Compositions and adhesive articles including porous polymeric particles and methods of coating substrates

An adhesive article comprising a substrate and a composition disposed on a first major surface of the substrate, the composition comprising 1) an adhesive;

• and 2) porous polymeric particles disposed in the adhesive, wherein the porous polymeric particles comprise a polymerized product of 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;
• 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 a hydrogen or alkyl;
• and
• ii) a poly(propylene glycol) having a weight average molecular weight of at least 500 grams/mole, wherein the poly(propylene glycol) is removed from the polymerized product to provide the porous polymeric particles, wherein each of the porous polymeric particles comprises a plurality of primary particles joined together.

A method of coating a substrate comprising:

• a) providing a composition;
• b) providing a substrate comprising a surface;
• and
• c) applying the composition on the surface of the substrate;
• wherein the composition comprises 1) an adhesive coating;
• and 2) porous polymeric particles disposed in the adhesive coating, wherein the porous polymeric particles comprise a polymerized product of 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;
• 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 a hydrogen or alkyl;
• and
• ii) a poly(propylene glycol) having a weight average molecular weight of at least 500 grams/mole, wherein the poly(propylene glycol) is removed from the polymerized product to provide the porous polymeric particles, wherein each of the porous polymeric particles comprises a plurality of primary particles joined together.