Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Patent
1983-11-14
1985-02-12
Garvin, Patrick
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
502202, 502208, B01J 3126
Patent
active
044992009
ABSTRACT:
Using a buffered acid catalyst, a cross-linked urea-formaldehyde polymer matrix is formed by catalyzing an aqueous mixture of an urea-formaldehyde concentrate, urea-formaldehyde resin, and powdered urea. The resulting thermoset polymer which possesses, in part, a cyclic structure, is of unusual hardness and has utility, with or without fillers, as a molding or casting material possessing controllable shrinkage characteristics because of uniform molecular structure and formula versatility. The catalyst system may be used for the polymerization or cure of other urea-formaldehyde or polymeric condensation systems.
REFERENCES:
patent: 2826622 (1958-03-01), Kemp
patent: 3306860 (1967-02-01), Rowell et al.
patent: 3488310 (1970-01-01), McCombs
patent: 3816376 (1974-06-01), Brunnmueller et al.
patent: 3896087 (1975-07-01), Brunnmueller et al.
patent: 4007142 (1977-02-01), Clarke et al.
patent: 4224423 (1980-09-01), Ogden et al.
patent: 4355145 (1982-10-01), Meyer et al.
Goldschmidt, C., "Ueber die Einwirkung von Formaldehyd auf Harnstoff", Ber. dtsch. Chem. Ges., vol. 29, pp. 2438-2439, (1896), Translation encl.
Goldschmidt, C., "Ueber die Einwirkung von Formaldehyd auf Harnstoff", Chemiker-Zeitung, No. 46, p. 460, (1897), Translation enclosed.
Dixon, A. E., "Interaction of Formaldehyde and Carbamide", J. Chem. Soc., 113, pp. 238-248, (1918), Abstract enclosed: C.A. 1459, (1918).
Vale, C. P. and Taylor, W. G. K., Aminoplastics, Iliffe Books Ltd., London, pp. 22-23, (1964).
Saunders, K. J., Organic Polymer Chemistry, Chapman & Hall, London, pp. 304-305.
Reichherzer, R. and Chwala, A., "Condensation Products of Urea and Formaldehyde", 45, Chemical Abstracts 3647(g), (1950).
Chem-Nuclear Systems Inc.
Garvin Patrick
Reynolds Benoni O.
LandOfFree
Compound catalyst system usable for the polymerization or curing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compound catalyst system usable for the polymerization or curing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compound catalyst system usable for the polymerization or curing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1390039