Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1980-12-15
1982-08-17
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
521136, 521181, 521188, 528144, 528164, C08G 1408
Patent
active
043450610
ABSTRACT:
This invention relates to cellular plastic compositions of condensation products of phenol-urea and formaldehyde useful for thermal and acoustical insulation and methods for their preparation in which the phenol is present in amounts of about 1 to about 20 percent by weight wherein the condensation product prior to foaming and setting as a rigid cellular plastic has a viscosity at room temperature of approximately 30 to 36 seconds, No. 1 Zahn cup, and a pH maintained in the range of about 6 to 8.
REFERENCES:
patent: 1678024 (1928-07-01), Terwilliger
patent: 1779551 (1930-10-01), Lougovoy
patent: 1973050 (1934-09-01), Crump
patent: 2205427 (1940-06-01), Loos
patent: 2315087 (1943-03-01), Cuvier
patent: 2616866 (1952-11-01), Juda
patent: 3077458 (1963-02-01), Quelle et al.
patent: 3164559 (1965-01-01), Eberl
patent: 3522196 (1970-07-01), Dorier et al.
patent: 3547868 (1970-12-01), Schwartzenberg et al.
patent: 3869387 (1975-03-01), Vargiu et al.
patent: 3915905 (1975-10-01), Hanton
patent: 4239881 (1980-12-01), Hasselman, Jr.
C.P. Chemical Co., Inc.
Foelak Morton
LandOfFree
Process for the preparation of phenol-urea-formaldehyde condensa 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 the preparation of phenol-urea-formaldehyde condensa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of phenol-urea-formaldehyde condensa will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-187564