| 摘要 |
<p>1534767 Heat-curable laminates NITTO ELECTRIC INDUSTRIAL CO Ltd 4 Feb 1976 [27 March 1975 16 April 1975] 04287/76 Heading B5N A heat-curable multi layer composite sheet comprises a layer comprising at least one unsaturated compound which is free-radical reactive and which is solid or liquid at room temperature and a layer comprising a free radical initiator which is solid or liquid at room temperature, the layers being bonded to each other as separate layers at a temperature at which the free-radical initiator does not lose its freeradical reaction initiating capability. The unsaturated compounds may be unsaturated polymers which may be in admixture with unsaturated monomers. The composite sheet may comprise an unsaturated compound layer and an initiator layer, an initiator layer sandwiched between two unsaturated compound layers or an unsaturated compound layer sandwiched between two initiator layers. The unsaturated compound may comprise an acrylic polymer or unsaturated polyester and the initiator may be a peroxide, azo compound, potassium persulphate or ammonium persulphate. A non- reactive polymer may be added to the unsaturated compound or initiator as carrier. The unsaturated compound layer may also contain a pigment or anticorrosive filler. The unsaturated compound layer or initiator layer preferably includes a fabric, foam or paper sheet. The unsaturated compound and initiator may be applied to separate strippable sheets which are removed after bonding the layers together. The composite sheet may be used to bond single sheets to each other or to a honeycomb structure or to bond an overlay, pattern or barrier paper to a base sheet. It may also be used in the production of skis or as a surface layer on wooden, plastics or metal surface.</p> |
