Articles of manufacture comprising hydrocarbon fluids and water-soluble polymer particles and processes for making same

• US 9,758,748 B2
• Filed: 03/20/2014
• Issued: 09/12/2017
• Est. Priority Date: 03/20/2013
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Neal, Charles William
• Primary Examiner(s): BOYER, CHARLES I
• Application Number:
  US14/220,161
• Publication Number:
  US 20140287977A1
• Time in Patent Office: 1,272 Days
• CPC Class Codes: C11D 3/3757 (Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
• CPC Class Codes: D21H 17/04 Hydrocarbons
• CPC Class Codes: D21H 17/37 Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
• CPC Class Codes: D21H 27/002 Tissue paper; Absorbent paper D21H21/22, D21H27/02, D21H27/20 take precedence; toilet paper A47K10/00; absorbent pads for physiological fluids A61L15/16; making on paper-making machines D21F11/00

Abstract

Articles of manufacture, such as paper towels, that contain polymer particles, for example water-soluble polymer particles, for example water-soluble soil adsorbing polymer particles and processes for making same are provided.

Claims

1. A dry wet-laid paper towel comprising;

a) less than 20% by weight moisture as measured according to the Moisture Content Test Method;

b) a plurality of water-soluble polymer particles wherein the water-soluble polymer particles comprise a soil adsorbing polymer;

c) a hydrocarbon fluid comprising an ester; and

d) a hydrocarbon fluid comprising white mineral oil;

such that the dry wet-laid paper towel adsorbs soil during use, wherein the hydrocarbon fluids exhibit a VOC content of less than 60% as measured according to the VOC Test Method.

2. The dry wet-laid paper towel according to claim 1 wherein the soil adsorbing polymer comprises a monomeric unit derived from an acrylamide compound.

3. The dry wet-laid paper towel according to claim 1 wherein the soil adsorbing polymer comprises a monomeric unit derived from acrylic acid.

4. The dry wet-laid paper towel according to claim 1 wherein the soil adsorbing polymer exhibits a net negative charge density as measured according to the Charge Density Test Method.

5. The dry wet-laid paper towel according to claim 1 wherein the soil adsorbing polymer exhibits a UL Viscosity of from about 1 to about 6 cP as measured according to the Bulk Viscosity Test Method.

6. The dry wet-laid paper towel according to claim 1 wherein at least a portion of the water-soluble polymer particles are present on a surface of the dry wet-laid paper towel.

7. The dry wet-laid paper towel according to claim 1 wherein the dry wet-laid paper towel comprises greater than 0.005% by weight of the dry wet-laid paper towel of the water-soluble polymer particles.

8. The dry wet-laid paper towel according to claim 1 wherein the ester comprises octyl stearate.

9. The dry wet-laid paper towel according to claim 1 wherein the dry wet-laid paper towel comprises greater than 0.005% by weight of the dry wet-laid paper towel of the hydrocarbon fluids.

10. The dry wet-laid paper towel according to claim 1 wherein the dry wet-laid paper towel further comprises from 0% to less than 10% by weight of the dry wet-laid paper towel of water.

11. The dry wet-laid paper towel according to claim 1 wherein the dry wet-laid paper towel comprises less than 350 ppm of residual acrylamide monomer as measured according to the Acrylamide Monomer Test Method.

12. The dry wet-laid paper towel according to claim 1 wherein the dry wet-laid paper towel exhibits an initial Average Soil Adsorption Value of greater than 90 mg/g dry wet-laid paper towel as measured according to the Soil Adsorption Test Method.

13. The dry wet-laid paper towel according to claim 12 wherein the dry wet-laid paper towel exhibits an Average Soil Adsorption Value of greater than 90 mg/g dry wet-laid paper towel as measured according to the Soil Adsorption Test Method after being subjected to the Stress Aging Procedure.

14. The dry wet-laid paper towel according to claim 1 wherein the dry wet-laid paper towel exhibits an initial Average Mirror Densitometer Value of greater than −

0.46 as measured according to the Mirror Cleaning Test Method.

15. The dry wet-laid paper towel according to claim 14 wherein the dry wet-laid paper towel exhibits an Average Mirror Densitometer Value of greater than −

0.46 as measured according to the Mirror Cleaning Test Method after being subjected to Stress Aging Procedure.

16. A process for making a dry wet-laid paper towel according to claim 1 wherein the process comprises the step of contacting a dry wet-laid paper towel with a dewatered emulsion comprising:

1) a continuous phase comprising a hydrocarbon fluid comprising an ester and a hydrocarbon fluid comprising white mineral oil, wherein the hydrocarbon fluids exhibit a VOC content of less than 60% as measured according to the VOC Test Method and

2) a dispersed phase comprising a plurality of water-soluble polymer particles such that the dry wet-laid paper towel is formed.