Coating compositions comprising alkyl ketene dimers and alkyl succinic anhydrides for use in paper making
AssigneeSpectra-Kote Corporation
InventorsCharles W. Propst, JR., James C. Jones
Life of this patent
Estimating the term…
Abstract
Additives for paper making are disclosed herein. Specifically, the additives are wax-free alternatives to conventional coatings, including ASA, AKD and optionally an acrylic containing composition. Other additives may be included in the coating, such as cationic particles or compositions. The coatings may be used at a variety of points during the paper making process, including on the calender stack and in the wet end.
Claims22
-19. (canceled)
A process for making paper comprising the following steps:
- (A) applying a furnish to a wire;
- (B) dewatering the furnish and obtaining a water containing paper;
- (C) pressing the water containing paper to reduce the water content;
- (D) calendering the pressed paper;
- (E) recovering a finished paper;
- and (F) adding a coating, comprising an effective amount of at least one member selected from the group consisting of alkyl ketene dimer (AKD) and alkyl succinic anhydride (ASA) and optionally an acrylic acid containing composition.
A composition comprising:
- at least one member selected from the group consisting of alkyl ketene dimer and alkylene succinic anhydride;
- an acrylic acid containing composition;
- and optionally wood fibers.
A process of making a coated paper or kraft stock comprising the steps of:
- providing a paper or kraft stock;
- applying an aqueous resin coating composition as a coating to said paper or stock in an amount in excess of the desired amount of coating;
- said aqueous coating composition comprising at least one member selected from the group consisting of alkyl ketene dimer (AKD) and alkyl succinic anhydride (ASA) and optionally an acrylic acid containing composition;
- metering and removing unwanted coating material from said paper or stock coated with said excess amount of coating material by directing a flow of fluid against said coating;
- solidifying the coating on said paper or stock;
- and obtaining a coated paper or kraft stock.
-40. (canceled)
Dependencies are inferred from the claim text.