Laundry care particles having a small variation in average pore radius
AssigneeThe Procter & Gamble Company
InventorsKristin Rhedrick Williams, Richard Albert Huddleston, Ke Ming Quan
Life of this patent
Estimating the term…
Abstract
A composition including a plurality of individual particles. The individual particles include a water soluble carrier and a fabric care benefit active agent. Each individual particle has a flat bottom, a rounded top, and maximum height. Each individual particle has a porous bottom third, a porous middle third, and a porous top third. The bottom third average pore radius and the top third average pore radius differ by less than about 15 μm.
Claims18
A composition comprising a plurality of individual particles, wherein said individual particles comprise:
- about 20% to about 99% by weight water soluble carrier;
- and
- about 0.1% to about 45% by weight fabric care benefit active agent;
- wherein said individual particles have a flat bottom, a rounded top, and a maximum height orthogonal to said flat bottom;
- wherein said individual particles have a porous bottom third extending from said flat bottom to a bottom third section height above said flat bottom that is one-third said maximum height and said bottom third has a bottom third average pore radius;
- wherein said individual particles have a porous middle third above said bottom third and extending from said bottom third to a middle third section height above said bottom third that is one-third of said maximum height;
- wherein said individual particles have a porous top third above said middle third and extending from said middle third to a top third section height above said middle third that is one-third of said maximum height and said top third has a top third average pore radius;
- wherein said bottom third average pore radius and said top third average pore radius differ by less than about 15 mm;
- wherein said middle third has a middle third average pore radius that is greater than each of said bottom third average pore radius and said top third average pore radius;
- and
- wherein each of said particles has a mass from about 5 mg to about 200 mg.
The composition according to 16, wherein said water soluble carrier is selected from the group of R1O-(EO)x—(PO)y—R2, R1O—(PO)x-(EO)y—R2, R1O-(EO)o—(PO)p-(EO)q—R2, R1O—(PO)o-(EO)p—(PO)q—R2, or a combination thereof, wherein
- R1 and R2 independently is H or a C1-C22 alkyl group;
- x, y, o, p, and q independently is 1 to 100, the sum of x and y is greater than 35, and the sum of o, p and q is greater than 35;
- and
- wherein the block copolymer has a weight average molecular weight ranging from 3000 Da to 15,000 Da.
Dependencies are inferred from the claim text.