US4002703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft copolymers based on methyl methacrylate polymers
Assignee: BASF SE
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Filing: 1975-08-12
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Granted: 1977-01-11
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Expires: 1995-08-12
Abstract
Abstract This invention relates to a process for the manufacture of graft copolymers based on methyl methacrylate polymers. The methyl methacrylate polymer is reacted with a high molecular weight organic compound containing at least one alkylene oxide unit having an alkali metal alcoholate end group, during which reaction transesterification occurs to eliminate alkali metal methoxide and cause chain joining. The graft copolymers may be used for the production of shaped articles or coating compositions and as additives, antistatic agents or adhesion promoters for plastics materials.
Inventors
- 👤 Gerhard Fahrbach
- 👤 Erhard Seiler
- 👤 Dieter Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:31
CPC Classifications
C; C08; C08G; C08G81/00; C08G81/02; C08G81/024; C08G81/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A process for the manufacture of grafting living polyalkylene oxide on methyl methacrylate polymers, wherein a polymer of methyl methacrylate (A) containing at least 10% by weight of polymerized units of methyl methacrylate is reacted with a high molecular weight organic compound (B) consisting essentially of polyalkylene oxide with at least one alkylene oxide unit having an alkali metal alcoholate end group, said reaction being carried out in an anhydrous inert organic solvent by mixing solutions of components A and B at from -50° to +100° C.
Claim 2
Dependent Claim
87 words
A process for the manufacture of grafting living polyalkylene oxide on methyl methacrylate polymers, wherein a polymer of methyl methacrylate (A) containing at least 10% by weight of polymerized units of methyl methacrylate is reacted with a high molecular weight organic compound (B) consisting essentially of polyalkylene oxide with at least one alkylene oxide unit having an alkali metal alcoholate end group, said reaction being carried out in an anhydrous inert organic solvent by mixing solutions of components A and B at from -50° to +100° C.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |