High char yield silazane-modified phenolic resins

Details High char yield silazane-modified phenolic resins High char yield silazane-modified phenolic resins

1989-12-08

1992-02-18

Marquis, Melvyn I.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

525393, 524424, 524428, 524439, C08K 338

Patent

active

050895524

ABSTRACT:
The hydrolytic polycondensation of a monomer of ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are independently alkyl groups containing from 1 to 4 carbon atoms, R.sup.a, R.sup.b, R.sup.c, and R.sup.d are independently alkenyl or alkyl groups containing from 2 to 6 carbon atoms with the proviso that at least one of R.sup.a, R.sup.b, R.sup.c, or R.sup.d group is an alkenyl group; can be carried out directly in the presence of a phenolic resin. This in situ polymerization reaction results in the formation of a new family of polysilazoxane-modified phenolic resins. Modified phenolic resins may also be prepared by the controlled hydrolysis of the above monomers in the presence of initiators. The polysilazoxane so formed is blended into a phenolic resin. The organic soluble thermosetting resins exhibit synergistic char yields of 63 to 80 wt. % (1500.degree. C./N.sub.2).

REFERENCES:
patent: 4722988 (1988-02-01), Porte et al.
Effects of Molecular Weight and Cross-Linking on Two Pre-Ceramic Polymers--by Wm. Toreki and Christopher D. Batich.

Affiliated with

Also associated with

Rating

High char yield silazane-modified phenolic resins does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High char yield silazane-modified phenolic resins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High char yield silazane-modified phenolic resins will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1824251