Patent US4426506A successfully refreshed from Google Patents.
US4426506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha-beta unsaturated ureide polymers, method for making same and cured elastomers produced therefrom
Assignee: PRC Desoto International Inc
•
Filing: 1982-09-16
•
Granted: 1984-01-17
•
Expires: 2002-09-16
Abstract
Abstract A liquid, highly reactive alpha-beta ureide having the formula: ##STR1## wherein R is a polymeric backbone having no groups reactive with alpha-beta unsaturated amides, n is from 2 to 4 and R 1 is hydrogen, lower alkyl or halogen, the cured elastomer resulting therefrom, and a method for making same.
Inventors
- 👤 Fernando E. Blanco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:30
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C08G18/83; C08G18/837
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
124 words
A method for producing a highly reactive liquid alpha-beta unsaturated ureide polymer having two to four terminal ureide groups which comprises: forming a reaction mixture consisting essentially of (a) a liquid polymer reactant having two to four reactive isocyanate groups but no other groups reactive with alpha-beta unsaturated amides and having the formula R--(NCO) n wherein n is from 2 to 4 and R is the polymeric backbone of the polymeric reactant and (b) an alpha-beta unsaturated amide reactant having the formula: ##STR5## wherein R 1 is hydrogen, lower alkyl or halogen and heating said reaction mixture to a temperature sufficient to cause reaction between said polymer reactant and said alpha-beta unsaturated amide reactant and maintaining said temperature until the reaction is substantially complete.
Claim 2
Independent Claim
124 words
A method for producing a highly reactive liquid alpha-beta unsaturated ureide polymer having two to four terminal ureide groups which comprises: forming a reaction mixture consisting essentially of (a) a liquid polymer reactant having two to four reactive isocyanate groups but no other groups reactive with alpha-beta unsaturated amides and having the formula R--(NCO) n wherein n is from 2 to 4 and R is the polymeric backbone of the polymeric reactant and (b) an alpha-beta unsaturated amide reactant having the formula: ##STR5## wherein R 1 is hydrogen, lower alkyl or halogen and heating said reaction mixture to a temperature sufficient to cause reaction between said polymer reactant and said alpha-beta unsaturated amide reactant and maintaining said temperature until the reaction is substantially complete.
Claim 3
Dependent Claim
21 words
A method according to claim 1 wherein said reaction mixture is heated to a temperature of at least about 200° F.
Claim 4
Dependent Claim
22 words
A method according to claim 2 wherein said liquid polymer reactant has a molecular weight of between about 500 and about 20,000.
Claim 5
Dependent Claim
14 words
A method according to claim 3 wherein R 1 is hydrogen or lower alkyl.
Claim 6
Dependent Claim
11 words
A method according to claim 3 wherein R 1 is halogen.
Claim 7
Dependent Claim
13 words
A method according to claim 5 wherein R 1 is chlorine or bromine.
Claim 8
Dependent Claim
11 words
A method according to claim 4 wherein lower alkyl is methyl.
Claim 9
Dependent Claim
41 words
A liquid highly reactive alpha-beta unsaturated ureide polymer having the formula: ##STR6## wherein R is a polymeric backbone having no groups reactive with alpha-beta unsaturated amides, n is from 2 to 4 and R 1 is hydrogen, lower alkyl or halogen.
Claim 10
Dependent Claim
41 words
A liquid highly reactive alpha-beta unsaturated ureide polymer having the formula: ##STR6## wherein R is a polymeric backbone having no groups reactive with alpha-beta unsaturated amides, n is from 2 to 4 and R 1 is hydrogen, lower alkyl or halogen.
Claim 11
Dependent Claim
17 words
A polymer according to claim 8 wherein the polymer has a molecular weight greater than about 1,000.
Claim 12
Dependent Claim
14 words
A polymer according to claim 9 wherein R 1 is hydrogen or lower alkyl.
Claim 13
Dependent Claim
11 words
A polymer according to claim 9 wherein R 1 is hydrogen.
Claim 14
Dependent Claim
11 words
A polymer according to claim 10 wherein lower alkyl is methyl.
Claim 15
Dependent Claim
13 words
A polymer according to claim 9 wherein R 1 is chlorine or bromine.
Claim 16
Dependent Claim
11 words
The solid cured elastomer of the liquid polymer of claim 8.
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) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |