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Polyurea or polyurethane capsules

A polyurethane and capsule technology, applied in and through a field, can solve the problems of low olfactory intensity, low stability, high toxicity and so on

Active Publication Date: 2020-02-28
INTERNATIONAL FLAVORS & FRAGRANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Known polyurea or polyurethane capsules face various problems such as low olfactory intensity, low stability and high toxicity

Method used

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  • Polyurea or polyurethane capsules
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  • Polyurea or polyurethane capsules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0200] Example 1: Preparation of polyurea capsules with TAKENATE D-110N

[0201] Preparation of fragrance emulsion. Weigh 96 g of fragrance Greenfields (International Flavors and Fragrance, Union Beach, NJ) and mix it with 24 g of NEOBEE oil (Stepan, Chicago, IL) and 9.6 g of isocyanate monomer TAKENATE D-110N (Mitsui Chemicals Corporation, Rye Brook, NY) to form the oil phase. In a separate beaker, a 1.0% surfactant solution (160 grams) was prepared by dissolving a sufficient amount of FLEXAN II (Akzo Nobel, Bridgewater, NJ) in deionized (DI) water. The oil phase was then emulsified into the water phase by shearing (ULTRATURRAX, T25 Basic and IKA WERKE) at 6500 rpm for two minutes to form a perfume emulsion.

[0202] Formation of fragrance capsules. The fragrance emulsion was heated to 35°C in a round bottom vessel and 10.4 g of 56% tris(2-aminoethyl)amine (Sigma-Aldrich, St. Louis, MO). Capsule formation was immediately visible by light microscopy. The stirrer speed was ...

Embodiment 2

[0203] Example 2: Curing of Polyurea Capsules at High Temperature

[0204] Preparation of fragrance emulsion. Weigh 96 g of fragrance Greenfields (International Flavors and Fragrance, Union Beach, NJ) and mix it with 24 g of NEOBEE oil (Stepan, Chicago, IL) and 9.6 g of isocyanate monomer TAKENATE D-110N (Mitsui Chemicals Corporation, Rye Brook, NY) to form the oil phase. In a separate beaker, a 1.0% surfactant solution (160 grams) was prepared by dissolving sufficient FLEXAN II (Akzo Nobel, Bridgewater, NJ) in water. The oil phase was then emulsified into the water phase by shearing (ULTRA TURRAX, T25Basic and IKA WERKE) at 6500 rpm for two minutes to form a perfume emulsion.

[0205] Formation of fragrance capsules. The fragrance emulsion was heated to 35°C in a round bottom vessel and 10.4 g of 56% tris(2-aminoethyl)amine (Sigma-Aldrich, St. Louis, MO). Capsule formation was immediately visible by light microscopy. The stirrer speed was reduced after the addition of tri...

Embodiment 3

[0206] Example 3: Preparation of Polyurea Capsules with Dispersion Mixture

[0207] Preparation of fragrance emulsion. Weigh 96 g of fragrance Greenfields (International Flavors and Fragrance, Union Beach, NJ) and mix it with 24 g of NEOBEE oil (Stepan, Chicago, IL) and 9.6 g of isocyanate monomer TAKENATE D-110N (Mitsui Chemicals Corporation, Rye Brook, NY) to form the oil phase. In a separate beaker, a solution (130 g) containing 1.0% FLEXAN II (Akzo Nobel, Bridgewater, NJ) was mixed with 1% aqueous CMC (30 g) to form an aqueous phase. The oil phase was then emulsified into the water phase by shearing (ULTRATURRAX, T25 Basic, IKA WERKE) at 6500 rpm for two minutes to form a perfume emulsion.

[0208] Formation of fragrance capsules. The fragrance emulsion was heated to 35°C in a round bottom vessel and 10.4 g of 56% tris(2-aminoethyl)amine (Sigma-Aldrich, St. Louis, MO). Capsule formation was immediately visible by light microscopy. The stirrer speed was reduced after th...

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Abstract

The present invention relates to a polyurea or polyurethane capsule composition. These compositions contain a plurality of capsules and a capsule forming aid, wherein each capsule contains a polyurea or polyurethane wall and an oil core; the polyurea or polyurethane wall is composed of a polyisocyanate and a crosslinking agent in the presence of the capsule forming aid The reaction product of ; and the oil core contains the active substance. Polyisocyanates, crosslinking agents and encapsulation aids are described herein. Also disclosed herein are methods for preparing polyurea and polyurethane capsule compositions and consumer products containing any of these compositions.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to the following three US patent applications: Serial Nos. 13 / 967,800, 13 / 968,862, and 13 / 969,038, all filed on August 16, 2013. Each of these applications is a continuation-in-part of U.S. Patent Application Serial No. 13 / 163,320, filed June 17, 2011, which is a continuation-in-part of U.S. Patent Application Serial No. 12 / 883,337, filed September 16, 2010 (now abandoned). A continuation-in-part of US Patent Application Serial No. 12 / 562,578 filed September 18, 2009 (now US Patent No. 8,299,011). The content of the aforementioned application is incorporated herein by reference in its entirety. Background technique [0003] Nanocapsules or microcapsules are used in a variety of different applications where there is a need to deliver, apply or release active substances, including fragrances, flavors and malodors, to a target area in a delayed or controlled manner Disinfectant. Various t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/11B01J13/14C08L75/00
CPCA61K8/11B01J13/14A61Q19/00A61K8/84A61K2800/10A61K2800/412C11D3/505C08G18/6423C08G18/6446C08G18/7831C08G18/792C08G18/794C08G18/8029C08G18/3228C08G18/3256C08L75/02C11D17/0039
Inventor 雷亚斌徐力L·M·波普尔韦尔
Owner INTERNATIONAL FLAVORS & FRAGRANCES
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