Microcapsules with functional reactive groups for binding to fibres and process of application and fixation
First Claim
1. A process for directly chemically binding microcapsules having a sole or outer shell of urea-formaldehyde, melamine-formaldehyde, polyamide or chitosan to fibres, comprising reacting free amino (—
- NH) or hydroxyl (—
OH) groups of the shell with a first functional group of a bifunctional compound and reacting a second functional group of the same bifunctional compound with the fibres, whereby the microcapsule is directly bonded to the fibre, through the bifunctional compound, by covalent chemical binding, wherein the bifunctional compound comprises first and second reactive functional groups, the first reactive function group is selected from the group consisting of epoxy group, halogen-substituted alkyl group, and vinyl group and wherein the second reactive functional group is a functional group selected for reaction with the fibres.
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Abstract
Microcapsules for smart textile materials, containing an active product and with reactive groups, with the objective of chemically binding the microcapsules to the fibers. The microcapsules contain active products such as PCM (phase change materials), or can be of controlled release of products such as fragrances, essential oils, antibacterial and others with the objective to add specific functional properties to the textile materials. They can be applied by padding and spraying followed by thermofixation. In case of products such as knitwear the application process can also be by exhaustion process, given that the microcapsules acquire affinity towards the fibers and react with the fibers during the process. The chemical bond of the controlled release microcapsules with the fibers confers them a higher resistance to washing than the existing microcapsules glued to the fabric by printing or padding.
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Citations
17 Claims
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1. A process for directly chemically binding microcapsules having a sole or outer shell of urea-formaldehyde, melamine-formaldehyde, polyamide or chitosan to fibres, comprising reacting free amino (—
- NH) or hydroxyl (—
OH) groups of the shell with a first functional group of a bifunctional compound and reacting a second functional group of the same bifunctional compound with the fibres, whereby the microcapsule is directly bonded to the fibre, through the bifunctional compound, by covalent chemical binding, wherein the bifunctional compound comprises first and second reactive functional groups, the first reactive function group is selected from the group consisting of epoxy group, halogen-substituted alkyl group, and vinyl group and wherein the second reactive functional group is a functional group selected for reaction with the fibres. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- NH) or hydroxyl (—
Specification