Processes for making temporary wet strength additives
AssigneeThe Procter & Gamble Company
InventorsRobert Lee Barcus, Khosrow Parviz Mohammadi
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Abstract
Processes for making temporary wet strength additives, more particularly, processes for oxidizing a homo-crosslinking monomeric unit present in a polymer comprising the homo-crosslinking monomeric unit and a cationic monomeric unit to produce a temporary wet strength additive are provided.
Claims17
A method for making a temporary wet strength additive comprising the step of oxidizing a reversible, homo-crosslinking monomeric unit present in a polymer comprising the reversible, homo-crosslinking monomeric unit and a cationic monomeric unit such that a temporary wet strength additive is produced wherein the reversible, homo-crosslinking monomeric unit is derived from a monomer having the following structure:
- wherein Y3 is —H, —CH3, or a halogen;
- and Z is a nucleophilic moiety capable of forming an unstable covalent bond with an electrophilic moiety.
A method for making a temporary wet strength additive comprising the steps of:
- a) providing a reversible, homo-crosslinking monomeric unit;
- b) providing a cationic monomeric unit;
- c) polymerizing the monomeric units from a) and b) above to produce a polymer comprising a reversible, homo-crosslinking monomeric unit and a cationic monomeric unit;
- d) oxidizing a portion of the reversible, homo-crosslinking monomeric units to provide a temporary wet strength additive wherein the method further comprises the step of providing a non-nucleophilic monomeric unit such that the non-nucleophilic monomeric unit is polymerized along with the monomeric units from a) and b) to produce a polymer comprising a reversible, homo-crosslinking monomeric unit, a cationic monomeric unit and a non-nucleophilic monomeric unit.
Dependencies are inferred from the claim text.