Polyethylene compositions and closures for bottles
US-9221966-B2 · Dec 29, 2015 · US
Rubber composition for heat-resistant conveyor belts and heat-resistant conveyor belt
US10040634B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10040634-B2 |
| Application number | US-201515329242-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 16, 2015 |
| Priority date | Jul 25, 2014 |
| Publication date | Aug 7, 2018 |
| Grant date | Aug 7, 2018 |
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Abstract
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A rubber composition for heat-resistant conveyor belts contains an ethylene-1-butene copolymer having a Mooney viscosity at 125° C. of 20 or greater, and an ethylene-propylene copolymer having a Mooney viscosity at 125° C. of 20 or greater and an ethylene content of 40 to 60 mass %, and the mass ratio of the ethylene-1-butene copolymer to the ethylene-propylene copolymer is 10/90 to 90/10.
First claim
Opening claim text (preview).
The invention claimed is: 1. A rubber composition for heat-resistant conveyor belts comprising: an ethylene-1-butene copolymer having a Mooney viscosity at 125° C. of 20 or greater; and an ethylene-propylene copolymer having a Mooney viscosity at 125° C. of 20 or greater and an ethylene content of 40 to 55 mass %, wherein a mass ratio of the ethylene-1-butene copolymer to the ethylene-propylene copolymer is 10/90 to 90/10. 2. The rubber composition for heat-resistant conveyor belts according to claim 1 , wherein a Mooney viscosity at 125° C. of the ethylene-1-butene copolymer is 30 or greater. 3. The rubber composition for heat-resistant conveyor belts according to claim 1 , wherein an ethylene content of the ethylene-propylene copolymer is 40 mass % or greater and less than 60 mass %. 4. The rubber composition for heat-resistant conveyor belts according to claim 1 , further comprising an organic peroxide, wherein a content of the organic peroxide is from 0.011 to 0.020 molar equivalents relative to 100 parts by mass of the total of the ethylene-1-butene copolymer and the ethylene-propylene copolymer. 5. A heat-resistant conveyor belt comprising the rubber composition for heat-resistant conveyor belts according to claim 1 . 6. The rubber composition for heat-resistant conveyor belts according to claim 2 , wherein an ethylene content of the ethylene-propylene copolymer is 40 mass % or greater and less than 60 mass %. 7. The rubber composition for heat-resistant conveyor belts according to claim 6 , further comprising an organic peroxide, wherein a content of the organic peroxide is from 0.011 to 0.020 molar equivalents relative to 100 parts by mass of the total of the ethylene-1-butene copolymer and the ethylene-propylene copolymer. 8. The rubber composition for heat-resistant conveyor belts according to claim 2 , further comprising an organic peroxide, wherein a content of the organic peroxide is from 0.011 to 0.020 molar equivalents relative to 100 parts by mass of the total of the ethylene-1-butene copolymer and the ethylene-propylene copolymer. 9. The rubber composition for heat-resistant conveyor belts according to claim 3 , further comprising an organic peroxide, wherein a content of the organic peroxide is from 0.011 to 0.020 molar equivalents relative to 100 parts by mass of the total of the ethylene-1-butene copolymer and the ethylene-propylene copolymer.
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- What does patent US10040634B2 cover?
- A rubber composition for heat-resistant conveyor belts contains an ethylene-1-butene copolymer having a Mooney viscosity at 125° C. of 20 or greater, and an ethylene-propylene copolymer having a Mooney viscosity at 125° C. of 20 or greater and an ethylene content of 40 to 60 mass %, and the mass ratio of the ethylene-1-butene copolymer to the ethylene-propylene copolymer is 10/90 to 90/10.
- Who is the assignee on this patent?
- Yokohama Rubber Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08L23/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 07 2018 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).