US4696978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified acrylic polymers
Assignee: Lyondell Chemical Technology LP
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Filing: 1986-02-03
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Granted: 1987-09-29
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Expires: 2006-02-03
Abstract
Abstract An extrudable acrylic composition which incorporates an interpolymer produced by the polymerization of methyl methacrylate monomer, an N-substituted maleimide monomer, an alkyl acrylate monomer, and a difunctional reactive monomer is disclosed.
Inventors
- 👤 Barry D. Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:41
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08L33/10; C08L33/12; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
82 words
A moldable thermoplastic composition which is transparent upon molding comprising an alkyl methacrylate homo-or copolymer matrix resin and of an interpolymer consisting essentially of a methylmethacrylate/N-substituted maleimide copolymer and an alkyl acrylate homopolymer linked through a difunctional reactive monomer prepared in a one-step reaction by reacting together methylmethacrylate monomer, an alkyl acrylate monomer, and a difunctional reactive monomer bearing acrylate or methacrylate reactive groups, the interpolymer being present in an amount sufficient to improve the impact strength of molded alkyl methacrylate resin.
Claim 2
Dependent Claim
82 words
A moldable thermoplastic composition which is transparent upon molding comprising an alkyl methacrylate homo-or copolymer matrix resin and of an interpolymer consisting essentially of a methylmethacrylate/N-substituted maleimide copolymer and an alkyl acrylate homopolymer linked through a difunctional reactive monomer prepared in a one-step reaction by reacting together methylmethacrylate monomer, an alkyl acrylate monomer, and a difunctional reactive monomer bearing acrylate or methacrylate reactive groups, the interpolymer being present in an amount sufficient to improve the impact strength of molded alkyl methacrylate resin.
Claim 3
Dependent Claim
29 words
The composition of claim 1 comprising in weight percent from about 60 to about 95 of said matrix resin and from about 5 to about 40 of said interpolymer.
Claim 4
Dependent Claim
56 words
The composition of claim 1 in which said interpolymer comprises in weight percent from about 15 to about 60 methyl methacrylate, from about 5 to about 20 N-substituted maleimide, from about 20 to about 80 alkyl acrylate, and from about 0.0001 to about 1 part per 100 parts of total monomer of said difunctional reactive monomer.
Claim 5
Dependent Claim
20 words
The composition of claim 1 in which said N-substituted maleimide is selected from the group consisting of N-alkylmaleimides and N-arylmaleimides.
Claim 6
Dependent Claim
36 words
The composition of claim 1 in which said methyl methacrylate/N-substituted maleimide copolymer has a number average molecular weight (Mw) as measured by gel permeation chromatography relative to polystyrene standards of from about 150,000 to about 450,000.
Claim 7
Dependent Claim
35 words
The composition of claim 1 in which said alkyl acrylate homopolymer has a number average molecular weight (Mw) as measured by gel permeation chromatography relative to polystyrene standards of from about 150,000 to about 450,000.
Claim 8
Dependent Claim
28 words
The composition of claim 1 in which said methyl methacrylate/N-substituted maleimide copolymer has a glass transition temperature as measured by differential scanning calorimetry of greater than 120° C.
Claim 9
Dependent Claim
27 words
The composition of claim 1 in which said alkyl acrylate homopolymer has a glass transition temperature as measured by differential scanning calorimetry of less than 0° C.
Claim 10
Dependent Claim
27 words
The composition of claim 1 in which said methyl methacrylate/N-substituted maleimide copolymer and said alkyl methacrylate homo- or copolymer matrix resin are thermodynamically miscible with one another.
Claim 11
Dependent Claim
22 words
The composition of claim 1 in which said alkyl acrylate homopolymer and said alkyl methacrylate homo- or copolymer matrix resin are immiscible.
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) | 1990-09-28 | 1991-03-30 | 1991-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-28 | 1995-03-30 | 1995-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-28 | 1999-03-30 | 1999-09-29 | $7700.00 | Window Closed / Lapsed |