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US4558102A
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Method for curing halogen-containing rubber composition
Assignee: Kyowa Chemical Industry Co Ltd
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Filing: 1984-08-01
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Granted: 1985-12-10
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Expires: 2004-08-01
Abstract
Abstract A curable rubber composition composed of a halogen-containing rubber and at least one member selected from the group consisting of a vulcanizing agent and a vulcanization accelerator other than thiazole-type vulcanization accelerators is cured under heat in the presence of, as an acid acceptor, a calcinated product of a hydrotalcite compound of the following formula Mx2+Al2(OH)2x+6-nz(An-)z.mH2O (1) wherein M2+ represents at least one metal element selected from the group consisting of Mg and Zn, An- represents an anion having a valence of n, m represents a positive number, and x and z represent positive numbers satisfying the following expressions 12>x>/=2, z</=2. The cured product has improved water resistance.
Inventors
- 👤 Shigeo Miyata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:18
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
145 words
In a method for curing a curable rubber composition composed of a halogen-containing rubber and a member selected from the group consisting of a vulcanizing agent and a vulcanization accelerator other than thiazole-type vulcanization accelerators under heat in the presence of an acid acceptor, the improvement wherein said composition is cured under heat in the presence of, as said acid acceptor, a calcinated product of a hydrotalcite compound, obtained by calcination at a temperature of 200° C. to 900° C., of the following formula M.sub.x.sup.2+ Al.sub.2 (OH).sub.2x+6-nz (A.sup.n-).sub.z.mH.sub.2 O (1) wherein M 2+ represents at least one metal element selected from the group consisting of Mg and Zn, A n- represents an anion having a valence of n, m represents a positive number, and x and z represent psotive numbers satisfying the following expressions 12>x≦2, z≦2, thereby giving a cured product having increased water resistance.
Claim 2
Dependent Claim
145 words
In a method for curing a curable rubber composition composed of a halogen-containing rubber and a member selected from the group consisting of a vulcanizing agent and a vulcanization accelerator other than thiazole-type vulcanization accelerators under heat in the presence of an acid acceptor, the improvement wherein said composition is cured under heat in the presence of, as said acid acceptor, a calcinated product of a hydrotalcite compound, obtained by calcination at a temperature of 200° C. to 900° C., of the following formula M.sub.x.sup.2+ Al.sub.2 (OH).sub.2x+6-nz (A.sup.n-).sub.z.mH.sub.2 O (1) wherein M 2+ represents at least one metal element selected from the group consisting of Mg and Zn, A n- represents an anion having a valence of n, m represents a positive number, and x and z represent psotive numbers satisfying the following expressions 12>x≦2, z≦2, thereby giving a cured product having increased water resistance.
Claim 3
Dependent Claim
30 words
The method of claim 1 wherein the amount of the calcination product is about 1 to about 40 parts by weight per 100 parts by weight of the halogen-containing rubber.
Claim 4
Dependent Claim
26 words
The method of claim 1 wherein the amount of the vulcanizing agent is about 0.1 to about 10% based on the weight of the halogen-containing rubber.
Claim 5
Dependent Claim
26 words
The method of claim 1 wherein the amount of the vulcanization accelerator is about 0.1 to about 10% based on the weight of the halogen-containing rubber.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein the curing is carried out at about 10° to about 250° C.
Claim 7
Dependent Claim
16 words
The method of claim 1 wherein the calcination product is surface-treated with an anionic surface-active agent.
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) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |