US4341890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(brominated phenylene oxide) and flame-retarded high impact polystyrene composition
Assignee: Great Lakes Chemical Corp
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Filing: 1980-11-10
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Granted: 1982-07-27
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Expires: 2000-11-10
Abstract
Abstract A flame-retarded polystyrene composition which does not bloom comprising at least about 50 percent (by combined weight of polystyrene, poly[brominated phenylene oxide], and enhancing agent) of high impact polystyrene, from about 9 to about 22 percent (by weight) of poly(brominated phenylene oxide), and from 1 to about 10 percent (by weight) of enhancing agent is disclosed.
Inventors
- 👤 Michael W. Lindvay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:57
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/04; C07; C07C; C07C43/00; C07C43/02; C07C43/257; C07C43/275; C08G; C08G65/00; C08G65/34; C08G65/38; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/126; C08L2201/00; C08L2201/02; C08L71/123
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
174 words
A branched polymer having a hydroxyl number of from 2.8 to about 30 of the structural formula ##STR8## wherein each repeating unit set out within the brackets of the structural formula is attached in an ortho or para configuration to its adjacent phenyl and phenoxy moiety; and wherein E is an end group of the formula ##STR9## Y is a side chain of the same structure and configuration as said repeating unit; the substituents Br, E and Y on each phenyl ring are attached only to the ortho or para positions relative the hydroxyl group in the structural formula and the oxygen atom in the repeating unit; each t, p and q are independently the integer 0 or 1, provided that the sum of t plus p plus q equals 2, and provided that from about 10 to about 80 percent of the repeating units have the side chain and end unit --Y--E attached thereto; and m is an integer such that the total molecular weight of the polymer ranges from 2000 to 20,000.
Claim 2
Dependent Claim
174 words
A branched polymer having a hydroxyl number of from 2.8 to about 30 of the structural formula ##STR8## wherein each repeating unit set out within the brackets of the structural formula is attached in an ortho or para configuration to its adjacent phenyl and phenoxy moiety; and wherein E is an end group of the formula ##STR9## Y is a side chain of the same structure and configuration as said repeating unit; the substituents Br, E and Y on each phenyl ring are attached only to the ortho or para positions relative the hydroxyl group in the structural formula and the oxygen atom in the repeating unit; each t, p and q are independently the integer 0 or 1, provided that the sum of t plus p plus q equals 2, and provided that from about 10 to about 80 percent of the repeating units have the side chain and end unit --Y--E attached thereto; and m is an integer such that the total molecular weight of the polymer ranges from 2000 to 20,000.
Claim 3
Dependent Claim
16 words
The branched polymer of claim 1 wherein its molecular weight ranges from 2000 to about 12,000.
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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) | 1985-07-26 | 1986-01-25 | 1986-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-26 | 1990-01-25 | 1990-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-26 | 1994-01-25 | 1994-07-27 | $7700.00 | Window Closed / Lapsed |