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High-purity piperazine pyrophosphate and method for producing same

A technology of piperazine pyrophosphate and piperazine diphosphate, which is applied in the field of high-purity piperazine pyrophosphate and its manufacture, can solve the problem of inability to manufacture piperazine pyrophosphate cheaply, unable to obtain flame retardancy, and poor physical properties of synthetic resins. And other issues

Active Publication Date: 2006-10-11
ADEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] As mentioned above, the problem to be solved by the present invention is: when piperazine pyrophosphate obtained by the existing method is used as a component of the flame retardant composition, due to the influence of impurities, the following situation exists: The synthetic resin of the flame retardant composition has poor physical properties or a flame retardant composition exhibiting excellent flame retardancy cannot be obtained; and piperazine pyrophosphate cannot be cheaply produced by existing methods

Method used

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  • High-purity piperazine pyrophosphate and method for producing same
  • High-purity piperazine pyrophosphate and method for producing same
  • High-purity piperazine pyrophosphate and method for producing same

Examples

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Effect test

Embodiment 1

[0040] Using an extruder (manufactured by Japan Steel Works, TEX44αII-52.5BW), under the condition that the barrel temperature is 230-280°C, the raw material supply speed is 25kg / h, and the screw speed is 60rpm, piperazine diphosphate is heated and mixed to obtain White powder of piperazine pyrophosphate.

Embodiment 2

[0042] Using a Henschel mixer (manufactured by Mitsui Mine, FM150J / T, capacity 150L), under the conditions of heating temperature 190-250°C and rotation speed 704-1000rpm, heat and mix 40 kg of piperazine diphosphate for 1 hour to obtain coke White powder of piperazine phosphate.

Embodiment 3

[0044] Using a Henschel mixer (manufactured by Mitsui Mine, FM150J / T, capacity 150L), at a heating temperature of 170 to 250°C and a rotating speed of 990 to 1590rpm, 5kg of piperazine diphosphate and 100g of 75% by weight of Phosphoric acid is heated and mixed to obtain a white powder of piperazine pyrophosphate.

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Abstract

The present invention provides piperazine pyrophosphate represented by chemical formula (I) which has a sodium content of 10 ppm or lower and a process of producing the same. The piperazine pyrophosphate has high purity and provides a flame retardant composition exhibiting excellent flame retardancy. The process includes dehydration condensation of piperazine diphosphate and is able to produce the piperazine pyrophosphate at low cost.

Description

technical field [0001] The present invention relates to piperazine pyrophosphate with a low sodium content and a method for producing the same. More specifically, the present invention relates to piperazine pyrophosphate useful as one component of a flame retardant composition added to a synthetic resin, and piperazine pyrophosphate by adding A method for obtaining high-purity piperazine pyrophosphate by dehydrating and condensing piperazine diphosphate obtained by reacting phosphoric acid and piperazine at low cost. Background technique [0002] In recent years, piperazine pyrophosphate has attracted attention because it exerts an excellent effect as one component of a flame retardant composition added to a synthetic resin. Many proposals have been made regarding the production method of this piperazine pyrophosphate. [0003] For example, Patent Document 1 discloses a method in which piperazine hydrochloride and sodium pyrophosphate are reacted in an aqueous solution to o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D295/02C08K5/51C09K21/12
CPCC07D295/02C09K21/12C07F9/645C07F9/6509
Inventor 木村凌治村濑久长滨胜神本哲男中野慎司
Owner ADEKA CORP
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