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System for delivery of low water demand cyclopropene

A technology of cyclopropene and cyclodextrin, which is applied in the protection of fruits/vegetables, application, and plant preservation with chemicals, and can solve problems such as explosion hazards

Inactive Publication Date: 2002-05-01
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problem with these compounds is that they are typically unstable gases that present an explosion hazard when compressed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment l

[0044] Example 1 Release of 1-methylcyclopropene by moisture

[0045] A dry blend mixture of 50% 1-methylcyclopropene ("MCP") / α-cyclodextrin complex powder and 50% (by weight) glucose powder was prepared as a control, and as a blend with various additives. raw material. Prepare two samples. The first was to blend 0.1 g of the mixture with 0.5 g of calcium chloride powder and place the mixture in a high humidity chamber, being careful not to allow the powder blend to come into direct contact with any water. The second was to blend 0.1 g of the mixture with 3.0 calcium chloride powder and place the mixture in a high humidity chamber, again taking care not to allow the powder blend to come into direct contact with any water. Separate mixtures were used as two parallel controls. The first control was treated in the same manner as calcium chloride above, except that 0.10 g of the dry blend mixture was used instead of calcium chloride. The second control used 0.10 g of the dry b...

Embodiment 2

[0048] Example 2 Release of 1-methylcyclopropene by moisture

[0049] A dry blend mixture of 50% 1-methylcyclopropene / α-cyclodextrin complex powder and 50% dextrose powder (by weight) was prepared as a control, and as a compound with superabsorbent polymer ASAP® 1100 (Chemical Corp. - Raw material for blending of BASF, Portsmouth, VA) and Sanwet(R) IM-300 (Sanyo Chemical, Kyoto, Japan). Samples were prepared by mixing 0.3 g of the dry blend mixture with 1.0 g of polymer powder and placing the blend in a paper filter bag. The bag was then immersed in water for 10 seconds and placed in the chamber, which was then sealed. The 1-methylcyclopropene release profile of the samples was determined by periodically analyzing each headspace for 1-methylcyclopropene as in Example 1. The dry blend mixture alone as a control was bagged, immersed in water, and analyzed in the same manner. Table 2 shows the resulting average release properties for the two superabsorbent polymer samples and ...

Embodiment 3

[0052] Example 3 Slow release of 1-methylcyclopropene by limited exposure to water

[0053] This example repeats Example 2 with ASAP® 1100 superabsorbent polymer, except that the dry blend mixture is encapsulated in poly in a vinyl bag.

[0054] Table 3 shows the performance of the system. The bag significantly delayed the wettability of the dry blend mixture and demonstrated a delayed (24 hour) 1-methylcyclopropene release rather than the 2 hour 1-methylcyclopropene release without the polyvinyl alcohol bag.

[0055] Release time (hours)

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PUM

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Abstract

The present invention relates to new delivery systems for cyclopropenes in which compositions comprising the cyclopropene and a molecular encapsulation agent complex further comprise additional components which provide slow release of the cyclopropene from the molecular encapsulating agent with water, or release of the cyclopropene from the molecular encapsulating agent with only small amounts of water, or both. The present invention also provides methods to release a cyclopropene from such compositions as well as methods to deliver a cyclopropene compound to a plant to inhibit an ethylene response in the plant.

Description

field of invention [0001] The present invention relates to a new delivery system for cyclopropene in which the composition containing the cyclopropene and molecular encapsulating agent complex includes an additional component which provides enhanced delivery of water from the molecular encapsulating agent. Cyclopropene release. These cyclopropenes and their derivatives, such as methylcyclopropene, inhibit the ethylene response in plants. The cyclopropene / molecular encapsulant complex provides a conventional means for storing and transporting cyclopropene which is a reactive gas and highly unstable due to oxidation and other potential reactions. These complexes also provide a general means of delivering these compounds into plants to prolong their storage life. Background technique [0002] It is well known that ethylene can cause premature death of plants or plant parts including, for example, flowers, leaves, fruits, and vegetables by binding to sev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N3/02A01G7/06A01N25/10A01N25/28A01N27/00A23B7/14
CPCA01N27/00A01N3/02A01N25/18A01N25/10A01N25/08A01N2300/00
Inventor E·C·科斯坦赛克
Owner ROHM & HAAS CO
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