US3904591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary accelerators for sulfur-cured elastomers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1971-05-20
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Granted: 1975-09-09
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Expires: 1991-05-20
Abstract
Abstract Simple metal salts are found to be useful as primary accelerators for the sulfur vulcanization of nonpolar, unsaturated hydrocarbon rubbers. Useful metals include those of Group I-A, Group II-A, and transition metals of the periodic table including mixtures thereof. The metals are usually employed in the form of metallo-organic compounds. However, certain inorganic metal salts such as metal halides, carbonates and nitrates are also applicable.
Inventors
- 👤 Wilbur F Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:44
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K3/00; C08K3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A PROCESS FOR THE SULFUR VULCANIZATION OF A NONPOLAR UNSATURATED HYDROCARBON RUBBER WHICH CONSISTS ESSENTIALLY OF: A. ADDING TO 100 PARTS OF SAID RUBBER A VULCANIZABLE AMOUNT OF SULFUR AND FROM 0.25 TO 10 PARTS OF A PRIMARY ACCELERATOR CONSISTING ESSENTIALLY OF A METAL SALT THE ANION OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF ACETATE CHLORIDE NITRATE THIOCYANATE OCTOATE, NAPHTHENATE OR NEODECANOATE, AND THE METAL BEING SELECTED FROM THE METALS OF GROUPS I-A, GROUP II-A OR TRANSITION METALS WHEREIN SAID SALT HAS A LATTICE ENERGY OF LESS THAN ABOUT 700 KCAL/MOLE WHEREIN THE METAL SALT IS COMPLEXED WITH DIETHYLENE GLYCOL DIMETHYL ETHER(DIGLYME), AND B. HEATING THE PRODUCT OF STEP (A) TO A TEMPERATURE IN THE RANGE OF ABOUT 300* TO ABOUT 550*F IN ORDER TO EFFECT CURE.
Claim 2
Dependent Claim
129 words
A PROCESS FOR THE SULFUR VULCANIZATION OF A NONPOLAR UNSATURATED HYDROCARBON RUBBER WHICH CONSISTS ESSENTIALLY OF: A. ADDING TO 100 PARTS OF SAID RUBBER A VULCANIZABLE AMOUNT OF SULFUR AND FROM 0.25 TO 10 PARTS OF A PRIMARY ACCELERATOR CONSISTING ESSENTIALLY OF A METAL SALT THE ANION OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF ACETATE CHLORIDE NITRATE THIOCYANATE OCTOATE, NAPHTHENATE OR NEODECANOATE, AND THE METAL BEING SELECTED FROM THE METALS OF GROUPS I-A, GROUP II-A OR TRANSITION METALS WHEREIN SAID SALT HAS A LATTICE ENERGY OF LESS THAN ABOUT 700 KCAL/MOLE WHEREIN THE METAL SALT IS COMPLEXED WITH DIETHYLENE GLYCOL DIMETHYL ETHER(DIGLYME), AND B. HEATING THE PRODUCT OF STEP (A) TO A TEMPERATURE IN THE RANGE OF ABOUT 300* TO ABOUT 550*F IN ORDER TO EFFECT CURE.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |