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Polyurethane encapsulate

A technology of polyurethane and ester encapsulation, which is applied in polyurea/polyurethane coatings, nitrogen fertilizers, coatings, etc., and can solve sensitive problems

Inactive Publication Date: 2015-12-02
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting polyurethane polymer forming the polyurethane coating film has good physical properties; however, it may be sensitive to external environmental components such as water

Method used

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  • Polyurethane encapsulate
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Examples

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example

[0032] The following examples are provided for illustration only and are not intended to define or limit the embodiments in any way.

[0033] The following materials are mainly used:

[0034] PAPI TM 27PMDI (polymethylene polyphenylisocyanate), available from The Dow Chemical Company,

[0035] Has a functionality of about 2.7, an isocyanate equivalent weight of about 134 and a

[0036] NCO content in % by weight.

[0037] BOTRIOL polyether polyol, which is a glycerol-initiated polyol based on butylene oxide, has

[0038] There is an approximate value of 277 for the OH number and 202 for the equivalent weight.

[0039] VORAPEL TM T5001 hydrophobic polyol (available from The Dow Chemical Company).

[0040] VORANOL TM 360 Polyether polyol, which is a sucrose / glycerol polyether, having an approximate value of 4.5

[0041] Functionality and OH number of approximation of 3 (commercially available from The Dow Chemical Company).

[0042] VORANOL TM CP-450 polyether polyol, ...

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Abstract

Embodiments relate to a polyurethane coating film that has improved water barrier properties combined with mechanical strength. According to embodiments, a polyurethane encapsulate includes a polyurethane film that is a reaction product of an aromatic isocyanate and a polyol, and the polyol includes a butylene oxide based polyether polyol in an amount of at least 35 wt% based on a total weight of the polyol. The polyurethane encapsulate further includes a particulate material that is enclosed by the polyurethane film.

Description

technical field [0001] Embodiments relate to a polyurethane encapsulation comprising a polyurethane film and particulate material encapsulated by the polyurethane film. Background technique [0002] Polyurethane coating films are used as high-efficiency coatings in a variety of applications including, for example, applications where encapsulation of water-soluble materials is desired. These water soluble materials include, for example, water soluble plant nutrients and pesticides in fertilizer granules. In the encapsulation of certain materials, such as water soluble materials, the ability to control the amount of external water absorbed into the polyurethane coating film is required. For example, in an effort to control the release rate of water-soluble materials from polyurethane encapsulation, the ability to control the permeability of components of the external environment, such as water, is desired. [0003] Polyurethane coating films are used to encapsulate specific ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48
CPCC08G18/7664C05G3/0029C08G18/4854C08G18/6688C08K5/21C08K9/10C05C9/00C05G5/37C08L75/08C09D175/04
Inventor A·L·沃特金斯J·C·麦迪纳D·莱瑟姆
Owner DOW GLOBAL TECH LLC