阅读说明：本技术 有机化合物中或与之相关的改进 (Improvements in or relating to organic compounds ) 是由 S·哈布诺伊 E·奥桑特 V·波克凯特 S·盖内布雷迪尔 F·罗伯特 于 2019-03-06 设计创作，主要内容包括：公开了用于制备包封的香料组合物的方法。所述组合物包含多个分散在分散介质中的微胶囊。所述微胶囊包含芯和围绕所述芯的壳。所述方法包括下列连续步骤：a)提供包含至少一种阴离子改性的多异氰酸酯(A)的水相(I)；b)提供包含至少一种香料成分的有机相(II)；c)混合所述水相(I)和所述有机相(II),得到混合物；d)形成在连续的水相(I)中包含有机相(II)的液滴的乳状液；e)添加到少一种多官能胺；f)在步骤d)中形成的液滴周围形成壳,得到微胶囊分散体。所述方法包括下列额外的步骤：添加不同于多异氰酸酯(A)的多异氰酸酯(B)。(A process for preparing an encapsulated perfume composition is disclosed. The composition comprises a plurality of microcapsules dispersed in a dispersing medium. The microcapsules comprise a core and a shell surrounding the core. The method comprises the following successive steps: a) providing an aqueous phase (I) comprising at least one anionically modified polyisocyanate (A); b) providing an organic phase (II) comprising at least one perfume ingredient; c) mixing the aqueous phase (I) and the organic phase (II) to obtain a mixture; d) forming an emulsion comprising droplets of the organic phase (II) in a continuous aqueous phase (I); e) adding at least one polyfunctional amine; f) forming a shell around the droplets formed in step d) resulting in a microcapsule dispersion. The method comprises the following additional steps: adding a polyisocyanate (B) different from the polyisocyanate (A).)

1. A process for preparing an encapsulated perfume composition, said composition comprising a plurality of microcapsules dispersed in a dispersing medium, said microcapsules comprising a core and a shell surrounding said core, said process comprising the sequential steps of:

a) providing an aqueous phase (I) comprising at least one anionically modified polyisocyanate (A);

b) providing an organic phase (II) comprising at least one perfume ingredient;

c) mixing the aqueous phase (I) and the organic phase (II) to obtain a mixture;

d) forming an emulsion comprising droplets of the organic phase (II) in a continuous aqueous phase (I);

e) adding at least one polyfunctional amine;

f) forming a shell around the droplets formed in step d) to obtain a microcapsule dispersion;

wherein the method comprises the following additional steps:

adding a polyisocyanate (B) different from the polyisocyanate (A).

2. The process of claim 1, wherein polyisocyanate (B) is added during step c).

3. The process of claim 1, wherein polyisocyanate (B) is added after step c) and before step d).

4. The process of claim 1, wherein polyisocyanate (B) is added during step d).

5. The process according to any of claims 1 to 4, wherein the anionically modified polyisocyanate (A) is of the formula (1)

6. The process according to any of claims 1 to 5, wherein the aqueous phase (I) provided in step a) further comprises a dispersing aid different from the anionically modified polyisocyanate (A), in particular a nonionic dispersing aid.

7. The process according to any of claims 1 to 6, wherein the polyisocyanate (B) is a nonionic polyisocyanate.

8. The process of claim 7 wherein the nonionic polyisocyanate is selected from the group consisting of dicyclohexylmethane diisocyanate, hexamethylene diisocyanate and isophorone diisocyanate.

9. The method of any of claims 1-8, wherein the polyfunctional amine is a polyethyleneimine comprising the following repeating units

Wherein

x is from 8 to 1500, preferably from 10 to 1000;

y is 0 to 10, preferably 0 to 5, in particular 0; and is

z is 2+ y.

10. The process according to any one of claims 1 to 9, wherein the aqueous phase (I) further comprises a cationic polymer.

11. The method of any one of claims 1-9, further comprising the steps of:

a cationic polymer is added.

12. The method according to one of claims 10 or 11, wherein the cationic polymer is an amphoteric copolymer derived from cationic monomers or monomers which can form cations, in particular monomers comprising at least one quaternary ammonium group, anionic monomers or monomers which can form anions, in particular based on acrylic acid, methacrylic acid or derivatives thereof, and optionally nonionic monomers.

13. Use of an anionically modified polyisocyanate as a dispersing aid in a process for preparing an encapsulated perfume composition.

14. An encapsulated perfume composition obtainable by the process of any one of claims 1 to 12.

15. A consumer product, in particular a personal care product, a home care product or a laundry care product, comprising the encapsulated perfume composition of claim 14.

Example 1: capsule synthesis using poly (vinyl pyrrolidone) as a dispersing aid

Preparation of 130g of polyvinylpyrrolidone (PVP K60, ex Ashland), 6g based on hexamethylene diisocyanate (XP2547, ex Covestro) and 450g of waterLiquid, pH adjusted to 9 using buffer salts. The encapsulated 300g of perfume was mixed with water. To this mixture was added 25g of 4, 4-dicyclohexylmethanediyl diisocyanate (W1, ex Covestro). The resulting mixture was emulsified at room temperature with the aid of a stirring apparatus. The emulsification process is allowed to proceed to the desired droplet size. Then 10g of a polyethyleneimine solution (A) are added in one stepG100, ex BASF, as commercially available). The mixture was heated stepwise to 80 ℃ for 4 h. After polymerization, 18g of ammonia solution and 3g of hydroxyethyl cellulose (Natrosol 250HX, ex Ashland) were added. The mixture was then cooled to room temperature.

An encapsulated perfume composition is obtained. The volume-averaged capsule size distribution obtained by means of light scattering measurements using a Malvern 2000S instrument was D (50) 16 μm and D (90) 30 μm. The zeta potential was-5 mV.