Pergopak HP Polymethyl urea resin 9011-05-6 Albemarle-Martinswerk Surface conditioner, miscellaneous >> Matting agent Coatings Coil Coating Pigment concentrates Other industry >> Paper coatings Polymethyl urea resin with approx. 0.6 % reactive methylol group. PERGOPAK, as a synthetic white pigment, is used for the production of both paper and board to improve paper opacity, and in the paint and varnish industry as a matting additive. . Polymethyl urea resin with approx. 0.6 % reactive methylol group. Synthetic white pigment, used for the production of both paper and board to improve paper opacity, and in the paint and varnish industry as a matting additive.