Hydrolytically stable urea-formaldehyde resins and process for m

Details Hydrolytically stable urea-formaldehyde resins and process for m Hydrolytically stable urea-formaldehyde resins and process for m

1982-09-10

1983-10-18

Phynes, Lucille M.

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

Synthetic resins

From aldehyde or derivative thereof as reactant

524 27, 524593, 524596, 524597, 524598, 524843, 525399, 528232, 528242, C08G 1212

Patent

active

044106858

ABSTRACT:
A process for preparing a urea-formaldehyde base resin having a F/U molar ratio of 1.0:1-1.2:1, that is hydrolytically stable, which comprises adjusting a formaldehyde solution to a pH of 0.5-2.5, slowly charging urea to said formaldehyde solution while maintaining the temperature at 40.degree.-70.degree. C., neutralizing the reaction mixture after obtaining a Gardner viscosity in the range of T+-V+, then adding the final charge of urea and permitting equilibration.

REFERENCES:
patent: 1790461 (1931-01-01), Cherry
patent: 1865398 (1932-06-01), Goldschmidt et al.
patent: 1889791 (1932-12-01), Pungs et al.
patent: 1982794 (1934-12-01), Dearing
patent: 2056458 (1936-10-01), Howald
patent: 2242484 (1941-05-01), Schroy et al.
patent: 2644806 (1953-07-01), Kise
patent: 2755263 (1956-07-01), Scheuermann
patent: 2766283 (1956-10-01), Darden
patent: 2947750 (1960-08-01), Gerg
patent: 3072456 (1963-01-01), Andrews
patent: 3102108 (1963-08-01), Aebi et al.
patent: 3441539 (1969-04-01), Schafer et al.
patent: 3450659 (1969-06-01), Bondi et al.
patent: 3689463 (1972-09-01), Abramovich et al.
patent: 3896087 (1975-07-01), Brunnmueller et al.
patent: 3920390 (1975-11-01), Petersen et al.
patent: 3959570 (1976-05-01), Jacquelin et al.
patent: 3994850 (1976-11-01), Willegger et al.
patent: 3996190 (1976-12-01), O'Neill et al.
patent: 4021413 (1977-05-01), Eisele
patent: 4032515 (1977-06-01), Blommers et al.
patent: 4058498 (1977-11-01), Bonnet
patent: 4097419 (1978-06-01), Moore
patent: 4119598 (1978-10-01), Pearson
patent: 4247433 (1981-01-01), Schamberg et al.

Affiliated with

Also associated with

Rating

Hydrolytically stable urea-formaldehyde resins and process for m does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydrolytically stable urea-formaldehyde resins and process for m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrolytically stable urea-formaldehyde resins and process for m will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1290579