Composition and use of hydrogenated alkyl ketene dimers
AssigneeHercules Incorporated
InventorClement L. Brungardt
Life of this patent
Estimating the term…
Abstract
Latent dispersants were made by the hydrogenation of an alkyl ketene dimer, alkenyl ketene dimer, or ketene multimer. Adding the latent dispersant to paper or paperboard increased its resistance to water and water vapor while maintaining recyclability and repulpability. Additionally, provided is a method for increasing the repulpability of a wax coated paper or paperboard. Dispersants made by the hydrolysis of the alkyl ketene dimer, alkenyl ketene dimer, and ketene multimer are also described.
Claims20
A composition comprising Formula I:
- wherein
- R is a branched or straight chain alkyl that is at least 6-carbon atoms in length;
- R1 is a branched or straight chain alkyl containing from 2 to 34 carbon atoms;
- R2 is a branched or straight chain alkyl that is at least 6-carbon atoms in length;
- wherein
- R, R1 and R2 may independently, optionally contain a cyclic functional group;
- and
- n is an integer from 0 to 6.
A method of making a paper and paperboard comprising:
- a) providing a composition according to a composition comprising Formula I:
- wherein
- R is a branched or straight chain alkyl that is at least 6-carbon atoms in length;
- R1 is a branched or straight chain alkyl containing from 2 to 34 carbon atoms;
- R2 is a branched or straight chain alkyl that is at least 6-carbon atoms in length;
- wherein
- R, R1 and R2 may independently, optionally contain a cyclic functional group;
- and
- n is an integer from 0 to 6;
- b) contacting the composition of a) with a pulp material;
- c) forming a paper or paperboard;
- and
- d) optionally, applying the composition of Formula I to the surface of the paper or paperboard.
A method for increasing the repulpability of a paper or paperboard comprising:
- providing a paper or paperboard;
- applying to the surface of the paper or paperboard a composition comprising Formula I:
- wherein
- R is a branched or straight chain alkyl that is at least 6-carbon atoms in length;
- R1 is a branched or straight chain alkyl containing from 2 to 34 carbon atoms;
- R2 is a branched or straight chain alkyl that is at least 6-carbon atoms in length;
- Wherein
- R, R1 and R2 may independently, optionally contain a cyclic functional group;
- and n is an integer from 0 to 6;
- and
- repulping the paper or paperboard.
Dependencies are inferred from the claim text.