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US 9,422,411 B2Granted
Reaction mixture, porous particles and methods of making
Assignee3M Innovative Properties Company
InventorsHassan Sahouani, Petra L. Kohler Riedi, Semra Colak Atan, Steven P. Swanson, Yongshang Lu
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Abstract
Porous polymeric particles are provided that can be hydrophilic or hydrophobic. The porous polymeric particles can be used for the storage and delivery of various active agents or for moisture management. Reaction mixtures for forming the porous polymeric particles, methods of making the porous polymeric particles, and articles containing the porous polymeric particles are also provided.
Claims5
A reaction mixture comprising:
- a) a first phase comprising
- i) a compound of Formula (I)
- HO[—CH2—CH(OH)—CH2—O]n—H (I)
- wherein n is an integer equal to at least 1;
- and
- ii) a nonionic surfactant;
- and
- b) a second phase dispersed in the first phase, wherein a volume of the first phase is greater than a volume of the second phase and wherein the second phase comprises
- i) a monomer composition comprising a monomer of Formula (II)
- CH2═C(R1)—(CO)—O[—CH2—CH2—O]p—(CO)—C(R1)═CH2 (II)
- wherein
- p is an integer equal to at least 1;
- R1 is hydrogen or alkyl;
- and
- ii) a polypropylene glycol) having a weight average molecular weight of at least 500 grams/mole.
12 more elements
Dependencies are inferred from the claim text.