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Microcapsules

A technology of microcapsules and monomers, applied in the direction of microcapsule preparation, microsphere preparation, coating detergent composition, etc., can solve problems such as unmentioned advantages

Inactive Publication Date: 2014-09-24
TAKASAGO INTERNATIONAL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For polyfunctional monomers, preference is given to diacrylates and polyacrylates, with a highly preferred polyfunctional monomer being 1,4-butanediol diacrylate, but no mention is made of the use of non-diacrylate or Advantages of Multi-Acrylate Crosslinkers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0362] Example 1: Preparation of capsules according to the invention (samples 1 to 3)

[0363] The aqueous phase was prepared by dissolving 4.0 g poly(vinyl alcohol) (hydrolyzed to 87-89%, Mw = 85000-124000 g / mol) in 196.0 g water. The oil phase was prepared by mixing 85.0 g of each perfume substance No. 1, 2 and 3, 13.7 g of 1,4-butanediol dimethacrylate, 13.1 g of methacrylic acid and 5.2 g of methyl methacrylate and 0.9 g prepared from lauroyl peroxide. The mixture was stirred until the lauroyl peroxide was completely dissolved.

[0364] The aqueous and oil phases were placed in a 500 mL-bath reactor equipped with a condenser, thermometer, nitrogen inlet and deflocculant plates (4 cm in diameter). During all processes, the mixture was stirred at 900 rpm and nitrogen was purged through the mixture to remove oxygen. First, the mixture was heated from room temperature to 35°C within 20 min and kept at 35°C for 1 hour. The resulting emulsion was then heated to 70°C within 3...

Embodiment 2

[0367] Example 2 (Comparative): Preparation of Capsules Using Crosslinker 1,4-Butanediol Diacrylate (Samples 4 and 5)

[0368] The aqueous phase was prepared by dissolving 4.0 g poly(vinyl alcohol) (hydrolyzed to 87-89%, Mw = 85000-124000 g / mol) in 196.0 g water. The oil phase was prepared by mixing 85.0 g of each fragrance substance No. 1 and 2, 13.7 g of 1,4-butanediol diacrylate, 13.1 g of methacrylic acid and 5.2 g of methyl methacrylate and 0.9 g of lauryl peroxide acyl to prepare. The mixture was stirred until the lauroyl peroxide was completely dissolved.

[0369] The aqueous and oil phases were placed in a 500 mL-bath reactor equipped with a condenser, thermometer, nitrogen inlet and deflocculant plates (4 cm in diameter). During all processes, the mixture was stirred at 900 rpm and nitrogen was purged through the mixture to remove oxygen. First, the mixture was heated from room temperature to 35 °C within 20 min and kept at 35 °C for 1 h. The resulting emulsion wa...

Embodiment 3

[0372] Embodiment 3 (comparison): Use the preparation of the capsule of cross-linking agent pentaerythritol triacrylate (sample 6)

[0373] The aqueous phase was prepared by dissolving 4.0 g poly(vinyl alcohol) (hydrolyzed to 87-89%, Mw = 85000-124000 g / mol) in 196.0 g water. The oil phase was prepared by mixing 85.0 g of each perfume substance No. 1, 2 or 3, 13.7 g of pentaerythritol triacrylate, 13.1 g of methacrylic acid and 5.2 g of methyl methacrylate and 0.9 g of lauroyl peroxide. The mixture was stirred until the lauroyl peroxide was completely dissolved.

[0374] The aqueous and oil phases were placed in a 500 mL-bath reactor equipped with a condenser, thermometer, nitrogen inlet and deflocculant plates (4 cm in diameter). During all processes, the mixture was stirred at 900 rpm and nitrogen was purged through the mixture to remove oxygen. First, the mixture was heated from room temperature to 35 °C within 20 min and kept at 35 °C for 1 h. The resulting emulsion was...

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Abstract

A microcapsule having an average particle size of from 7.5 to 50 microns. The microcapsule contains a core and a polymeric shell enclosing the core. The core contains a core material containing an emulsifiable fragrance. The polymeric shell contains, in polymerized form, a monomer blend containing: the specific monomer (i) in an amount of from 30% to 80% by weight over the combined weight of monomers (i) and (ii); and the specific monomer (ii) in an amount of 20% to 70% by weight over the combined weight of monomers (i) and (ii).

Description

technical field [0001] The present invention relates to microcapsules having a specific average particle size comprising a fragrance-containing core and a polymer shell encapsulating said core, processes for the manufacture of such microcapsules, non-absorbable consumer products (such as household cleaners) containing such microcapsules , laundry products, personal care products and cosmetics) and the use of specific polymer crosslinkers to reduce leakage from microcapsules comprising a fragrance-containing core and a polymer shell encapsulating the core. Background technique [0002] The use of encapsulation techniques to protect ingredients such as fragrances, pesticides and pharmaceuticals during storage and to control transport is well known in many industries. Encapsulating condensation polymers containing urea, melamine, and formaldehyde are commercially used in laundry and cosmetics to control fragrance delivery and performance. However, there is concern about the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/18C11D3/50
CPCA61K2800/412A61Q19/007A61Q5/12A61K8/8152A61Q1/14A61Q13/00A61Q15/00A61K8/11A61Q5/06C11D3/505A61Q17/04B01J13/14C11D17/0039C11D3/3749C11D3/3769
Inventor J·沃尔T·里博S·福瑞泽E·奥森特O·安东尼
Owner TAKASAGO INTERNATIONAL CORPORATION
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