US4283310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
P.V.C. Compositions for extrusion moulding
Assignee: Tate and Lyle PLC
•
Filing: 1979-11-06
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Granted: 1981-08-11
•
Expires: 1999-11-06
Abstract
Abstract A polyvinyl chloride composition for use in extrusion moulding contains an alkaline earth metal or zinc soap of one or more fatty acids having an iodine value of from 20-60 as the only stabilizer, a lubricant and is lead-free.
Inventors
- 👤 Kenneth James
- 👤 Frederick J. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:18
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K5/10; C08K5/101; C08K5/103; C08K2201/00; C08K2201/019; Y; Y10; Y10S; Y10S260/00; Y10S260/15
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
37 words
A lead-free stabilised PVC composition for extrusion molding containing as the only stabiliser an alkaline earth metal or zinc soap of one or more fatty acids having an iodine value of from 20-60, and containing a lubricant.
Claim 2
Dependent Claim
37 words
A lead-free stabilised PVC composition for extrusion molding containing as the only stabiliser an alkaline earth metal or zinc soap of one or more fatty acids having an iodine value of from 20-60, and containing a lubricant.
Claim 3
Dependent Claim
29 words
A composition according to claim 1, in which the said soap is present at a level of 1 to 3 parts per hundred parts by weight of PVC resin.
Claim 4
Dependent Claim
18 words
A composition according to claim 1 or claim 2, in which the said soap is a calcium soap.
Claim 5
Dependent Claim
26 words
A composition according to claim 1, in which the said soap is a soap of a mixture of fatty acids obtained from a naturally occurring triglyceride.
Claim 6
Dependent Claim
17 words
A composition according to claim 1, in which the lubricant comprises a fatty acid mixed glyceride material.
Claim 7
Dependent Claim
24 words
A composition according to claim 5, in which the mixed glycerides are in combination with one or more sugar or polyol fatty acid esters.
Claim 8
Dependent Claim
26 words
A composition according to claim 1 or claim 5, formed by adding to the PVC resin a mixture of the soap in situ in the lubricant.
Claim 9
Dependent Claim
26 words
A composition according to claim 5, containing about 2.5 parts per hundred resin of said soap and about 1-1.5 parts per hundred resin of mixed glycerides.
Claim 10
Dependent Claim
37 words
A composition according to claim 6, containing about 4 parts per hundred resin of a material comprising by weight from 30 to 50% of said soap, 20 to 35% sucrose esters and 15 to 25% mixed glycerides.
Claim 11
Dependent Claim
13 words
A composition according to claim 5, in which the lubricant comprises montan wax.
Claim 12
Dependent Claim
39 words
A stabilising composition for PVC, comprising an intimate mixture of an alkaline earth metal or zinc soap of one or more fatty acids having an iodine value of from 20 to 60, a lubricant, and one or more pigments.
Claim 13
Dependent Claim
39 words
A stabilising composition for PVC, comprising an intimate mixture of an alkaline earth metal or zinc soap of one or more fatty acids having an iodine value of from 20 to 60, a lubricant, and one or more pigments.
Claim 14
Dependent Claim
44 words
An extruded plastics article formed from a PVC composition containing a lead-free stabilised PVC composition containing as the only stabiliser an alkaline earth metal or zinc soap of one or more fatty acids having an iodine value of from 20-60, and containing a lubricant.
Claim 15
Dependent Claim
44 words
An extruded plastics article formed from a PVC composition containing a lead-free stabilised PVC composition containing as the only stabiliser an alkaline earth metal or zinc soap of one or more fatty acids having an iodine value of from 20-60, and containing a lubricant.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |