Chemical softening compositions for paper products
AssigneeHuntsman Petrochemical Corporation
InventorDuy T. Nguyen
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Abstract
A chemical softening composition includes a amide-substituted quaternary imidazolinium salt, a nonionic surfactant, and a polyhydroxy compound for use in treating cellulosic materials including papers, textiles and fabrics. The chemical softening composition can be applied to papermaking fibers during a papermaking process to provide a softened paper web and product possessed of sufficient tensile strength for its regular employment. A chemical softening composition according to the invention can also be applied to fabric to soften the fabric, provide easier handling of the fabric, and also reduce the tendency of the fabric to generate and store static electricity.
Claims35
1) An aqueous composition useful for softening a cellulosic material comprising:
- a) any amount between 0.25% and 20.00% by weight based upon the total weight of said composition of an amide-substituted quaternary imidazolinium salt;
- b) a nonionic surfactant;
- and
- c) a polyhydroxy compound having an average molecular weight which is any molecular weight in the range of 200 to 4000,
- wherein the amide-substituted quaternary imidazolinium salt comprises a cation having the structure:
- 5
- in which R1 in each occurrence is independently selected from the group consisting of:
- hydrogen or a hydrocarbyl group comprising any number of carbon atoms between 8 and 22 and wherein R2 is selected from the group consisting of:
- hydrogen, or any C1 to C12 hydrocarbyl group, including mixtures of cations meeting this description.
12) An aqueous composition useful for softening cellulosic material comprising:
- a) 0.25% to 20.00% by weight of a amide-substituted quaternary imidazolinium salt which comprises a cation having the structure:
- 6
- in which R1 in each occurrence is independently selected from the group consisting of:
- hydrogen or a hydrocarbyl group comprising any number of carbon atoms between 8 and 22 and wherein R2 is selected from the group consisting of:
- hydrogen, or any C1 to C12 hydrocarbyl group, including mixtures of cations meeting this description;
- b) 20.00% to 90.00% by weight of a nonionic surfactant;
- and
- c) 1.00% to 20.00% by weight of a polyhydroxy compound.
23) A process for producinging a soft, durable paper web comprising the steps of:
- a) forming an aqueous dispersion of cellulosic fibers useful in papermaking;
- b) depositing the aqueous dispersion of papermaking fibers on a flat surface;
- c) removing water from the aqueous dispersion of papermaking fibers;
- d) applying an aqueous composition to the fibers, wherein said aquesous composition comprises:
- i) any amount between 0.25% and 20.00% by weight based upon the total weight of said composition of a amide-substituted quaternary imidazolinium salt;
- ii) a nonionic surfactant;
- and
- iii) a polyhydroxy compound having an average molecular weight which is any molecular weight in the range of 200 to 4000,
- wherein the amide-substituted quaternary imidazolinium salt comprises a cation having the structure:
- 7
- in which R1 in each occurrence is independently selected from the group consisting of:
- hydrogen or a hydrocarbyl group comprising any number of carbon atoms between 10 to 22 and wherein R2 is selected from the group consisting of:
- hydrogen, or any C1 to C12 hydrocarbyl group, including mixtures of cations meeting this description.
27) A process for softening fabric comprising the step of pouring a chemical softening composition onto fabric wherein the chemical softening composition comprises a salt that contains a cation of a amide-substituted quaternary imidazolinium, a nonionic surfactant, and a polyhydroxy compound selected from the group consisting of:
- glycerin, polyalkylene glycols, and mixtures thereof.
29) A process for producing a treated cellulosic fiber product comprising the step of:
- contacting a cellulosic fiber with an aqueous composition comprising a amide-substituted quaternary imidazolinium salt which comprises a cation having the structure:
- 8
- in which R1 in each occurrence is independently selected from the group consisting of:
- hydrogen or a hydrocarbyl group comprising any number of carbon atoms between 8 and 22 and wherein R2 is selected from the group consisting of:
- hydrogen, or any C1 to C12 hydrocarbyl group, including mixtures of cations meeting this description.
Dependencies are inferred from the claim text.