Improvements in or Relating to Organic Compounds

Patent metadata

Field	Value
Publication number	US-2018318785-A1
Application number	US-201615770064-A
Country	US
Kind code	A1
Filing date	Nov 16, 2016
Priority date	Nov 18, 2015
Publication date	Nov 8, 2018
Grant date	—

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.

First claim

1 . 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.

2 . The microcapsule composition according to claim 1 , wherein the cationic group is selected from nitrogen-containing groups and phosphorus-containing groups, preferably quaternary ammonium groups.

3 . The microcapsule composition according to claim 1 , wherein the microcapsule comprises at least one α,β-unsaturated carbonyl compound, heaving at least one permanent cationic group, in polymerizied form which is selected from:
a) the esters of α,β-ethylenically unsaturated mono- and dicarboxylic acids with amino alcohols,
b) amides of α,β-ethylenically unsaturated mono- and dicarboxylic acids with diamines which have at least one primary or secondary amino group,
c) N,N-diallylamine, N,N-diallyl-N-alkylamines and derivatives thereof,
d) vinyl- and allyl-substituted nitrogen heterocycles and mixtures thereof.

4 . The microcapsule composition according to claim 3 , wherein the amount of the α,β-unsaturated carbonyl compound in polymerized form is from 1 to 50% by weight based on the total weight of the capsule shell of the microcapsules.

5 . The microcapsule composition according to claim 1 , wherein the microcapsules have a volume average diameter of 2 to 90 μm.

6 . The microcapsule composition according to claim 1 , wherein the core of the microcapsule is 60 to 97% by weight and the shell of the microcapsule is 40 to 3% by weight, based on the total weight of the microcapsule.

7 . The microcapsule composition according to claim 1 in the form of an aqueous dispersion.

8 . The microcapsule composition according to claim 1 , wherein the microcapsules have a zeta potential from 6 to 100 mV.

9 . A process of preparing a microcapsule composition, wherein the shell of the microcapsules comprises at least one polyurea which contains at least one cationic group covalently bound to the shell, and the core comprises at least one perfume ingredient, the process comprising the steps of:
a) providing a premix (I) comprising at least one protective colloid in an aqueous solution, b) providing a premix (II) comprising a lipophilic phase containing at least one polyisocyanate and the at least one perfume ingredient, c) mixing premix (I) and premix (II) until an emulsion (III) is formed, d) adding an aqueous solution (IV) containing at least one polyfunctional amine to the emulsion formed in step c), e) forming a dispersion of microcapsules by heating the mixture obtained in step d) to a temperature of at least 50° C. and f) adding at least one α,β-unsaturated carbonyl compound having at least one permanent cationic group.

10 . The process according to claim 9 , additionally comprising the step of:
g) subjecting the microcapsule obtained in step f) to drying.

11 . The process according to claim 9 , wherein the premix (II) comprises at least one nonionic polyisocyanate (A) and at least one anionically modified isocyanate (B).

10 . The process according to claim 11 , wherein the weight ratio of isocyanates (A) and (B) is in the range from of 10:1 to 1:10.

11 . The process according to claim 10 , wherein the polyfunctional amine especially comprises or consists of at least one polyethyleneimine.

12 . A microcapsule composition obtainable by the process of claim 10 .

13 . (canceled)

14 . (canceled)

15 . The process of claim 11 , wherein the anionically modified isocyanate (B) contains at least one sulfonic acid group in the molecule.

16 . The process of claim 15 wherein the weight ratio of isocyanates (A) and (B) is in the range of 5:1 to 1:5.

17 . The process of claim 10 wherein the weight ratio of isocyanates (A) and (B) is in the range of 3:1 to 1:1.

18 . A personal care composition, air care composition, home care composition or a laundry care composition comprising microcapsules according to claim 1 .

19 . A personal care composition, air care composition, home care composition or a laundry care composition comprising microcapsules prepared by the process of claim 9 .

Assignees

• Givaudan Sa

Inventors

• Aussant Emmanuel
• Harrison Ian Michael

Classifications

• C08L2207/53

  Core-shell polymer · CPC title

• B01J13/16 Primary

  Interfacial polymerisation · CPC title

• B01J13/206

  Hardening; drying · CPC title

• C08L75/02

  Polyureas · CPC title

• C11D3/505

  encapsulated or adsorbed on a carrier, e.g. zeolite or clay · CPC title