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US 8,784,984 B2Granted
Microcapsules, their use and processes for their manufacture
AssigneeCiba Corporation
InventorBryan David Grey
Life of this patent
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Abstract
A microcapsule comprising A) a core containing a hydrophobic liquid or wax, B) a polymeric shell comprising a) a polymer formed from a monomer mixture containing: i) 1 to 95% by weight of a hydrophobic mono functional ethylenically unsaturated monomer, ii) 5 to 99% by weight of a polyfunctional ethylenically unsaturated monomer, and iii) 0 to 60% by weight of other mono functional monomer, and b) a further hydrophobic polymer which is insoluble in the hydrophobic liquid or wax. The invention includes a process for the manufacture of particles and the use of particles in articles, such as fabrics, and coating compositions, especially for textiles.
Claims22
A microcapsule comprising
- A) a core containing a hydrophobic liquid or wax in an amount of 45 to 94% by weight of the total weight of the microcapsule,
- B) the polymeric shell having an outer surface and an inner surface, wherein the polymeric shell comprises,
- a) a polymer formed from a monomer mixture containing:
- i) 1 to 95% by weight of a hydrophobic mono functional ethylenically unsaturated monomer, wherein the hydrophobic mono functional ethylenically unsaturated monomer is C1 to C12 alkyl esters of acrylic acid, C1 to C12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids,
- ii) 5 to 99% by weight of a polyfunctional ethylenically unsaturated monomer, wherein the polyfunctional ethylenically unsaturated monomer is divinyl benzene, ethoxylated bisphenol A diacrylate, propoxylated neopentyl glycol diacrylate, tris(2-hydroxyethyl) isocyanurate triacrylate, trimethylolpropane triacrylate, or an alkane diol diacrylate, and
- iii) 0 to 60% by weight of other mono functional monomer,
- in which components (i), (ii) and (iii) total 100%,
- wherein the polymer is present in an amount of 5 to 50% by weight of the total weight of the microcapsule, and
- b) a further hydrophobic polymer which is insoluble in the hydrophobic liquid or wax,
- wherein the further hydrophobic polymer is C1 to C12 alkyl esters of acrylic acid, C1 to C12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids,
- wherein the further hydrophobic polymer is present in an amount of 0.05 to 10% by weight of the total weight of the microcapsule, and
- wherein the hydrophobic liquid or wax, polymer formed from the monomer mixture and the further hydrophobic polymer total 100% by weight of the total weight of the microcapsule.
9 more elements
A process of manufacturing microcapsules comprising
- the microcapsules comprising
- A) a core containing a hydrophobic liquid or wax in an amount of 45 to 94% by weight of the total weight of the microcapsule,
- B) a polymeric shell having an outer surface and an inner surface, wherein the polymeric shell comprises,
- a) a polymer formed from a monomer mixture containing:
- i) 1 to 95% by weight of a hydrophobic mono functional ethylenically unsaturated monomer, wherein the hydrophobic mono functional ethylenically unsaturated monomer is C1 to C12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids,
- ii) 5 to 99% by weight of a polyfunctional ethylenically unsaturated monomer, wherein the polyfunctional ethylenically unsaturated monomer is divinyl benzene, ethoxylated bisphenol A diacrylate, propoxylated neopentyl glycol diacrylate, tris(2-hydroxyethyl) isocyanurate triacrylate, trimethylolpropane triacrylate, or an alkane diol diacrylate, and
- iii) 0 to 60% by weight of other mono functional monomer,
- in which components (i), (ii) and (iii) total 100%,
- wherein the polymer is present in an amount of 5 to 50% by weight of the total weight of the microcapsule, and
- b) a further hydrophobic polymer which is insoluble in the hydrophobic liquid or wax, wherein the further hydrophobic polymer is C1 to C12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids,
- wherein the further hydrophobic polymer is present in an amount of 0.05 to 10% by weight of the total weight of the microcapsule, and
- wherein the hydrophobic liquid or wax, polymer formed from the monomer mixture and the further hydrophobic polymer total 100% by weight of the total weight of the microcapsule;
- comprising the steps,
- 1) providing the monomer mixture, 2) dissolving the further hydrophobic polymer into the monomer mixture, 3) combining the further hydrophobic polymer and the monomer mixture with the hydrophobic liquid or wax to form a monomer solution, 4) homogenizing the monomer solution into an aqueous phase to form an emulsion, 5) subjecting the emulsion to polymerization conditions, and 6) polymerization of the monomer solution to form a dispersion of the microcapsules in the aqueous phase.
11 more elements
An article comprising microcapsules, each microcapsule comprising
- A) a core containing a hydrophobic liquid or wax in an amount of 45 to 94% by weight of the total weight of the microcapsule,
- B) the polymeric shell having an outer surface and an inner surface, wherein the polymeric shell comprises
- a) a polymer formed from a monomer mixture containing:
- i) 1 to 95% by weight of a hydrophobic mono functional ethylenically unsaturated monomer, wherein the hydrophobic mono functional ethylenically unsaturated monomer is C1 to C12 alkyl esters of acrylic acid, C1 to C12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids,
- ii) 5 to 99% by weight of a polyfunctional ethylenically unsaturated monomer, wherein the polyfunctional ethylenically unsaturated monomer is divinyl benzene, ethoxylated bisphenol A diacrylate, propoxylated neopentyl glycol diacrylate, tris(2-hydroxyethyl) isocyanurate triacrylate, trimethylolpropane triacrylate, or an alkane diol diacrylate, and
- iii) 0 to 60% by weight of other mono functional monomer,
- in which components (i), (ii) and (iii) total 100%,
- wherein the polymer is present in an amount of 5 to 50% by weight of the total weight of the microcapsule, and
- b) a further hydrophobic polymer which is insoluble in the hydrophobic liquid or wax,
- wherein the further hydrophobic polymer is C1 to C12 alkyl esters of acrylic acid, C1 to C12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids,
- wherein the further hydrophobic polymer is present in an amount of 0.05 to 10% by weight of the total weight of the microcapsule, and
- wherein the hydrophobic liquid or wax, polymer formed from the monomer mixture and the further hydrophobic polymer total 100% by weight of the total weight of the microcapsule.
9 more elements
A coating composition comprising microcapsules, each microcapsule comprising
- A) a core containing a hydrophobic liquid or wax in an amount of 45 to 94% by weight of the total weight of the microcapsule,
- B) the polymeric shell having an outer surface and an inner surface, wherein the polymeric shell comprises,
- a) a polymer formed from a monomer mixture containing:
- i) 1 to 95% by weight of a hydrophobic mono functional ethylenically unsaturated monomer, wherein the hydrophobic mono functional ethylenically unsaturated monomer is C1 to C12 alkyl esters of acrylic acid, C1 to C12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids,
- ii) 5 to 99% by weight of a polyfunctional ethylenically unsaturated monomer, wherein the polyfunctional ethylenically unsaturated monomer is divinyl benzene, ethoxylated bisphenol A diacrylate, propoxylated neopentyl glycol diacrylate, tris(2-hydroxyethyl) isocyanurate triacrylate, trimethylolpropane triacrylate, or an alkane diol diacrylate, and
- iii) 0 to 60% by weight of other mono functional monomer,
- in which components (i), (ii) and (iii) total 100%,
- wherein the polymer is present in an amount of 5 to 50% by weight of the total weight of the microcapsule, and
- b) a further hydrophobic polymer which is insoluble in the hydrophobic liquid or wax,
- wherein the further hydrophobic polymer is C1 to C12 alkyl esters of acrylic acid, C1 to C12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids,
- wherein the further hydrophobic polymer is present in an amount of 0.05 to 10% by weight of the total weight of the microcapsule, and
- wherein the hydrophobic liquid or wax, polymer formed from the monomer mixture and the further hydrophobic polymer total 100% by weight of the total weight of the microcapsule.
9 more elements
A process of coating a fabric comprising the steps of
- 1) providing a textile coating composition,
- 2) applying the coating composition to a surface of the fabric, and
- 3) drying the coating to provide a coated fabric,
- in which the coating composition comprises microcapsules, each microcapsule comprising
- A) a core containing a hydrophobic liquid or wax in an amount of 45 to 94% by weight of the total weight of the microcapsule,
- B) a polymeric shell having an outer surface and an inner surface, wherein the polymeric shell comprises,
- a) a polymer formed from a monomer mixture containing:
- i) 1 to 95% by weight of a hydrophobic mono functional ethylenically unsaturated monomer, wherein the hydrophobic mono functional ethylenically unsaturated monomer is C, to C12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids,
- ii) 5 to 99% by weight of a polyfunctional ethylenically unsaturated monomer, wherein the polyfunctional ethylenically unsaturated monomer is divinyl benzene, ethoxylated bisphenol A diacrylate, propoxylated neopentyl glycol diacrylate, tris(2-hydroxyethyl) isocyanurate triacrylate, trimethylolpropane triacrylate, or an alkane diol diacrylate, and
- iii) 0 to 60% by weight of other mono functional monomer,
- in which components (i), (ii) and (iii) total 100%,
- wherein the polymer is present in an amount of 5 to 50% by weight of the total weight of the microcapsule, and
- b) a further hydrophobic polymer which is insoluble in the hydrophobic liquid or wax, wherein the further hydrophobic polymer is C1 to C12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids,
- wherein the further hydrophobic polymer is present in an amount of 0.05 to 10% by weight of the total weight of the microcapsule, and
- wherein the hydrophobic liquid or wax, polymer formed from the monomer mixture and the further hydrophobic polymer total 100% by weight of the total weight of the microcapsule;
12 more elements
Fibres comprising microcapsules, each microcapsule comprising
- A) a core containing a hydrophobic liquid or wax in an amount of 45 to 94% by weight of the total weight of the microcapsule,
- B) the polymeric shell having an outer surface and an inner surface, wherein the polymeric shell comprises
- a) a polymer formed from a monomer mixture containing:
- i) 1 to 95% by weight of a hydrophobic mono functional ethylenically unsaturated monomer, wherein the hydrophobic mono functional ethylenically unsaturated monomer is C1 to C12 alkyl esters of acrylic acid, C1 to C12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids,
- ii) 5 to 99% by weight of a polyfunctional ethylenically unsaturated monomer, wherein the polyfunctional ethylenically unsaturated monomer is divinyl benzene, ethoxylated bisphenol A diacrylate, propoxylated neopentyl glycol diacrylate, tris(2-hydroxyethyl) isocyanurate triacrylate, trimethylolpropane triacrylate, or an alkane diol diacrylate, and
- iii) 0 to 60% by weight of other mono functional monomer,
- in which components (i), (ii) and (iii) total 100%,
- wherein the polymer is present in an amount of 5 to 50% by weight of the total weight of the microcapsule, and
- b) a further hydrophobic polymer which is insoluble in the hydrophobic liquid or wax,
- wherein the further hydrophobic polymer is C1 to C12 alkyl esters of acrylic acid, C1 to C12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids,
- wherein the further hydrophobic polymer is present in an amount of 0.05 to 10% by weight of the total weight of the microcapsule, and
- wherein the hydrophobic liquid or wax, polymer formed from the monomer mixture and the further hydrophobic polymer total 100% by weight of the total weight of the microcapsule.
9 more elements
Dependencies are inferred from the claim text.