Patent US2167369A successfully refreshed from Google Patents.
US4598124A
Expired / Lapsed
US
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Mass polymerization process for ABS polyblends
Assignee: Bayer Antwerpen NV
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Filing: 1983-08-29
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Granted: 1986-07-01
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Expires: 2003-08-29
Abstract
Abstract An ABS polymer comprising (A) a graft copolymer formed by graft polymerizing styrene and acrylonitrile monomers onto an initially ungrafted, low gel diene rubber and (B) a copolymer of said grafted monomers in which said graft copolymer is dispersed; said diene rubber comprising 3 to 25% by weight of such polymer with the polymerized acrylonitrile content thereof being 27 to 40% by weight.
Inventors
- 👤 Vincent A. Aliberti
- 👤 Robert L. Kruse
- 👤 Eduardo M. Valcarce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:49
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F279/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
80 words
An ABS polymer comprising: (A) a graft copolymer formed by graft polymerizing styrene and acrylonitrile monomers onto an intially ungrafted, low gel diene rubber; and (B) a copolymer of said grafted monomers in which said grafted copolymer is dispersed; said diene rubber comprising 3 to 25% by weight of said polymer; the polymerized acrylonitrile content of said polymer being 27 to 40% by weight; said A and B simultaneously formed by continuous mass polymerization from a substantially uniform reaction composition.
Claim 2
Dependent Claim
80 words
An ABS polymer comprising: (A) a graft copolymer formed by graft polymerizing styrene and acrylonitrile monomers onto an intially ungrafted, low gel diene rubber; and (B) a copolymer of said grafted monomers in which said grafted copolymer is dispersed; said diene rubber comprising 3 to 25% by weight of said polymer; the polymerized acrylonitrile content of said polymer being 27 to 40% by weight; said A and B simultaneously formed by continuous mass polymerization from a substantially uniform reaction composition.
Claim 3
Dependent Claim
22 words
The polymer of claim 1 wherein the particle size of said diene rubber in said polymer is from 0.1 to 10 microns.
Claim 4
Dependent Claim
22 words
The polymer of claim 1 wherein the particle size of said diene rubber is from about 0.8 microns to about 10 microns.
Claim 5
Dependent Claim
23 words
The polymer of claim 1,2 or 3 wherein said diene rubber comprises from about 14 to about 25% by weight of said polymer.
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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) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |