Patent US4757115A successfully refreshed from Google Patents.
US4757115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoset polymer compositions
Assignee: Ashland LLC
•
Filing: 1986-11-17
•
Granted: 1988-07-12
•
Expires: 2006-11-17
Abstract
Abstract Thermoset polymers are prepared by reacting an ethylenically unsaturated resin monomer and a bicyclic amide acetal with a polyisocyanate in the absence or presence of a vinyl monomer. Reaction rates are suitable for effecting RIM processing. The resultant polymers exhibit improved impact resistance. Further variation in physical properties can be achieved through the use of a diol chain extender for the polyisocyanate.
Inventors
- 👤 Anil B. Goel
- 👤 Timothy A. Tufts
- 👤 Joseph G. Holehouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:08
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3823; C08G18/3825; C08G18/3827; C08G18/67; C08G18/671; C08G18/672; C08G18/68; C08G2120/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
149 words
An interconnected polymer comprising the substantially insoluble and infusible cured polymerization reaction product of (1) a polyisocyanate, (2) a bicyclic amide acetal corresponding to the formula: ##STR4## Wherein R is H or alkyl; R 1 and R 2 is H, alkyl, aryl or alkoxy; and R 3 is alkyl, alkaryl or aryl and (3) a hydroxy group bearing free radically polymerizable ethylenically unsaturated monomer, containing at least one vinyl group of the formula: ##STR5## where Y is ##STR6## R is hydrogen, an alkyl group or an aryl group, R' and R" are independently an alkylene group or an alkylene ether group having from 2 to 10% carbon atoms, and n is an integer from 1 to 10 and therein the isocyanate index of the resin-forming reaction mixture is between about 0.8 and 3 and wherein the relative weight ratio of (2) and (3) is from 1:99 to 50:50, respectively.
Claim 2
Dependent Claim
149 words
An interconnected polymer comprising the substantially insoluble and infusible cured polymerization reaction product of (1) a polyisocyanate, (2) a bicyclic amide acetal corresponding to the formula: ##STR4## Wherein R is H or alkyl; R 1 and R 2 is H, alkyl, aryl or alkoxy; and R 3 is alkyl, alkaryl or aryl and (3) a hydroxy group bearing free radically polymerizable ethylenically unsaturated monomer, containing at least one vinyl group of the formula: ##STR5## where Y is ##STR6## R is hydrogen, an alkyl group or an aryl group, R' and R" are independently an alkylene group or an alkylene ether group having from 2 to 10% carbon atoms, and n is an integer from 1 to 10 and therein the isocyanate index of the resin-forming reaction mixture is between about 0.8 and 3 and wherein the relative weight ratio of (2) and (3) is from 1:99 to 50:50, respectively.
Claim 3
Dependent Claim
43 words
A polymer according to claim 1 wherein component (3) is a linear polymerizable monomer terminated at one end with an acryloyl or methacryloyl group and at the other end with a hydroxyl group and having ethylenic unsaturation in the form of fumaro unsaturation.
Claim 4
Dependent Claim
13 words
A polymer according to claim 2 wherein the polyisocyanate is an aromatic polyisocyanate.
Claim 5
Dependent Claim
18 words
A polymer according to claim 3 wherein the aromatic polyisocyanate is methylene-4, 4'-diphenyl diisocyanate (MDI) or polymeric MDI.
Claim 6
Dependent Claim
14 words
A polymer according to claim 2 wherein the polyisocyanate is a diol extended polyisocyanate.
Claim 7
Dependent Claim
14 words
A polymer according to claim 5 wherein said diol extender is a polyoxyalkylene glyool.
Claim 8
Dependent Claim
16 words
A polymer according to claim 3 wherein said bicyclic amide acetal is tetrahydro-(7a-methyl)-oxazolo [2,3-b ] oxazole.
Claim 9
Dependent Claim
15 words
A polymer according to claim 5 wherein said bicyclic amide acetal is tetrahydro-(7a-methyl)-oxazolo [2,3-b] oxazole.
Claim 10
Dependent Claim
14 words
A polymer according to claim 5 wherein said diol extender is a polyoxyalkylene glycol.
Claim 11
Dependent Claim
15 words
A polymer according to claim 2 wherein said bicyclic amide acetal is tetrahydro-(7a-methyl)-oxazolo [2,3-b] oxazole.
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) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |