Functionalized particles
Functionalized particles comprising a shell and a core and a payload that is embedded or entrapped, wherein the shell matrix is obtained by interfacial polymerisation of vinyltriethoxy silane and at least one other ethylenically unsaturated monomer copolymerizable with vinyltriethoxy silane, the functionalized particles being capable to chemically bind to a substrate, are suitable as controlled release systems for textile applications to impart durable softness and excellent water retention even after multiple laundries.
1 . Functionalized particles comprising a shell and a core and a payload that is embedded or entrapped, wherein the shell comprises a matrix obtained by interfacial polymerisation of ethylenically unsaturated monomers comprising vinyltriethoxy silane and styrene, wherein a majority of the ethylenically unsaturated monomers by weight comprises styrene, said functionalized particles being capable to chemically bind to a substrate, wherein the payload is a particle or water insoluble droplet.
2 . Functionalized particles according to claim 1 , comprising at least one other ethylenically unsaturated monomer, wherein the at least one other ethylenically unsaturated monomer is a hydrophobic monomer.
3 . Functionalized particles according to claim 2 , wherein the hydrophobic monomer is glycidyl methacrylate.
4 . Functionalized particles according to claim 1 , wherein the payload is a silicone softener.
5 . Functionalized particles according to claim 1 , wherein the payload is chemically bonded to the matrix of the functionalized particle.
6 . A process for the preparation of the functionalized particles according to claim 1 , which process comprises the steps of preparing an oil-in-water dispersion and causing polymerisation of vinyltriethoxy silane, styrene and at least one other ethylenically unsaturated monomer copolymerizable with vinyltriethoxy silane at an oil-water interface in the presence of the payload.
7 . A process for the preparation of a substrate modified with functionalized particles, comprising treating the substrate with the functionalized particles according to claim 1 to chemically bind the functionalized particles to the substrate.
8 . The process according to claim 7 , wherein the substrate is a fiber material containing hydroxyl groups or nitrogen-containing groups.
9 . The process according to claim 8 , wherein the fiber material is cellulose containing textile fiber material.
10 . A substrate modified with functionalized particles obtained according to the process of claim 7 .
11 . Functionalized particles according to claim 1 , wherein the functionalized particles comprise epoxide groups or epoxide precursors for chemically binding to a substrate.
12 . Functionalized particles according to claim 1 , wherein the payload is a polysiloxane.
13 . Functionalized particles according to claim 1 , wherein the payload is a functionalized siloxane polymer selected from the group consisting of aminosilicones, amidosilicones, silicone polyethers, silicone-urethane polymers, quaternary ABn silicones, amino ABn silicones, and combinations thereof.
14 . Functionalized particles according to claim 1 , wherein the payload is a silicone softener chemically bonded to the matrix of the functionalized particle.
15 . Functionalized particles comprising a polymeric shell and a polysiloxane that is embedded or entrapped, wherein the polymeric shell is obtained by polymerization of ethylenically unsaturated monomers comprising vinyltriethoxy silane, styrene and glycidyl methacrylate, wherein a majority of the ethylenically unsaturated monomers comprises styrene, and wherein the polymeric shell is capable of being covalently bound to a substrate comprising —OH, —NH or —SH groups.
16 . Functionalized particles according to claim 15 , wherein the polymeric shell comprises epoxide groups or epoxide precursor groups on an outer surface thereof.
17 . Functionalized particles according to claim 15 , wherein the polysiloxane is covalently bonded to the polymeric shell.
18 . A modified textile comprising functionalized particles and a textile, the functionalized particles comprising a polymeric shell and a silicone softener that is embedded or entrapped, wherein the shell is obtained by polymerization of ethylenically unsaturated monomers comprising vinyltriethoxy silane, styrene and glycidyl methacrylate, wherein a majority of the ethylenically unsaturated monomers comprises styrene, and wherein the polymeric shell is covalently bonded to the textile.
19 . The modified textile of claim 18 , wherein the silicone softener comprises a polysiloxane covalently bonded to the polymeric shell.
20 . The modified textile of claim 18 , wherein the textile comprises a cellulose based fabric, wool or silk.