Patent US4021378A successfully refreshed from Google Patents.
US4021378A
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Microcellular foams
Assignee: Atlantic Richfield Co
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Filing: 1975-07-31
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Granted: 1977-05-03
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Expires: 1995-07-31
Abstract
Abstract Microcellular urethane foams are prepared by causing the in situ formation of a urethane polymer from a cyclic nitrile carbonate and a polyol in a matrix of a thermoplastic polymer, preferably a thermoplastic polyurethane. The composition is preferably prepared by mixing the reactant ingredients in the dry powdered state and subsequently heating them in a closed container in the shape of the desired article. The amount of ingredients selected is that which will produce a molded article of the desired density.
Inventors
- 👤 Kurt Charles Frisch
- 👤 Donald Henry Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:08
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/701; C08J9/04; C08J9/06; C08J9/08; C08J2375/00; C08J2375/04; C08J2475/00; Y; Y10; Y10S; Y10S528/00; Y10S528/902
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
125 words
A shelf-stable expandable polyurethane-producing composition comprised of (A) about 100 to 200 parts by weight of a thermoplastic polyurethane having a softening point in the range of about 70°-250° C.; (b) about 20 to 100 parts by weight of a mixture comprised of (1) a cyclic nitrile carbonate having the structural formula ##STR2## wherein R is an organic radical free of reactive hydrogens as determined by the Zerewitinoff test and n is at least 2, and (2) an organic polyol, the relative amounts of (1) and (2) present in the composition being such that the ratio of cyclic nitrile groups to total hydroxyl groups is about 0.7 to 10:1; and (C) 0 to 10%, based on the total weight of (B), of a condensation-rearrangement catalyst.
Claim 2
Dependent Claim
125 words
A shelf-stable expandable polyurethane-producing composition comprised of (A) about 100 to 200 parts by weight of a thermoplastic polyurethane having a softening point in the range of about 70°-250° C.; (b) about 20 to 100 parts by weight of a mixture comprised of (1) a cyclic nitrile carbonate having the structural formula ##STR2## wherein R is an organic radical free of reactive hydrogens as determined by the Zerewitinoff test and n is at least 2, and (2) an organic polyol, the relative amounts of (1) and (2) present in the composition being such that the ratio of cyclic nitrile groups to total hydroxyl groups is about 0.7 to 10:1; and (C) 0 to 10%, based on the total weight of (B), of a condensation-rearrangement catalyst.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein (A) is a thermoplastic polyurethane.
Claim 4
Dependent Claim
9 words
The composition of claim 1 in dry powdered form.
Claim 5
Dependent Claim
15 words
The composition of claim 3 having a particle size of about 10 to 500 microns.
Claim 6
Dependent Claim
17 words
The composition of claim 1 wherein R is a hydrocarbon radical having 2 to 50 carbon atoms.
Claim 7
Dependent Claim
11 words
The composition of claim 5 wherein n is 2 to 6.
Claim 8
Dependent Claim
10 words
The composition of claim 6 wherein (1) is adipodi(nitrile carbonate).
Claim 9
Dependent Claim
22 words
The composition of claim 1 wherein (A) is a thermoplastic polyurethane having a softening point in the range of about 100°-200° C.
Claim 10
Dependent Claim
20 words
The composition of claim 8 wherein (B) is present in an amount of about 40 to 80 parts by weight.
Claim 11
Dependent Claim
25 words
The composition of claim 9 wherein R is a hydrocarbon radical having 2 to 6 carbon atoms and (2) is a polyester-polyol or a polyether-polyol.
Claim 12
Dependent Claim
15 words
The composition of claim 9 wherein (1) is adipodi(nitrile carbonate) and (2) is a diol.
Claim 13
Dependent Claim
133 words
A shelf-stable expandable polyurethane-producing composition comprised of: (A) about 100 to 200 parts by weight of a thermoplastic polyurethane having a softening point in the range of about 100° to 200° C.; (b) about 20 to 100 parts by weight of a polyurethane-producing component comprised of: (1) a cyclic nitrile carbonate having the structural formula ##STR3## wherein R is a hydrocarbon radical containing 1 to 50 carbon atoms and n is 2 to 6; (2) an organic compound containing at least 2 hydroxyl groups per molecule; the relative amounts of 1 and 2 being such that the ratio of cyclic nitrile carbonate groups to total hydroxyl groups present in the reaction mixture is about 0.8 to 1.4:1; and (C) 0 to 10% based on the total weight of (B) of a condensation-rearrangement catalyst.
Claim 14
Dependent Claim
133 words
A shelf-stable expandable polyurethane-producing composition comprised of: (A) about 100 to 200 parts by weight of a thermoplastic polyurethane having a softening point in the range of about 100° to 200° C.; (b) about 20 to 100 parts by weight of a polyurethane-producing component comprised of: (1) a cyclic nitrile carbonate having the structural formula ##STR3## wherein R is a hydrocarbon radical containing 1 to 50 carbon atoms and n is 2 to 6; (2) an organic compound containing at least 2 hydroxyl groups per molecule; the relative amounts of 1 and 2 being such that the ratio of cyclic nitrile carbonate groups to total hydroxyl groups present in the reaction mixture is about 0.8 to 1.4:1; and (C) 0 to 10% based on the total weight of (B) of a condensation-rearrangement catalyst.
Claim 15
Dependent Claim
34 words
The composition of claim 12 wherein (1) is adipodi(nitrile carbonate), (2) is a hydrocarbon polyol, and (C) is present in an amount of about 0.1 to 2%, based on the total weight of (B).
Claim 16
Independent Claim
202 words
A method of producing a shaped, expanded polyurethane article comprising the steps of: (A) preparing a mixture comprised of: (1) about 100 to 200 parts by weight of a thermoplastic polyurethane having a softening point in the range of about 70 to 250° C.; (2) about 50 to 100 parts by weight of a polyurethane-producing component comprised of: (a) a cyclic nitrile carbonate having the structural formula ##STR4## wherein R is a hydrocarbon radical containing 1 to 50 carbon atoms and n is 2 to 6, and (b) an organic compound containing at least 2 hydroxyl groups per molecule, the relative amounts of (a) and (b) being such that the ratio of cyclic nitrile carbonate groups to total hydroxyl groups present in the reaction mixture is about 0.7 to 10:1; and (3) 0 to 10%, based on the total weight of (2), of a condensation-rearrangement catalyst, (B) heating said mixture in a closed container to the temperature at which reaction between (a) and (b) occurs, thereby causing the mixture to expand to fill the container and assume the shape of the container, (C) cooling the expanded composition to below about 100° C., (d) removing the shaped, expanded polyurethane article from the container.
Claim 17
Independent Claim
202 words
A method of producing a shaped, expanded polyurethane article comprising the steps of: (A) preparing a mixture comprised of: (1) about 100 to 200 parts by weight of a thermoplastic polyurethane having a softening point in the range of about 70 to 250° C.; (2) about 50 to 100 parts by weight of a polyurethane-producing component comprised of: (a) a cyclic nitrile carbonate having the structural formula ##STR4## wherein R is a hydrocarbon radical containing 1 to 50 carbon atoms and n is 2 to 6, and (b) an organic compound containing at least 2 hydroxyl groups per molecule, the relative amounts of (a) and (b) being such that the ratio of cyclic nitrile carbonate groups to total hydroxyl groups present in the reaction mixture is about 0.7 to 10:1; and (3) 0 to 10%, based on the total weight of (2), of a condensation-rearrangement catalyst, (B) heating said mixture in a closed container to the temperature at which reaction between (a) and (b) occurs, thereby causing the mixture to expand to fill the container and assume the shape of the container, (C) cooling the expanded composition to below about 100° C., (d) removing the shaped, expanded polyurethane article from the container.
Claim 18
Independent Claim
173 words
A method of producing expanded polyurethane material comprising the steps of: (A) preparing a mixture comprised of: (1) about 100 to 200 parts by weight of a thermoplastic polyurethane having a softening point in the range of about 70° to 250° C.; (2) about 50 to 100 parts by weight of a polyurethane-producing component comprised of: (a) a cyclic nitrile carbonate having the structural formula: ##STR5## wherein R is a hydrocarbon radical containing 1 to 50 carbon atoms and n is 2 to 6; (b) an organic compound containing at least 2 hydroxyl groups per molecule, the relative amounts of (a) and (b) being such that the ratio of cyclic nitrile carbonate groups to total hydroxyl groups present in the reaction mixture is about 0.8 to 1.4:1; and (3) 0 to 10%, based on the total weight of (2), of a condensation-rearrangement catalyst, (B) heating said mixture in the barrel of an extruder to the temperature at which reaction between (a) and (b) occurs, and (C) extruding the heated mixture through a die.
Claim 19
Independent Claim
173 words
A method of producing expanded polyurethane material comprising the steps of: (A) preparing a mixture comprised of: (1) about 100 to 200 parts by weight of a thermoplastic polyurethane having a softening point in the range of about 70° to 250° C.; (2) about 50 to 100 parts by weight of a polyurethane-producing component comprised of: (a) a cyclic nitrile carbonate having the structural formula: ##STR5## wherein R is a hydrocarbon radical containing 1 to 50 carbon atoms and n is 2 to 6; (b) an organic compound containing at least 2 hydroxyl groups per molecule, the relative amounts of (a) and (b) being such that the ratio of cyclic nitrile carbonate groups to total hydroxyl groups present in the reaction mixture is about 0.8 to 1.4:1; and (3) 0 to 10%, based on the total weight of (2), of a condensation-rearrangement catalyst, (B) heating said mixture in the barrel of an extruder to the temperature at which reaction between (a) and (b) occurs, and (C) extruding the heated mixture through a die.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |