초록 ▼

The present invention resides broadly in a method for the preparation of paper having improved water and/or solvent resistance which comprises applying to a base paper a plastic particle containing formulation, and then wetting the formed coating with a solvent to which the plastic particles are sen

The present invention resides broadly in a method for the preparation of paper having improved water and/or solvent resistance which comprises applying to a base paper a plastic particle containing formulation, and then wetting the formed coating with a solvent to which the plastic particles are sensitive. The present invention is particularly applicable to the preparation of electrostatic paper masters of improved water resistance for lithographic printing having a photoconductive layer and a barrier coat to which the photoconductive layer is applied. The barrier coat contains a binding amount of a binder resin and filler at least a portion of which is an amount of said plastic particles sensitive to the solvent system of the photoconductive layer, the amount of plastic particles and sensitivity being sufficient to materially increase water resistance. The present invention is particularly directed to a novel water and/or solvent resistant coated paper product wherein the coating comprises a binder and filler, a sufficient amount of the filler comprising plastic particles in a coalesced state to provide a thin, substantially continuous plastic film, the binder being hydrophobic.

대표청구항 ▼

A coated paper having improved solvent and water resistance comprising (a) a paper base; and (b) a formed coating on said paper base comprising a binding amount of a natural or synthetic hydrophobic binder and a filler at least a portion of which is an amount of plastic particles soluble in a solven

A coated paper having improved solvent and water resistance comprising (a) a paper base; and (b) a formed coating on said paper base comprising a binding amount of a natural or synthetic hydrophobic binder and a filler at least a portion of which is an amount of plastic particles soluble in a solvent, said binding amount being at least about 10% based on the weight of filler, the plastic particles being present in sufficient amount and in a coalesced state in said coating to provide a substantially continuous plastic particle film; (c) the coat weight being about 0.5-15 lbs./side/3,300 sq. ft. applied to at least one side; (d) said particles having the property of being non-coalescible at ambient temperature and under the conditions of drying and finishing of the coated paper, (e) said coating being free of materials which would adversely affect solvent and water resistance.