US4491663A
Expired / Lapsed
US
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Trifunctional blocked isocyanate containing an isocyanurate ring
Assignee: EIDP Inc
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Filing: 1984-05-29
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Granted: 1985-01-01
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Expires: 2004-05-29
Abstract
Abstract Novel trifunctinal blocked isocyanates containing an isocyanurate ring and method of preparing are disclosed. Use of blocked isocyanates of invention as crosslinker for aqueous and nonaqueous compositions is also taught.
Inventors
- 👤 Panagiotis I. Kordomenos
- 👤 Andrew H. Dervan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:09
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4294; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/30; C07D251/34; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/80; C08G18/8061
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
129 words
A process for manufacturing pure trifunctional blocked isocyanate compound containing an isocyanurate ring and having the formula ##STR7## wherein R is selected from the group consisting of aliphatic, cycloaliphatic and aromatic groups and combinations thereof and B is the residue of an active hydrogen containing blocking agent, said process comprising: (A) reacting (i) organic diisocyanate represented by the formula OCN--R--NCO and wherein one of the isocyanate groups thereof is more reactive than the other and (ii) sufficient active hydrogen containing blocking agent represented by the formula BH to react substantially all of said more reactive isocyanate groups; and (B) cotrimerizing the reaction product of (A) in the presence of a catalyst such that said isocyanurate ring containing compound is formed by reaction of 3 moles of said blocked diisocyanate.
Claim 2
Dependent Claim
129 words
A process for manufacturing pure trifunctional blocked isocyanate compound containing an isocyanurate ring and having the formula ##STR7## wherein R is selected from the group consisting of aliphatic, cycloaliphatic and aromatic groups and combinations thereof and B is the residue of an active hydrogen containing blocking agent, said process comprising: (A) reacting (i) organic diisocyanate represented by the formula OCN--R--NCO and wherein one of the isocyanate groups thereof is more reactive than the other and (ii) sufficient active hydrogen containing blocking agent represented by the formula BH to react substantially all of said more reactive isocyanate groups; and (B) cotrimerizing the reaction product of (A) in the presence of a catalyst such that said isocyanurate ring containing compound is formed by reaction of 3 moles of said blocked diisocyanate.
Claim 3
Dependent Claim
13 words
A process in accordance with claim 1 wherein R is an aromatic group.
Claim 4
Dependent Claim
13 words
A process in accordance with claim 1 wherein R is a cycloaliphatic group.
Claim 5
Dependent Claim
13 words
A process in accordance with claim 1 wherein R is an aliphatic group.
Claim 6
Dependent Claim
47 words
A process in accordance with claim 1 wherein said active hydrogen containing blocking agent employed in preparation of said pure trifunctional blocked isocyanate is selected from the group consisting of (i) aliphatic, cycloaliphatic and aromatic alkyl monoalcohols, (ii) hydroxy amines, (iii) oximes, (iv) lactams and (v) triazoles.
Claim 7
Dependent Claim
59 words
A process in accordance with claim 1 wherein said organic diisocyanate used in the preparation of said pure trifunctional blocked isocyanate is selected from the group consisting of: 1-isocyanate-1(p-phenyl isocyanato)methane; 1-isocyanate-2(p-phenyl isocyanato)ethane; 4,4'-diisocyanato-2-nitro-biphenyl; and compounds having the formulas ##STR8## wherein R is selected from the group consisting of methyl, ethyl, t-butyl, chloro, bromomethyl, ethoxy, iso-butoxy, isopropyl, trichloromethyl and methoxy.
Claim 8
Dependent Claim
47 words
A process in accordance with claim 6 wherein said active hydrogen containing blocking agent employed in preparation of said pure trifunctional blocked isocyanate is selected from the group consisting of (i) aliphatic, cycloaliphatic and aromatic alkyl monoalcohols, (ii) hydroxy amines, (iii) oximes, (iv) lactams and (v) triazoles.
Claim 9
Dependent Claim
24 words
A process in accordance with claim 1 wherein said organic diisocyanate employed in the preparation of said pure trifunctional blocked isocyanate is toluene diisocyanate.
Claim 10
Dependent Claim
28 words
A process in accordance with claim 8 wherein said active hydrogen containing blocking agent employed in the preparation of said pure trifunctional blocked isocyanate is methyl ethyl ketoxime.
Claim 11
Dependent Claim
26 words
A process in accordance with claim 8 wherein said active hydrogen containing blocking agent employed in the preparation of said pure trifunctional blocked isocyanate is 2-ethylhexanol.
Claim 12
Dependent Claim
24 words
A process in accordance with claim 1 wherein said organic diisocyanate employed in the preparation of said pure trifunctional blocked isocyanate is isophorone diisocyanate.
Claim 13
Dependent Claim
28 words
A process in accordance with claim 11 wherein said active hydrogen containing blocking agent employed in the preparation of said pure trifunctional blocked isocyanate is methyl ethyl ketoxime.
Claim 14
Dependent Claim
26 words
A process in accordance with claim 11 wherein said active hydrogen containing blocking agent employed in the preparation of said pure trifunctional blocked isocyanate is 2-ethylhexanol.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-01-01 | 1988-07-02 | 1989-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-01 | 1992-07-02 | 1993-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-01 | 1996-07-02 | 1997-01-01 | $7700.00 | Window Closed / Lapsed |