US5569706A
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US
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Aqueous polyurea dispersions with improved hardness and solvent resistance
Assignee: Bayer Corp
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Filing: 1995-06-02
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Granted: 1996-10-29
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Expires: 2015-06-02
Abstract
Abstract The present invention relates to aqueous polyurea dispersions wherein the polyureas contain 0.1 to 25% by weight, based on the weight of the polyureas, of en-urea groups (calculated as -NH-C(O)-N-, MW 57) obtained by the reaction of an isocyanate group with an aldimine group prepared from a cyclic polyamine containing (cyclo)aliphatically bound amino groups. The present invention also relates to a process for preparing these aqueous polyurea dispersions and to their use for preparing coatings.
Inventors
- 👤 Patricia B. Jacobs
- 👤 Kenneth P. Yonek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:04
CPC Classifications
C; C09; C09D; C09D175/00; C09D175/02; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0838; C08G18/0842; C08G18/0861; C08G18/0866; C08G18/10; C08G18/28; C08G18/2805; C08G18/2815; C08G18/283; C08G18/30; C08G18/32; C08G18/3225; C08G18/3253; C08G18/3256; C08G18/67; C08G18/675; C08G18/677; C08G18/678; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
50 words
An aqueous polyurea dispersion wherein the polyureas contain 0.5 to 25% by weight, based on the weight of the polyureas, of en-urea groups (calculated as --NH--C(O)--N--, MW 57) obtained by the reaction of an isocyanate group with an aldimine group prepared from a cyclic polyamine containing (cyclo)aliphatically bound amino groups.
Claim 2
Dependent Claim
50 words
An aqueous polyurea dispersion wherein the polyureas contain 0.5 to 25% by weight, based on the weight of the polyureas, of en-urea groups (calculated as --NH--C(O)--N--, MW 57) obtained by the reaction of an isocyanate group with an aldimine group prepared from a cyclic polyamine containing (cyclo)aliphatically bound amino groups.
Claim 3
Dependent Claim
47 words
The dispersion of claim 1 wherein said polyureas contain 10 to 120 milliequivalents per 100 grams of polyureas of chemically incorporated anionic groups and up to about 10% by weight, based on the weight of said polyureas, of lateral and/or terminal hydrophilic chains containing ethylene oxide units.
Claim 4
Dependent Claim
21 words
The dispersion of claim 2 wherein at least about 80% of said anionic groups are carboxylate groups neutralized with tertiary amines.
Claim 5
Dependent Claim
69 words
An aqueous polyurea dispersion wherein the polyureas are based on the reaction product of a) an NCO prepolymer containing 0.5 to 25% by weight, based on the weight of the polyurea, of en-urea groups (calculated as --NH--C(O)--N--, MW 57) obtained by the reaction of an isocyanate group with an aldimine group prepared from a cyclic polyamine containing (cyclo)aliphatically bound amino groups with b) an isocyanate-reactive component containing amino groups.
Claim 6
Dependent Claim
69 words
An aqueous polyurea dispersion wherein the polyureas are based on the reaction product of a) an NCO prepolymer containing 0.5 to 25% by weight, based on the weight of the polyurea, of en-urea groups (calculated as --NH--C(O)--N--, MW 57) obtained by the reaction of an isocyanate group with an aldimine group prepared from a cyclic polyamine containing (cyclo)aliphatically bound amino groups with b) an isocyanate-reactive component containing amino groups.
Claim 7
Dependent Claim
47 words
The dispersion of claim 4 wherein said polyureas contain 10 to 120 milliequivalents per 100 grams of polyureas of chemically incorporated anionic groups and up to about 10% by weight, based on the weight of said polyureas, of lateral and/or terminal hydrophilic chains containing ethylene oxide units.
Claim 8
Dependent Claim
21 words
The dispersion of claim 5 wherein at least about 80% of said anionic groups are carboxylate groups neutralized with tertiary amines.
Claim 9
Dependent Claim
118 words
A process for preparing an aqueous polyurea dispersion which comprises A) preparing an NCO prepolymer by reacting an organic polyisocyanate with an aldimine and/or a high molecular weight polyol and optionally an isocyanate-reactive compound containing hydrophilic groups and B) reacting the NCO prepolymer with an aldimine or an isocyanate-reactive compound containing amino groups either prior to, during or after dispersing the NCO prepolymer in water, wherein the aldimine is present in an amount sufficient to incorporate 0.5 to 25% by weight, based on the weight of the polyurea, of en-urea groups (calculated as --NH--C(O)--N--, MW 57) obtained by the reaction of an isocyanate group with an aldimine group prepared from a cyclic polyamine containing (cyclo)aliphatically bound amino groups
Claim 10
Dependent Claim
118 words
A process for preparing an aqueous polyurea dispersion which comprises A) preparing an NCO prepolymer by reacting an organic polyisocyanate with an aldimine and/or a high molecular weight polyol and optionally an isocyanate-reactive compound containing hydrophilic groups and B) reacting the NCO prepolymer with an aldimine or an isocyanate-reactive compound containing amino groups either prior to, during or after dispersing the NCO prepolymer in water, wherein the aldimine is present in an amount sufficient to incorporate 0.5 to 25% by weight, based on the weight of the polyurea, of en-urea groups (calculated as --NH--C(O)--N--, MW 57) obtained by the reaction of an isocyanate group with an aldimine group prepared from a cyclic polyamine containing (cyclo)aliphatically bound amino groups
Claim 11
Dependent Claim
60 words
The process of claim 7 wherein the isocyanate-reactive compound containing hydrophilic groups is present in an amount such that said polyureas contain 10 to 120 milliequivalents, per 100 grams of polyureas, of chemically incorporated anionic groups and up to about 10% by weight, based on the weight of said polyureas, of lateral and/or terminal hydrophilic chains containing ethylene oxide units.
Claim 12
Dependent Claim
21 words
The process of claim 8 wherein at least about 80% of said anionic groups are carboxylate groups neutralized with tertiary amines.
Claim 13
Dependent Claim
19 words
The process of claim 7 wherein said aldimine is prepared from a cyclic diamine containing (cyclo)aliphatically bound amino groups.
Claim 14
Dependent Claim
19 words
The process of claim 8 wherein said aldimine is prepared from a cyclic diamine containing (cyclo)aliphatically bound amino groups.
Claim 15
Dependent Claim
19 words
The process of claim 9 wherein said aldimine is prepared from a cyclic diamine containing (cyclo)aliphatically bound amino groups.
Claim 16
Dependent Claim
116 words
A process for preparing an aqueous polyurea dispersion which comprises A) preparing an NCO prepolymer by reacting an organic polyisocyanate with an aldimine and optionally a high molecular weight polyol and/or an isocyanate-reactive compound containing hydrophilic groups, wherein the aldimine is present in an amount sufficient to incorporate 0.5 to 25% by weight, based on the weight of the polyurea, of en-urea groups (calculated as --NH--C(O)--N--, MW 57) obtained by the reaction of an isocyanate group with an aldimine group prepared from a cyclic polyamine containing (cyclo)aliphatically bound amino groups and B) reacting the NCO prepolymer with an isocyanate-reactive compound containing amino groups or either prior to, during or after dispersing the NCO prepolymer in water.
Claim 17
Dependent Claim
116 words
A process for preparing an aqueous polyurea dispersion which comprises A) preparing an NCO prepolymer by reacting an organic polyisocyanate with an aldimine and optionally a high molecular weight polyol and/or an isocyanate-reactive compound containing hydrophilic groups, wherein the aldimine is present in an amount sufficient to incorporate 0.5 to 25% by weight, based on the weight of the polyurea, of en-urea groups (calculated as --NH--C(O)--N--, MW 57) obtained by the reaction of an isocyanate group with an aldimine group prepared from a cyclic polyamine containing (cyclo)aliphatically bound amino groups and B) reacting the NCO prepolymer with an isocyanate-reactive compound containing amino groups or either prior to, during or after dispersing the NCO prepolymer in water.
Claim 18
Dependent Claim
59 words
The process of claim 13 wherein the isocyanate-reactive compound containing hydrophilic groups is present in an amount such that said polyureas contain 10 to 120 milliequivalents, per 100 grams of polyureas, of chemically incorporated anionic groups and up to about by weight, based on the weight of said polyureas, of lateral and/or terminal hydrophilic chains containing ethylene oxide units.
Claim 19
Dependent Claim
21 words
The process of claim 14 wherein at least about 80% of said anionic groups are carboxylate groups neutralized with tertiary amines.
Claim 20
Dependent Claim
19 words
The process of claim 13 wherein said aldimine is prepared from a cyclic diamine containing (cyclo)aliphatically bound amino groups.
Claim 21
Dependent Claim
19 words
The process of claim 14 wherein said aldimine is prepared from a cyclic diamine containing (cyclo)aliphatically bound amino groups.
Claim 22
Dependent Claim
19 words
The process of claim 15 wherein said aldimine is prepared from a cyclic diamine containing (cyclo)aliphatically bound amino groups.
Claim 23
Dependent Claim
24 words
The dispersion of claim 1 wherein the polyureas contain at least 1.0% by weight, based on the weight of the polyureas, of en-urea groups.
Claim 24
Dependent Claim
24 words
The dispersion of claim 4 wherein the polyureas contain at least 1.0% by weight, based on the weight of the polyureas, of en-urea groups.
Claim 25
Dependent Claim
24 words
The process of claim 7 wherein the polyureas contain at least 1.0% by weight, based on the weight of the polyureas, of en-urea groups.
Claim 26
Dependent Claim
24 words
The process of claim 13 wherein the polyureas contain at least 1.0% by weight, based on the weight of the polyureas, of en-urea groups.
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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) | 1999-10-29 | 2000-04-29 | 2000-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-29 | 2004-04-29 | 2004-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-29 | 2008-04-29 | 2008-10-29 | $7700.00 | Window Closed / Lapsed |