Claims
- 1. 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.degree. C selected from the group consisting of
- 1. a liquid partially capped, block or randomly formed polyoxyalkylene compound represented by the general formula ##STR9## wherein each R is independently selected from saturated and unsaturated hydrocarbon groups having from about 1 to about 6 carbon atoms; R.sub.1, R.sub.2, . . . and R.sub.n are independently hydrogen, an aryl group, an alkyl group or haloalkyl group, said alkyl or haloalkyl group having from about 1 to about 2 carbon atoms with the proviso that when R.sub.1, R.sub.2, . . . R.sub.n is a haloalkyl group, it is present in a ratio of from about 0 to about 10 percent of the total R.sub.1, R.sub.2, . . . R.sub.n groups, and x.sub.1, X.sub.2, . . . x.sub.n are integers, the sum of which provides the partially capped polyoxyalkylene compound with a molecular weight of at least about 700;
- 2.
- 2. a liquid, block or randomly formed polyoxyalkylene glycol represented by the general formula ##STR10## wherein R.sub.1, R.sub.2, . . . R.sub.n are as defined in formula I above and x.sub.1, x.sub.2, . . . x.sub.n are integers, the sum of which provides the polyoxyalkylene glycol with an equivalent weight of at least about 700;
- 3.
- 3. a liquid, random or block polyoxyalkylene polyol having a hydroxyl functionality of from 3 to about 8 represented by the general formula ##STR11## wherein R.sub.1, R.sub.2, . . . R.sub.n are as defined in formula I above, Z is the residue of an initiator compound having from 3 to about 8 hydroxyl groups, x.sub.1, x.sub.2, . . . x.sub.n are integers, the sum of which provides the polyoxyalkylene polyol with a hydroxyl equivalent weight of at least about 500 and q is an integer having a value of from 3 to about 8; and
- 4.
- 4. 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). 2. 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. 3. 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. 4. The composition of claim 3 wherein component (C) is an adduct of glycerine with propylene oxide subsequently end-caped with ethylene oxide.
- 5. The composition of claim 3 wherein component (C) is a polyoxybutylene glycol.
- 6. The composition of claim 3 wherein component (C) is an adduct of an unsaturated alcohol with a mixture of propylene oxide and ethylene oxide.
- 7. 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.
- 8. 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.
- 9. The composition of claim 1 cast as a decorative object.
- 10. The composition of claim 1 cast as a furniture component.
- 11. The composition of claim 1 cast as a machine component.
- 12. The composition of claim 1 wherein component (A) additionally contains a non-amine initiated polyol having an equivalent weight of less than about 200 and the weight ratio of non-amine initiated polyol to amine intiated polyol is less than about 2:1.
- 13. The composition of claim 12 wherein the weight ratio of non-amine initiated polyol to amine initiated polyol is less than about 1:1.
Parent Case Info
This application is a continuation of application Ser. No. 574,156, filed May 2, 1975, now U.S. Pat. No. 3,983,068 which is a division of application Ser. No. 405,244, filed Oct. 10, 1973, now U.S. Pat. No. 4,001,166 which is a continuation-in-part of application Ser. No. 327,630, filed Jan. 29, 1973 now abandoned, which is a continuation-in-part of Ser. No. 221,784, filed Jan. 28, 1972 now abandoned.
Divisions (1)
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Number |
Date |
Country |
Parent |
405244 |
Oct 1973 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
574156 |
May 1975 |
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Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
327630 |
Jan 1973 |
|
Parent |
221789 |
Jan 1972 |
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