Polyurea that is particularly useful as an adhesion primer for adhering metal to rubber
AssigneesCompagnie Generale Des Establissements Michelin, Michelin Recherche et Technique S.A.
InventorsMilan Fedurco, Marco Ribezzo, Antonio Delfino
Life of this patent
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Abstract
A polyurea comprises at least urea base units of formula —NH—CO—NH— and additional units. The additional units comprise at least, on the one hand, a secondary alcohol functional group and, on the other hand, an ether, thioether or secondary amine functional group in the alpha position with respect to the secondary alcohol functional group. Such a polymer can be used as an adhesion primer for the adhesive bonding of a substrate, for example, glass or metal, to an unsaturated rubber or as corrosion-resistant protective coating for a metal substrate. Metal reinforcers, such as thread, cord, film or plate, coated can also be coated with such a polymer.
Claims26
A polyurea comprising at least urea base units of formula —NH—CO—NH— and additional units,
- wherein the additional units are units of the sulfur-comprising polyaromatic polyamine type comprising at least one sub-unit corresponding to the formula:
- —HN—Ar1—NH—CH2—CH(OH)—(CH2)m—O—Z1—O—(CH2)m—CH(OH)—CH2—[X]n—HN—Ar2—NH— (I)
- wherein X represents the string:
- —HN—Ar3—NH—CH2—CH(OH)—(CH2)m—O—Z2—O—(CH2)m—CH(OH)—CH2—;
- wherein n represents an integer equal to zero or different from zero;
- wherein m, which are identical or different, represent an integer within a range from 1 to 10;
- wherein Z1 and Z2 represent cyclohexane-1,4-dimethylene;
- and
- wherein Ar1 Ar2 and Ar3, which are identical or different, each represent a phenylene group, at least one of these phenylene groups bearing one, two, three or four groups of formula —SX—R in which x is an integer from 1 to 8 and R represents hydrogen or a hydrocarbon group which optionally comprises a heteroatom and which comprises from 1 to 10 carbon atoms.
Dependencies are inferred from the claim text.