US4560494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isocyanate functional prepolymers and coating materials based thereon
Assignee: Sherwin Williams Co
•
Filing: 1984-12-27
•
Granted: 1985-12-24
•
Expires: 2004-12-27
Abstract
Abstract A flexibilizing additive compatible with a wide variety of polymeric vehicles is provided wherein the additive comprises the reaction product of (a) an aliphatic polyisocyanate; (b) at least one monofunctional alcohol containing an ether or carboxyl oxygen; and (c) at least one diol. The flexibilizing additive can be combined with a thermoplastic or thermosetting film-forming vehicle to provide improved coating compositions.
Inventors
- 👤 Thomas W. Druetzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:32
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/2815; C08G18/283; C08G18/40; C08G18/62; C08G18/6216; C08G18/622; C08G18/6225; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/8064; C09; C09D; C09D7/00; C09D7/40; C09D7/65; C08L; C08L75/00; C08L75/04; C08L75/08; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
191 words
An isocyanate functional urethane which comprises the reaction product of: (a) an aliphatic polyisocyanate having an average of at least 2.1 isocyanate groups per molecule and selected from the group consisting of the biurets and isocyanurates of linear aliphatic diisocyanates; and (b) at least one monofunctional alcohol having a molecular weight less than about 500 and which is selected from the group consisting of: ##STR11## wherein n is from 1 to about 10; R 1 is an aliphatic radical of 1 to about 12 carbons; R 2 is H or CH 3 ; R 3 and R 4 are independently aliphatic of 1 to about 12 carbons or H; R 5 is an aliphatic radical of 1 to about 8 carbons or nothing; ##STR12## where R 6 is an aliphatic radical of 1 to about 12 carbons; and (c) at least one diol having the formula: ##STR13## wherein R 7 is H or CH 3 and y is from 1 to about 40; wherein the total NCO/OH equivalents ratio is greater than 1.0 and the ratio of OH equivalents from (b) to OH equivalents from (c) ranges from 0.3:1 to 2.0:1.0.
Claim 2
Dependent Claim
191 words
An isocyanate functional urethane which comprises the reaction product of: (a) an aliphatic polyisocyanate having an average of at least 2.1 isocyanate groups per molecule and selected from the group consisting of the biurets and isocyanurates of linear aliphatic diisocyanates; and (b) at least one monofunctional alcohol having a molecular weight less than about 500 and which is selected from the group consisting of: ##STR11## wherein n is from 1 to about 10; R 1 is an aliphatic radical of 1 to about 12 carbons; R 2 is H or CH 3 ; R 3 and R 4 are independently aliphatic of 1 to about 12 carbons or H; R 5 is an aliphatic radical of 1 to about 8 carbons or nothing; ##STR12## where R 6 is an aliphatic radical of 1 to about 12 carbons; and (c) at least one diol having the formula: ##STR13## wherein R 7 is H or CH 3 and y is from 1 to about 40; wherein the total NCO/OH equivalents ratio is greater than 1.0 and the ratio of OH equivalents from (b) to OH equivalents from (c) ranges from 0.3:1 to 2.0:1.0.
Claim 3
Dependent Claim
25 words
The urethane of claim 1 further characterized in that the isocyanate functional urethane has an isocyanate equivalent weight ranging from about 280 to about 4200.
Claim 4
Dependent Claim
19 words
The urethane of claim 1 further characterized in that the total NCO/OH equivalent ratio is from 1/0.5 to 1/0.99.
Claim 5
Dependent Claim
30 words
The urethane of claim 1 further characterized in that the aliphatic polyisocyanate is selected from the group consisting of the biuret of hexamethylene diisocyanate and the isocyanurate of hexamethylene diisocyanate.
Claim 6
Dependent Claim
18 words
The urethane of claim 1 further characterized in that the monofunctional alcohol is ethylene glycol mono butyl ether.
Claim 7
Dependent Claim
131 words
An isocyanate functional urethane which comprises the reaction product of: (a) an aliphatic polyisocyanate selected from the group consisting of the biuret and isocyanurate of hexamethylene diisocyanate; and (b) at least one monofunctional alcohol having a molecular weight less than about 500 and having the structure: ##STR14## wherein n is from 1 to about 10; R 1 is an aliphatic radical of 1 to about 6 carbons; R 2 is H or CH 3 ; and (c) at least one diol having the formula: ##STR15## wherein R 7 is H or CH 3 ; and y is from 1 to about 40; wherein the total NCO/OH equivalents ratio is from 1/0.5 to 1/0.99 and the ratio of OH equivalents from (b) to OH equivalents from (c) ranges from 0.5:1 to 2.0:1.
Claim 8
Dependent Claim
131 words
An isocyanate functional urethane which comprises the reaction product of: (a) an aliphatic polyisocyanate selected from the group consisting of the biuret and isocyanurate of hexamethylene diisocyanate; and (b) at least one monofunctional alcohol having a molecular weight less than about 500 and having the structure: ##STR14## wherein n is from 1 to about 10; R 1 is an aliphatic radical of 1 to about 6 carbons; R 2 is H or CH 3 ; and (c) at least one diol having the formula: ##STR15## wherein R 7 is H or CH 3 ; and y is from 1 to about 40; wherein the total NCO/OH equivalents ratio is from 1/0.5 to 1/0.99 and the ratio of OH equivalents from (b) to OH equivalents from (c) ranges from 0.5:1 to 2.0:1.
Claim 9
Dependent Claim
25 words
The urethane of claim 6 further characterized in that the isocyanate functional urethane has an isocyanate equivalent weight ranging from about 280 to about 4200.
Claim 10
Dependent Claim
18 words
The urethane of claim 6 further characterized in that the monofunctional alcohol is ethylene glycol mono butyl ether.
References Cited (Backward Citations)
US2866774A
Cited
US3012993A
Cited
US3272098A
Cited
US3483167A
Cited
JPS4882029A
Cited
US3784503A
Cited
US3841895A
Cited
US3871911A
Cited
US3875086A
Cited
US4020216A
Cited
US4154891A
Cited
US4222911A
Cited
US4188472A
Cited
US4334033A
Cited
US4419293A
Cited
US4431763A
Cited
US4451600A
Cited
US4439593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |