The present invention relates to an elastomer rubber composition containing a carboxylated rubber polymer and a fluorinated additive. The present invention is also directed to an elastomer composition containing a hydrogenated carboxylated nitrile rubber and a fluorinated additive.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
The FIGURE illustrates the variation of the melt viscosity of a standard elastomeric formulation compared to those containing a fluorinated additive.
Claims
1. An elastomeric composition comprising a carboxylated rubber and a fluorinated additive.
2. The composition according to claim 1, wherein the carboxylated rubber is selected from the group consisting of XSBR, XNBR, HXNBR, FKM, ACM and EAM and blends thereof.
3. The composition according to claim 2, wherein carboxylated rubber is XNBR.
4. The composition according to claim 2, wherein the carboxylated rubber is HXNBR.
5. The composition according to claim 1, wherein the fluoroadditive is present in an amount from 0.1-1 phr.
6. The composition according to claim 5, wherein the fluoroadditive is present in an amount for 0.5 to 1 phr.
7. The composition according to claim 1, wherein the fluorinated additive is of the general Formula 1
R˜(CH2)nX (1)wherein R is CF3CF2 (CF2CF2)n wherein n≧2 and wherein X is a halide selected from the group consisting of Cl Br and I, a hydroxyl group, a carboxyl group, an acrylate, a methacrylate, a sulfonic acid or a derivative thereof.
8. The composition according to claim 1, wherein the fluorinated additive of the general formula (II)
CF3CF2CF2—O—[CF(CF3)—CF2—O]n—CF2CF3 wherein n≧2.
9. The composition according to claim 7 wherein the fluorinated additive is functionalized with a hydroxyl group, a carboxyl group, an acrylate, a meth-acrylate, a sulfonic acid phosphate, a silane, an ammonium salt or a derivative thereof.
10. The composition according to claim 8, wherein the fluorinated additive is functionalized with a hydroxyl group, a carboxyl group, an acrylate, a meth acrylate, a sulfonic acid phosphate, a silane, an ammonium salt or a derivative thereof.
11. The rubber composition according to claim 1, further comprising a crosslinking agent.
12. The rubber composition according to claim 11, wherein the crosslinking agent is a peroxide.
13. The rubber composition according to claim 11 wherein the crosslinking agent is an additive capable of forming a derivative of a carboxyl functionality.
14. The rubber composition according to claim 1, further comprising at least one filler.
15. The rubber composition according to claim 1, further comprising antioxidants, anti-aging agents, heat stabilizers, processing aids, plasticizers, foaming agents, reaction accelerators and/or activators, or vulcanizing accelerators.
16. A process for improving the physical and low temperature properties of an elastomer composition comprising mixing a carboxylated rubber and a fluorinated additive.
17. A process for improving the tear strength, abrasion resistance, and compression set of an elastomer composition comprising mixing a carboxylated rubber and a fluorinated additive.
18. A process for preparing an elastomeric composition comprising admixing a carboxylated rubber and from 0.1 to 1 parts per hundred parts rubber of a fluorinated additive.
19. The process according to claim 18, wherein the carboxylated rubber is selected from the group consisting of XSBR, XNBR, HXNBR, FKM, ACM and EAM and blends thereof.
20. The process according to claim 19, wherein carboxylated rubber is XNBR.
21. The process according to claim 20, wherein the carboxylated rubber is HXNBR.
Patent Application
20070197702
