US 11,753,609 B1
Eco-friendly laundry sheet comprising a poly(2-ethyl-2-oxazoline) binder
Jenna A. Arkin, Long Beach, CA (US); Ryan K. Hood, Huntington Beach, CA (US); and Trung T. Phan, Rosemead, CA (US)
Assigned to VENUS LABORATORIES, INC., Cypress, CA (US)
Filed by Venus Laboratories, Inc., Cypress, CA (US)
Filed on Aug. 31, 2022, as Appl. No. 17/823,899.
Claims priority of provisional application 63/239,849, filed on Sep. 1, 2021.
Int. Cl. C11D 17/06 (2006.01); C11D 1/12 (2006.01); C11D 3/22 (2006.01); C11D 1/86 (2006.01); C11D 3/386 (2006.01); C11D 1/62 (2006.01)
CPC C11D 17/06 (2013.01) [C11D 1/12 (2013.01); C11D 1/62 (2013.01); C11D 1/86 (2013.01); C11D 3/222 (2013.01); C11D 3/38609 (2013.01)] 16 Claims
1. A laundry detergent sheet, comprising:
a) 5-35 wt. % of a bio-based polymer matrix, said bio-based polymer matrix configured in the form of a water-soluble sheet;
b) detergent components including a surfactant system comprising:
i) 0.1-30 wt. % of a neutrally charged surfactant; and
ii) 1-15 wt. % of an anionic surfactant, said neutrally charged surfactant and anionic surfactant each comprising non-petroleum derived carbons; and
c) a water-soluble, shear-stabilizing polymer comprising poly(2-ethyl-2-oxazoline), said poly(2-ethyl-2-oxazoline) incorporated in the bio-based polymer matrix; wherein the bio-based polymer matrix is configured to bind and suspend the detergent components when the bio-based polymer matrix is in solid sheet form and to release the detergent components when the bio-based polymer matrix contacts a sufficient volume of water; and wherein the laundry detergent sheet contains no detectable amount of polyvinyl alcohol.