US3683050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing improved plastic compositions and the resulting products
Assignee: DSM Copolymer Inc
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Filing: 1969-04-24
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Granted: 1972-08-08
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Expires: 1989-04-24
Abstract
Abstract Plastics having improved impact resistance are prepared by interpolymerizing a mixture including a rubbery interpolymer of ethylene, at least one alpha monoolefin having 3-16 carbon atoms and an alkylidene norbornene, preferably 5-ethylidene-2norbornene and an alkenyl aromatic monomer such as styrene, a vinyl or vinylidene halide such as vinyl chloride, an acrylic monomer such as acrylonitrile, and mixtures thereof in an organic solvent for the rubbery polymer and in the presence of a free radical catalyst.
Inventors
- 👤 Curtis L Meredith
- 👤 Robert E Barrett
- 👤 William A Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:15
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; C08F255/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
22 words
The plastic composition of claim 1 wherein the resinous polymer is polystyrene, and the monomeric material grafted on the interpolymer is styrene.
Claim 2
Dependent Claim
58 words
The plastic composition of claim 2 wherein the ratio by weight of the grafted styrene monomer to the rubbery interpolymer in (B) is between about 1:4 and 4:1, and the plastic composition contains about 1-50 parts by weight of the rubbery interpolymer for each 99-50 parts by weight of the polystyrene and the grafted styrene monomer in (B).
Claim 3
Dependent Claim
58 words
The composition of claim 3 wherein about 30-120 parts by weight of the styrene monomer is grafted on each 100 parts by weight of the rubbery interpolymer in (B), and the composition contains about 4-25 parts by weight of the rubbery interpolymer for each 96-75 parts by weight of the polystyrene and the grafted styrene monomer in (B).
Claim 4
Dependent Claim
33 words
The plastic composition of claim 1 wherein the resinous polymer is an interpolymer of styrene and acrylonitrile, and the monomeric material grafted on the rubbery interpolymer is a mixture of styrene and acrylonitrile.
Claim 5
Dependent Claim
82 words
The plastic composition of claim 5 wherein the ratio by weight of the grafted styrene and acrylonitrile to the rubbery interpolymer in (B) is between about 1:4 and 4:1, the ratio by weight of styrene to acrylonitrile in the overall plastic composition is between about 2:1 and 4:1, and the plastic composition contains about 1-50 parts by weight of the rubbery interpolymer for each 99-50 parts by weight of the styrene-acrylonitrile interpolymer and the grafted styrene and the acrylonitrile monomer in (B).
Claim 6
Dependent Claim
78 words
The plastic composition of claim 6 wherein about 30-120 parts by weight of styrene and acrylonitrile monomer is grafted on each 100 parts by weight of the rubber interpolymer in (B), the ratio by weight of styrene to acrylonitrile in the overall plastic composition is about 3:1, and the composition contains about 4-25 parts by weight of the rubbery interpolymer for each 96-75 parts by weight of the styrene-acrylonitrile interpolymer and the grafted styrene and acrylonitrile in (B).
Claim 7
Dependent Claim
24 words
The plastic composition of claim 1 wherein the monomeriC material includes a monomer selected from the group consisting of vinyl chloride and vinylidene chloride.
Claim 8
Dependent Claim
95 words
The plastic composition of claim 1 wherein the elastomeric material is a blend containing 5-95 parts by weight of the said rubbery interpolymer and 95-5 parts by weight of a rubbery polymer selected from the group consisting of rubbery interpolymers of ethylene and at least one alpha monoolefin containing 3-16 carbon atoms, rubbery interpolymers of ethylene and at least one polyene, rubbery interpolymers of isobutene and at least one polyene, natural rubber, homopolymers of conjugated diolefins containing 4-10 carbon atoms, and interpolymers of said conjugated diolefins and at least one monoethylenically unsaturated monomer interpolymerizable therewith.
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |