Abstract: A primer useful in the preparation of an anti-fouling surface contains (I) a copolymer formed from acrylates, free carboxyl group containing monomer and an aromatic sulfonic acid or salt, an acrylic polymeric resin and a cross-linking agent.

Abstract: A primer useful in the preparation of an anti fouling surface contains (I) a copolymer formed from acrylates, free carboxyl group containing monomer and an aromatic sulfonic acid or salt, an acrylic polymeric resin and a cross-linking agent.

Abstract: A liquid crystal display device including two electrically insulating substrates, electrodes on the inner surfaces of the substrates, a film of liquid crystal material contained between the electrodes and a resinous material as sealant and/or encapsulant and/or inner structural component characterised in that the resinous material is the product of light-curing a light-curable resin composition comprising at least one compound having two or more non-aromatic carbon-carbon unsaturated bonds per molecule, at least one compound having two or more mercapto groups per molecule and a photoinitiator.

Abstract: New tetraarylboron-ammonium complexes having the general formula: ##STR1## wherein R.sub.1 represents a hydrogen or a halogen atom or a lower alkyl group; R.sub.2 represents a halogen atom or a lower alkyl or a lower alkenyl group; and R.sub.3 represents a heterocyclic amine are provided as active ingredient of anti-fouling paint and also of antiseptic, antifungal agent. These compounds exhibit remarkably long-lasting anti-fouling activities against substantially all kinds of aquatic organisms including slimes with acceptably low toxicity against human beings and also exhibit high antimicrobial activities against various fungi, bacteria and yeasts.