Method for preparing polyurethane fragrant microcapsules

Abstract

The invention relates to a manufacture method for polyurethane aroma microcapsule that is made up of polyisocyanate, essence and cyclohexane. Water phase is made up of sodium hydroxide, sodium acetylide, and deionized water. It includes the following steps: adding polyethylene glycol and acetone into oil phase, dropping into water phase for 1.5-2 hours, whisking at 400-600 rounds per minutes, keeping temperature at 40-60 degree centigrade, heating to 50-70 degree centigrade, taking reaction for 1-1.5 hour, filtering the product. The diameter of microcapsule is 20-4um, and it has high slow releasing ability. The machining of the microcapsule is convenient.

Description

technical field

[0001] The invention relates to an aromatic microcapsule for textiles, in particular to the preparation of a polyurethane aromatic microcapsule. Background technique

[0002] Fragrance microcapsules are composed of spices and encapsulated capsules, with a particle size of 20-40um. Fragrance microcapsules are widely used in the textile industry. The main functions are: to reduce the contact between fragrances and the outside world, thereby preventing the fragrance from volatilizing too quickly, reducing the loss of fragrance, having a certain slow-release effect, and prolonging the fragrance retention time. In the past, the capsule materials of aromatic microcapsules were mostly made of melamine-formaldehyde resin, gelatin and other materials. Due to the problems of unstable capsule wall and irregular porosity, the sustained-release performance is not high, and the perfume wrapped with it has a short fragrance retention time, and most of these materials are p...