US3864320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modification of acrylate polymers by treatment with metal carbonyl
Assignee: Bell and Howell Co
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Filing: 1973-01-22
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Granted: 1975-02-04
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Expires: 1993-01-22
Abstract
Abstract A method of modifying polymers comprises contacting a selected normally non-reactive polymer with a catalyst in an inert atmosphere in a contacting zone. The catalyst comprises a metal carbonyl of a group VIII transition element, the contacting being effected for a time sufficient to change the characteristics of the polymer. Preferably, the carbonyl is selected from the group consisting of iron carbonyl, nickel carbonyl, cobalt carbonyl and mixtures thereof and most preferably iron pentacarbonyl is employed. The polymer contains saturated carbon chains having carboxylic groups. Novel modified polymer products are recovered.
Inventors
- 👤 John H Rolker
- 👤 Thomas C Glasner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:00
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/91; C08G63/914; C08G63/916; C08F; C08F8/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
36 words
A METHOD OF MODIFYING POLYMERS WHICH METHOD COMPRISES CONTACTING A SELECTED NORMALLY NON-REACTIVE THERMOPLASTIC POLYMER WITH A SELECTED CATALYST IN A CONTACTING ZONE, SAID POLYMER BEING A HOMOPOLYMER OR COPOLYMER CONSISTING ESSENTIALLY OF THE STRUCTURAL FORMULA:
Claim 2
Independent Claim
36 words
A METHOD OF MODIFYING POLYMERS WHICH METHOD COMPRISES CONTACTING A SELECTED NORMALLY NON-REACTIVE THERMOPLASTIC POLYMER WITH A SELECTED CATALYST IN A CONTACTING ZONE, SAID POLYMER BEING A HOMOPOLYMER OR COPOLYMER CONSISTING ESSENTIALLY OF THE STRUCTURAL FORMULA:
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein said contacting is effected in an inert atmosphere and wherein said polymer is saturated and normally fully polymerized.
Claim 4
Dependent Claim
24 words
The method of claim 2 wherein said carbonyl is selected from the group consisting of iron carbonyl, cobalt carbonyl, nickel carbonyl and mixtures thereof.
Claim 5
Dependent Claim
11 words
The method of claim 3 wherein said carbonyl comprises iron carbonyl.
Claim 6
Dependent Claim
11 words
The method of claim 4 wherein said carbonyl comprises iron pentacarbonyl.
Claim 7
Dependent Claim
12 words
The method of claim 1 wherein said polymer comprises an acrylic polymer.
Claim 8
Dependent Claim
12 words
The method of claim 3 wherein said polymer comprises an acrylic copolymer.
Claim 9
Dependent Claim
32 words
The method of claim 5 wherein said polymer comprises an acrylic copolymer and wherein said iron pentacarbonyl is in a weight ratio to said copolymer not substantially in excess of about 1:16.
Claim 10
Dependent Claim
30 words
The method of claim 8 wherein said copolymer is a methacrylate copolymer, wherein said inert atmosphere comprises nitrogen, and wherein said copolymer is in a dispersed state during said contacting.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |