US4375532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiphase core/shell polymers
Assignee: Monsanto Co
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Filing: 1981-08-30
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Granted: 1983-03-01
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Expires: 2001-08-30
Abstract
Abstract A multiphase core//shell polymer comprising a crosslinked elastomer core and a rigid thermoplastic polymer shell comprising a mono alkyl maleate or fumarate, styrene and optionally a monomer selected from the group consisting of C1 to C8 alkyl acrylates and methacrylates, acrylonitrile and methacrylonitrile. The core has an average particle diameter in the range of about 0.3 to about 0.8 micron and the rigid shell has a thickness of at least about 0.025 micron. The multiphase core//shell polymers are useful for blending with polyamides to provided toughened polyamide compositions.
Inventors
- 👤 Massimo Baer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:14
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08F; C08F291/00; C08F291/02; C08J3/126; C08L; C08L77/00; C08J2355/00; C08J2355/02; C08J2425/00; C08J2425/02; C08J2425/04; C08J2425/06; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
A multiphase core//shell polymer comprising about 50 to about 90 parts by weight of a crosslinked elastomer core and about 10 to about 50 parts by weight of a rigid thermoplastic polymer shell comprising from about 1 to about 25 parts by weight of an interpolymerized C 1 to C 4 monoalkyl maleate or fumarate, from about 20 to about 80 parts by weight of interpolymerized styrene, from about 0 to about 79 parts by weight of an interpolymerized C 1 to C 8 alkyl acrylate or methacrylate and from about 0 to about 45 parts by weight of interpolymerized acrylonitrile or methacrylonitrile based on 100 parts by weight of shell interpolymer, wherein the core of the multiphase core//shell polymer has a weight average particle diameter in the range of about 0.3 to about 0.8 micron and the rigid shell has a thickness of at least about 0.025 micron and wherein the glass transition temperature of the rigid thermoplastic polymer shell is at least about 35° C.
Claim 2
Dependent Claim
167 words
A multiphase core//shell polymer comprising about 50 to about 90 parts by weight of a crosslinked elastomer core and about 10 to about 50 parts by weight of a rigid thermoplastic polymer shell comprising from about 1 to about 25 parts by weight of an interpolymerized C 1 to C 4 monoalkyl maleate or fumarate, from about 20 to about 80 parts by weight of interpolymerized styrene, from about 0 to about 79 parts by weight of an interpolymerized C 1 to C 8 alkyl acrylate or methacrylate and from about 0 to about 45 parts by weight of interpolymerized acrylonitrile or methacrylonitrile based on 100 parts by weight of shell interpolymer, wherein the core of the multiphase core//shell polymer has a weight average particle diameter in the range of about 0.3 to about 0.8 micron and the rigid shell has a thickness of at least about 0.025 micron and wherein the glass transition temperature of the rigid thermoplastic polymer shell is at least about 35° C.
Claim 3
Dependent Claim
34 words
The multiphase core//shell polymer according to claim 1 comprising from about 60 to about 80 parts by weight of elastomer core and from about 20 to about 40 parts by weight of rigid shell.
Claim 4
Dependent Claim
31 words
The multiphase core//shell polymer according to claim 1 wherein the core of the multiphase polymer has a weight average particle diameter in the range of about 0.4 to about 0.7 micron.
Claim 5
Dependent Claim
18 words
The multiphase core//shell polymer according to claim 1, 2 or 3 wherein the elastomer core comprises interpolymerized butadiene.
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) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |