US4501840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline modified pentaerythritol stabilizer for vinyl chloride resin
Assignee: Evonik Operations GmbH
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Filing: 1983-10-20
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Granted: 1985-02-26
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Expires: 2003-10-20
Abstract
Abstract Pentaerythritol is treated at a temperature of about 180° to 220° C. with a strongly alkaline acting material, e.g. calcium oxide. The thus treated pentaerythritol serves as a costabilizer e.g., with the salt of a polyvalent metal and a carboxylic acid, for a vinyl chloride resin, e.g. polyvinyl chloride and has outstanding properties as such.
Inventors
- 👤 Peter Werle
- 👤 Wolfgang Merk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/057; C08K9/00; C08K9/02
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
31 words
A process for producing a costabilizer suitable for the stabilization of polyvinyl chloride comprising heating pentaerythritol at a temperature of about 180° to 220° C. with a strongly alkaline acting material.
Claim 2
Dependent Claim
31 words
A process for producing a costabilizer suitable for the stabilization of polyvinyl chloride comprising heating pentaerythritol at a temperature of about 180° to 220° C. with a strongly alkaline acting material.
Claim 3
Dependent Claim
22 words
A process according to claim 1 wherein the alkaline acting material is an alkali metal or alkaline earth metal oxide or hydroxide.
Claim 4
Dependent Claim
30 words
A process according to claim 1 wherein the pentaerythritol is treated with about 0.2 to 2.0 parts by weight of alkaline acting material per 100 parts by weight of pentaerythritol.
Claim 5
Dependent Claim
14 words
A process according to claim 3 wherein the alkaline acting material is calcium oxide.
Claim 6
Dependent Claim
14 words
A process according to claim 1 wherein the alkaline acting material is calcium oxide.
Claim 7
Dependent Claim
17 words
A process according to claim 5 wherein the pentaerythritol contains 5 to 20 weight percent of dipentaerythritol.
Claim 8
Dependent Claim
17 words
A process according to claim 4 wherein the pentaerythritol contains 5 to 20 weight percent of dipentaerythritol.
Claim 9
Dependent Claim
17 words
A process according to claim 3 wherein the pentaerythritol contains 5 to 20 weight percent of dipentaerythritol.
Claim 10
Dependent Claim
17 words
A process according to claim 1 wherein the pentaerythritol contains 5 to 20 weight percent of dipentaerythritol.
Claim 11
Dependent Claim
63 words
A vinyl chloride resin composition having improved resistance to heat containing a stabilizer mixture for said resin comprising a costabilizer prepared by heating pentaerythritol at a temperature of about 180° to 220° C. with a strongly alkaline acting material and a vinyl chloride resin stabilizer compatible therewith, the costabilizer being present in an amount sufficient to improve the stabilizing effect of the stabilizer.
Claim 12
Dependent Claim
63 words
A vinyl chloride resin composition having improved resistance to heat containing a stabilizer mixture for said resin comprising a costabilizer prepared by heating pentaerythritol at a temperature of about 180° to 220° C. with a strongly alkaline acting material and a vinyl chloride resin stabilizer compatible therewith, the costabilizer being present in an amount sufficient to improve the stabilizing effect of the stabilizer.
Claim 13
Dependent Claim
17 words
A vinyl chloride resin composition according to claim 10 wherein the vinyl chloride resin is polyvinyl chloride.
Claim 14
Dependent Claim
25 words
A vinyl chloride resin composition according to claim 11 wherein the vinyl chloride resin stabilizer is a polyvalent metal salt of a higher fatty acid.
Claim 15
Dependent Claim
25 words
A vinyl chloride resin composition according to claim 10 wherein the vinyl chloride resin stabilizer is a polyvalent metal salt of a higher fatty acid.
Claim 16
Dependent Claim
25 words
A vinyl chloride resin composition according to claim 11 wherein the alkaline acting material is an alkali metal or alkaline earth metal oxide or hydroxide.
Claim 17
Dependent Claim
25 words
A vinyl chloride resin composition according to claim 14 wherein the vinyl chloride resin stabilizer is a polyvalent metal salt of a higher fatty acid.
Claim 18
Dependent Claim
25 words
A vinyl chloride resin composition according to claim 13 wherein the vinyl chloride resin stabilizer is a polyvalent metal salt of a higher fatty acid.
Claim 19
Dependent Claim
24 words
A vinyl chloride composition according to claim 10 wherein the alkaline acting material is an alkali metal or alkaline earth metal oxide or hydroxide.
Claim 20
Dependent Claim
32 words
A vinyl chloride composition according to claim 17 wherein the pentaerythritol is treated with about 0.2 to 2.0 parts by weight of alkaline acting material per 100 parts by weight of pentaerythritol.
Claim 21
Dependent Claim
33 words
A vinyl chloride resin composition according to claim 13 wherein the pentaerythritol is treated with about 0.2 to 2.0 parts by weight of alkaline acting material per 100 parts by weight of pentaerythritol.
Claim 22
Dependent Claim
32 words
A vinyl chloride resin composition according to claim 19 wherein the polyvalent metal salt is a magnesium, calcium, or zinc salt of an unbranched fatty acid having 10 to 24 carbon atoms.
Claim 23
Dependent Claim
23 words
A resin composition according to claim 10 wherein the alkaline acting material is an alkali metal or alkaline earth metal oxide or hydroxide.
Claim 24
Dependent Claim
15 words
A resin composition according to claim 21 wherein the alkaline acting material is calcium oxide.
Claim 25
Dependent Claim
19 words
A process according to claim 1 wherein the materials heated consist of the pentaerythritol and the strongly alkaline material.
Claim 26
Dependent Claim
22 words
A process according to claim 23 wherein the strongly alkaline material is an alkali metal or alkaline earth metal oxide or hydroxide.
Claim 27
Dependent Claim
18 words
A process according to claim 1 including the step of cooling the thus treated pentaerythritol until it solidifies.
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) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |