewis acid type, said condensation reaction generating essentially .tbd.Si--O--Si.tbd. linkages and coproducts XR (X=halogen). In this process, the target POS comprise siloxy units D, T and/or Q, or perhaps M, the catalyst is selected from metal compounds or mixtures thereof based on at least one metal belonging to group IIIB, IVB or VB of the periodic table, and the reaction temperature and the initial ratio OR/X are adjusted so that condensation takes place substantially exclusively between the units Mo1 and Mo2, with extreme minimization of secondary condensation between two alkoxy units OR to give the by-product R.sub.2 O.

REFERENCES:
patent: 2485928 (1949-10-01), Servais
patent: 2695307 (1954-11-01), Guillissen et al.
patent: 2731485 (1956-01-01), Wagner et al.

Affiliated with

Also associated with

Rating

Process for the preparation of optionally alkoxylated polyorgano does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of optionally alkoxylated polyorgano, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of optionally alkoxylated polyorgano will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1726848