US3666715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized composition comprising{60 -olefin polymers and melamine
Assignee: Himont Inc
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Filing: 1970-07-08
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Granted: 1972-05-30
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Expires: 1990-07-08
Abstract
Abstract The resistance of Alpha -olefin polymers to copper induced oxidation is improved by adding thereto 0.01 to 2 percent melamine along with conventional antioxidants and light stabilizers. The efficiency of the melamine as a stabilizer is improved if the particle size is below about 55 Mu .
Inventors
- 👤 Abraham Kutner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:45
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08K; C08K5/00; C08K5/04; C08K5/10; C08L23/10; C08L61/00; C08L61/04; C08L61/06; C08L61/20; C08L61/26; C08L61/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
A composition which exhibits good resistance to oxidative degradation in the presence of copper which comprises a polymer of an olefin having two to six carbon atoms containing, based on the weight of said polymer, about 0.01 to 2 percent of melamine, about 0.01 to 2 percent of phenolic antioxidant having more than one phenolic residue and having sterically blocking group on at least one carbon atom adjacent to each phenolic hydroxyl group, and about 0 to 2 percent of an organic sulfur compound having a molecular weight of at least about 250 selected from the class consisting of (1) mercaptans, and disulfides, and (2) diesters of thiodialkanoic acids.
Claim 2
Dependent Claim
114 words
A composition which exhibits good resistance to oxidative degradation in the presence of copper which comprises a polymer of an olefin having two to six carbon atoms containing, based on the weight of said polymer, about 0.01 to 2 percent of melamine, about 0.01 to 2 percent of a phenolic antioxidant having more than one phenolic residue and having a sterically blocking group on at least one carbon atom adjacent to each phenolic hydroxyl group, and about 0 to 2 percent of an organic sulfur compound selected from the class consisting of (1) distearyl thiodipropionate, (2) dilauryl thiodipropionate, (3) dilauryl thiodibutyrate, (4) distearyl sulfide, (5) stearyl mercaptan, (6) distearyl disulfide, and (7) dihexadecyl sulfide.
Claim 3
Dependent Claim
72 words
The composition of claim 3 wherein the phenolic antioxidant is selected from the class consisting of (1) the condensation product of about 1 mole of crotonaldehyde and about 3 moles of 3-methyl-6-t-butyl phenol, (2) the condensation product of about 1 mole of butyraldehyde and 2 moles of 3-methyl-6-t-butylphenol, (3) pentaerythritol tetra- Beta (4-hydroxy-3,5-di-t-butylphenyl)propionate, (4) the condensation product of about 1 mole of SC12 with about 2 moles of 3-methyl-6-t-butylphenol, and (5) 2,4,6-tris(4-hydroxy-3,5-di-t-butylbenzyl)mesitylene.
Claim 4
Dependent Claim
29 words
The composition of claim 3 where the olefin polymer is selected from the class consisting of polypropylene and crystalline copolymers of propylene with up to about 25 percent ethylene.
Claim 5
Dependent Claim
29 words
The composition of claim 3 where the olefin polymer is selected from the class consisting of polyethylene and copolymers of ethylene with minor portions of a second Alpha -olefin.
References Cited (Backward Citations)
US3181971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |