US3915905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-extinguishing phenolic foams
Assignee: Certainteed LLC
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Filing: 1968-05-24
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Granted: 1975-10-28
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Expires: 1988-05-24
Abstract
Abstract Phenol formaldehyde resin foams which do not burn or smoulder and which are self-extinguishing are manufactured by a process in which the phenol formaldehyde condensate is blown in the presence of a nitrogenous additive which is the condensate of formaldehyde with an amine or may be the amine salt of a mild inorganic acid. The smouldering characteristics of prior phenol formaldehyde are overcome.
Inventors
- 👤 Daniel Hanton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:10
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J2361/00; C08J2361/04; C08J2361/06; C08J2361/08; C08J2361/10; C08J2461/00; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
176 words
THE METHOD OF MAKING INCOMBUSTIBLE, NON-SMOLDERING SELF-SUPPORTING INSULATING PHENOL-FORMALDEHYDE RESIN FOAMS WHICH COMPRISES FORMING AN AQUEOUS SOLUTION OF A PHENOL-FORMALDEHYDE RESOLE RESIN BY REACTING PHENOL AND FORMALDEHYDE UNDER CONDITIONS OF TIME, TEMPERATURE AND ALKALINE CATALYSIS TO CAUSE CONDENSATION, INTERRUPTING THE CONDENSATION AT AN INTERMEDIATE POINT NOT GREATLY EXCEEDING 70% TO FORM SAID SOLUTION, INCORPORATING INTO SAID AQUEOUS SOLUTON OF THE RESOLE RESIN A FOAMING AGENT WHICH WILL RELEASE GAS AT OR BELOW THE CURING TEMPERATURE OF SAID RESOLE RESIN, AN ACIDIC HARDENER FOR SAID RESOLE RESIN AND A MINOR AMOUNT OF AN ORGANIC NITROGENEOUS COMPOUND HAVING LITTLE OR NO REACTIVITY WITH FREE FORMALDEHYDE, AND IS STABLE AT THE CURING TEMPERATURE OF SAID RESOLE RESIN, AND WHICH DECOMPOSES WITH THE LIBERATION OF COMBUSTION REPRESENT GAS AT THE TEMPERATURE OF COMBUSTION OR SMOLDERING OF SAID RESIN, SAID ORGANIC NITROGENEOUS COMPOND RESULTING FROM THE REACTION OF FORMALDEHYDE WITH AN ORGANIC AMINATED SUBSTANCE SELECTED FROM THE UREAS, MELAMINES AND DICYANDIAMIDES, HEATING THE AQUEOUS SOLUTION TO CURE SAID RESOLE RESIN AND TO FOAM SAID MIXTURE WITHOUT DECMPOING SAID ORGANIC NITROGENEOUS COMPOUND.
Claim 2
Independent Claim
176 words
THE METHOD OF MAKING INCOMBUSTIBLE, NON-SMOLDERING SELF-SUPPORTING INSULATING PHENOL-FORMALDEHYDE RESIN FOAMS WHICH COMPRISES FORMING AN AQUEOUS SOLUTION OF A PHENOL-FORMALDEHYDE RESOLE RESIN BY REACTING PHENOL AND FORMALDEHYDE UNDER CONDITIONS OF TIME, TEMPERATURE AND ALKALINE CATALYSIS TO CAUSE CONDENSATION, INTERRUPTING THE CONDENSATION AT AN INTERMEDIATE POINT NOT GREATLY EXCEEDING 70% TO FORM SAID SOLUTION, INCORPORATING INTO SAID AQUEOUS SOLUTON OF THE RESOLE RESIN A FOAMING AGENT WHICH WILL RELEASE GAS AT OR BELOW THE CURING TEMPERATURE OF SAID RESOLE RESIN, AN ACIDIC HARDENER FOR SAID RESOLE RESIN AND A MINOR AMOUNT OF AN ORGANIC NITROGENEOUS COMPOUND HAVING LITTLE OR NO REACTIVITY WITH FREE FORMALDEHYDE, AND IS STABLE AT THE CURING TEMPERATURE OF SAID RESOLE RESIN, AND WHICH DECOMPOSES WITH THE LIBERATION OF COMBUSTION REPRESENT GAS AT THE TEMPERATURE OF COMBUSTION OR SMOLDERING OF SAID RESIN, SAID ORGANIC NITROGENEOUS COMPOND RESULTING FROM THE REACTION OF FORMALDEHYDE WITH AN ORGANIC AMINATED SUBSTANCE SELECTED FROM THE UREAS, MELAMINES AND DICYANDIAMIDES, HEATING THE AQUEOUS SOLUTION TO CURE SAID RESOLE RESIN AND TO FOAM SAID MIXTURE WITHOUT DECMPOING SAID ORGANIC NITROGENEOUS COMPOUND.
Claim 3
Dependent Claim
34 words
The method according to claim 1 in which the nitrogeneous compound is the reaction product of partially condensed phenol and formaldehyde with an amino compound of the class consisting of urea, melamine and dicyandiamide.
Claim 4
Dependent Claim
33 words
The method according to claim 1 in which the organic nitrogeneous compound is the condensation product of formaldehyde, an organic amino compound of the class consisting of urea, melamine and dicyandiamide, and phenol.
Claim 5
Dependent Claim
25 words
The method according to claim 1 in which the first step of reacting phenol and formaldehyde includes vinyl alcohol in the mixture which is reacted.
Claim 6
Dependent Claim
27 words
The method according to claim 1 in which the organic nitrogeneous compound is the product of the reaction of formaldehyde and a plurality of said amino compounds.
Claim 7
Dependent Claim
23 words
The method according to claim 1 in which the organic nitrogeneous compound is the product of the reaction of phenol, formaldehyde and dicyandiamide.
Claim 8
Dependent Claim
20 words
The method according to claim 1 in which the organic nitrogeneous compound is the reaction product of formaldehyde and dicyandiamide.
Claim 9
Dependent Claim
91 words
A self-sustaining, hardened, self-extinguishing non-smoldering, insulating foam, of phenol formaldehyde resin containing from 1 to 30 percent by weight of an interreacted formaldehyde-aminoplast which decomposes at high temperature to release gases which do not support combustion, said foam having as its essential component the reaction product of a phenol-formaldehyde resole resin and an organic nitrogeneous compound, which is substantially inert to free formaldehyde, stable at the temperature of curing, said nitrogeneous compound being the reaction product of Formaldehyde and an organic aminated compound of the class of urea, melamines and dicyandiamide.
Claim 10
Dependent Claim
91 words
A self-sustaining, hardened, self-extinguishing non-smoldering, insulating foam, of phenol formaldehyde resin containing from 1 to 30 percent by weight of an interreacted formaldehyde-aminoplast which decomposes at high temperature to release gases which do not support combustion, said foam having as its essential component the reaction product of a phenol-formaldehyde resole resin and an organic nitrogeneous compound, which is substantially inert to free formaldehyde, stable at the temperature of curing, said nitrogeneous compound being the reaction product of Formaldehyde and an organic aminated compound of the class of urea, melamines and dicyandiamide.
Claim 11
Dependent Claim
21 words
Foams according to claim 8 in which the organic nitrogeneous compound is a partial condensate of formaldehyde and said amino compound.
Claim 12
Dependent Claim
22 words
Foams according to claim 8 in which the organic nitrogeneous compound is a co-condensate of phenol, formaldehyde, and said organic amino compound.
References Cited (Backward Citations)
US2019591A
Cited
US2452054A
Cited
US3077458A
Cited
US3004941A
Cited
US3072595A
Cited
US3223668A
Cited
US3434992A
Cited
US3369056A
Cited
US3404198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |