Patent US3441098A successfully refreshed from Google Patents.
Patent US3920606A successfully refreshed from Google Patents.
US3920606A
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Nonflammable molding compositions of styrene polymers
Assignee: Huels AG
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Filing: 1974-04-08
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Granted: 1975-11-18
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Expires: 1994-04-08
Abstract
Abstract WHEREIN R is bromomethyl or dibromomethyl; R'' is alkyl of 1-3 carbon atoms, at least one R'' being ortho to each R; and n is an integer from 1 to 3, inclusive; m is the integer 2 or 3; the sum of m and n being from 3 to 5, inclusive. Improved nonflammable polystyrene molding compositions containing 1-20% of a brominated polyalkylbenzene of the formula
Inventors
- 👤 Klaus Diebel
- 👤 Helmut Birkner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:08
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0019; C08K; C08K5/00; C08K5/02; C08K5/03; C08J2325/00; C08J2325/02; C08J2325/04; Y; Y10; Y10S; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
34 words
IN A NOFLAMMABLE THERMOPLASTIC POLYSTRENE MOLDING COMPOSITION CONTAINING 1-20%, BASED ON THE STYRENE POLYMER, OF AT LEAST ONE BROMINATED POLYALKYL BENZENE, THE IMPROVEMENT WHEREIN THE BROMINATED POLYALKYL BENZENE IS A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
34 words
IN A NOFLAMMABLE THERMOPLASTIC POLYSTRENE MOLDING COMPOSITION CONTAINING 1-20%, BASED ON THE STYRENE POLYMER, OF AT LEAST ONE BROMINATED POLYALKYL BENZENE, THE IMPROVEMENT WHEREIN THE BROMINATED POLYALKYL BENZENE IS A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
19 words
A composition according to claim 1, containing 4-10% by weight, based on the styrene polymer of the brominated polyalkylbenzene.
Claim 4
Dependent Claim
22 words
A molding composition according to claim 1, wherein the brominated polyalkyl benzene compound has a decomposition point of at least 200* C.
Claim 5
Dependent Claim
10 words
A composition according to claim 1, wherein R is CH2Br.
Claim 6
Dependent Claim
9 words
A composition of claim 1, wherein R'' is CH3.
Claim 7
Dependent Claim
16 words
A composition according to claim 1, wherein R is CH2Br and n is 2 or 3.
Claim 8
Dependent Claim
14 words
A composition according to claim 1, wherein R is CH2Br and R'' is CH3.
Claim 9
Dependent Claim
16 words
A composition according to claim 1, wherein R'' is CH3 and n is 2 or 3.
Claim 10
Dependent Claim
29 words
A composition according to claim 2, wherein the brominated polyalkyl benzene compound has a decomposition point of at least 200* C., wherein R is CH2Br and R'' is CH3.
Claim 11
Dependent Claim
12 words
A composition according to claim 9, wherein n is 2 or 3.
Claim 12
Dependent Claim
12 words
A composition according to claim 10, wherein the brominated polyalkylbenzene is 1,4-bis(bromomethyl)-2,5-dimethylbenzene.
Claim 13
Dependent Claim
12 words
A composition according to claim 10, wherein the brominated polyalkylbenzene is 1,3-bis-(bromomethyl)-2,4,6-trimethylbenzene.
Claim 14
Dependent Claim
12 words
A composition according to claim 10, wherein the brominated polyalkylbenzene is 1,3-bis-(bromomethyl)-4,6-dimethylbenzene.
Claim 15
Dependent Claim
10 words
A composition according to claim 1, wherein R is dibromomethyl.
References Cited (Backward Citations)
US3635850A
Cited
US3817912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |