Coated powder particles

a technology of powder particles and cyclopropene compound, which is applied in the direction of food preservation, pest control, plant growth regulators, etc., can solve the problems of unfavorable plant or plant parts contact, undesirable amounts of cyclopropene compound to be released into the atmosphere, and the cyclopropene compound to release too quickly from the encapsulation complex,

Inactive Publication Date: 2012-01-05
AGROFRESH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007](b) one or more inner particles (II) comprising one or more complex that contains a cyclopropene compound molecule or a portion of a cyclopropene compound molecule encapsulated in a molecule of a molecular encapsulating agent.

Problems solved by technology

One difficulty that arises with such a method of making and using such liquid compositions is that contact with water may cause the cyclopropene compound to release from the encapsulation complex too quickly.
Release of cyclopropene compound that happens too quickly can cause several problems.
If the liquid composition is in an enclosed container such as a spray tank, undesirably high levels of cyclopropene compound may accumulate in the headspace of the container.
Also, if the liquid composition is sprayed or is placed into an open tank (e.g., an open tank into which plants or plant parts will be dipped), undesirable amounts of cyclopropene compound may be released to the atmosphere and become unavailable for coming into contact with plants or plant parts.
It is desired to provide a powder composition that contains one or more cyclopropene compound and that, when mixed with water, retards the release of cyclopropene compound but does not entirely prevent the release of cyclopropene compound.

Method used

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  • Coated powder particles

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0082]Comparative Formulation CF11 was a comparative formulation, made using powder AP1 and other ingredients but no FC50. The concentration of 1-MCP in Comparative Formulation CF11 was 1% by weight, based on the weight of CF11. 0.06 gram of CF11 and 10 ml of SOL1 (to give a solution in which the concentration of 1-MCP was 50 mg per liter of solution.) were added to a 250 ml bottle. The release of 1-MCP was measured using procedure P2.

[0083]Formulation F12 was made as follows. Coated Powder was made using AP1 (10% by weight) and stearic acid (90% by weight) in Procedure P1. 0.2 gram of the coated powder was added to a 250 ml bottle containing 10 ml of SOL1. The amount of AP1 was chosen to yield a solution having approximately 50 mg of 1-MCP per liter of solution. The release of 1-MCP was measured using procedure P2.

[0084]Results were as follows:

CF11F12time (min)% 1-MPC releasedtime (min)% 1-MCP released3.5413176.55162610601033157015402076254625784053308660574093906350961206960100166...

example 2

Effect of Particle Size

[0085]Formulation F21 was made as follows. Coated Powder was made using AP1 (10% by weight) and WX1 (90% by weight) in Procedure P1, using conditions adjusted to yield coated powder with median particle diameter of 30 micrometers. The coated powder (0.14 gram) was added to a 250 ml bottle containing 10 ml of SOL1. The amount of AP1 was chosen to yield a formulation having approximately 50 mg of 1-MCP per liter of formulation.

[0086]Formulation F22 was made identically to F21, except that the conditions in Procedure P1 were chosen to yield coated powder with median particle diameter of 60 micrometers.

[0087]The formulations were tested by Procedure P2. Results were as follows:

F21 (30 micrometers)F22 (60 micrometerstime (min)% 1-MPC releasedtime (min)% 1-MCP released1020109303230166044602212053120301955919538120077120067

[0088]Formulation F22 had slower release of 1-MCP than Formulation F21.

example 3

Headspace in a Commercial Spray Tank

[0089]Tests were conducted using the tank of a Hardi™ ES-50 commercial sprayer. The capacity of the tank was 191 liter (50 gallon).

[0090]Comparative Formulation CF31 was identical to CF11. CF31 was added to 191 liters of tap water in the tank. Concentration of 1-MCP in the tank was 25 mg / liter.

[0091]Formulation F32 was made as follows. Coated Powder was made using AP1 (10% by weight), WX1 (89.5% by weight), and DP1 (0.5% DP1), using Procedure P1. The powder blend was made as follows: Coated powder was blended with 1.9% (by weight based on the weight of powder blend) SLS (powder) and 4.8% SS2 (by weight based on the weight of powder blend). 191 liter of tap water containing 0.025% SS1, by volume based on the volume of the tap water, was added to the tank. Then some of the water was removed and used to form a slurry with Formulation F32, and the slurry was then added to the remaining water in the tank, with agitation. Concentration of 1-MCP in the t...

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Abstract

There is provided a powder composition comprising a collection of particles (I) having median particle diameter of 10 micrometers to 200 micrometers, wherein each of said particles (I) comprises
    • (a) a covering of a fatty compound having melting point of 50° C. to 110° C. and
    • (b) one or more inner particles (II) comprising one or more complex that contains a cyclopropene compound molecule or a portion of a cyclopropene compound molecule encapsulated in a molecule of a molecular encapsulating agent.
Also provided is a slurry comprising water and such a powder. Also provided is a method of contacting plants or plant parts with such a slurry.

Description

BACKGROUND[0001]One desirable way of treating plants or plant parts is to prepare a liquid composition that contains one or more cyclopropene compound and then apply that liquid composition to plants or plant parts. It is contemplated that such treatment is useful for blocking the effects of ethylene in the treated plants or plant parts. One useful way of preparing such a liquid composition is to make an encapsulation complex in which a molecule of a cyclopropene compound is encapsulated in a molecule of a molecular encapsulation agent. The encapsulation complex can be made into a powder, which can be conveniently stored and transported. One method of using such a powder is to make a liquid composition by mixing the powder with water, possibly along with other ingredients, and bringing the resulting liquid composition into contact with plants or plant parts, for example by spraying or dipping.[0002]One difficulty that arises with such a method of making and using such liquid composi...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A01N27/00A01P21/00
CPCA01N27/00A23B7/154A01N25/26A01N25/04A01N25/12A01N25/28
Inventor ZHEN, YUEQIAN
Owner AGROFRESH
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