Adhesive composition and method
AssigneeUSM Corporation
InventorsGerhardt Piestert, Heinz G. Gilch
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Abstract
Adhesive composition based on acrylate monomers and a peroxide, together with selected halogenated aliphatic acids, which is storage stable and can be used as an anaerobic adhesive composition and a method of bonding by use of that adhesive to quickly form adhesive bonds to steel, copper, zinc and brass without use of a primer, which bonds do not lead to significant corrosion of the metals.
Claims21
A method of bonding metal surfaces by use of an anaerobic adhesive composition consisting essentially of a polymerizable acrylic monomer, an organic peroxide selected from the group consisting of benzoyl peroxide;
- 2,5 dimethyl-2,5di(t-butylperoxy)hexane;
- 1,1 di-t-butylperoxy-3,3,5-trimethylcyclohexane;
- dilauryl peroxide and mixtures of these and an acidic substance characterized in that the acidic substance is a halogenated aliphatic monocarboxylic acid according to the general formula ##STR10## in which (i) each of X, Y and Z is Cl or Br or
- (ii) Z is H or R (where R is a methyl or ethyl group), and each of X and Y is Cl or Br or
- (iii) each of Y and Z is H or R and X is Cl.
A method of bonding metal surfaces by use of an anaerobic adhesive composition consisting essentially of a polymerizable acrylic monomer, an organic peroxide which is 2,5 dimethyl-2,5-di(t-butylperoxy)hexane and an acidic substance characterized in that the acidic substance is a halogenated aliphatic monocarboxylic acid according to the general formula ##STR11## in which (i) each of X, Y and Z is Cl or Br or
- (ii) z is H or R (where R is a methyl or ethyl group), and each of X and Y is Cl or Br or
- (iii) each of Y and Z is H or R and X is Cl, and in that the adhesive composition is applied to a clean metal surface which has not been treated with a substituted thiourea primer.
An anaerobic adhesive composition consisting essentially of a polymerizable acrylate monomer, an organic peroxide selected from the group consisting of benzoyl peroxide;
- 2,5-dimethyl-2,5-di-(t-butylperoxy)hexane;
- 1,1-di-t-butylperoxy-3,3,5-trimethylcyclohexane;
- dilaurylperoxide and mixtures of these and an acidic substance characterized in that the acidic substance is a halogenated aliphatic monocarboxylic acid according to the general formula ##STR12## in which (i) each of X, Y and Z is Cl or Br or
- (ii) Z is H or R (where R is a methyl or ethyl group), and each of X and Y is Cl or Br or
- (iii) each of Y and Z is H or R and X is Cl.
An anaerobic adhesive composition consisting essentially of a polymerizable acrylate monomer of the general formula ##STR13## and n is 0 or 1, x is an integer from 1 to 8 and y is an integer from 1 to 20, a peroxide which is 2,5 dimethyl-2,5-di(t-butylperoxy)hexane and an acidic substance selected from the group consisting of trichloroacetic acid, dichloroacetic acid, or tribromoacetic acid.
Dependencies are inferred from the claim text.