Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1977-10-17
1978-08-22
Welsh, M. J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521156, 521157, 528 75, C08J 900, C08J 908
Patent
active
041088107
ABSTRACT:
Storage-stable solid intermediate products, capable of being foamed and polymerized to cellular highly crosslinked three dimensional ethylenic polymer resin products having amic acid groups and/or cyclic imide linkages, are obtained by inter-reacting, at temperature above the melting point but below about 100.degree. C, a polyisocyanate illustrated by tolylene diisocyanate, a dicarboxylic acid illustrated by maleic or malonic acid, and an unsaturated dicarboxylic acid anhydride illustrated by maleic anhydride, subsequently adding catalyst, surfactant and water while allowing CO.sub.2 to evolve, finally allowing the reaction mixture to solidify. The stable solid, e.g. in the form of granules or powder, can subsequently be shaped, foamed and polymerized by heating to 150.degree.-300.degree. C to provide infusible, insoluble, flame-resistant, rigid cellular resin products having low apparent density.
REFERENCES:
patent: 3249561 (1966-05-01), Hendrix
patent: 3300420 (1967-01-01), Frey
patent: 3310506 (1967-03-01), Amborski et al.
patent: 3380964 (1968-04-01), Grundschober et al.
patent: 3406148 (1968-10-01), Sambeth et al.
patent: 3479305 (1969-11-01), Kus et al.
patent: 3483144 (1969-12-01), Lavin et al.
patent: 3489696 (1970-01-01), Miller
patent: 3533996 (1970-10-01), Grundschober et al.
patent: 3554939 (1971-01-01), Lavin et al.
patent: 3562189 (1971-02-01), Farrissey et al.
patent: 3620987 (1971-11-01), McLaughlin et al.
patent: 3644234 (1972-02-01), Grieve
patent: 3772216 (1973-11-01), Rosser
patent: 3890272 (1975-06-01), D'Alelio
patent: 4001149 (1977-01-01), Scaggs
patent: 4008186 (1977-02-01), Scaggs
patent: 4016114 (1977-04-01), Gruffaz et al.
patent: 4057518 (1977-11-01), Angleraud et al.
The Dow Chemical Company
Welsh M. J.
LandOfFree
Method for making crosslinked resin foams from at least one dica does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for making crosslinked resin foams from at least one dica, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making crosslinked resin foams from at least one dica will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1556910