US4138537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peroxide vulcanized W-type chloroprene
Assignee: Ball Corp
•
Filing: 1977-03-01
•
Granted: 1979-02-06
•
Expires: 1997-03-01
Abstract
Abstract An antioxidant-free vulcanizable composition comprises W-type polychloroprene and a beta -substituted diperoxyketal selected from 2,2-bis-(t-butyl peroxy) butane and 1,1-bis-(t-butyl peroxy)-3,3,5-trimethyl cyclohexane.
Inventors
- 👤 Ronald J. Dembowski
- 👤 David O. Werbil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:44
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
34 words
An antioxidant-free vulcanizable composition comprising W-type polychloroprene and a vulcanizing amount of a vulcanizing agent consisting essentially of a β-substituted diperoxyketal selected from the group consisting of 2,2-bis-(t-butyl peroxy) butane and 1,1-bis-(t-butyl peroxy)-3,3,5-trimethyl cyclohexane.
Claim 2
Dependent Claim
34 words
An antioxidant-free vulcanizable composition comprising W-type polychloroprene and a vulcanizing amount of a vulcanizing agent consisting essentially of a β-substituted diperoxyketal selected from the group consisting of 2,2-bis-(t-butyl peroxy) butane and 1,1-bis-(t-butyl peroxy)-3,3,5-trimethyl cyclohexane.
Claim 3
Dependent Claim
10 words
The composition of claim 1 which also includes a filler.
Claim 4
Dependent Claim
17 words
The composition of claim 2 wherein the filler is selected from carbon black, clay and mixtures thereof.
Claim 5
Dependent Claim
11 words
The composition of claim 1 which also includes a metallic oxide.
Claim 6
Dependent Claim
11 words
The composition of claim 4 wherein the metallic oxide is magnesia.
Claim 7
Dependent Claim
10 words
The composition of claim 1 which also includes a plasticizer.
Claim 8
Dependent Claim
12 words
The composition of claim 6 wherein the plasticizer is a naphthenic oil.
Claim 9
Dependent Claim
14 words
The composition of claim 1 which also includes stearic acid as a processing acid.
Claim 10
Dependent Claim
13 words
The composition of claim 1 wherein the β-substituted diperoxyketal is 1,1-bis-(t-butyl peroxy)-3,3,5-trimethyl cyclohexane.
Claim 11
Dependent Claim
13 words
The composition of claim 1 wherein the β-substituted diperoxyketal is 2,2-bis-(t-butyl peroxy) butane.
Claim 12
Dependent Claim
60 words
An antioxidant-free vulcanizable composition comprising per 100 parts by weight W-type chloroprene, 0-300 parts by weight filler, 0-10 parts by weight processing aid, 0-200 parts by weight plasticizer, 0 to 10 parts by weight metallic oxide curing aid and 0.1-10 parts by weight of a β-substituted diperoxyketal selected from the group consisting of 2,2-bis-(t-butyl peroxy) butane and 1,1-bis-(t-butyl peroxy)-3,3,5-trimethyl cyclohexane.
Claim 13
Dependent Claim
60 words
An antioxidant-free vulcanizable composition comprising per 100 parts by weight W-type chloroprene, 0-300 parts by weight filler, 0-10 parts by weight processing aid, 0-200 parts by weight plasticizer, 0 to 10 parts by weight metallic oxide curing aid and 0.1-10 parts by weight of a β-substituted diperoxyketal selected from the group consisting of 2,2-bis-(t-butyl peroxy) butane and 1,1-bis-(t-butyl peroxy)-3,3,5-trimethyl cyclohexane.
Claim 14
Dependent Claim
11 words
A vulcanized article obtained from the vulcanizable composition of claim 1.
Claim 15
Dependent Claim
53 words
In a process for vulcanizing a W-type polychloroprene containing composition, the improvement comprising vulcanizing said composition in the absence of an antioxidant and in the presence of a vulcanizing amount of a vulcanizing agent consisting essentially of a β-substituted diperoxyketal selected from the group consisting of 2,2-(t-butyl peroxy) butane and 1,1-bis-(t-butyl peroxy)-3,3,5-trimethyl cyclohexane.
Claim 16
Dependent Claim
53 words
In a process for vulcanizing a W-type polychloroprene containing composition, the improvement comprising vulcanizing said composition in the absence of an antioxidant and in the presence of a vulcanizing amount of a vulcanizing agent consisting essentially of a β-substituted diperoxyketal selected from the group consisting of 2,2-(t-butyl peroxy) butane and 1,1-bis-(t-butyl peroxy)-3,3,5-trimethyl cyclohexane.
Claim 17
Dependent Claim
63 words
A process for vulcanizing an elastomer which comprises heating an antioxidant-free vulcanizable composition comprising W-type polychloroprene and a vulcanizing amount of a vulcanizing agent consisting essentially of a β-substituted diperoxyketal selected from the group consisting of 2,2-bis-(t-butyl peroxy) butane and 1,1-bis-(t-butyl peroxy)-3,3,5-trimethyl cyclohexane at a temperature in the range of 280° to 400° F. for a period of time sufficient to effect vulcanization.
Claim 18
Dependent Claim
63 words
A process for vulcanizing an elastomer which comprises heating an antioxidant-free vulcanizable composition comprising W-type polychloroprene and a vulcanizing amount of a vulcanizing agent consisting essentially of a β-substituted diperoxyketal selected from the group consisting of 2,2-bis-(t-butyl peroxy) butane and 1,1-bis-(t-butyl peroxy)-3,3,5-trimethyl cyclohexane at a temperature in the range of 280° to 400° F. for a period of time sufficient to effect vulcanization.
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) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |