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Delivery particles

A technology of particles and compositions, applied in hair care, lighting and heating equipment, indirect heat exchangers, etc., can solve problems such as improper preparation, non-release of beneficial agents, etc.

Inactive Publication Date: 2013-01-02
PROCTER & GAMBLE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Unfortunately, the use of the foregoing methods and raw materials to manufacture capsules has several disadvantages, including: (1) they cannot be formulated in certain product categories due to strict formulation constraints; When present in products containing high levels of surfactants, solvents and / or water, they are highly permeable, which leads to premature release of benefit agents; (3) they are only capable of effectively encapsulating a limited breadth of benefit agents; and (4) They are either so stable that they do not release the benefit agent in application, or have insufficient mechanical stability to withstand the methods required for their incorporation and / or manufacture into consumer products; and (5) they inappropriately deposit On an area being treated with consumer products containing capsules

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0340] oil phase

[0341] The oil phases were combined and stirred under a nitrogen blanket for 1 hour. Stir at 300 rpm. Add the aqueous phase and stir with a magnetic stirrer. Meanwhile, expose to UV light for about three hours. Milling was carried out at 70°C for 3 hours, while increasing the speed to 400 rpm, UV exposure was continued. Use a final grind size of 12.4.

Embodiment 2

[0343] Example 2: Thermally pre-reacted, UV-cured wall :

[0344] The system was prepared with a core consisting of 2% I6B dye in methyl soybean oil, SR355 as the main wall material, TBAEMA as the oil soluble amine and MBM as the oil soluble acid. The oil solution contains Vazo-52 (the thermal initiator) together with the photoinitiator (in this case Ciba Irgacure 651 or Ciba Darocure 1173). The aqueous phase contained another photoinitiator (Ciba Darocure 1173). Batches were prepared in glass jacketed reactors and a nitrogen blanket was applied at 300 cc / min.

[0345] The oil containing the initiator was heated to 75°C, held at 75°C for 30 minutes and cooled to 55°C within 75 minutes. Additional oil solution containing wall material was added and the mixed oils were held at 55°C for an additional 30 minutes before adding the water phase and commencing milling. After milling, the emulsion was mixed at 55°C for 45 minutes before applying the UV lamp. A 200 watt UV source ...

Embodiment 3

[0347] Example 3: UV pre-reaction, UV-cured wall :

[0348] The oil phase contained core material (in this case 2% I6B in ME-130), SR355, TBAEMA, MBM and Irgacure 651 photoinitiator. The content of the photoinitiator used is 20-80% of that of the commonly used thermal initiator. Initially half of all oil phase photoinitiators were placed in the oil phase. Batches were prepared in a jacketed glass reactor with a nitrogen blanket applied at 300 cc / min. The oil is treated with UV or the like for 5 minutes. After processing, the oily phase has generally become cloudy. Add the second half of the oil phase photoinitiator and allow to dissolve. The water phase (with water phase initiator Darocure 1173) was added and milling started. After milling, the batch walls were allowed to mix for 45 minutes before applying the UV lamp for 18 hours.

[0349] The average particle size of the UV cured capsules was 13.93 μm.

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Abstract

The present application relates to encapsulated benefit agents, compositions comprising such encapsulated benefit agents and processes for making and using compositions comprising such encapsulated benefit agents. Such encapsulated benefit agents eliminate or minimize one or more of the drawbacks of current encapsulated benefit agents and thus provide formulators with additional perfume delivery opportunities.

Description

field of invention [0001] The present invention relates to methods of capsule manufacture, microcapsules produced by such methods as well as compositions comprising such microcapsules and methods of making and using such compositions. Background of the invention [0002] Various methods for microencapsulation, and exemplary methods and materials are shown in Schwantes (U.S. 6,592,990), Nagai et al. (U.S. 4,708,924), Baker et al. (U.S. 4,166,152), Wojciak (U.S. 4,093,556) , Matsukawa et al. (U.S.3,965,033), Matsukawa et al. (U.S.3,660,304), Ozono's (U.S.4,588,639), Irgarashi et al. (U.S.4,610,927), Brown et al. (U.S.4,552,811), Scher's (U.S.4,285o20), 7 (U.S. 4,601,863), Kiritani et al. (U.S. 3,886,085), Jahns et al. (U.S. 5,596,051 and 5,292,835), Matson et al. 4,087,376;4,089,802和4,100,103)、Greene等人的(U.S.2,800,458;2,800,457和2,730,456)、Clark的(U.S.6,531,156)、Saeki等人的(U.S.4,251,386和4,356,109)、Hoshi等人的(U.S.4,221,710)、Hayford的( U.S. 4,444,699), Hasler et al. (U.S. 5,105,823), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D17/00A61K8/11B01J13/18C09K23/52
CPCB01J13/185A61K8/8152A61K8/11A61K8/8164A61Q5/02C11D17/0039A61Q19/00A61Q15/00A61K2800/56C09B67/0097F28D20/023A61Q19/10A61K2800/412A61Q5/12
Inventor J·O·迪霍拉J·斯梅兹T·A·施万特斯P·D·桑兹
Owner PROCTER & GAMBLE CO