| 摘要 |
<p>A method for the devulcanisation of a rubber material, comprising contacting the rubber material with carbon dioxide and an additive selected from dithiocarbamates, thiazoles, guanidines, thiurams, sulphenamides and mixtures thereof. The additive may be used in an amount from 1-10 parts by weight per 100 parts of rubber. The rubber may additionally be contacted with one more co-agents selected from fatty acids and salts thereof and metal oxides. Carbon dioxide may be present in an amount from 0.5-10 % by weight of the rubber material. A devulcanised rubber made by the process is also claimed. At least one of elongation, tensile strength, abrasion resistance, compression set, tear strength/tear resistance, hardness or resilience of the devulcanised rubber may be 50% of that of virgin rubber of the same grade.</p> |
