US4426497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer mixtures comprising polyethylene and 1,4 polybutadiene
Assignee: Polysar Ltd
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Filing: 1982-03-18
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Granted: 1984-01-17
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Expires: 2002-03-18
Abstract
Abstract A polymeric covering material is provided which is prepared by crosslinking a mixture comprising a polyethylene and a polybutadiene. Such material may be used as a heat shrinkable film, for splice covering tubes and as a protective coating for articles.
Inventors
- 👤 Eric G. Kent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:50
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/04; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29K; B29K2009/00; B29K2023/00; B29K2023/04; B29K2023/06; B29K2105/00; B29K2105/0088
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
A polymeric covering material which is prepared by crosslinking by reaction with an organic peroxide at a temperature of from about 125° to about 175° C. or by treatment with radiation and which contains per 100 parts by weight of polymeric materials from about 60 to about 95 parts by weight of a polyethylene and from about 5 to about 40 parts by weight of a polybutadiene having from about 90 to about 97 percent of cis-1,4 structure.
Claim 2
Dependent Claim
78 words
A polymeric covering material which is prepared by crosslinking by reaction with an organic peroxide at a temperature of from about 125° to about 175° C. or by treatment with radiation and which contains per 100 parts by weight of polymeric materials from about 60 to about 95 parts by weight of a polyethylene and from about 5 to about 40 parts by weight of a polybutadiene having from about 90 to about 97 percent of cis-1,4 structure.
Claim 3
Dependent Claim
22 words
The polymeric material of claim 1 wherein the polyethylene has a density of from about 0.95 to about 0.965 g/cm 3 .
Claim 4
Dependent Claim
22 words
The polymeric material of claim 1 wherein the polyethylene has a density of from about 0.915 to about 0.935 g/cm 3 .
Claim 5
Dependent Claim
40 words
The polymeric material of claim 1 wherein the polyethylene has a density of from about 0.95 to about 0.965 g/cm 3 and the crosslinking is by reaction with an organic peroxide selected from benzoyl peroxide, lauryl peroxide and dicumyl peroxide.
Claim 6
Dependent Claim
40 words
The polymeric material of claim 1 wherein the polyethylene has a density of from about 0.95 to about 0.965 g/cm 3 and the crosslinking is by reaction with an organic peroxide selected from benzoyl peroxide, lauryl peroxide and dicumyl peroxide.
Claim 7
Dependent Claim
40 words
The polymeric material of claim 4 wherein the polyethylene has a density of from about 0.915 to about 0.935 g/cm 3 and the crosslinking is by reaction with an organic peroxide selected from benzoyl peroxide, lauryl peroxide and dicumyl peroxide.
Claim 8
Dependent Claim
40 words
The polymeric material of claim 1 wherein the polyethylene has a density of from about 0.915 to about 0.935 g/cm 3 and the crosslinking is by reaction with an organic peroxide selected from benzoyl peroxide, lauryl peroxide and dicumyl peroxide.
Claim 9
Dependent Claim
65 words
The polymeric material of claim 1 wherein the crosslinking is by reaction with an organic peroxide present in an amount of from about 1 to about 5 parts by weight per 100 parts by weight of polymeric materials and the crosslinking is achieved by heating at a temperature of from about 125° C. to about 175° C. for from about 2 to about 60 minutes.
Claim 10
Dependent Claim
78 words
A polymeric covering material which is prepared by crosslinking by reaction with an organic peroxide at a temperature of from about 125° to about 175° C. or by treatment with radiation and which contains per 100 parts by weight of polymeric materials from about 60 to about 95 parts by weight of a polyethylene and from about 5 to about 40 parts by weight of a polybutadiene having from about 85 to about 90 percent of 1,4 structure.
Claim 11
Dependent Claim
78 words
A polymeric covering material which is prepared by crosslinking by reaction with an organic peroxide at a temperature of from about 125° to about 175° C. or by treatment with radiation and which contains per 100 parts by weight of polymeric materials from about 60 to about 95 parts by weight of a polyethylene and from about 5 to about 40 parts by weight of a polybutadiene having from about 85 to about 90 percent of 1,4 structure.
Claim 12
Dependent Claim
64 words
The polymeric material of claim 9 wherein the crosslinking is by reaction with an organic peroxide present in an amount of from about 1 to about 5 parts by weight per 100 parts by weight of polymeric materials and the crosslinking is achieved by heating at a temperature of from about 125° to about 175° C. for from about 2 to about 60 minutes.
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) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |