US4067833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urethane-modified polyisocyanurate foams from oxyalkylated aniline and aromatic polyisocyanates
Assignee: Dow Chemical Co
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Filing: 1976-03-08
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Granted: 1978-01-10
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Expires: 1996-03-08
Abstract
Abstract Covers novel urethane-modified polyisocyanurate rigid foams comprising the reaction product obtained by bringing together in the presence of a blowing agent an aromatic polyisocyanate, an isocyanurate group formation catalyst, and a polyol comprising a specific alkylene oxide adduct of aniline. The novel foams are useful in preparing rigid foam material such as panels, slabs, or sprayed foam surfaces.
Inventors
- 👤 Thomas H. Austin
- 👤 George P. Speranza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:53
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3271; C08G18/329; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5033; C08G2110/00; C08G2110/0025; C08G2115/00; C08G2115/02; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
66 words
A urethane-modified polyisocyanurate rigid foam comprising the reaction product obtained by bringing together in the presence of a blowing agent an aromatic polyisocyanate, and an isocyanurate group formation catalyst and a polyol comprising an alkylene oxide adduct of aniline prepared by reacting 2.5-15 moles of alkylene oxide per mole of aniline, with the ratio of said polyol to said aromatic polyisocyanate being 0.1-0.8 equivalent: 1.0 equivalent.
Claim 2
Dependent Claim
66 words
A urethane-modified polyisocyanurate rigid foam comprising the reaction product obtained by bringing together in the presence of a blowing agent an aromatic polyisocyanate, and an isocyanurate group formation catalyst and a polyol comprising an alkylene oxide adduct of aniline prepared by reacting 2.5-15 moles of alkylene oxide per mole of aniline, with the ratio of said polyol to said aromatic polyisocyanate being 0.1-0.8 equivalent: 1.0 equivalent.
Claim 3
Dependent Claim
16 words
The rigid foam of claim 1 wherein said polyol is an ethylene oxide adduct of aniline.
Claim 4
Dependent Claim
21 words
The rigid foam of claim 2 wherein said polyol is a propylene oxide or mixed ethylene oxide/propylene oxide adduct of aniline.
Claim 5
Dependent Claim
69 words
A process for preparing a urethane-modified polyisocyanurate rigid foam comprising the steps of mixing and reacting in the presence of a blowing agent and an isocyanurate group formation catalyst an aromatic polyisocyanate and a polyol comprising an alkylene oxide adduct of aniline prepared by reacting 2.5-15 moles of alkylene oxide per mole of aniline, with the ratio of said polyol to said aromatic polyisocyanate being 0.1-0.8 equivalent: 1.0 equivalent.
Claim 6
Dependent Claim
69 words
A process for preparing a urethane-modified polyisocyanurate rigid foam comprising the steps of mixing and reacting in the presence of a blowing agent and an isocyanurate group formation catalyst an aromatic polyisocyanate and a polyol comprising an alkylene oxide adduct of aniline prepared by reacting 2.5-15 moles of alkylene oxide per mole of aniline, with the ratio of said polyol to said aromatic polyisocyanate being 0.1-0.8 equivalent: 1.0 equivalent.
Claim 7
Dependent Claim
15 words
The process of claim 4 wherein said polyol is an ethylene oxide adduct of aniline.
Claim 8
Dependent Claim
20 words
The process of claim 4 wherein said polyol is a propylene oxide or mixed ethylene oxide/propylene oxide adduct of aniline.
References Cited (Backward Citations)
US3644232A
Cited
US3933698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |