Patent US4696954A successfully refreshed from Google Patents.
US4696954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally stable and high impact resistant structural polyurethane foam
Assignee: Dow Chemical Co
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Filing: 1986-04-23
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Granted: 1987-09-29
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Expires: 2006-04-23
Abstract
Abstract Molded cellular polymers are disclosed which are derived from the reaction of organic polyisocyanates with novel active hydrogen compositions comprising (A) a polyester polyol mixture derived from (i) an aromatic polycarboxylic compound containing two or more carboxylic groups; and (ii) an excess of at least one polyol having from 2 to 8 hydroxyl groups and an equivalent weight of from about 30 to about 250; and (B) from about 5 to about 30 percent by weight of a primary or secondary amine terminated polyether of greater than 1500 molecular weight and amine functionality of from about 2 to about 8. The molded products are characterized by a combination of excellent impact strength and resistance to high temperatures as well as good resistance to burning.
Inventors
- 👤 James R. Pritchard
- 👤 Dale F. Regelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:53
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4018; C08G18/48; C08G18/50; C08G18/5021; C08G18/5024; C08G2110/00; C08G2110/0025; C08G2110/0041; C08G2110/0066; C08G2120/00
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
150 words
A molded cellular polymer which comprises the reaction product obtained by bringing together in the presence of a blowing agent and a urethane forming catalyst, an organic polyisocyanate, a polyol and extender, said polyol and extender being an active hydrogen composition comprising: A. a polyester polyol mixture derived from the reaction of, (i) an aromatic polycarboxylic compound containing two or more carboxylic groups; and (ii) an excess of at least one polyol having from 2 to 8 hydroxyl groups and an equivalent weight of from about 30 to about 250; and B. a primary or secondary amine terminated polyether of greater than 1500 molecular weight and amine functionality of from about 2 to about 8 wherein greater than 50 percent of the active hydrogens are in the form of amine hydrogens, said polyether being present in from about 5 to about 30 percent by weight based on (A) and (B).
Claim 2
Dependent Claim
150 words
A molded cellular polymer which comprises the reaction product obtained by bringing together in the presence of a blowing agent and a urethane forming catalyst, an organic polyisocyanate, a polyol and extender, said polyol and extender being an active hydrogen composition comprising: A. a polyester polyol mixture derived from the reaction of, (i) an aromatic polycarboxylic compound containing two or more carboxylic groups; and (ii) an excess of at least one polyol having from 2 to 8 hydroxyl groups and an equivalent weight of from about 30 to about 250; and B. a primary or secondary amine terminated polyether of greater than 1500 molecular weight and amine functionality of from about 2 to about 8 wherein greater than 50 percent of the active hydrogens are in the form of amine hydrogens, said polyether being present in from about 5 to about 30 percent by weight based on (A) and (B).
Claim 3
Dependent Claim
14 words
A molded polymer according to claim 1 wherein said polyisocyanate comprises an aromatic polyisocyanate.
Claim 4
Dependent Claim
14 words
A molded polymer according to claim 2 wherein said polyisocyanate comprises polymethylene poly(phenyl isocyanate).
Claim 5
Dependent Claim
35 words
A molded polymer according to claim 1 wherein the ratio of equivalents of said polyisocyanate to total active hydrogen equivalents of said (A) and (B) falls within the range of about 0.9:1 to about 1.5:1.
Claim 6
Dependent Claim
17 words
A molded polymer according to claim 4 wherein said ratio is from about 0.95:1 to about 1.15:1.
Claim 7
Dependent Claim
16 words
A molded polymer according to claim 1 wherein said blowing agent comprises a fluorocarbon blowing agent.
Claim 8
Dependent Claim
78 words
A molded polymer according to claim 1 wherein said polyester polyol mixture (A) is derived from the reaction of (i) an aromatic polycarboxylic compound having two to three carboxylic groups and (ii) at least one polyol having from about 2 to about 4 hydroxyl groups and an equivalent weight of from about 30 to about 150 said (ii) being employed in an excess of from about 0.2 mole to about 3 moles per mole of said polycarboxylic compound.
Claim 9
Dependent Claim
38 words
A molded polymer according to claim 1 wherein said (B) is a primary amine terminated polyether having a molecular weight of from about 2000 to about 6000 and an amine functionality of from about 2 to about 3.
Claim 10
Dependent Claim
19 words
A polymer according to claim 1 wherein said molded cellular polymer is produced by the reaction injection molding process.
Claim 11
Dependent Claim
161 words
A molded cellular polymer which comprises the reaction product obtained by bringing together under reaction injection molding conditions: 1. a polymethylene poly(phenyl isocyanate); 2. an active hydrogen composition comprising: A. a polyester polyol mixture derived from the reaction of, (i) an aromatic polycarboxylic compound having two to three carboxylic groups, and (ii) at least one polyol having from about 2 to about 4 hydroxyl groups and an equivalent weight of from about 30 to about 150 and employed in an excess of from about 0.2 mole to about 3 moles per mole of said aromatic polycarboxylic compound (i); and B. from about 5 to about 30 percent by weight based on the combined weight of (A) and (B) of a primary amine terminated polyether having a molecular weight of from about 2000 to about 6000, an amine functionality of from about 2 to about 3 wherein greater than 50 percent of the active hydrogens are in the form of amine hydrogens;
Claim 12
Dependent Claim
161 words
A molded cellular polymer which comprises the reaction product obtained by bringing together under reaction injection molding conditions: 1. a polymethylene poly(phenyl isocyanate); 2. an active hydrogen composition comprising: A. a polyester polyol mixture derived from the reaction of, (i) an aromatic polycarboxylic compound having two to three carboxylic groups, and (ii) at least one polyol having from about 2 to about 4 hydroxyl groups and an equivalent weight of from about 30 to about 150 and employed in an excess of from about 0.2 mole to about 3 moles per mole of said aromatic polycarboxylic compound (i); and B. from about 5 to about 30 percent by weight based on the combined weight of (A) and (B) of a primary amine terminated polyether having a molecular weight of from about 2000 to about 6000, an amine functionality of from about 2 to about 3 wherein greater than 50 percent of the active hydrogens are in the form of amine hydrogens;
Claim 13
Dependent Claim
37 words
a fluorocarbon blowing agent; and 4. a urethane forming catalyst wherein the ratio of equivalents of said polyisocyanate to total active hydrogen equivalents of said (A) and (B) is within the range of about 0.95:1 to 1.15:1.
Claim 14
Dependent Claim
37 words
a fluorocarbon blowing agent; and 4. a urethane forming catalyst wherein the ratio of equivalents of said polyisocyanate to total active hydrogen equivalents of said (A) and (B) is within the range of about 0.95:1 to 1.15:1.
Claim 15
Dependent Claim
25 words
A molded polymer according to claim 10 wherein said (B) has an amine functionality of about 3 and an average molecular weight of about 5000.
Claim 16
Dependent Claim
26 words
A molded polymer according to claim 11 wherein said polyester polyol mixture (A) is derived from terephthalic acid and a mixture of glycerine and dipropylene glycol.
Claim 17
Dependent Claim
45 words
A molded polymer according to claim 11 wherein said polyol mixture (A) is derived from terephthalic acid and a mixture of glycerine, dipropylene glycol, and the triol prepared from the reaction of glycerine with propylene oxide in the molar proportions of 1 to 3, respectively.
Claim 18
Dependent Claim
116 words
An active hydrogen composition comprising a mixture of A. a polyester polyol mixture derived from the reaction of, (i) an aromatic polycarboxylic compound containing two or more carboxylic groups; and (ii) an excess of at least one polyol having from 2 to 8 hydroxyl groups and an equivalent weight of from about 30 to about 250; and B. from about 5 to about 30 percent by weight based on the combined weight of (A) and (B) of a primary or secondary amine terminated polyether of greater than 1500 molecular weight and amine functionality of from about 2 to about 8 wherein greater than 50 percent of the active hydrogens are in the form of amine hydrogens.
Claim 19
Dependent Claim
116 words
An active hydrogen composition comprising a mixture of A. a polyester polyol mixture derived from the reaction of, (i) an aromatic polycarboxylic compound containing two or more carboxylic groups; and (ii) an excess of at least one polyol having from 2 to 8 hydroxyl groups and an equivalent weight of from about 30 to about 250; and B. from about 5 to about 30 percent by weight based on the combined weight of (A) and (B) of a primary or secondary amine terminated polyether of greater than 1500 molecular weight and amine functionality of from about 2 to about 8 wherein greater than 50 percent of the active hydrogens are in the form of amine hydrogens.
Claim 20
Dependent Claim
77 words
A composition according to claim 14 wherein said polyester polyol mixture (A) is derived from the reaction of (i) an aromatic polycarboxylic compound having two to three carboxylic groups and (ii) at least one polyol having from about 2 to about 4 hydroxyl groups and an equivalent weight of from about 30 to about 150 said (ii) being employed in an excess of from about 0.2 mole to about 3 moles per mole of said polycarboxylic compound.
Claim 21
Dependent Claim
37 words
A composition according to claim 15 wherein said (B) is a primary amine terminated polyether having a molecular weight of from about 2000 to about 6000, and an amine functionality of from about 2 to about 3.
Claim 22
Dependent Claim
23 words
A composition according to claim 16 wherein said (B) has an amine functionality of about 3 and an average molecular weight of 5000.
Claim 23
Dependent Claim
25 words
A composition according to claim 17 wherein said polyester polyol mixture (A) is derived from terephthalic acid and a mixture of glycerine and dipropylene glycol.
Claim 24
Dependent Claim
45 words
A composition according to claim 17 wherein said polyester polyol mixture (A) is derived from terephthalic acid and a mixture of glycerine, dipropylene glycol, and the triol prepared from the reaction of glycerine with propylene oxide in the molar proportions of 1 to 3, respectively.
Claim 25
Dependent Claim
22 words
A composition according to claim 14 comprising additionally from about 1 to about 30 percent by weight of a fluorocarbon blowing agent.
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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) | 1990-09-28 | 1991-03-30 | 1991-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-28 | 1995-03-30 | 1995-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-28 | 1999-03-30 | 1999-09-29 | $7700.00 | Window Closed / Lapsed |