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US4092460A
Expired / Lapsed
US
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Compositions intended for the flameproofing of plastics
Assignee: Rhone Poulenc Industries SA
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Filing: 1976-05-28
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Granted: 1978-05-30
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Expires: 1996-05-28
Abstract
Abstract Compositions for flameproofing plastics without the release of toxic products during use in which compositions consist of a pulverulent mixture containing from 50 to 95% by weight of red phosphorous and from 5 to 50% by weight of polymers having unsaturated malenoid, fumaroid or allyl bonds.
Inventors
- 👤 Jacqueline Cerny
- 👤 Gilbert Vivant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:14
CPC Classifications
C; C08; C08L; C08L79/00; C08L79/04; C08L79/08; C08L79/085; C08K; C08K3/00; C08K3/02; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/16; C08K5/34; C08L101/00; C08L2201/00; C08L2201/02; C08L35/00; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
89 words
Compositions intended for flameproofing plastics, which compositions do not evolve toxic products when use is made of the plastics, characterized in that said compositions consist of a pulverulent mixture comprising: (a) 50 to 95% by weight of red phosphorous in particulate form, having a mean particle size of less than 200 μ, and (b) 5 to 50% by weight of at least one polymer or prepolymer which contains malenoid, fumaroid or allyl unsaturated bonds and in which the particles of red phosphorous are coated with the polymer or prepolymer.
Claim 2
Dependent Claim
89 words
Compositions intended for flameproofing plastics, which compositions do not evolve toxic products when use is made of the plastics, characterized in that said compositions consist of a pulverulent mixture comprising: (a) 50 to 95% by weight of red phosphorous in particulate form, having a mean particle size of less than 200 μ, and (b) 5 to 50% by weight of at least one polymer or prepolymer which contains malenoid, fumaroid or allyl unsaturated bonds and in which the particles of red phosphorous are coated with the polymer or prepolymer.
Claim 3
Dependent Claim
32 words
Compositions as claimed in claim 1 in which the polymer of prepolymer (b) are polymers or copolymers obtained from the group consisting of maleic anhydride, maleic acid esters, and fumaric acid esters.
Claim 4
Dependent Claim
18 words
Compositions as claimed in claim 1 in which the polymer or prepolymer (b) are polyimides containing N,N'-bis-maleimide groups.
Claim 5
Dependent Claim
16 words
Compositions as claimed in claim 3 in which the polymer or prepolymer (b) is a 4,4'-bis-maleimido-diphenylmethane.
Claim 6
Dependent Claim
41 words
Compositions as claimed in claim 1 which contain up to 100% by weight, relative to the red phosphorous, of a metal oxide selected from the group consisting of the oxides of copper, zinc, silver, iron, antimony, vanadium, tin, titanium or magnesium.
Claim 7
Dependent Claim
65 words
A flameproofed plastic comprising a plastic and 0.2 to 20% by weight relative to the plastic of a flame proofing agent which does not evolve toxic products when use is made of the plastic comprising 50 to 95% by weight of red phosphorous in particulate form and 5 to 50% by weight of a polymer or prepolymer which contains malenoid, fumaroid, or allyl unsaturated bonds.
Claim 8
Dependent Claim
65 words
A flameproofed plastic comprising a plastic and 0.2 to 20% by weight relative to the plastic of a flame proofing agent which does not evolve toxic products when use is made of the plastic comprising 50 to 95% by weight of red phosphorous in particulate form and 5 to 50% by weight of a polymer or prepolymer which contains malenoid, fumaroid, or allyl unsaturated bonds.
Claim 9
Dependent Claim
32 words
A flameproofed plastic as claimed in claim 6, in which the flame proofing agent is uniformly distributed throughout the plastic as fine particles having a mean diameter of less than 200 microns.
Claim 10
Dependent Claim
32 words
A flameproofed plastic as claimed in claim 6, in which the flame proofing agent is uniformly distributed throughout the plastic as fine particles having a mean diameter of less than 100 microns.
Claim 11
Dependent Claim
20 words
A flameproofed plastic as claimed in claim 6, in which the polymer or prepolymer is admixed with the red phosphorous.
Claim 12
Dependent Claim
25 words
A flameproofed plastic as claimed in claim 6, in which the polymer or prepolymer is present as a coating on the particles of red phosphorous.
Claim 13
Dependent Claim
48 words
A flameproofed plastic as claimed in claim 6, in which an oxide of a metal selected from the group consisting of copper, zinc, silver, iron, antimony, vanadium, tin, titanium and magnesium is present in the flame proofing agent in an amount up to the amount of red phosphorous.
Claim 14
Dependent Claim
37 words
A flameproofed plastic as claimed in claim 6, in which the flame proofing agent consists of 50 to 95 parts by weight of red phosphorous to 5 to 50 parts by weight of the polymer or prepolymer.
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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |