Patent US4843138A successfully refreshed from Google Patents.
US4843138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyureaurethanes having improved low temperature properties based on high molecular weight polyether intermediates
Assignee: Dow Chemical Co
•
Filing: 1988-02-08
•
Granted: 1989-06-27
•
Expires: 2008-02-08
Abstract
Abstract Improved low temperature properties of polyureaurethane are obtained, such as low glass transition temperatures and reduced bending moduli at -400° C., by the use of relatively high moleuclar weight polyether polyol intermediates. The polyureaurethane is made by reacting the polyether polyol intermediate with a diisocyanate and subsequent cure with a metal halide salt complex of methylenedianiline.
Inventors
- 👤 Joseph H. Tazewell
- 👤 Christopher P. Christenson
- 👤 Robert B. Turner
- 👤 Manuel Gonzales, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:44
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; C08G18/4837; C08G18/4841; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
79 words
A low glass transition temperature polyureaurethane comprising: a polyureaurethane made from (a) a poly(oxypropylene)-based polyol intermediate having a molecular weight of at least about 3,000 and alkyl substituted oxyethylene or oxyethylene repeating units therein, the majority of said polyol being triol, (b) a polyisocyanate, and (c) a metal halide salt complex of methylenedianiline, the molecular weight of said polyether intermediate being an effective molecular weight so that said polyureaurethane has a glass transition temperature of -20° C. or lower.
Claim 2
Dependent Claim
79 words
A low glass transition temperature polyureaurethane comprising: a polyureaurethane made from (a) a poly(oxypropylene)-based polyol intermediate having a molecular weight of at least about 3,000 and alkyl substituted oxyethylene or oxyethylene repeating units therein, the majority of said polyol being triol, (b) a polyisocyanate, and (c) a metal halide salt complex of methylenedianiline, the molecular weight of said polyether intermediate being an effective molecular weight so that said polyureaurethane has a glass transition temperature of -20° C. or lower.
Claim 3
Dependent Claim
42 words
A low glass transition temperature polyureaurethane according to claim 1, wherein said poly(oxypropylene)-based polyol intermediate contains some diol having a molecular weight of from about 2000 to about 9,000, and said triol intermediate has a molecular weight of up to about 10,000.
Claim 4
Dependent Claim
26 words
A low glass transition temperature polyureaurethane according to claim 2, wherein said alkyl substituent of said oxyethylene repeating unit contains from 1 to 4 carbon atoms.
Claim 5
Dependent Claim
81 words
A low glass transition temperature polyureaurethane according to claim 3, wherein said polyisocyanate has the formula (R--(N═C═O) n wherein n is from about 2 to about 4, and wherein R is an aliphatic group having from 2 to about 20 carbon atoms, a cycloaliphatic group having from about 5 to about 20 carbon atoms, an aromatic or an alkyl substituted aromatic group having from 6 to about 20 carbon atoms, and wherein said glass transition temperature is -30° C. or lower.
Claim 6
Dependent Claim
40 words
A low glass transition temperature polyureaurethane according to claim 4, wherein said polyisocyanate is diphenyl diisocyanate, phenylene diisocyanate, bitolylene diisocyanate, naphthalene diisocyanate, diphenylmethane diisocyanate, or toluene diisocyanate, wherein the molecular weight of said diol intermediate is up to about 8,000.
Claim 7
Dependent Claim
23 words
A low glass transition temperature polyureaurethane according to claim 5, wherein said metal halide salt of said methylenedianiline salt complex is sodium chloride.
Claim 8
Dependent Claim
31 words
A low glass transition temperature polyureaurethane according to claim 6, wherein said polyisocyanate is toluene diisocyanate or diphenylmethane diisocyanate, and wherein said poly(oxypropylene)-based polyol intermediate comprises poly(oxypropylene diol and poly(oxypropylene) triol.
Claim 9
Dependent Claim
44 words
A low glass transition temperature polyureaurethane according to claim 7, wherein said diol intermediate has a molecular weight of greater than 7,000, wherein said triol intermediate has a molecular weight greater than 4,000, and wherein said glass transition temperature is -40° C. or lower.
Claim 10
Dependent Claim
46 words
A low glass transition temperature polyureaurethane according to claim 1, wherein said poly(oxypropylene)-based polyol intermediate having alkyl substituted oxyethylene repeating units therein contains ethylene oxide repeating units therein, and wherein said ethylene oxide is said intermediate exists substantially as end blocks on said poly(oxypropylene)-based polyol intermediate.
Claim 11
Dependent Claim
68 words
A low glass transition temperature polyureaurethane according to claim 7, wherein said poly(oxypropylene)-based polyol intermediate having alkyl substituted oxyethylene repeating units therein contains ethylene oxide repeating units therein, and wherein said ethylene oxide in said intermediate exits substantially as end blocks on said poly(oxypropylene)-based polyol intermediate, and wherein the average number of said ethylene oxide units in each said end block is from about 1 to about 20.
Claim 12
Dependent Claim
86 words
A polyureaurethane having a low bending modulus at a low temperature, comprising: a polyureaurethane made from (a) a poly(oxypropylene)-based polyol intermediate having a molecular weight of at least about 3,000 and alkyl substituted oxyethylene or oxyethylene repeating units therein, the majority of said polyol being triol, (b) a polyisocyanate, and (c) a metal halide salt complex of methylenedianiline, the molecular weight of said polyether intermediate being an effective molecular weight so that said polyureaurethane has a bending moduli at -40° C. or 40,000 psi or less.
Claim 13
Dependent Claim
86 words
A polyureaurethane having a low bending modulus at a low temperature, comprising: a polyureaurethane made from (a) a poly(oxypropylene)-based polyol intermediate having a molecular weight of at least about 3,000 and alkyl substituted oxyethylene or oxyethylene repeating units therein, the majority of said polyol being triol, (b) a polyisocyanate, and (c) a metal halide salt complex of methylenedianiline, the molecular weight of said polyether intermediate being an effective molecular weight so that said polyureaurethane has a bending moduli at -40° C. or 40,000 psi or less.
Claim 14
Dependent Claim
22 words
A polyureaurethane according to claim 11 wherein said alkyl substituent of said oxyethylene repeating unit contains from 1 to 4 carbon atoms.
Claim 15
Dependent Claim
99 words
A polyureaurethane according to claim 12, wherein said poly(oxypropylene)-based polyol intermediate contains some diol having a molecular weight of from about 2000 to about 9,000, and said triol intermediate has a molecular weight of up to about 10,000, and wherein said polyisocyanate has the formula R--(N═C═O) n wherein n is from about 2 to about 4, and wherein R is an aliphatic group having from about 2 to about 20 carbon atoms, a cycloaliphatic group having from 5 to about 20 carbon atoms, an aromatic or an alkyl substituted aromatic group having from 6 to about 20 carbon atoms.
Claim 16
Dependent Claim
18 words
A polyureaurethane according to claim 13, wherein said bending moduli is 30,000 psi or less at -40° C.
Claim 17
Dependent Claim
36 words
A polyureaurethane according to claim 14, wherein said polyisocyanate is diphenyl diisocyanate, phenylene diisocyanate, bitolylene diisocyanate, naphthalene diisocyanate, diphenylmethane diisocyanate, or toluene diisocyanate, wherein the molecular weight of said diol intermediate is up to about 8,000.
Claim 18
Dependent Claim
47 words
A polyureaurethane according to claim 15, wherein said metal halide salt of said methylenedianiline salt complex is sodium chloride, and wherein said bending moduli is 20,000 psi or less at -40° C., and wherein said polyether polyol intermediate is poly(oxypropylene) diol, or poly(oxypropylene) triol, or combinations thereof.
Claim 19
Dependent Claim
42 words
A polyureaurethane according to claim 11, wherein said poly(oxypropylene)-based polyol intermediate having alkyl substituted oxyethylene repeating units therein contains ethylene oxide repeating units therein, and wherein said ethylene oxide in said intermediate exists substantially as end blocks on said poly(oxypropylene)-based polyol intermediate.
Claim 20
Dependent Claim
62 words
A polyureaurethane according to claim 14, wherein said poly(oxypropylene)-based polyol having alkyl substituted oxyethylene repeating units therein contains ehtylene oxide repeating units therein, wherein said ethylene oxide contains in said intermediate exists substantially as end blocks on said poly(oxypropylene)-based intermediate polyol, and wherein the average number of ethylene oxide units in each said end block is from about 4 to about 10.
Claim 21
Dependent Claim
68 words
A polyureaurethane according to claim 15, wherein said poly(oxypropylene)-based polyol intermediate having alkyl substituted oxyethylene repeating units therein contains ethylene oxide repeating units therein, wherein said intermediate is a multiple block copolymer of said ethyleneoxide and said poly(oxypropylene)-based polyol or a random copolymer of said ethylene oxide and said poly(oxypropylene)-based polyol and contains from about 8 percent to about 25 percent by weight of ethylene oxide groups therein.
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) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |