Patent ID: 6224526
Filing Date: 2001-05-01
Classification: B41N

Abstract:
A printing roller comprising:a) a cylindrical substrate;b) a foam base coat having a degree of compressibility of less than about 2% on press during printing, said foam base coat is interposed between said cylindrical substrate and a top coat, andc) a top coat comprising a 2-component polyurethane resin having from about 15% to about 70% by weight of solid particles dispersed therein and a Shore D hardness of at least about 40 at room temperature,wherein said 2-component polyurethane comprises:a) component A comprising:I) from about 20% to about 80% by weight of at least one polyol;ii) about 1% to about 20% by weight of at least one low molecular weight crosslinking agent having isocyanate reactive groups;iii) about 0.1% to about 1.5% by weight of water; andiv) up to about 50% by weight of at least one filler; andb) component B comprising a liquid isocyanate hardener having a functionality of at least 2;wherein the mixing ratio of said component A to said component B ranges from about 0.8/1 to about 1.2/1.