Henkel Ag & Company, Kgaa

Henkel IP Holding Gmbh

Brian Deegan

Brendan J Kneafsey

Andrew D Messana

Darren Nolan

Mark M Konarski

Mark Loane

Lynnette M Hurlburt

James Houlihan

Nigel Sweeney

David Condron

Gavin Haberlin

Stephen Fearon

Patrick O'Dwyer

Jim Houlihan

Nicholas Penrose

Marc Hamm

Marc Galligan

Vincent O'BRIEN

A method of activating a surface of a plastics substrate formed from: for subsequent bonding, the method comprising the step of exposing the surface to actinic radiation wherein the actinic radiation: includes radiation with wavelength in the range from about 10 nm to about 1000 nm; the energy of the actinic radiation to which the surface is exposed is in the range from about 0.5 J/cmto about 300 J/cm. Hard to bond substrates are then more easily subsequently bonded for example using acrylic, epoxy or anaerobic adhesive.

Activating surfaces for subsequent bonding

A method of activating a surface of a plastics substrate formed from: Hard to bond substrates are then more easily subsequently bonded for example using acrylic, epoxy or anaerobic adhesive.

A curable primer composition comprising:(a) a curable component such as methacrylate; (b) a cure initiating component; and (c) a polymer material selected from the group consisting of: (i) block polymers represented by S-A-S where S is polystyrene and A stands for a polymer or copolymer formed from one or more of ethylene, propylene, butylene, and styrene, which are optionally substituted with carboxylic acid or maleic anhydride; provided that when A comprises styrene then A is a copolymer of styrene with at least one of ethylene, propylene and butylene, and is optionally substituted with carboxylic acid or maleic anhydride; and (ii) polystyrene-poly(ethylene-propylene) ('SEP'); and (iii) any combination of said polymer materials. The composition is applied to a part then photocured. It is dry to touch. Thereafter a thermoplastic material such as a polyolefin is overmolded (e.g. injection molded) over the applied composition. It enhances bond strength of the polyolefin to the part.

Primer compositions for injection molding

Curable compositions, such as by way of exposure to radiation in the electromagnetic spectrum, for use as a primer composition for injection molding applications, are provided.

A bonding system for bonding a plastic substrate to another substrate, the bonding system comprising a plastic substrate wherein the plastic substrate is impregnated with a transition metal; and an anaerobically curable composition. Cure of the anaerobically curable composition is initiatable by the transition metal when the anaerobically curable composition is contacted with the plastic substrate under anaerobic conditions.

Cure of anaerobic compositions

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Dublin, Ireland

Brian Deegan