Resultant resin from copolymers is highly crosslinked and completely aromatic. Procedure develops polyaryoxysilane structure in situ after the substrate has first been coated with a prepolymer. Resins are useful as protective coatings for metals, ceramics, glass, and other materials that accommodate relatively high curing temperatures

Dunnavant, W. R.

Markle, R. A.

English

NASA Technical Reports Server

October 1971	 Brief 71-10303 
NASA TECH BRIEF 
Marshall Space Flight Center 
NASA Tech Briefs announce new technology derived from the U.S. space program. They are issued to encourage 
commercial application. Tech Briefs are available on a subscription basis from the National Technical Information 
Service, Springfield, Virginia 22151. Requests for individual copies or questions relating to the Tech Brief program may 
be directed to the Technology Utilization Office, NASA, Code KT, Washington, D.C. 20546. 
Coatings from Copolymers of Tetraphenoxysilane

and p,pt-Biphenol 
.
Heat-resistant coatings have been prepared by 
melt-condensing tetraphenoxysilane with p,p I - 
biphenol. The resultant resin is highly crosslinked and 
completely aromatic. The procedure used includes 
developing the polyaryloxysilane structure "in situ" 
after the substrate has first been coated with a pre-
polymer. 
The subject resins are potentially useful as pro-
tective coatings for metals, ceramics, glass, and 
other materials that can accomodate relatively high 
curing temperatures. In their partially polymerized 
forms, they could also be useful as modifier re-
sins, such as phenolics, which are used in laminating 
and molding applications where high temperatures 
and pressures are involved. 
A series of three-dimensional polyaryloxysilane 
structures has been prepared by crosslinking low 
molecular weight phenolic OH-terminated polymers 
with tetra- or tri-phenoxysilanes. Several of these 
cured polymers exhibited good coating properties 
but underwent moderate material losses with pro-
longed exposure in air at 523.15 K (250° Q.
Note: 
The following documentation may be obtained 
from:
National Technical Information Service 
Springfield, Virginia 22151 
Single document price $6.00 
(or microfiche $0.95) 
Reference: 
NASA-CR-85820 (N67-3 1379), Process Devel-
opment and Pilot-Plant Production of 
Silane Pdlymers of Diols 
Patent status: 
Inquiries about obtaining rights for the commercial 
use of this invention may be made to: 
Patent Counsel 
Mail Code A&TS-PAT 
George C. Marshall Space Flight Center 
Marshall Space Flight Center, Alabama 35812 
Source: R. A. Markel and W. R. Dunnavant of

Battelle Memorial Institute

under contract to
Marshall Space Flight Center

(MFS-14947) 
Category 04 
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately ownedrights.
https://ntrs.nasa.gov/search.jsp?R=19710000302 2020-03-17T02:21:38+00:00Z


Coatings from copolymers of tetraphenoxysilane and p,p(1)-biphenol

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