Process for production of multicyanate esters

Details Process for production of multicyanate esters Process for production of multicyanate esters

1995-01-27

1996-01-09

Acquah, Samuel A.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525480, 525509, 524755, 524758, 528232, 528247, 528267, C08G 828

Patent

active

054830133

ABSTRACT:
The present invention is directed to a process of preparing multicyanate esters by: a) reacting an adduct of a tertiary amine and a phenol-formaldehyde oligomer or derivative thereof with cyanogen halide in a solvent reaction medium under conditions to form a reaction product stream containing at least one of the following compounds selected from the group consisting of tertiary amine-hydrohalide salt, solvent, and impurities, and, based upon the total weight of the reaction product stream excluding the weight of said tertiary amine-hydrohalide salt, from about 10 percent to about 40 percent of a multicyanate ester; b) recycling a portion of said reaction product stream into the mixture of step a; and c) separating and recovering said solvent and tertiary amine from said reaction product stream.
The multicyanate ester products produced according to the present invention are useful as bonding agents in friction materials, molding materials, coatings, and adhesives.

REFERENCES:
patent: 3338965 (1965-03-01), Belden et al.
patent: 3966670 (1976-06-01), Grazen et al.
patent: 4022755 (1977-05-01), Tanigaichi et al.
patent: 4069108 (1978-01-01), Riecker
patent: 4218361 (1980-08-01), Searfoss et al.
patent: 4219452 (1980-08-01), Littlefield
patent: 4268157 (1981-05-01), Ebi et al.
patent: 4268657 (1981-05-01), Manzara
patent: 4831086 (1989-05-01), Das et al.
patent: 4970276 (1990-11-01), Das et al.
patent: 4978727 (1990-12-01), Das et al.
patent: 5124414 (1992-06-01), Sajal et al.
patent: 5126412 (1992-06-01), Das et al.
patent: 5137989 (1992-08-01), Das
patent: 5264500 (1993-11-01), Green et al.
patent: 5329061 (1994-07-01), Swift
Chang, et al. "Development of an Azeotropic Distillation Scheme for Purification of Tetrahydrofuran", Fluid Phase Equilibria, vol. 52, (1989), pp. 161-168.
DuPont, "Recovery of THF DuPont Tetrahydrofuran", pp. 1-16 (1984).
Octave Levenspiel, "Chemical Reaction Engineering", John Wiley & Sons, Inc., Second Edition, pp. 93-149 (2nd Ed. 1962).
Perry and Chilton, Chemical Engineers' Handbook, 13-37; 13-39;11-40;18-20; 18-5;18-19;11-39;8-54;6-13;8-61;10-34;19-77;19-78;19-80;19-81;19-47;21-7;2 1-13;21-14;21-19;21-24;21-26 (5th ed. 1973).

Affiliated with

Also associated with

Rating

Process for production of multicyanate esters 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 production of multicyanate esters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for production of multicyanate esters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1303663