Preparation method of low-viscosity microcapsule-wrapped APP (ammonium polyphosphate)

An ammonium polyphosphate and microcapsule technology, applied in the treatment of dyed polymer organic compounds, fibrous fillers, etc., can solve the problems of poor flame retardant durability, poor fluidity, and thorn-like powder, and achieve excellent results. The effect of flowability and compatibility, excellent electrical properties, average particle size
CN103483873AActive Publication Date: 2014-01-01PRESAFER QINGYUAN PHOSPHOR CHEM
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
PRESAFER QINGYUAN PHOSPHOR CHEM
Publication Date
2014-01-01

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Abstract

The invention discloses a preparation method of low-viscosity microcapsule-wrapped APP. The method comprises the steps as follows: in a reaction kettle, a melamine formaldehyde resin pre-polymer and APP are dispersed in a solvent; a curing agent solution is dripped; after dripping, a backflow reaction is performed for 0.5-5 h; the temperature is decreased to 40-50 DEG C; an end-sealing agent is dripped; after dripping, a heat preservation reaction is performed for 0.5-3 h; the mixture is cooled to a room temperature; then the mixture is filtered, washed with a solved and pumped; a rake type drier is used; and the mixture is dried for 6-24 h under a pressure reduction condition, so that microcapsule-wrapped APP powder is obtained. Compared with un-wrapped APP, the microcapsule-wrapped polyphosphate powder has the characteristics of low viscosity and water solubility, excellent flowing property and compatibility, high-temperature soaking resistance, precipitation resistance, excellent electrical property and the like. The APP can be applied to high polymer materials such as polyolefin and the like and can also be applied to fabrics, epoxy and coatings.
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Description

technical field

[0001] The invention relates to a method for preparing low-viscosity microcapsule-wrapped ammonium polyphosphate. Background technique

[0002] APP is an excellent flame retardant. It has high phosphorus content and nitrogen content, and there is a P-N synergistic effect between them, so it has high flame retardant performance, and because it can be compounded with many other flame retardants to improve its flame retardancy and performance Sex, little smoke, low toxicity (LD50>10g / kg), so some people call it "environmentally friendly flame retardant".

[0003] However, due to the characteristics of its own chemical structure, it has the following inherent defects.

[0004] (1) High hygroscopicity. There are oxygen bonds in its chemical structure, and the oxygen bonds are often arranged on the outer surface, making it easy to absorb water molecules. Due to its hygroscopicity, it is not conducive to long-term storage, and its electrochemical performance ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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