US4220570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizer combination for vinyl chloride polymers containing partial esters of pentaerythritol with fatty acids
Assignee: Henkel AG and Co KGaA
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Filing: 1977-09-19
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Granted: 1980-09-02
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Expires: 1997-09-19
Abstract
Abstract A stabilizer composition for molding compositions based on polyvinyl chloride and/or mixed polymers containing predominantly vinyl chloride comprising (a) a partial ester of pentaerythritol with a fatty acid, (b) calcium and/or zinc stearate, and/or the corresponding palmitate, (c) a waxy hydrocarbon and/or a fatty acid, and (d) an antioxidant.
Inventors
- 👤 Frido Loffelholz
- 👤 Peter Wedl
- 👤 Kurt Worschech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:32
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/10; C08K5/101; C08K5/103; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L91/00; C08L91/06; C08L91/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
181 words
A stabilizer combination for molding compositions based on polyvinyl chloride, and/or mixed polymers containing predominantly vinyl chloride which consists essentially of (a) per 100 parts by weight of partial ester of pentaerythritol with a fatty acid of 12 to 22 carbon atoms, having an OH number between 140 and 580 and an acid number below 15, (b) 200 to 350 parts by weight of an alkaline earth metal soap selected from the group consisting of calcium stearate, zinc stearate, calcium palmitate, zinc palmitate and any mixture of said alkaline earth metal soaps, (c) 200 to 300 parts by weight of a lubricant selected from the group consisting of (1) a waxy hydrocarbon selected from the group consisting of paraffin having a solidification point between 50° C. and 110° C. and low molecular weight polyethylene having a softening point of below 140° C., (2) a fatty acid with 12 to 22 carbon atoms, and (3) a mixture of said waxy hydrocarbon and said fatty acid with 12 to 22 carbon atoms, and (d) 5 to 20 parts by weight of an antioxidant.
Claim 2
Dependent Claim
181 words
A stabilizer combination for molding compositions based on polyvinyl chloride, and/or mixed polymers containing predominantly vinyl chloride which consists essentially of (a) per 100 parts by weight of partial ester of pentaerythritol with a fatty acid of 12 to 22 carbon atoms, having an OH number between 140 and 580 and an acid number below 15, (b) 200 to 350 parts by weight of an alkaline earth metal soap selected from the group consisting of calcium stearate, zinc stearate, calcium palmitate, zinc palmitate and any mixture of said alkaline earth metal soaps, (c) 200 to 300 parts by weight of a lubricant selected from the group consisting of (1) a waxy hydrocarbon selected from the group consisting of paraffin having a solidification point between 50° C. and 110° C. and low molecular weight polyethylene having a softening point of below 140° C., (2) a fatty acid with 12 to 22 carbon atoms, and (3) a mixture of said waxy hydrocarbon and said fatty acid with 12 to 22 carbon atoms, and (d) 5 to 20 parts by weight of an antioxidant.
Claim 3
Dependent Claim
27 words
The stabilizer combination of claim 1, wherein the partial ester of pentaerythritol has an OH number between 170 and 450 and the acid number lies below 8.
Claim 4
Dependent Claim
79 words
The stabilizer combination of claim 1 wherein (a) the partial ester is the partial ester of pentaerythritol with stearic acid, (b) the alkaline earth metal soap is a member selected from the group consisting of calcium stearate, zinc stearate, and a mixture of calcium stearate and zinc stearate, (c) the lubricant is a member selected from the group consisting of paraffin, stearic acid and a mixture of paraffin and stearic acid, and (d) the antioxidant is a phenolic antioxidant.
Claim 5
Dependent Claim
49 words
A moldable composition consisting essentially of from 90% to 99.5% by weight of a thermoplastic resin selected from the group consisting of polyvinyl chloride, a mixed polymer containing mainly vinyl chloride, and any mixture thereof, and from 0.5 to 10% by weight of the stabilizer combination of claim 1.
Claim 6
Dependent Claim
37 words
The moldable composition of claim 4 which additionally contains up to 5% by weight of conventional auxiliary process additives selected from the group consisting of plasticizers, pigments, dyes, fillers, and any mixture of said auxiliary process additives.
Claim 7
Dependent Claim
13 words
The moldable composition of claim 5 wherein the thermoplastic resin is polyvinyl chloride.
Claim 8
Dependent Claim
79 words
The moldable composition of claim 6 wherein (a) the partial ester is the partial ester of pentaerythritol with stearic acid, (b) the alkaline earth metal soap is a member selected from the group consisting of calcium stearate, zinc stearate, and a mixture of calcium stearate and zinc stearate, (c) the lubricant is a member selected from the group consisting of paraffin, stearic acid and a mixture of paraffin and stearic acid, and (d) the antioxidant is a phenolic antioxidant.
Claim 9
Dependent Claim
74 words
The process of shaping moldable compositions based on polyvinyl chloride and/or mixed polymers containing mainly vinyl chloride which comprises the steps of adding at least one stabilizer to said moldable composition, subjecting the stabilized moldable composition to the action of temperature and pressure in a shaping operation, and recovering a shaped composition, the improvement consisting of utilizing from 0.5 to 10% by weight of said moldable composition of the stabilizer combination of claim 1.
Claim 10
Dependent Claim
25 words
The process of claim 8 wherein said stabilizer combination is utilized in an amount of from 2% to 4% by weight of the moldable composition.
Claim 11
Dependent Claim
13 words
The stabilizer combination of claim 1 wherein the antioxidant is a phenolic antioxidant.
Claim 12
Dependent Claim
25 words
The stabilizer combination of claim 1 wherein the antioxidant is selected from the group consisting of diphenylol propane, 2,5-bis-(1,1-dimethylpropyl)-hydroquinone, 2,6-di-tert.butyl-4-methylphenol, octadecyl-3-(3,5-di-tert.butyl-4-hydroxyphenyl) propionate, 1,1,3-tris-(5-tert.butyl-4-hydroxy-2-methyl-phenyl)-butane, and dilaurylthiodipropionate.
References Cited (Backward Citations)
US2532245A
Cited
US2711401A
Cited
US2708173A
Cited
US2862961A
Cited
US3231531A
Cited
US3285868A
Cited
US3419511A
Cited
US3423347A
Cited
US3887728A
Cited
US3929699A
Cited
US3679619A
Cited
US3983186A
Cited
US3941908A
Cited
US4116908A
Cited
US3979345A
Cited
US3988330A
Cited
US4072790A
Cited
US4026852A
Cited
US4104232A
Cited
US4119601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |