Patent US4217436A successfully refreshed from Google Patents.
US4217436A
Expired / Lapsed
US
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Polyurethane forming compositions
Assignee: Dow Chemical Co
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Filing: 1978-12-11
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Granted: 1980-08-12
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Expires: 1998-12-11
Abstract
Abstract Novel bis cyclic ureas are disclosed having the formula ##STR1## wherein C n H a n represents alkylene from 4 to 12 inclusive and provided there are at least 4 carbon atoms in succession in the chain and R is the residue obtained by the removal of both halogen atoms from a diacid halide. The bis cyclic ureas are easily converted to a novel class of aliphatic diisocyanates simply by heating. Alternatively, they are blended with polymeric polyols to form one-component storage stable compositions which are thermally converted to polyurethane resins without any significant volatile or side product formation.
Inventors
- 👤 Reinhard H. Richter
- 👤 Benjamin W. Tucker
- 👤 Henri Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:31
CPC Classifications
C; C07; C07D; C07D245/00; C07D245/02; C07D243/00; C07D243/04; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/701
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A polyurethane resin prepared by heating a bis cyclic urea having the formula ##STR12## wherein C n H 2n is alkylene from 4 to 12 inclusive and provided there are at least 4 carbon atoms in succession in the chain and R is a divalent radical selected from the group consisting of ##STR13## wherein C x H 2x is alkylene from 1 to 8 inclusive, and ##STR14## with a polymeric polyol at a temperature sufficiently high to cause dissociation of said urea.
Claim 2
Dependent Claim
82 words
A polyurethane resin prepared by heating a bis cyclic urea having the formula ##STR12## wherein C n H 2n is alkylene from 4 to 12 inclusive and provided there are at least 4 carbon atoms in succession in the chain and R is a divalent radical selected from the group consisting of ##STR13## wherein C x H 2x is alkylene from 1 to 8 inclusive, and ##STR14## with a polymeric polyol at a temperature sufficiently high to cause dissociation of said urea.
Claim 3
Dependent Claim
101 words
A storage stable composition capable of forming a polyurethane resin upon heating said composition to a temperature in the range of about 100° C. to about 250° C. which composition comprises a mixture of: (a) a bis cyclic urea having the formula ##STR15## wherein C n H 2n is alkylene from 4 to 12 inclusive and provided there are at least 4 carbon atoms in succession in the chain and R is a divalent radical selected from the group consisting of ##STR16## wherein C x H 2x is alkylene from 1 to 8 inclusive, and ##STR17## and (b) a polymeric polyol.
Claim 4
Dependent Claim
101 words
A storage stable composition capable of forming a polyurethane resin upon heating said composition to a temperature in the range of about 100° C. to about 250° C. which composition comprises a mixture of: (a) a bis cyclic urea having the formula ##STR15## wherein C n H 2n is alkylene from 4 to 12 inclusive and provided there are at least 4 carbon atoms in succession in the chain and R is a divalent radical selected from the group consisting of ##STR16## wherein C x H 2x is alkylene from 1 to 8 inclusive, and ##STR17## and (b) a polymeric polyol.
Claim 5
Dependent Claim
12 words
A storage stable composition according to claim 2 containing a polyurethane catalyst.
Claim 6
Dependent Claim
66 words
A storage stable composition capable of forming a polyurethane resin upon heating said composition to a temperature in the range of about 100° C. to about 250° C. which composition comprises a mixture of: (a) a bis cyclic urea having the formula ##STR18## wherein n is an integer from 4 to 6 inclusive; (b) a polymeric diol; (c) a difunctional extender; and (d) a polyurethane catalyst.
Claim 7
Dependent Claim
66 words
A storage stable composition capable of forming a polyurethane resin upon heating said composition to a temperature in the range of about 100° C. to about 250° C. which composition comprises a mixture of: (a) a bis cyclic urea having the formula ##STR18## wherein n is an integer from 4 to 6 inclusive; (b) a polymeric diol; (c) a difunctional extender; and (d) a polyurethane catalyst.
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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) | 1983-08-12 | 1984-02-11 | 1984-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-12 | 1988-02-11 | 1988-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-12 | 1992-02-11 | 1992-08-12 | $7700.00 | Window Closed / Lapsed |