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US4395508A
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Polycondensates of substituted piperidines and use thereof as stabilizers for polymers
Assignee: Montedison SpA
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Filing: 1981-07-29
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Granted: 1983-07-26
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Expires: 2001-07-29
Abstract
Abstract New polycondensates of alkyl-substituted piperidines are disclosed. These new polycondensates are useful for stabilizing thermoplastic polymers, in particular polyolefins, against sunlight, heat and oxidation. A process for producing the new polycondensates is also disclosed, as well as the polymeric compositions stabilized with said new polycondensates.
Inventors
- 👤 Giuseppe Nelli
- 👤 Roberto Oriani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:23
CPC Classifications
C; C08; C08L; C08L77/00; C08G; C08G69/00; C08G69/02; C08G69/26; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435; C08L101/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
119 words
Polyamides having the general formula (II): ##STR9## wherein: each of R 1 , R 2 , R 3 and R 4 , which may be the same or different, is an alkyl radical having 1 to 4 carbon atoms; R 5 is hydrogen or an alkyl radical having 1 to 4 carbon atoms; R 6 is hydrogen, an alkyl radical having 1 to 20 carbon atoms, a cycloalkyl radical having 3 to 10 carbon atoms, an aryl radical or an alkyl-aryl radical having from 6 to 20 carbon atoms; A is an alkylene radical having 3 to 10 carbon atoms or a cyclo-alkylene radical having 3 to 10 carbon atoms, and n is an integer from 2 to 100.
Claim 2
Dependent Claim
119 words
Polyamides having the general formula (II): ##STR9## wherein: each of R 1 , R 2 , R 3 and R 4 , which may be the same or different, is an alkyl radical having 1 to 4 carbon atoms; R 5 is hydrogen or an alkyl radical having 1 to 4 carbon atoms; R 6 is hydrogen, an alkyl radical having 1 to 20 carbon atoms, a cycloalkyl radical having 3 to 10 carbon atoms, an aryl radical or an alkyl-aryl radical having from 6 to 20 carbon atoms; A is an alkylene radical having 3 to 10 carbon atoms or a cyclo-alkylene radical having 3 to 10 carbon atoms, and n is an integer from 2 to 100.
Claim 3
Dependent Claim
55 words
Polyamides according to claim 1, in which in the general formula (II), each of R 1 , R 2 , R 3 and R 4 is methyl, R 5 is hydrogen, R 6 is hydrogen, A is an alkylene radical having 3 to 6 carbon atoms and n is an integer from 2 to 20.
Claim 4
Dependent Claim
42 words
A composition comprising thermoplastic synthetic polymers, stabilized to oxidation, to heat and to sun light, said composition containing incorporated therein, in an amount sufficient to prevent any degradation of the polymer, a polyamide according to claim 1 and having general formula (II).
Claim 5
Dependent Claim
56 words
A composition according to claim 3, in which, in general formula (II), each of R 1 , R 2 , R 3 and R 4 is methyl, each of R 5 and R 6 is hydrogen, A is an alkylene radical containing 3 to 6 carbon atoms and n is an integer from 2 to 20.
Claim 6
Dependent Claim
31 words
A composition according to claim 3 in which the polyamide having general formula (II) is present in an amount ranging from 0.01 to 5% by weight referred to the polymer weight.
Claim 7
Dependent Claim
15 words
A composition according to claim 3, in which the thermoplastic synthetic polymer is a polyolefin.
Claim 8
Dependent Claim
17 words
A composition according to claim 6, in which the polyolefin is polypropylene consisting prevailingly of isotactic macromolecules.
Claim 9
Dependent Claim
32 words
A composition according to claim 6, in which the polyamide having general formula (II) is present in an amount ranging from 0.01 to 2% by weight on the weight of the polyolefin.
Claim 10
Dependent Claim
18 words
A composition according to claim 3, in which the thermoplastic synthetic polymer is polyvinyl chloride or polyvinylidene chloride.
Claim 11
Dependent Claim
31 words
A composition according to claim 9, in which the polyamide having general formula (II) is present in an amount ranging from 0.01 to 1% by weight referred to the polymer weight.
Claim 12
Dependent Claim
18 words
A composition according to claim 3, in which the thermoplastic synthetic polymer is a polyurethane or a polyamide.
Claim 13
Dependent Claim
31 words
A composition according to claim 11, in which the polyamide having general formula (II) is present in an amount ranging from 0.01 to 5% by weight referred to the polymer weight.
Claim 14
Dependent Claim
23 words
A composition according to claim 3, in which the polyamide having general formula (II) is present in admixture with other known polymer additives.
Claim 15
Dependent Claim
31 words
A composition according to claim 13, in which the polymer additives are selected from the group consisting of antioxidants, ultraviolet ray absorbers, pigments, fillers, basic nitrogen-containing polycondensates and other known stabilizers.
Claim 16
Dependent Claim
29 words
A composition according to claim 13, in which the ratio by weight of the other polymer additives to the polyamide having general formula (II) is from 0.5:1 to 3:1.
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) | 1986-07-25 | 1987-01-24 | 1987-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-25 | 1991-01-24 | 1991-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-25 | 1995-01-24 | 1995-07-26 | $7700.00 | Window Closed / Lapsed |