Thermosetting printing ink composition.

摘要

A thermosetting printing ink compsn. comprises: (a) a copolymer of a thermosettable polyester and a polysiloxane comprising a hydrogen-terminated polyalkylene oxide-modified polymethylsiloxane of number average mol.wt. 3,000-5,000 an formula (I); (CH3)3SiO[(CH3)2SiO]x[CH3-Si(PE)O]ySi(CH3)3 (I) PE = -CH2CH2CH2O(EO)m(PO)n(BO)qH; EO = ethylenoxy; PO= propyleneoxy; BO= butyleneoxy; m, n, q = 0-10, provided that m+n+q = 1 or more; x = 0-250; and y = 1-500; the copolymer contains 1.9-5 wt.% polysiloxane; (b) a pigment; (c) a crosslinking agent; and (d) a curing catalyst comprising a strong acid or its metal salt.