Title:
COBALT BEARING POLYMERIC COMPOSITIONS
Document Type and Number:
WIPO Patent Application WO/2010/028851
Kind Code:
A3
Abstract:
The invention relates to polymeric cobalt bearing compounds, in particular for use as metal-rubber adhesion promoters (RAPs) in tires, belts and hoses. Known active substances are a.o. cobalt stearates, naphthenates, resinates, decanoates, boro-decanoates and many other forms of acylates. While these substances appear to enhance the metal-rubber adhesion, all of them also come with significant drawbacks, a.o. linked to the relatively high bioavailability of cobalt in these substances. The invention concerns more particularly a polymer comprising Co-carboxylate sequences, with a Co content of at least 3% by weight, and with a mean molecular weight of more than 2000. Several synthesis methods, allowing to reach relatively high Co concentrations in the polymer, illustrate the invention. The invented polymers show a strongly reduced bioavailability of Co compared to currently available products, as demonstrated by aqueous leaching tests. As RAPs, they perform similarly to commercial products, as shown by pullout tests.
Inventors:
CLAUWAERT EDDY (BE)
KAMPHUIS BERT-JAN (BE)
KAMPHUIS BERT-JAN (BE)
Application Number:
PCT/EP2009/006631
Publication Date:
June 10, 2010
Filing Date:
September 14, 2009
Export Citation:
Assignee:
UMICORE NV (BE)
CLAUWAERT EDDY (BE)
KAMPHUIS BERT-JAN (BE)
CLAUWAERT EDDY (BE)
KAMPHUIS BERT-JAN (BE)
International Classes:
C08L85/00; C08G79/00; C08G83/00; C08J5/10; C08K5/098; C08K5/55; C08L21/00
Domestic Patent References:
| WO2002028944A1 | 2002-04-11 |
Foreign References:
| GB1393005A | 1975-05-07 | |||
| GB1232194A | 1971-05-19 | |||
| EP0059883A1 | 1982-09-15 | |||
| GB972804A | 1964-10-14 |
Attorney, Agent or Firm:
PILATE, André (Patent DepartmentKasteelstraat 7, Olen, BE)
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