Patent US1916267A successfully refreshed from Google Patents.
Patent US3846371A successfully refreshed from Google Patents.
US3846371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Masterbatching elastomer blends
Assignee: EIDP Inc
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Filing: 1973-04-09
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Granted: 1974-11-05
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Expires: 1993-04-09
Abstract
Abstract This invention relates to a process for preparing vulcanizates from blends of incompatible elastomers using a mutual curing system in which the mixing of each elastomeric component of the blend separately, with a carbon black selected to optimize the desired vulcanizate properties of the final blend, is completed prior to blending the resulting black-containing elastomeric mixes into the final mixture. Using this procedure it is possible to prepare vulcanizates that have higher tensile strength than those prepared by mixing simultaneously carbon black and all components of the mixture.
Inventors
- 👤 R Ro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:21
CPC Classifications
C; C08; C08L; C08L101/00; C08J; C08J3/00; C08J3/20; C08J3/22; C08K; C08K3/00; C08K3/02; C08K3/04; C08L11/00; C08L23/00; C08L23/02; C08L23/16; C08L23/26; C08L23/28; C08L23/283; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
A PROCESS FOR BLENDING A CHLOROPRENE ELASTOMERIC POLYMER AND AN ELASTOMERIC POLYMER ITS ALLYLICALLY BROMINATED DERIVATIVE COMPRISING ETHYLENE, PROPYLENE AND AT LEAST ONE NON-CONJUGATED DIENE WHICH CONSISTS ESSENTIALLY OF SEPARATELY ADDING TO SAID CHLOROPRENE POLYMER A SEMI-REINFORCING BLACK, AND ADDING A HIGH REINFORCING BLACK TO THE ETHYLENE CONTAINING POLYMER, BLENDING THE TWO BLACK CONTAINING ELASTOMERS IN THE UNCURED STATE, CURING THE ELASTOMERS IN THE PRESENCE OF ONE OR MORE CURING AGENTS COMPATIBLE WITH THE ELASTOMERS IN THE BLEND AND RECOVERING A BLEND OF LEASTOMERS HAVING AT LEAST ONE OPTIMIZED PROPERTY.
Claim 2
Dependent Claim
90 words
A PROCESS FOR BLENDING A CHLOROPRENE ELASTOMERIC POLYMER AND AN ELASTOMERIC POLYMER ITS ALLYLICALLY BROMINATED DERIVATIVE COMPRISING ETHYLENE, PROPYLENE AND AT LEAST ONE NON-CONJUGATED DIENE WHICH CONSISTS ESSENTIALLY OF SEPARATELY ADDING TO SAID CHLOROPRENE POLYMER A SEMI-REINFORCING BLACK, AND ADDING A HIGH REINFORCING BLACK TO THE ETHYLENE CONTAINING POLYMER, BLENDING THE TWO BLACK CONTAINING ELASTOMERS IN THE UNCURED STATE, CURING THE ELASTOMERS IN THE PRESENCE OF ONE OR MORE CURING AGENTS COMPATIBLE WITH THE ELASTOMERS IN THE BLEND AND RECOVERING A BLEND OF LEASTOMERS HAVING AT LEAST ONE OPTIMIZED PROPERTY.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said non-conjugated diene is 1,4-hexadiene.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein said blending takes place in a rubber mill or an internal mixer.
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein the high reinforcing black is selected from super abrasion furnace black and high abrasion furnace black.
Claim 6
Dependent Claim
18 words
The process of claim 4 wherein the semi-reinforcing black is selected from medium thermal and semi-reinforcing furnace black.
References Cited (Backward Citations)
GB962519A
Cited
US3224985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |