US4713409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanizable polymeric compositions containing a zinc dimethacrylate adjuvant and method for preparing the adjuvant
Assignee: Bridgestone Americas Tire Operations LLC
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Filing: 1986-04-17
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Granted: 1987-12-15
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Expires: 2006-04-17
Abstract
Abstract Vulcanizable polymeric compositions comprising certain rubbery polymers or polymer blends, a zinc dimethacrylate adjuvant having a surface area of from about 3.7 to about 5.4 m2/g or more and a peroxide curing agent are provided. Polymeric compositions which contain 25 parts by weight or more of the zinc dimethacrylate adjuvant per 100 parts by weight of rubbery polymer in the absence of reinforcing fillers exhibit excellent strength and hysteresis characteristcs when cured. The surface area of the zinc dimethacrylate adjuvant along with its method of preparation are extremely important factors in the excellent properties obtained when polymeric compositions containing the adjuvant are cured.
Inventors
- 👤 Robert A. Hayes
- 👤 Wendell R. Conard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:09
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/41; C07C51/412; C07F; C07F3/00; C07F3/003; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
75 words
Vulcanizable polymeric compositions comprising: (a) rubbery polymers selected from the group consisting of natural rubber, ethylene/propylene copolymers, ethylene/propylene/diene terpolymers, styrene/butadiene copolymers, nitrile rubbers, neoprene and blends thereof; (b) from about 25 to about 85 parts by weight per 100 parts by weight of said rubbery polymers of a zinc dimethacrylate having a surface area of from about 3.7 to about 5.4 m 2 /g; and (c) a cure effective amount of a peroxide curing agent.
Claim 2
Dependent Claim
75 words
Vulcanizable polymeric compositions comprising: (a) rubbery polymers selected from the group consisting of natural rubber, ethylene/propylene copolymers, ethylene/propylene/diene terpolymers, styrene/butadiene copolymers, nitrile rubbers, neoprene and blends thereof; (b) from about 25 to about 85 parts by weight per 100 parts by weight of said rubbery polymers of a zinc dimethacrylate having a surface area of from about 3.7 to about 5.4 m 2 /g; and (c) a cure effective amount of a peroxide curing agent.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein said rubbery polymer is natural rubber.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein said rubbery polymer is an ethylene/propylene/diene monomer terpolymer.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein said rubbery polymer is a styrene/butadiene copolymer.
Claim 6
Dependent Claim
13 words
The composition of claim 1 wherein said rubbery polymer is a nitrile rubber.
Claim 7
Dependent Claim
19 words
The composition of claim 1 wherein said blend is a 50:50 blend of natural rubber and an ethylene/propylene/diene/monomer terpolymer.
Claim 8
Dependent Claim
19 words
The composition of claim 1 wherein said blend is a 50:50 blend of natural rubber and a styrene/butadiene copolymer.
Claim 9
Dependent Claim
21 words
The composition of claim 1 wherein said blend is a 50:50 blend of a styrene/butadiene copolymer and an ethylene/propylene/diene monomer terpolymer.
Claim 10
Dependent Claim
20 words
The composition of claim 1 wherein said blend is a 50:50 blend of an ethylene/propylene/diene monomer terpolymer and nitrile rubber.
Claim 11
Dependent Claim
31 words
The composition of claim 1 wherein said zinc dimethacrylate is present in an amount of from 50 to 80 parts by weight per 100 parts by weight of said rubbery polymers.
Claim 12
Dependent Claim
14 words
The composition of claim 1 wherein said peroxide curing agent is bis-(t-butyl peroxy)diisopropyl benzene.
Claim 13
Dependent Claim
33 words
The composition of claim 1 wherein said peroxide curing agent is present in an amount of from about 0.2 to about 2.0 parts by weight per 100 parts by weight of rubbery polymer.
Claim 14
Dependent Claim
22 words
The composition of claim 1 further comprising from about 5 to about 60 parts by weight of a reinforcing agent or filler.
Claim 15
Dependent Claim
12 words
The composition of claim 13 wherein said reinforcing agent is carbon black.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |