Rubber composition, and vulcanizate and molded article thereof
US-9522993-B2 · Dec 20, 2016 · US
Chloroprene rubber composition, and vulcanizate and molding thereof
US9505918B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9505918-B2 |
| Application number | US-201113988931-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 21, 2011 |
| Priority date | Nov 26, 2010 |
| Publication date | Nov 29, 2016 |
| Grant date | Nov 29, 2016 |
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Abstract
Official abstract text for this publication.
To provide a chloroprene rubber composition providing good permanent compression set and excellent mechanical strength, a vulcanizate of the composition, and a molded article of the composition. A chloroprene rubber composition including a chloroprene rubber and a natural rubber in a total amount of 100 parts by mass, a copolymer of styrene and butadiene in an amount of 0.1 to 10 parts by mass, ethylene thiourea in an amount of 0.1 to 3.0 parts by mass, and dipentamethylenethiuram tetrasulfide in an amount of 0.1 to 3.0 parts by mass is vulcanized after or during molding of the composition to yield a vulcanized molding.
First claim
Opening claim text (preview).
The invention claimed is: 1. A chloroprene rubber composition comprising: a chloroprene rubber and a natural rubber in a total amount of 100 parts by mass; a block copolymer of styrene and butadiene in an amount of 0.1 to 10 parts by mass; ethylene thiourea in an amount of 0.1 to 3.0 parts by mass; and dipentamethylenethiuram tetrasulfide in an amount of 0.1 to 3.0 parts by mass, wherein the blending ratio of the chloroprene rubber and the natural rubber (chloroprene rubber/natural rubber) is 60/40 to 95/5 by mass ratio. 2. The chloroprene rubber composition according to claim 1 , wherein the chloroprene rubber includes a 2,3-dichiorobutadiene unit in an amount of 5 to 20% by mass. 3. A vulcanizate obtained by vulcanization of the chloroprene rubber composition according to claim 1 . 4. A molding obtained by vulcanization of the chloroprene rubber composition according to claim 1 after or during molding of the composition. 5. The molding according to claim 4 , wherein the molding is a wiper blade or a vibration isolator. 6. The chloroprene rubber composition according to claim 1 , wherein the block copolymer of styrene and butadiene includes styrene and butadiene in a mass ratio (styrene/butadiene) of 25/75 to 45/55. 7. A vulcanizate obtained by vulcanization of the chloroprene rubber composition according to claim 6 . 8. A molding obtained by vulcanization of the chloroprene rubber composition according to claim 6 after or during molding of the composition. 9. The molding according to claim 8 , wherein the molding is a wiper blade or a vibration isolator. 10. The chloroprene rubber composition according to claim 1 , wherein the blending ratio of the chloroprene rubber and the natural rubber (chloroprene rubber/natural rubber) is 60/40 by mass ratio. 11. The chloroprene rubber composition according to claim 1 , wherein the blending ratio of the chloroprene rubber and the natural rubber (chloroprene rubber/natural rubber) is 95/5 by mass ratio.
Assignees
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Classifications
Rubber derivatives containing halogen · CPC title
- C08L11/00Primary
Compositions of homopolymers or copolymers of chloroprene · CPC title
Thiurams, {i.e. compounds containing[IMAGE cpc-sch-C08K-1011.gif] groups} · CPC title
Compositions of natural rubber · CPC title
of vinyl-aromatic monomers and conjugated dienes · CPC title
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Frequently asked questions
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- What does patent US9505918B2 cover?
- To provide a chloroprene rubber composition providing good permanent compression set and excellent mechanical strength, a vulcanizate of the composition, and a molded article of the composition. A chloroprene rubber composition including a chloroprene rubber and a natural rubber in a total amount of 100 parts by mass, a copolymer of styrene and butadiene in an amount of 0.1 to 10 parts by mass,…
- Who is the assignee on this patent?
- Yamagishi Uichiro, Abe Yasushi, Denka Company Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08L11/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 29 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).