US4075163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzene phosphonous acid compounds, their production and use as stabilizers for organic materials
Assignee: Sandoz AG
•
Filing: 1976-03-19
•
Granted: 1978-02-21
•
Expires: 1996-03-19
Abstract
Abstract The purpose of the invention are new benzene phosphonous acid compounds in which two to four benzene nuclei are bound together and which contain one to three phosphorus atoms. The new compounds are free acids, their salts with inorganic cations, their esters, thioesters or amides. The invention concerns also the manufacture of these benzene phosphonous acid compounds and their use for the stabilization of organic materials.
Inventors
- 👤 Kurt Hofer
- 👤 Guenther Tscheulin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5393; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/48; C07F9/4808; C07F9/4841; C07F9/50; C07F9/52; C08K5/5398; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C09K15/322; C09K15/324
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
124 words
A composition stabilized against the effect of light, oxygen and/or heat which comprises an organic polymeric material which is sensitive to said effect and an effective amount of a stabilizing agent of the formula wherein each of R 1 , r 2 , r 3 and R 4 , independently, is a hydrocarbon radical of up to 16 carbon atoms, selected from the group consisting of alkyl which is unsubstituted or substituted by methoxy, phenoxy, cresoxy or chloro, cycloalkyl, aryl which is unsubstituted or substituted by methoxy or chloro, alkylaryl and benzyl which is unsubstituted or substituted by chloro, Y is oxygen or sulphur n is 1 or 2 and the polyphenylene moiety is unsubstituted or substituted by alkyl, cycloalkyl, chlorine, bromine or alkoxy.
Claim 2
Dependent Claim
124 words
A composition stabilized against the effect of light, oxygen and/or heat which comprises an organic polymeric material which is sensitive to said effect and an effective amount of a stabilizing agent of the formula wherein each of R 1 , r 2 , r 3 and R 4 , independently, is a hydrocarbon radical of up to 16 carbon atoms, selected from the group consisting of alkyl which is unsubstituted or substituted by methoxy, phenoxy, cresoxy or chloro, cycloalkyl, aryl which is unsubstituted or substituted by methoxy or chloro, alkylaryl and benzyl which is unsubstituted or substituted by chloro, Y is oxygen or sulphur n is 1 or 2 and the polyphenylene moiety is unsubstituted or substituted by alkyl, cycloalkyl, chlorine, bromine or alkoxy.
Claim 3
Dependent Claim
10 words
A composition according to claim 1, wherein n is 1.
Claim 4
Dependent Claim
10 words
A composition according to claim 1, wherein Y is oxygen.
Claim 5
Dependent Claim
30 words
A composition according to claim 1, wherein each of R 1 , R 2 , R 3 and R 4 , if aryl, is phenyl and, if alkylaryl, is alkylphenyl.
Claim 6
Dependent Claim
15 words
A composition according to claim 3, wherein the stabilizing agent is of the formula ##STR32##
Claim 7
Dependent Claim
15 words
A composition according to claim 2, wherein the stabilizing agent is of the formula ##STR33##
Claim 8
Dependent Claim
15 words
A composition according to claim 3, wherein the stabilizing agent is of the formula ##STR34##
Claim 9
Dependent Claim
15 words
A composition according to claim 3, wherein the stabilizing agent is of the formula ##STR35##
Claim 10
Dependent Claim
14 words
A composition according to claim 1, wherein the susceptible material comprises a plastics material.
Claim 11
Dependent Claim
46 words
A composition according to claim 9, wherein the plastics material is selected from cellulose acetate, cellulose proprionate, cellulose acetobutyrate, polyethylene, polypropylene, polyvinyl chloride, polyvinyl chloride-acetate, polyamides, polystyrene, ethyl cellulose, cellulose nitrate, polyvinyl alcohol, silicon rubber, melamine-formaldehyde and urea-formaldehyde resins, allyl cast resins, polymethylmethacrylate, polyesters and polyacrylonitrile.
Claim 12
Dependent Claim
24 words
A composition according to claim 1, which contains between 0.01 and 5% of the stabilizing agent, based on the weight of the susceptible material.
Claim 13
Dependent Claim
24 words
A composition according to claim 1 wherein R 1 , R 2 , R 3 and R 4 and the polyphenylene moiety are unsubstituted.
Claim 14
Dependent Claim
12 words
A composition according to claim 10 wherein the plastics material is polypropylene.
References Cited (Backward Citations)
US2510777A
Cited
US2553643A
Cited
US2606169A
Cited
US3061583A
Cited
US3236803A
Cited
US3050499A
Cited
US3496128A
Cited
US3231531A
Cited
US3493538A
Cited
US3676393A
Cited
US3978020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |