Paper coatings containing guar or reduced molecular weight guar
AssigneeHercules Incorporated
InventorsMichael J. Brown, Teng-Shau Young
Life of this patent
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Abstract
This invention relates to paper coating compositions comprising pigment, adhesive binder and rheology modifier wherein the rheology modifier comprises at least one of a) a mixture of guar and at least one other water-soluble polymer in sufficient amount to reduce the amount of guar adsorbed onto the pigment, or b) reduced molecular weight guar. The invention also relates to processes for making coated paper using the coating compositions, and to paper coated with the coating compositions.
Claims29
A paper coating composition comprising pigment, adhesive binder and rheology modifier wherein the rheology modifier comprises guar and at least one other water-soluble polymer selected from the group consisting of cellulose ethers, natural and modified starches, xanthan and mixtures thereof.
A paper coating composition comprising pigment, adhesive binder and rheology modifier comprising reduced molecular weight guar.
A paper coating composition comprising pigment, adhesive binder and rheology modifier wherein the rheology modifier comprises guar and at least one synthetic water-soluble polymer.
Dependencies are inferred from the claim text.