Aqueous multi-stage emulsion copolymer compositions for use in joinery applications
US-2017174905-A1 · Jun 22, 2017 · US
Method for producing rubber composition, and rubber composition
US9670336B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9670336-B2 |
| Application number | US-201414774244-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 24, 2014 |
| Priority date | Mar 28, 2013 |
| Publication date | Jun 6, 2017 |
| Grant date | Jun 6, 2017 |
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- Title
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Abstract
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We provide a method for producing a rubber composition that includes a rubber component (A) including natural rubber, at least one filler (B) selected from an inorganic filler and carbon black, and a hydrazide compound (C), the method comprising compounding in an optional preliminary compounding stage and a plurality of compounding stages, and adding the hydrazide compound (C) and kneading in the preliminary compounding stage and/or a first compounding stage, the hydrazide compound (C) being represented by general formula (I): R—CONHNH 2 , where R represents an alkyl group having from 1 to 30 carbon atoms, a cycloalkyl group having from 3 to 30 carbon atoms, or an aryl group. We also provide a rubber composition produced with this method.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a rubber composition that includes a rubber component (A) including natural rubber, at least one filler (B) selected from an inorganic filler and carbon black, and a monohydrazide compound (C), the method comprising: compounding in an optional preliminary compounding stage and a plurality of compounding stages, the preliminary compounding stage and the plurality of compounding stages being carried out in a single kneader, adding the monohydrazide compound (C) and kneading in the preliminary compounding stage and/or a first compounding stage, the monohydrazide compound (C) being represented by general formula (I): R—CONHNH 2 (I) where R represents an alkyl group having from 1 to 30 carbon atoms, a cycloalkyl group having from 3 to 30 carbon atoms, or an aryl group, and adding a portion or all of an anti-aging agent and kneading in a final compounding stage. 2. The method of claim 1 , wherein the R group of the monohydrazide compound (C) represented by general formula (I) is selected from the group consisting of alkyl groups having from 1 to 10 carbon atoms. 3. The method of claim 1 , wherein the monohydrazide compound (C) is added in the preliminary compounding stage. 4. The method of claim 1 , wherein the monohydrazide compound (C) is propionic acid hydrazide. 5. The method of claim 1 , wherein the filler (B) is carbon black having a nitrogen adsorption specific surface area of 40 m 2 /g to 250 m 2 /g or a DBP absorption of 20 mL/100 g to 200 mL/100 g.
Assignees
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Classifications
Compositions of natural rubber · CPC title
Two or more independent types of crosslinking for one or more polymers · CPC title
Carbon · CPC title
- C08K5/25Primary
Carboxylic acid hydrazides · CPC title
Characterised by the use of natural rubber · CPC title
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- What does patent US9670336B2 cover?
- We provide a method for producing a rubber composition that includes a rubber component (A) including natural rubber, at least one filler (B) selected from an inorganic filler and carbon black, and a hydrazide compound (C), the method comprising compounding in an optional preliminary compounding stage and a plurality of compounding stages, and adding the hydrazide compound (C) and kneading in t…
- Who is the assignee on this patent?
- Bridgestone Corp
- What technology area does this patent fall under?
- Primary CPC classification C08K5/25. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 06 2017 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).