Patent US5872966A successfully refreshed from Google Patents.
US4075151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid, rapid-setting, rigid polyurethanes
Assignee: Dow Chemical Co
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Filing: 1976-05-27
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Granted: 1978-02-21
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Expires: 1996-05-27
Abstract
Abstract Compositions which will rapidly set to produce solid, rigid polyurethanes without the use of a catalyst comprise an amine initiated polyether polyol such as triethanol amine, an organic aromatic polyisocyanate, such as toluene diisocyanate and a liquid modifier compound having a boiling point above about 150° C such as a non-hydroxyl-containing polyoxy-alkylene compound.
Inventors
- 👤 Franciszek Olstowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:59
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; C08L75/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
157 words
A rigid, non-cellular, solid composition having a density of at least 1 g/cc, a percent elongation of less than 100 and which is demoldable within about 5 minutes, without the application of an external source of heat, after admixture of the components of a rapid-setting polyurethane-forming composition, free of catalytic quantities of a catalyst for urethane formation, and comprising A. an amine initiated polyol having an OH equivalent weight of from about 50 to less than about 250; B. an organic aromatic polyisocyanate; C. a liquid modifier compound having a boiling point above about 150° C selected from the group consisting of non-ester-containing non-hydroxyl-containing polyoxyalkylene compounds and mixtures thereof; and wherein components (A) and (B) are present in quantities such that the NCO:OH ratio is from about 0.8:1 to about 1.5:1 and component (C) is employed in quantities of from about 5% to about 60% by weight of the combined weight of components (A), (B) and (C).
Claim 2
Dependent Claim
157 words
A rigid, non-cellular, solid composition having a density of at least 1 g/cc, a percent elongation of less than 100 and which is demoldable within about 5 minutes, without the application of an external source of heat, after admixture of the components of a rapid-setting polyurethane-forming composition, free of catalytic quantities of a catalyst for urethane formation, and comprising A. an amine initiated polyol having an OH equivalent weight of from about 50 to less than about 250; B. an organic aromatic polyisocyanate; C. a liquid modifier compound having a boiling point above about 150° C selected from the group consisting of non-ester-containing non-hydroxyl-containing polyoxyalkylene compounds and mixtures thereof; and wherein components (A) and (B) are present in quantities such that the NCO:OH ratio is from about 0.8:1 to about 1.5:1 and component (C) is employed in quantities of from about 5% to about 60% by weight of the combined weight of components (A), (B) and (C).
Claim 3
Dependent Claim
69 words
The polyurethane composition of claim 1 wherein components (A) and (B) are present in quantities such that the NCO:OH ratio is from about 0.90:1 to about 1.2:1 and component (C) is present in quantities of from about 15% to about 40% by weight of the combined weight of components (A), (B) and (C) and wherein component (A) has an OH equivalent weight of from about 50 to about 200.
Claim 4
Dependent Claim
27 words
The polyurethane composition of claim 2 wherein components (A) and (B) are present in quantities such that the NCO:OH ratio is from about 0.95:1 to about 1.05:1.
Claim 5
Dependent Claim
43 words
The composition of claim 3 wherein component (C) is an adduct of a 1-6 carbon atom alcohol and a vicinal 2 to 4 carbon atom alkylene oxide or mixtures of such oxides said adduct being capped with a 1-3 carbon atom hydrocarbon group.
Claim 6
Dependent Claim
15 words
The composition of claim 4 wherein said alcohol is selected from butanol and allyl alcohol.
Claim 7
Dependent Claim
31 words
The composition of claim 3 wherein component (A) is selected from the group consisting of triethanolamine, an adduct of diethylenetriamine with propylene oxide and an adduct of aminoethylethanolamine with propylene oxide.
Claim 8
Dependent Claim
21 words
The composition of claim 3 wherein component (B) is selected from the group consisting of 2,4-toluenediisocyanate, 2,6-toluenediisocyanate, diphenylmethanediisocyanate and mixtures thereof.
Claim 9
Dependent Claim
10 words
The composition of claim 1 cast as a decorative object.
Claim 10
Dependent Claim
10 words
The composition of claim 1 cast as a furniture component.
Claim 11
Dependent Claim
10 words
The composition of claim 1 cast as a machine component.
Claim 12
Dependent Claim
38 words
The composition of claim 1 wherein Component (A) additionally contains a non-amine initiated polyol having an equivalent weight of less than 200 and the weight ratio of non-amine initiated polyol to amine initiated polyol is less than 2:1.
Claim 13
Dependent Claim
21 words
The composition of claim 11 wherein the weight ratio of non-amine initiated polyol to amine initiated polyol is less than 1:1.
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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) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |