Metal surface treatment
AssigneeSpecialty Operations France
InventorsGuillaume Gody, Marie-Pierre Labeau
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Abstract
The instant invention concerns the use of at least one polymer P obtained by radical copolymerization of a mixture of (i) acrylic acid; (ii) methacrylic acid; and (iii) at least one 2-hydroxyethyl methacrylate phosphate for treating a metallic surface intended to be adhesive-bonded to another surface, in order to impart a resistance to the adhesive failure to the resulting bonding.
Claims15
A method of treating a first metallic surface (S1) intended to be bonded to a second surface (S2) by adhesive bonding, and for imparting a resistance to the adhesive failure to the bonding, comprising treating a metallic surface (S1) with at least one polymer P obtained by radical copolymerization of a mixture of (i) acrylic acid;
- (ii) methacrylic acid;
- and (iii) at least one 2-hydroxyethyl methacrylate phosphate of Formula (a) below:
- wherein n is 1 or 2;
- wherein the mixture has the following molar ratio, based on the total quantity of acrylic acid, methacrylic acid and 2-hydroxyethyl methacrylate phosphates of formula (a):
- acrylic acid:
- from 65 to 90%,
- methacrylic acid:
- 5 to 30%,
- 2-hydroxyethyl methacrylate phosphates:
- 2 to 12%;
- and
- wherein the second surface (S2) is a metallic surface.
A process for bonding a first metallic surface (S1) with a second metallic surface (S2) including:
- treating said first surface (S1) with at least one composition including at least one polymer P obtained by radical copolymerization of a mixture of (i) acrylic acid;
- (ii) methacrylic acid;
- and (iii) at least one 2-hydroxyethyl methacrylate phosphate of Formula (a) below:
- wherein n is 1 or 2;
- wherein the mixture has the following molar ratio, based on the total quantity of acrylic acid, methacrylic acid and 2-hydroxyethyl methacrylate phosphates of formula (a):
- acrylic acid:
- from 65 to 90%,
- methacrylic acid:
- 5 to 30%,
- 2-hydroxyethyl methacrylate phosphates:
- 2 to 12%;
- and
- optionally treating the second metallic surface (S2) with at least one composition including the at least one polymer P;
- and
- bonding the surfaces (S1) and (S2) via an adhesive composition applied between the two surfaces.
A material comprising two adhesive-bonded surfaces including a first metal surface comprising a metal surface (S1) which is in all or part (i) treated with a polymer P and (ii) bonded to a second metallic surface (S2), via an adhesive, said material being a material having a metal surface (S1) in all or part covered by:
- at least one coating comprising the at least one polymer P;
- and/or
- a layer comprising a reaction product of the polymer P with a metal of the treated surface or another compound present in said layer, or the polymer P strongly linked with said other compound,
- wherein polymer P is obtained by radical copolymerization of a mixture of (i) acrylic acid;
- (ii) methacrylic acid;
- and (iii) at least one 2-hydroxyethyl methacrylate phosphate of Formula (a) below:
- wherein n is 1 or 2;
- wherein the mixture has the following molar ratio, based on the total quantity of acrylic acid, methacrylic acid and 2-hydroxyethyl methacrylate phosphates of formula (a):
- acrylic acid:
- from 65 to 90%,
- methacrylic acid:
- 5 to 30%,
- 2-hydroxyethyl methacrylate phosphates:
- 2 to 12%.
Dependencies are inferred from the claim text.