US3668281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene compositions
Assignee: Phillips Petroleum Co
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Filing: 1970-02-25
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Granted: 1972-06-06
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Expires: 1990-02-25
Abstract
Abstract High impact strength polypropylene compositions are prepared by blending polypropylene, a halogenated polyolefin, and a rubbery ethylene-propylene copolymer. These compositions can be made fire-resistant by blending therein a halogenated bis(cycloalkenyl) compound, optionally further with antimony oxide, without loss of desired physical properties.
Inventors
- 👤 William O Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:15
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02; C08L; C08L23/00; C08L23/02; C08L23/10; C08L2201/00; C08L2201/02; C08L2205/00; C08L2205/03; C08L23/04; C08L23/06; C08L23/16; C08L23/26; C08L23/28; C08L27/00; C08L27/02; C08L27/04; C08L27/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
27 words
A composition according to claim 1 wherein said ethylene-propylene rubbery copolymer contains at least about 50 weight percent of the copolymer contributed by the propylene comonomer units.
Claim 2
Dependent Claim
34 words
A composition according to claim 1 wherein said (b) halogenated polymonoolefin is prepared by halogenating a polymonoolefin with a density of from 0.91 to 0.96 and a melt index of from 0.2 to 25.
Claim 3
Dependent Claim
64 words
A composition according to claim 3 wherein said (a) polypropylene has a density of from 0.89 to 0.92 and a flexural modulus of from 100,000 to 300,000, and wherein said (c) is a rubbery copolymer of ethylene with propylene wherein said ethylene constitutes from 80 to 20 weight percent of said rubbery copolymer and said propylene substantially constitutes the remainder of said rubbery copolymer.
Claim 4
Dependent Claim
102 words
A composition according to claim 4 further containing an effective minor amount of at least one halogen-containing flame retardant, wherein said halogen-containing flame retardant is a bis(cycloalkenyl) wherein each A is cycloalkyl having from five to eight carbon atoms in the ring; R is a saturated divalent acyclic hydrocarbyl radical having from one to four carbon atoms; X is selected from chlorine and bromine and is substituted on carbon atoms of A and R; m, n, and o are integers selected such that m n + o represents a total halogen content of from 30 to 90 weight percent of said bis(cycloalkenyl).
Claim 5
Dependent Claim
44 words
A composition according to claim 5 further including from 1 to 20 weight percent of said bis(cycloalkenyl), and from 0 to 20 weight percent of antimony oxide, bismuth oxide, or arsenic oxide, based on the total weight of said (a) plus (b) plus (c).
Claim 6
Dependent Claim
47 words
A composition according to claim 6 wherein said (b) is a chlorinated polyethylene, said bis(cycloalkenyl) is a brominated bis(cycloalkenyl) and is present such that the total available halogen in the final composition is at least about 0.2 weight percent based on the weight of the final composition.
Claim 7
Dependent Claim
13 words
A composition according to claim 7 wherein said brominated bis(cycloalkenyl) is 1,2-bis(3,4-dibromocyclohexyl)-1,2-dibromo ethane.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |