Protecting metal substrate from corrosion

Details Protecting metal substrate from corrosion Protecting metal substrate from corrosion

C - Chemistry, Metallurgy

09

J

154/141, 117/160

C09J 7/02 (2006.01) B32B 7/00 (2006.01) B32B 7/12 (2006.01) B32B 15/08 (2006.01) B32B 27/04 (2006.01) C09J 5/06 (2006.01) C23F 13/00 (2006.01) F16H 25/24 (2006.01)

Patent

CA 1179210

ABSTRACT OF THE DISCLOSURE A dimensionally recoverable article has on at least part of a surface thereof, an adhesive composition compris- ing an adhesive component and an effective amount of an agent for reducing cathodic disbonding which comprises a hydrazine derivative of the general formula I Image I Wherein n is 0 or 1; A represents a straight-chain or branched alkyl radical, an, aryl, aralkyl, or hydrazido radical or a radical of the general formula II. Image II in which m is 0 or an integer of up to 20; Y represents a straight-chain or branched alkyl group, an aryl or heterocyclic group; and Z represents a straight-chain or branched alkyl group, an aryl or heterocyclic group; any of the radicals A being unsubstituted or sub- stituted by one or more lower alkyl or hydroxyl groups or halogen atoms; and When n is 1, B represents a straight-chain or branched alkyl radical, an aryl or aralkyl radical or a radical of the general formula II as defined above; and When n is 0, B represents a radical of the general formula III -CH-(CH2)g-W III wherein q is 0 or an integer of from 1 to 20, and W represents a straight-chain or branched alkyl group, or an aryl or heterocyclic group, each of which may be unsubstituted or substituted by one or more lower alkyl or hydroxyl groups or halogen atoms. The hydrazine derivative improves the properties of the adhesive, and particularly its resistance to disbonding from substrates.

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