Printing sheet and manufacturing method therefor

A printing sheet for use in a thermal transfer system including a support having a dye receiving layer disposed thereon, said dye receiving layer consisting essentially of:

• (A) a film forming resin selected from the group consisting of:
• thermoplastic resins, thermosetting resins, ultraviolet setting resins, electron setting resins and mixtures of any of the foregoing resins;
• (B) from about 0.5 to about 30 parts by weight per 100 parts by weight of said film forming resin component (A) of a previously prepared isocyanate group-containing polymer produced by reaction of:
• (a) a multifunctional polyisocyanate with
• (b) a co-reactant selected from
• (i) a combination of a carboxy-terminated polysiloxane and a diamine;
• (ii) a combination of a hydroxy-terminated polysiloxane and a diamine;
• or
• (iii) a combination of a carboxy-terminated polysiloxane and water,
• said isocyanate group-containing polymer having a molecular weight of from about 3,000 to about 15,000;
• and
• (C) optionally including an additive selected from the group consisting of:
• dye dispersing agents, fluorescent whitening agents, white pigments, antistatic agents, plasticizers, UV absorbers and antioxidants.