Abstract:
THE INVENTION PROVIDES NOVEL A-METHYLOL-BENZOIN-SULPHONIC ACID ESTERS WHICH MAY BE MANUFACTURED BY REACTINGG EQUIVALENT AMOUNTS OF AN A-HYDROXY-METHYLBENZOIN AND A SULPHONIC ACID ESTER CHLORIDE IN THE PRESENCE OF A HYDROGEN CHLORIDE BINDING AGENT. THE NOVEL COMPOUNDS DECOMPOSE ON IRRADIATION WITH UV LIGHT UNDER LIBERATION OF THE CORRESPONDING SULPHONIC ACID. THEREFORE, THEY ARE SUITABLE FOR USE AS CIRING CATALYSTS WHICH CAN BE ACTIVATED BY UV-RAYS FOR ACID-CURABLE RESINS OR RESIN COMPOSITIONS.
Abstract:
The invention relates to a process of forming a continuous coating on an article by spraying a pulverulent mixture of a polymer containing hydroxy groups having a softening point of at least 40*C and of a masked polyisocyanate through an electric field on an article to adhere the said mixture to said article and baking said mixture to fuse it into a continuous coating the improvement which comprises using as a masked polyisocyanate a Epsilon -caprolactam masked polyisocyanate.
Abstract:
The invention relates to new varnish binders for coating materials and to a process of forming a continuous coating on an article by spraying a pulverulent coating material preferably having a softening point of 40*C, comprising those varnish binders of the present invention being pulverulent and having a softening point of at least 40*C, optionally in mixtures with additives, through an electric field on an article to adhere the said pulverulent coating material to said article and baking said coating material to fuse it into a continuous coating.