US4281084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cocontinuous interpenetrating morphological network composition of polymer of methyl methacrylate and polymer of ethylene-vinyl acetate
Assignee: Rohm and Haas Co
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Filing: 1976-11-01
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Granted: 1981-07-28
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Expires: 1996-11-01
Abstract
Abstract Compositions comprising cocontinuous interpenetrating network of a polymer of at least 50 weight percent methyl methacrylate and a polymer of ethylene and vinyl acetate, and process for preparing such compositions comprising polymerizing the major portion below 55° C.
Inventors
- 👤 Robert P. Fellmann
- 👤 Daniel R. Kory
- 👤 William H. Staas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:25
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08F; C08F255/00; C08F255/02; C08F255/026; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L51/00; C08L51/003
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
44 words
A composition comprising a cocontinuous interpenetrating mor phological network of (A) a polymer of at least 50 weight percent methyl methacrylate units and (B) a polymer of ethylene and vinyl acetate, wherein the ratio of (A) to (B) is about 1:0.01 to about 1:1.
Claim 2
Dependent Claim
44 words
A composition comprising a cocontinuous interpenetrating mor phological network of (A) a polymer of at least 50 weight percent methyl methacrylate units and (B) a polymer of ethylene and vinyl acetate, wherein the ratio of (A) to (B) is about 1:0.01 to about 1:1.
Claim 3
Dependent Claim
31 words
The composition of claim 1 wherein a cross-section of said composition, when photographed at a magnification of 10,000 X using an electron microscope, exhibits a morphology substantially as in FIG. 1.
Claim 4
Dependent Claim
17 words
The composition of claim 1 wherein the ratio of (A) to (B) is about 9:1 to 7:3.
Claim 5
Dependent Claim
17 words
The composition of claim 1 wherein said polymer (A) is of at least 90% methyl methacrylate units.
Claim 6
Dependent Claim
89 words
A process comprising: A. dissolving a copolymer of ethylene and vinyl acetate in a monomer system comprising at least 50 weight percent methyl methacrylate wherein the ratio of said monomer system to copolymer is about 1:0.01 to about 1:1; B. adding to the solution produced in step A a free radical catalyst and reducing the temperature of the solution to below 55° C.; C. maintaining the temperature of the solution below 50° C. while polymerizing the major portion of said monomer system to form a cocontinuous interpenetrating polymer morphology.
Claim 7
Dependent Claim
89 words
A process comprising: A. dissolving a copolymer of ethylene and vinyl acetate in a monomer system comprising at least 50 weight percent methyl methacrylate wherein the ratio of said monomer system to copolymer is about 1:0.01 to about 1:1; B. adding to the solution produced in step A a free radical catalyst and reducing the temperature of the solution to below 55° C.; C. maintaining the temperature of the solution below 50° C. while polymerizing the major portion of said monomer system to form a cocontinuous interpenetrating polymer morphology.
Claim 8
Dependent Claim
35 words
The process of claim 5 wherein after Step C, D. the polymerization is completed by increasing the temperature to at least 90° C. to reduce the residual monomer content to less than 2 weight percent.
Claim 9
Dependent Claim
14 words
The process of claim 5 wherein the temperature of polymerization is below 45° C.
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) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |