US3979347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant containing poly(vinyl chloride) molding composition
Assignee: Hoechst AG
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Filing: 1974-09-03
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Granted: 1976-09-07
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Expires: 1994-09-03
Abstract
Abstract As lubricants for processing poly(vinyl chloride), there are used polyolefin oxidates having a content of from 20 to 80 weight % of dicarboxylic acids, an acid number of from 30 to 150 and a saponification number of from 40 to 220. Partial esters and salts of the indicated polyolefin oxidates are also appropriate. Shaped articles made from a PVC containing these lubricants have a very high degree of transparence.
Inventors
- 👤 Walter Brotz
- 👤 Fred Mader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:19
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L23/00; C08L23/26; C08L23/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
142 words
A molding composition consisting of 100 parts by weight poly(vinyl chloride) and from 0.05 to 2.0 parts by weight as a lubricant of an oxidation product of polyethylene or a copolymer of ethylene and an α-olefin having from 3 to 8 carbon atoms, which polyethylene or ethylene and α-olefin copolymer have a molecular weight of 10,000 to 1,000,000, said oxidation product being prepared by treatment of a dispersion of said homopolymer or copolymer with oxygen or an oxygen-containing gas in the melt in the presence of a liquid dispersing agent inert to oxygen while constantly and thoroughly mixing the liquids under a pressure of from zero to 100 atomspheres gauge; said oxidation product having an acid number of from 30 to 150, a saponification number of from 40 to 220 and a dicarboxylic acid content of from 20 to 80 weight %.
Claim 2
Dependent Claim
142 words
A molding composition consisting of 100 parts by weight poly(vinyl chloride) and from 0.05 to 2.0 parts by weight as a lubricant of an oxidation product of polyethylene or a copolymer of ethylene and an α-olefin having from 3 to 8 carbon atoms, which polyethylene or ethylene and α-olefin copolymer have a molecular weight of 10,000 to 1,000,000, said oxidation product being prepared by treatment of a dispersion of said homopolymer or copolymer with oxygen or an oxygen-containing gas in the melt in the presence of a liquid dispersing agent inert to oxygen while constantly and thoroughly mixing the liquids under a pressure of from zero to 100 atomspheres gauge; said oxidation product having an acid number of from 30 to 150, a saponification number of from 40 to 220 and a dicarboxylic acid content of from 20 to 80 weight %.
Claim 3
Dependent Claim
25 words
The molding composition as claimed in claim 1, wherein the oxidation product is in a partially esterified form or in the form of a salt.
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) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |