US4465571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thiodipropionoyl bis(halo 5-norbornene 2,3-dicarboxylic acid hydrazide) additives for polymers
Assignee: Canusa Coating Systems Ltd
•
Filing: 1982-11-08
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Granted: 1984-08-14
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Expires: 2002-11-08
Abstract
Abstract A compound of the formula (I) ##STR1## 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 09:27
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; Y10T428/1352; Y10T428/1397; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
19 words
A compound of the formula (I) ##STR7## where X is S or S-S and Y is Cl or Br.
Claim 2
Dependent Claim
19 words
A compound of the formula (I) ##STR7## where X is S or S-S and Y is Cl or Br.
Claim 3
Dependent Claim
11 words
The compound of claim 1 in which each Y is Cl.
Claim 4
Dependent Claim
11 words
The compound of claim 1 in which each Y is Br.
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
8 words
The composition of claim 4 containing additional antioxidant.
Claim 7
Dependent Claim
22 words
As an article of manufacture, an electrical conductor and a layer of insulation about said conductor comprising the composition of claim 4.
Claim 8
Dependent Claim
13 words
The composition of claim 4 in which the polymer is polyethylene or polypropylene.
Claim 9
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 10
Dependent Claim
12 words
The composition of claim 5 in the form of a hollow article.
Claim 11
Dependent Claim
12 words
The composition of claim 5 in which the polymer is a polyolefin.
Claim 12
Dependent Claim
45 words
The composition of claim 5 in which the ratio of the compound of formula I to the antioxidant is 1:10 to 10:1 and the amount of the antioxidant and the compound of formula (I) is 0.05% to 10% based on the weight of the polymer.
Claim 13
Dependent Claim
18 words
The composition of claim 5 in which the additional antioxidant is a hindered phenolic or an aromatic amine.
Claim 14
Dependent Claim
13 words
The composition of claim 9 in which the hollow article is heat shrinkable.
Claim 15
Dependent Claim
51 words
As an article of manufacturer, a heat recoverable article comprising a polymer and the compound of formula (I) ##STR8## in an amount sufficient to impart flame retardant and antioxidant properties in the presence or absence of an additional antioxidant, where S is S or S-S and Y is Cl or Br.
Claim 16
Dependent Claim
51 words
As an article of manufacturer, a heat recoverable article comprising a polymer and the compound of formula (I) ##STR8## in an amount sufficient to impart flame retardant and antioxidant properties in the presence or absence of an additional antioxidant, where S is S or S-S and Y is Cl or Br.
Claim 17
Dependent Claim
12 words
The article of claim 14 in which the polymer is a polyolefin.
Claim 18
Dependent Claim
11 words
The article of claim 15 in which the polymer is polyethylene.
Claim 19
Dependent Claim
16 words
The article of claim 16 in which the polyethylene is cross-linked with silane or by irradiation.
Claim 20
Dependent Claim
12 words
The article of claim 17 in which the silane is vinyl trimethoxysilane.
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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) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |