Microcapsules, their use and processes for their manufacture
AssigneeBASF SE
InventorBryan David Grey
Life of this patent
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Abstract
A microcapsule comprising a core containing a hydrophobic liquid or wax and a polymeric shell formed from: i) 1 to 20% by weight of polymerizable silane compound, ii) 1 to 94% by weight of hydrophobic mono functional ethylenically unsaturated monomer, iii) 5 to 98% by weight of polyfunctional ethylenically unsaturated monomer, and iv) 0 to 60% by weight of other mono functional monomer(s), wherein components (i), (ii), (iii) and (iv) total 100%, and in which the microcapsule also includes a hydrophilic polymer which is covalently bonded to the microcapsule. 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 core containing a hydrophobic liquid or wax and a polymeric shell formed from:
- i) 1 to 20% by weight of polymerisable silane compound, wherein the silane compound is defined by formula I
- wherein R1 is selected from the group consisting of allyl, methallyl, acryloyloxyalkyl, methacryloyloxy bonded to an alkyl radical, acrylamidoalkyl and methacrylamidoalkyl, R2, R3 and R4 are each independently selected from C1-5 alkoxy groups,
- ii) 1 to 94% by weight of hydrophobic mono functional ethylenically unsaturated monomer,
- iii) 5 to 98% by weight of polyfunctional ethylenically unsaturated monomer, and
- iv) 0 to 60% by weight of other mono functional monomer(s),
- wherein components (i), (ii), (iii) and (iv) total 100%,
- and in which the microcapsule also includes a hydrophilic polymer which is covalently bonded to the microcapsule, and
- wherein the hydrophilic polymer is present in an amount between 5 to 50% by weight based on the weight of the polymeric shell.
An article comprising microcapsules each comprising a core containing a hydrophobic liquid or wax and a polymeric shell formed from:
- i) 1 to 20% by weight of polymerisable silane compound, wherein the silane compound is defined by formula I
- wherein R1 is selected from the group consisting of allyl, methallyl, acryloyloxyalkyl, methacryloyloxy bonded to an alkyl radical, acrylamidoalkyl and methacrylamidoalkyl, R2, R3 and R4 are each independently selected from C1-5 alkoxy groups,
- ii) 1 to 94% by weight of hydrophobic mono functional ethylenically unsaturated monomer,
- iii) 5 to 98% by weight of polyfunctional ethylenically unsaturated monomer, and
- iv) 0 to 60% by weight of other mono functional monomer(s),
- wherein components (i), (ii), (iii) and (iv) total 100%,
- and in which the microcapsule also includes a hydrophilic polymer which is covalently bonded to the microcapsule, and
- wherein the hydrophilic polymer is present in an amount between 5 to 50% by weight based on the weight of the polymeric shell.
A coating composition comprising microcapsules each comprising a core containing a hydrophobic liquid or wax and a polymeric shell formed from:
- i) 1 to 20% by weight of polymerisable silane compound, wherein the silane compound is defined by formula I
- wherein R1 is selected from the group consisting of allyl, methallyl, acryloyloxyalkyl, methacryloyloxy bonded to an alkyl radical, acrylamidoalkyl and methacrylamidoalkyl, R2, R3 and R4 are each independently selected from C1-5 alkoxy groups,
- ii) 1 to 94% by weight of hydrophobic mono functional ethylenically unsaturated monomer,
- iii) 5 to 98% by weight of polyfunctional ethylenically unsaturated monomer, and
- iv) 0 to 60% by weight of other mono functional monomer(s),
- wherein components (i), (ii), (iii) and (iv) total 100%,
- and in which the microcapsule also includes a hydrophilic polymer which is covalently bonded to the microcapsule, and
- wherein the hydrophilic polymer is present in an amount between 5 to 50% by weight based on the weight of the polymeric shell.
Dependencies are inferred from the claim text.