US3948824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular polymeric masses
Assignee: Ashland LLC
•
Filing: 1974-03-22
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Granted: 1976-04-06
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Expires: 1994-03-22
Abstract
Abstract Heat stable foams in which the cellular material is composed of the cured reaction product of polyisocyanate and solvent-soluble phenolic resin having benzylic ether linkage.
Inventors
- 👤 Janis Robins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:34
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/54; C08G18/542; C08G2101/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
Cellular polymeric masses, the polymeric composition of which comprises the reaction product of a mixture containing a. phenolaldehyde benzylic ether resin comprising the reaction product of a phenol having the general formula: ##SPC4## wherein, A, Y and Z are hydrogen, hydrocarbon radicals, oxyhydrocarbon radicals or halogen, with an aldehyde having the general formula R'CHO, wherein R' is hydrogen or a hydrocarbon radical of 1-8 carbon atoms, at a mole ratio of aldehyde to phenol of greater than 1, in the liquid phase under substantially anhydrous conditions with the removal of water above 100°C. and at temperatures below about 130°C. in the presence of catalytic concentrations of a soluble divalent metal salt dissolved in the reaction medium; b. a polyisocyanate; c. a source of foaming gas.
Claim 2
Dependent Claim
125 words
Cellular polymeric masses, the polymeric composition of which comprises the reaction product of a mixture containing a. phenolaldehyde benzylic ether resin comprising the reaction product of a phenol having the general formula: ##SPC4## wherein, A, Y and Z are hydrogen, hydrocarbon radicals, oxyhydrocarbon radicals or halogen, with an aldehyde having the general formula R'CHO, wherein R' is hydrogen or a hydrocarbon radical of 1-8 carbon atoms, at a mole ratio of aldehyde to phenol of greater than 1, in the liquid phase under substantially anhydrous conditions with the removal of water above 100°C. and at temperatures below about 130°C. in the presence of catalytic concentrations of a soluble divalent metal salt dissolved in the reaction medium; b. a polyisocyanate; c. a source of foaming gas.
Claim 3
Dependent Claim
80 words
The product of claim 1 wherein said phenolaldehyde benzylic ether resin has the general formula: ##SPC5## wherein R is a hydrogen, hydrocarbon radical, oxyhydrocarbon radical or halogen meta to the phenolic hydroxyl group, the sum of m and n is at least 2 and the ratio of m- to -n is at least 1, and X is an end-group selected from the group consisting of hydrogen and methylol with the molar ratio of said methylol-to-hydrogen end-groups being at least 1.
Claim 4
Dependent Claim
30 words
The product of claim 1 wherein said reaction product is the product of reaction of said phenol-aldehyde benzylic ether resin and said polyisocyanate in the presence of tertiary amine catalyst.
Claim 5
Dependent Claim
13 words
The product of claim 2 wherein said polyisocyanate is a liquid aromatic diisocyanate.
Claim 6
Dependent Claim
14 words
The product of claim 4, wherein the aldehyde in said phenol-aldehyde resin is formaldehyde.
Claim 7
Dependent Claim
13 words
The product of claim 2, wherein said source of foaming gas is water.
Claim 8
Dependent Claim
22 words
The product of claim 2 wherein said source of foaming gas is a blowing agent which is vaporized at the reaction temperature.
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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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |