Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation of pentaerythritol diphosphonate melamine salt

The technology of pentaerythritol bisphosphate melamine salt and bisphosphate melamine salt is applied in the fields of intumescent flame retardant preparation and flame retardant preparation, and can solve the problems of needing organic solvents, low synthesis yield and high product cost, and achieves improved Reaction yield, good flame retardancy and good compatibility

Inactive Publication Date: 2008-11-12
NO 53 RES INST OF CHINA NORTH IND GRP +1
View PDF1 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The present invention aims at the deficiencies of the prior art, and provides a method for preparing a phosphorus-nitrogen series intumescent flame retardant pentaerythritol diphosphate melamine salt, so as to overcome the low synthesis yield, long reaction time, need for organic solvents, and melamine salts existing in the prior art. high product cost

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation of pentaerythritol diphosphonate melamine salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 4.3g Na 2 CO 3 , 11.88g of pentaerythritol diphosphate diphosphoryl chloride, 10.08g of melamine, and 80mL of water were added to a three-neck flask with a stirrer, condenser, and thermometer, heated to reflux, stirred for 10 minutes, stopped the reaction, cooled to room temperature, filtered, and washed with water The product was filtered four times until there was no chloride ion in the filtrate, and dried to obtain 18.8 g of a white solid with a yield of 91.8%.

Embodiment 2

[0030] Take 6.0g of triethanolamine, 5.94g of pentaerythritol diphosphate diphosphoryl chloride, 4.91g of melamine, and 40mL of water into a three-necked flask equipped with a stirrer, condenser, and thermometer, heat to 80°C, stir for 30 minutes, stop the reaction, and cool to Filter at room temperature, wash the filtered product with water six times until there is no chloride ion in the filtrate, and dry to obtain 9.0 g of white solid, with a yield of 89.0%.

Embodiment 3

[0032] Take 12mL of ammonia water, 29.7g of pentaerythritol diphosphate diphosphoryl chloride, 25.2g of melamine, and 250mL of water into a three-necked flask equipped with a stirrer, condenser, and thermometer, heat to 60°C, stir for 60 minutes, stop the reaction, and cool to room temperature. Filter, wash with water five times until there is no chloride ion in the filtrate, add the filtered product to 150mL 1wt% sodium dodecylbenzenesulfonate aqueous solution, stir at 50°C for 30min, cool to room temperature, filter, and dry to obtain 46.5g of white solid, product The rate is 90.8%.

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
Login to View More

PUM

PropertyMeasurementUnit
decomposition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for making pentaerythritol diphosphonate melamine salt, belonging to the synthesis technical field. The making process at least comprises two steps, i.e. synthesis and post treatment. Pentaerythritol diphosphonate diphosphoryl chloride, reaction accelerant, melamine and water are reacted at a temperature higher than 60 DEG C, and then are made into pentaerythritol diphosphonate melamine salt through cooling, scrubbing, filtration and drying. The pentaerythritol diphosphonate melamine salt made by the method has excellent compatibility with polymer and outstanding flame retardant property, and belongs to nontoxic, low-smoke and efficient environment-friendly fire retardant. Moreover, the method can effectively reduce reaction temperature and increase reaction yield without generating organic pollution along with simple process, high production efficiency and low energy consumption.

Description

1. Technical field [0001] The invention belongs to the technical field of synthesis and relates to the preparation technology of flame retardants, in particular to the preparation technology of intumescent flame retardants. 2. Background technology [0002] Phosphorus-nitrogen series intumescent flame retardants do not contain halogen, and mainly consist of phosphorus, nitrogen, and carbon. When heated, a P-N synergistic flame-retardant effect can occur, forming a uniform and dense carbon foam layer, which is heat-insulating, oxygen-insulating, and smoke-suppressing. , and can prevent the generation of molten droplets, has a good flame retardant performance, in line with the current development trend of flame retardants requiring less smoke and low toxicity. [0003] Monomer intumescent flame retardants combine the acid source, carbon source and gas source that make up the mixed intumescent flame retardant into one molecule, and fundamentally solve the problem of the mutual ...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/6574C07D251/54C09K21/12
Inventor 邱桂花于名讯姜兴三
Owner NO 53 RES INST OF CHINA NORTH IND GRP