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Patent US4464240A successfully refreshed from Google Patents.
US4464240A
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Thiodipropionoyl bis (halo benzhydrazide) additives for polymers
Assignee: Canusa Coating Systems Ltd
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Filing: 1982-11-08
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Granted: 1984-08-07
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Expires: 2002-11-08
Abstract
Abstract Compounds of the formula (I) ##STR1## where Y is H, Cl or Br with at least one Y always being Cl or Br and X is S or S--S. Polymer compositions including antioxidants and the compounds or the compound alone are useful as electrical insulation e.g., for copper cable, as heat shrinkable (heat recoverable) parts or as other plastic parts to improve the retention of mechanical and/or electrical properties of the insulation or parts.
Inventors
- 👤 Ralph H. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:24
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07D209/56; C07D209/58; C07D209/72; C07D209/76; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; C08K5/3725; C08K5/378; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1331; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
30 words
A compound of the formula (I) ##STR7## where X is S or S--S and Y is H, Cl or Br with at least one Y always being Cl or Br.
Claim 2
Dependent Claim
30 words
A compound of the formula (I) ##STR7## where X is S or S--S and Y is H, Cl or Br with at least one Y always being Cl or Br.
Claim 3
Dependent Claim
15 words
The compound of claim 1 in which X is S and each Y is Br.
Claim 4
Dependent Claim
15 words
The compound of claim 1 in which X is S and each Y is Cl.
Claim 5
Dependent Claim
22 words
A composition comprising a polymer and the compound of claim 1 in an amount sufficient to impart flame retardant and antioxidant properties.
Claim 6
Dependent Claim
13 words
The composition of claim 4 in which the polymer is polyethylene or polypropylene.
Claim 7
Dependent Claim
26 words
The composition of claim 4 in which the amount of the compound of formula (I) comprises 0.05 to 150% based on the weight of the polymer.
Claim 8
Dependent Claim
22 words
As an article of manufacture, an electrical conductor and a layer of insulation about said conducter comprising the composition of claim 4.
Claim 9
Dependent Claim
17 words
The article of claim 7 in which X is S or S--S and each Y is Br.
Claim 10
Dependent Claim
9 words
The composition of claim 2 containing an additional antioxidant.
Claim 11
Dependent Claim
44 words
The composition of claim 9 in which the ratio of a compound of formula to the antioxidant is 1:10 to 10:1 and the amount of the antioxidant and a compound of formula (I) is 0.05% to 10% based on the weight of the polymer.
Claim 12
Dependent Claim
18 words
The composition of claim 9 in which the additional antioxidant is a hindered phenolic or an aromatic amine.
Claim 13
Dependent Claim
20 words
The composition of claim 1 which includes 0.05% to 150% of the compound based on the weight of the polymer.
Claim 14
Dependent Claim
15 words
The composition of claim 12 in which X is S and each Y is Br.
Claim 15
Dependent Claim
16 words
The composition according to claim 13 in which in which the compound is 50% to 100%.
Claim 16
Dependent Claim
63 words
As an article of manufacturer, a heat recoverable article comprising a polymer and the compound of formula (1) ##STR8## where X is S or S--S and Y is H, Cl or Br provided that at least one Y is always Cl or Br, in an amount sufficient to impart flame retardant and antioxidant properties in the presence or absence of an additional antioxidant.
Claim 17
Dependent Claim
63 words
As an article of manufacturer, a heat recoverable article comprising a polymer and the compound of formula (1) ##STR8## where X is S or S--S and Y is H, Cl or Br provided that at least one Y is always Cl or Br, in an amount sufficient to impart flame retardant and antioxidant properties in the presence or absence of an additional antioxidant.
Claim 18
Dependent Claim
12 words
The article of claim 15 in which the polymer is a polyolefin.
Claim 19
Dependent Claim
16 words
The article of claim 6 in which the polyethylene is cross-linked with silane or by irradiation.
Claim 20
Dependent Claim
12 words
The article of claim 11 in which the silane is vinyl trimethoxysilane.
Claim 21
Dependent Claim
14 words
The article of claim 15 in the form of a hollow tube and member.
References Cited (Backward Citations)
US861006A
Cited
US3061642A
Cited
UST861006I4
Cited
GB1287934A
Cited
US4374220A
Cited
JPS5064337A
Cited
US4178280A
Cited
US4087405A
Cited
US4189423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |