Patent US3673130A successfully refreshed from Google Patents.
US3673130A
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Non-punking phenolic foam
Assignee: Union Carbide Corp
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Filing: 1969-04-04
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Granted: 1972-06-27
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Expires: 1989-04-04
Abstract
Abstract Non-punking phenolic foams are obtained by inclusion of certain phosphorus-containing compounds in the reaction mixture. The phosphorus compounds include tris(2-chloroethyl)-phosphate, bis(hydroxymethyl)phosphinic acid, tetrakis(hydroxymethyl)phosphonium chloride, the hydroxyalkyl polyphosphates obtained from the reaction of an alkylene oxide with a polyphosphoric acid, and the adduct of ammonia with phosphorus pentoxide.
Inventors
- 👤 Anthony Joseph Papa
- 👤 William Robert Proops
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:07
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0038; C08J2361/00; C08J2361/04; C08J2361/06; C08J2361/08; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S521/00; Y10S521/907; Y10S521/908; Y10S521/911
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
29 words
A process as claimed in claim 1 wherein the phosphorus compound is bis(hydroxymethyl)phosphinic acid present in a concentration of 5 to 15 parts per hundred parts of resole resin.
Claim 2
Dependent Claim
29 words
A process as claimed in claim 1 wherein the phosphorus compound is tetrakis(hydroxymethyl)phosphonium chloride present in a concentration of 5 to 15 parts per hundred parts of resole resin.
Claim 3
Dependent Claim
77 words
A process as claimed in claim 1 wherein the phosphorus compound is an hydroxylalkyl polyphosphate of the formula: wherein -OR- is the divalent residue of a vicinal epoxide wherein R has from one to 10 carbon atoms, y is a number that has an average value of at least 1 and Z is an HO(RO)y- group or a said hydroxyalkyl polyphosphate being present in a concentration of 10 to 20 parts per hundred parts of resole resin.
Claim 4
Dependent Claim
22 words
A process as claimed in claim 4 wherein the hydroxyalkyl polyphosphate has the formula wherein y has an average value of 1.6.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |