Patent US2897820A successfully refreshed from Google Patents.
US3862262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lactam-polyol-acyl polyactam terpolymers
Assignee: DSM Rim Nylon VOF
•
Filing: 1973-12-10
•
Granted: 1975-01-21
•
Expires: 1993-12-10
Abstract
Abstract Lactam-polyol-acyl polylactam terpolymers having both ester linkages and amide linkages between the monomeric segments of the terpolymer are disclosed. Also disclosed is a process for preparing the above terpolymers comprising reacting together a lactam, polyol and acryl polylactam in the presence of a basis lactam polymerization catalyst to form a lactam-polyol-acyl polylactam terpolymer.
Inventors
- 👤 Ross Melvin Hendrick
- 👤 James D Gabbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:37
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44; C08G63/00; C08G63/91; C08G69/42
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
22 words
A block terpolymer according to claim 1 wherein the lactam portion of the terpolymer is formed from a lactam of the formula
Claim 2
Dependent Claim
13 words
A block terpolymer according to claim 1 wherein the lactam is epsilon -caprolactam.
Claim 3
Dependent Claim
20 words
A block terpolymer according to claim 1 wherein the polyol portion of the terpolymer is formed from an alkylene glycol.
Claim 4
Dependent Claim
24 words
A block terpolymer according to claim 1 wherein said alkylene glycol is a polyalkylene glycol having a molecular weight of at least about 1,000.
Claim 5
Dependent Claim
14 words
A block terpolymer according to claim 1 wherein said polyalkylene glycol is polyethylene glycol.
Claim 6
Dependent Claim
14 words
A block terpolymer according to claim 1 wherein said polyalkyelen glycol is polypropylene glycol.
Claim 7
Dependent Claim
14 words
A block terpolymer according to claim 1 wherein said polyalkylene glycol is polytetramethylene glycol.
Claim 8
Dependent Claim
19 words
A block terpolymer accOrding to claim 1 wherein the polyol portion of the terpolymer is formed from polybutadiene diol.
Claim 9
Dependent Claim
19 words
A block terpolymer according to claim 1 wherein the polyol portion of the terpolymer is formed from a polyester.
Claim 10
Dependent Claim
13 words
A block terpolymer according to claim 1 wherein said polyester is polycaprolactone diol.
Claim 11
Dependent Claim
22 words
A block terpolymer according to claim 1 wherein the acyl groups of all of said ester and amide linkages are carbonyl groups.
Claim 12
Dependent Claim
17 words
A copolymer according to claim 1 wherein said block terpolymer is of the repeating AB block structure.
Claim 13
Dependent Claim
12 words
A process for preparing lactam-polyol acyl polylactam terpolymers having the general formula:
Claim 14
Dependent Claim
24 words
A process according to claim 14 wherein said polyol and said acyl polylactam are reacted before said lactam is added to the polymerization mixture.
Claim 15
Dependent Claim
26 words
A process according to claim 14 wherein said polyol and said acyl polylactam are reacted before said lactam polymerization catalyst is added to the polymerization mixture.
Claim 16
Dependent Claim
26 words
A process according to claim 14 wherein said polymerization catalyst is an alkali metal or alkaline earth metal lactam or a halogenated alkaline earth metal lactam.
Claim 17
Dependent Claim
14 words
A process according to claim 17 wherein said polymerization catalyst is a bromomagnesium lactam.
Claim 18
Dependent Claim
14 words
A process according to claim 14 wherein said acyl polylactam is an acyl bis-lactam.
Claim 19
Dependent Claim
29 words
A process according to claim 14 wherein the polymerization reaction of the lactam, polyol and acyl polylactam is carried out at a temperature from about 90* to about 190*C.
Claim 20
Dependent Claim
35 words
A process according to claim 14 wherein the polymerizing is carried out at an initial temperature of about 70* to about 100*C and is increased to about 150* to about 180*C during the polymerization reaction.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |