US4043958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retarded NBR/PVC compositions
Assignee: Uniroyal Chemical Co Inc
•
Filing: 1975-09-10
•
Granted: 1977-08-23
•
Expires: 1995-09-10
Abstract
Abstract Flame-retarded rubber compositions are disclosed which are economical to produce and which exhibit increased flame-retardance and reduced toxicity. These new compositions comprise acrylonitrile-butadiene rubber, polyvinyl chloride and an iron oxide.
Inventors
- 👤 William Paul Whelan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:04
CPC Classifications
C; C08; C08L; C08L55/00; C08L55/02; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L9/00; C08L9/02; C08L9/06; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; Y; Y10; Y10S; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A composition comprising a rubber prepared from a diene selected from the group consisting of butadiene, isoprene and mixtures thereof and from a nitrile selected from the group consisting of acrylonitrile, methacrylonitrile, alpha-chloroacrylonitrile, alpha-bromoacrylonitrile and mixtures thereof and: (a) from 1 to 200 parts by weight per 100 parts by weight of said rubber of polyvinyl chloride; and (b) from 0.1 to 50 parts by weight per 100 parts by weight of said rubber of an iron oxide selected from the group consisting of the anhydrous and hydrated forms of ferric oxide and ferrosoferric oxide and mixtures thereof.
Claim 2
Dependent Claim
98 words
A composition comprising a rubber prepared from a diene selected from the group consisting of butadiene, isoprene and mixtures thereof and from a nitrile selected from the group consisting of acrylonitrile, methacrylonitrile, alpha-chloroacrylonitrile, alpha-bromoacrylonitrile and mixtures thereof and: (a) from 1 to 200 parts by weight per 100 parts by weight of said rubber of polyvinyl chloride; and (b) from 0.1 to 50 parts by weight per 100 parts by weight of said rubber of an iron oxide selected from the group consisting of the anhydrous and hydrated forms of ferric oxide and ferrosoferric oxide and mixtures thereof.
Claim 3
Dependent Claim
67 words
A composition comprising an acrylonitrile-butadiene rubber and: (a) from 1 to 200 parts by weight per 100 parts by weight of said rubber of polyvinyl chloride; and (b) from 0.1 to 50 parts by weight per 100 parts by weight of said rubber of an iron oxide selected from the group consisting of the anhydrous and hydrated forms of ferric oxide and ferrosoferric oxide and mixtures thereof.
Claim 4
Dependent Claim
67 words
A composition comprising an acrylonitrile-butadiene rubber and: (a) from 1 to 200 parts by weight per 100 parts by weight of said rubber of polyvinyl chloride; and (b) from 0.1 to 50 parts by weight per 100 parts by weight of said rubber of an iron oxide selected from the group consisting of the anhydrous and hydrated forms of ferric oxide and ferrosoferric oxide and mixtures thereof.
Claim 5
Dependent Claim
13 words
The composition of claim 2 in which said iron oxide is ferric oxide.
Claim 6
Dependent Claim
13 words
The composition of claim 2 in which said iron oxide is ferrosoferric oxide.
Claim 7
Dependent Claim
23 words
The composition of claim 2 in which said iron oxide is a mixture of iron oxides consisting of ferric oxide and ferrosoferric oxide.
Claim 8
Dependent Claim
56 words
The composition of claim 2 in which said polyvinyl chloride is present in an amount of from 40 to 150 parts by weight per 100 parts by weight of said rubber, and said iron oxide is present in an amount of from 1 to 10 parts by weight per 100 parts by weight of said rubber.
Claim 9
Dependent Claim
68 words
A sponged composition comprising an acrylonitrile-butadiene rubber and: (a) from 1 to 200 parts by weight per 100 parts by weight of said rubber of polyvinyl chloride; and (b) from 0.1 to 50 parts by weight per 100 parts by weight of said rubber of an iron oxide selected from the group consisting of the anhydrous and hydrated forms of ferric oxide and ferrosoferric oxide and mixtures thereof.
Claim 10
Dependent Claim
68 words
A sponged composition comprising an acrylonitrile-butadiene rubber and: (a) from 1 to 200 parts by weight per 100 parts by weight of said rubber of polyvinyl chloride; and (b) from 0.1 to 50 parts by weight per 100 parts by weight of said rubber of an iron oxide selected from the group consisting of the anhydrous and hydrated forms of ferric oxide and ferrosoferric oxide and mixtures thereof.
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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |