Elastomeric product having a radical cross-linked rubber mixture
The invention relates to an elastomeric product which contains a radical cross-linked rubber mixture, especially drive belts. For the production of elastomeric products, especially drive belts, having a long service life and producible in an environmentally friendly way, the rubber mixture contains (a) 0.1 to 50 phr of at least one carboxylic acid, which is at least α,β unsaturated and γ,δ unsaturated and preferably has at least one allylic hydrogen atom; and, (b) 0.1 to 50 phr of at least one salt-former as co-activator.
1. A drive belt which contains a radical cross-linked rubber mixture, wherein the rubber mixture comprises:
(a) 0.1 to 50 phr (parts by weight, based on 100 parts by weight of all rubbers in the mixture) of at least one carboxyl group-containing carboxylic acid, which is at least α, β unsaturated and γ,δ unsaturated; and,
(b) as co-activator, 0.1 to 50 phr of at least one salt-former, a metal-containing compound reactive with such carboxyl groups to form salt bridges therebetween,
wherein the rubber mixture contains at least one of an ethylene-propylene-diene rubber (EPDM), ethylene-propylene rubber (EPM) or hydrogenated nitrile rubber.
2. The drive belt of claim 1 , wherein the rubber mixture contains 10 to 40 phr of said at least one carboxylic acid.
3. The drive belt of claim 1 , wherein said at least one carboxylic acid includes at least one allylic hydrogen.
4. The drive belt of claim 1 , wherein said at least one carboxylic acid is a 2,4-hexadiene acid.
5. The drive belt of claim 1 , wherein said at least one carboxylic acid is sorbic acid.
6. The drive belt of claim 1 , wherein the rubber mixture contains 5 to 40 phr of said at least one salt-former.
7. The drive belt of claim 6 , wherein said at least one salt-former is a metal oxide or a metal carbonate.
8. The drive belt of claim 1 , wherein said at least one salt-former is a zinc compound.
9. The drive belt of claim 1 , wherein said at least one salt-former is zinc oxide.
10. The drive belt of claim 1 , wherein the rubber mixture contains ethylene-propylene-diene rubber (EPDM).
11. The drive belt of claim 1 , wherein the rubber mixture contains ethylene-propylene rubber (EPM).
12. The drive belt of claim 1 , wherein the rubber mixture contains hydrogenated nitrile rubber.
13. The drive belt of claim 1 , wherein the drive belt is a friction-tight drive belt.
14. The drive belt of claim 13 , wherein the drive belt is a V-ribbed belt.
15. The drive belt of claim 14 , wherein the radical cross-linked rubber mixture forms the ribs of the V-ribbed belt.
16. The drive belt of claim 14 , wherein the radical cross-linked rubber mixture forms the back of the V-ribbed belt.
17. The drive belt of claim 14 , wherein the radical cross-linked rubber mixture forms the cord embedding mixture or a rubberizing mixture of the V-ribbed belt.
18. The drive belt of claim 1 , wherein the drive belt is a form-tight drive belt.
19. The drive belt of claim 18 , wherein the drive belt is a toothed belt.
20. The drive-belt of claim 19 , wherein the radical cross-linked rubber mixture forms the cover layer and the base body comprising the teeth.
21. A drive belt which contains a radical cross-linked rubber mixture, wherein the rubber mixture comprises:
(a) 0.1 to 50 phr (parts by weight, based on 100 parts by weight of all rubbers in the mixture) of at least one carboxyl group-containing 2,4-hexadiene acid; and,
(b) as co-activator, 0.1 to 50 phr of at least one salt-former, a zinc-containing compound reactive with such carboxyl groups to form salt bridges therebetween,
wherein the rubber mixture contains at least one of an ethylene-propylene-diene rubber (EPDM), ethylene-propylene rubber (EPM) or hydrogenated nitrile rubber.