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Improvements in or relating to organic compounds

A technology of carbonyl compounds and compositions, applied in the field of microcapsules

Inactive Publication Date: 2018-07-17
GIVAUDAN SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Examples

Experimental program
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Embodiment 1

[0303] Example 1-Cationic PU microcapsules with covalently grafted methacryloyl-oxyethyl-trimethyl-ammonium chloride (QDM) cationic molecules

[0304] Composed of 50g of polyvinylpyrrolidone (PVP) with a K value of 90 90) Prepare premix (I) with 1169 g of water and adjust the pH to 10.0 using an aqueous sodium hydroxide solution (5% by weight strength). From 500g perfume, 58g dicyclohexylmethane diisocyanate ( W) and 20g anionic HDI oligomer ( XP 2547) Preparation of premix (II). The two premixes were combined and emulsified with the aid of a Mig mixer at 700 rpm for 30 minutes at room temperature. The pH of the emulsion was then adjusted to 8.5 using aqueous sodium hydroxide (5% weight strength). Then, at room temperature and stirring at 700 rpm, 20 g of polyethyleneimine ( PR8515) in 147 g of water. The reaction mixture was then subjected to the following temperature program: heating to 60°C in 60 minutes. The temperature is maintained for 60 minutes, then at 70°C for 60...

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Abstract

@A microcapsule composition, wherein the shell of the microcapsules comprises at least one polyurea which contains at least one permanent cationic group, which is covalently bonded to the shell and the core comprises at least one perfume ingredient, and wherein the shell of the microcapsules does not contain guanidinium groups.

Description

Background of the invention [0001] The present invention relates to microcapsules having a polyurea shell and a lipophilic core containing perfume, aqueous dispersions of these microcapsules, methods for preparing these microcapsules and their uses. [0002] State of the field [0003] A microcapsule is a spherical object composed of a core and a wall material surrounding the core, wherein the core may mainly be a solid, liquid or gas component surrounded by a solid wall material. For many applications, the walls are formed of polymer materials. Microcapsules generally have a volume average diameter of 1-1000 μm. [0004] Various shell materials are known for producing microcapsule walls. The shell can be composed of natural, semi-synthetic or synthetic materials. Examples of natural shell materials are gum arabic, agar, agarose, maltodextrin, alginic acid or its salts, such as sodium or calcium alginate, fats and fatty acids, cetyl alcohol, collagen, chitosan, lecithin, Gelatin,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/16C09B67/02
CPCB01J13/16A61K8/11A61K2800/56A61L9/012A61Q13/00C11D3/505B01J13/206C08L75/02C08L2207/53
Inventor E·奥桑特I·M·哈里森
Owner GIVAUDAN SA