Patent US4686242A successfully refreshed from Google Patents.
US4686242A
Expired / Lapsed
US
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Polyurea polymers prepared from urea containing prepolymers
Assignee: Dow Chemical Co
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Filing: 1986-01-31
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Granted: 1987-08-11
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Expires: 2006-01-31
Abstract
Abstract This invention comprises a process whereby an amine functional compound having an equivalent weight of at least about 400 is reacted with an excess of a polyisocyanate to form an isocyanate-terminated prepolymer or quasi prepolymer, which polymer or quasi prepolymer is reacted with an isocyanate-reactive material which is preferably a relatively low equivalent weight polyol or mixture thereof with an additional amount of said amine functional compound or a relatively high equivalent weight polyol to form a polyurea containing polymer which is preferably non-cellular or microcellular.
Inventors
- 👤 Robert B. Turner
- 👤 Richard D. Peffley
- 👤 Raymond A. Plepys
- 👤 Ralph D. Priester
- 👤 Manuel Gonzales, Jr.
- 👤 Kimbley A. Bushman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:46
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5051; C08G18/10; C08G18/30; C08G18/32; C08G18/5024; C08G18/503; C08G2120/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
57 words
A process for preparing a polyurea or polyurea-polyurethane polymer comprising reacting an amine functional compound having an equivalent weight of at least about 400 with an excess of a polyisocyanate to form an isocyanate-terminated prepoymer or quasi-prepolymer, and then reacting said isocyanate-terminated prepolymer or quasi-prepolymer with an isocyanate reactive material to form a polyurea and/or polyurea-polyurethane polymer.
Claim 2
Dependent Claim
57 words
A process for preparing a polyurea or polyurea-polyurethane polymer comprising reacting an amine functional compound having an equivalent weight of at least about 400 with an excess of a polyisocyanate to form an isocyanate-terminated prepoymer or quasi-prepolymer, and then reacting said isocyanate-terminated prepolymer or quasi-prepolymer with an isocyanate reactive material to form a polyurea and/or polyurea-polyurethane polymer.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein said amine functional compound has an average equivalent weight of about 500-3000 and contains about 1-4 amine groups per molecule.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein the amine-functional compound is an amine-terminated polyether.
Claim 5
Dependent Claim
15 words
The process of claim 3 wherein said amine functional compound contains terminal primary amine groups.
Claim 6
Dependent Claim
12 words
The process of claim 4 wherein the polyisocyanate is an aliphatic polyisocyanate.
Claim 7
Dependent Claim
33 words
The process of claim 4 wherein the polyisocyanate comprises an aromatic polyisocyanate containing at least one moderately reactive isocyanate group, and the degree of amination of the amine functional compound is about 25-75%.
Claim 8
Dependent Claim
29 words
The process of claim 4 wherein the polyisocyanate is an aromatic polyisocyanate containing highly reactive isocyanate groups and the amine-functional compound has a degree of amination of about 25-80%.
Claim 9
Dependent Claim
15 words
The process of claim 3 wherein said amine-functional compound contains terminal aliphatic secondary amine groups.
Claim 10
Dependent Claim
30 words
The process of claim 8 wherein said polyisocyanate contains at least one moderately reactive aromatic isocyanate group and the amine functional compound has a degree of amination of about 25-80%.
Claim 11
Dependent Claim
25 words
The process of claim 8 wherein said polyisocyanate contains highly reactive isocyanate groups and the amine-terminated compound has a degree of amination of about 25-70%.
Claim 12
Dependent Claim
16 words
The process of claim 3 wherein said amine functional compound comprises an aromatic amine terminated polyether.
Claim 13
Dependent Claim
12 words
The process of claim 11 wherein said polyisocyanate comprises an aliphatic polyisocyanate.
Claim 14
Dependent Claim
20 words
The process of claim 11 wherein said polyisocyanate comprises an aromatic polyisocyanate containing at least one moderately reactive isocyanate group.
Claim 15
Dependent Claim
33 words
The process of claim 11 wherein said polyisocyanate comprises an aromatic polyisocyanate which does not contain sterically hindered isocyanate groups and wherein the amine-functional material has a degree of amination of about 25-70%.
Claim 16
Dependent Claim
26 words
The process of claim 1, 4, 8 or 11 wherein said isocyanate reactive material comprises a polyol or polyamine having an equivalent weight of about 30-150.
Claim 17
Dependent Claim
30 words
The process of claim 15 wherein said isocyanate reactive material further comprises a polyol or amine-terminated polyether having an equivalent weight of about 400-5000 and a functionality of about 2-3.
Claim 18
Dependent Claim
19 words
The process of claim 15 wherein the prepolymer or quasi-prepolymer has an isocyanate content of about 5-12% by weight.
Claim 19
Dependent Claim
27 words
The process of claim 3 wherein said amine functional material is complexed with an organic acid halide, a phosphorus acid, a halogen acid or an alkyl halide.
Claim 20
Dependent Claim
18 words
The process of claim 3 wherein said prepolymer or quasi-prepolymer is prepared in the presence of benzoyl chloride.
Claim 21
Dependent Claim
30 words
The process of claim 3 wherein said amine functional material is a Michael reaction product of a primary amine terminated polyether and an unsaturated compound containing a carbon-carbon double bond.
Claim 22
Dependent Claim
26 words
The process of claim 20 wherein the unsaturated compound comprises acryonitrile or a C 1 -C 6 alkyl or hydroxylalkyl ester of acrylic or methacrylic acid.
Claim 23
Dependent Claim
24 words
The process of claim 1, 4, 8 or 11 wherein said polyurea and/or polyurethane polymer has an unfilled density of at least 0.8 g/cc.
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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) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |