US4745170A
Expired / Lapsed
US
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Polyurethane elastomers from EO/BO polyether polyols
Assignee: Dow Chemical Co
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Filing: 1985-07-25
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Granted: 1988-05-17
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Expires: 2005-07-25
Abstract
Abstract This invention is a polyurethane and/or polyurea elastomer prepared in the reaction of: (a) an organic polyisocyanate; (b) a chain extender and (c) a polyether having a molecular weight from about 500 to about 10,000, which polyether is a block copolymer of ethylene oxide and butylene oxide comprising an internal poly(EO) block bonded on each side to a poly(BO) block, wherein oxybutylene moieties comprise from about 10 to about 90 percent of the total weight of the polyether.
Inventors
- 👤 Kimbley A. Bushman
- 👤 Michael K. Laughner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:09
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4854; C08G18/4833; C08G18/4837; C08G18/4845; C08G18/50; C08G18/5021; C08G18/5024; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G2120/00; Y; Y10; Y10S; Y10S528/00; Y10S528/904
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
78 words
A polyurethane and/or polyurea elastomer prepared in the reaction of: (a) an organic polyisocyanate; (b) a chain extender and (c) an isocyanate reactive polyether having a molecular weight from about 500 to about 10,000, which polyether is a block copolymer of ethylene oxide and butylene oxide comprising an internal poly(EO) block bonded on each side to a poly(BO) block, wherein said poly(BO) blocks comprise from about 10 to about 90 percent of the total weight of the polyether.
Claim 2
Dependent Claim
78 words
A polyurethane and/or polyurea elastomer prepared in the reaction of: (a) an organic polyisocyanate; (b) a chain extender and (c) an isocyanate reactive polyether having a molecular weight from about 500 to about 10,000, which polyether is a block copolymer of ethylene oxide and butylene oxide comprising an internal poly(EO) block bonded on each side to a poly(BO) block, wherein said poly(BO) blocks comprise from about 10 to about 90 percent of the total weight of the polyether.
Claim 3
Dependent Claim
19 words
The elastomer of claim 1 wherein said polyether contains from about 30 to about 65% by weight oxybutylene moities.
Claim 4
Dependent Claim
23 words
The elastomer of claim 2 wherein said polyether has an internal EO block having a molecular weight of about 600 to about 2000.
Claim 5
Dependent Claim
22 words
The elastomer of claim 3 wherein the chain extender is a C 2 -C 6 alkylene diol, a di- or trialkylene glycol.
Claim 6
Dependent Claim
13 words
The elastomer of claim 3 wherein the chain extender comprises an aromatic diamine.
Claim 7
Dependent Claim
12 words
The elastomer of claim 3 wherein the polyisocyanate is an aromatic polyisocyanate.
Claim 8
Dependent Claim
12 words
The elastomer of claim 3 wherein the polyisocyanate is an aliphatic polyisocyanate.
Claim 9
Dependent Claim
65 words
The elastomer of claim 1 wherein the polyether is represented by the structure ##STR3## wherein A is an active hydrogen containing moiety, R is an inertly substituted alkyl group or hydrogen, In is the residue from a polyhydric initiator, z is a number from about 2-4 and x and n are numbers such that the polyether has a poly(BO) content of about 20-75% by weight.
Claim 10
Dependent Claim
72 words
The elastomer of claim 1 wherein the polyether is represented by the structures II, III, or IV ##STR4## wherein A is an active hydrogen containing moiety, In is the residue from a polyhydric initiator, z is a number from about 2-4, R is an inertly substituted alkyl group or hydrogen and x, y, m and n are numbers such that the block copolymer has a polyol(BO) content of about 20-75% by weight.
Claim 11
Dependent Claim
17 words
The elastomer of claim 8 or 9 where R is hydrogen and A is a hydroxyl group.
Claim 12
Dependent Claim
32 words
The elastomer of claim 10 wherein the chain extender is an alkylene glycol or a di- or trialkylene glycol and the polyisocyanate is p,p'-diphenylmethane diisocyanate or a polymeric or hydrogenated derivative thereof.
Claim 13
Dependent Claim
24 words
The elastomer of claim 11 wherein the chain extender is present in an amount from about 10-40 parts per 100 parts of the polyether.
Claim 14
Dependent Claim
20 words
The elastomer of claim 8 or 9 where R is hydrogen and A is a primary or secondary amine group.
Claim 15
Dependent Claim
32 words
The elastomer of claim 13 wherein the chain extender is an alkylene glycol or a di or trialkylene glycol and the polyisocyanate is p,p'-diphenylmethane diisocyanate or a polymeric or hydrogenated derivative thereof.
Claim 16
Dependent Claim
24 words
The elastomer of claim 14 wherein the chain extender is present in an amount from about 10-40 parts per 100 parts of the polyether.
Claim 17
Dependent Claim
15 words
The elastomer of claim 15 wherein the polyether has a molecular weight from about 750-5000.
References Cited (Backward Citations)
US4301110A
Cited
US4371686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |