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Preparation method of flame retardant canvas immersion solution

A technology of flame retardant canvas and impregnating liquid, which is applied in the direction of flame retardant fibers, fiber types, textiles and paper making, etc., can solve the problems of easy falling off of surface treatment agents, affecting flame retardant performance, falling off flame retardant materials, etc., and achieves easy drying. The effect of dry film formation, improving production efficiency, and increasing flame retardant properties

Pending Publication Date: 2019-09-06
WUHU SHZ IND FABRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for preparing a flame-retardant canvas dipping solution to solve the problem that the flame-retardant canvas in the prior art has low flame-retardant performance, complicated manufacturing methods, and the surface treatment agent is easy to fall off. and other technical issues;
However, when the existing inorganic flame retardants are mixed with emulsions, they are easily affected by light and undergo photocatalytic reactions, resulting in the surface of inorganic flame retardant materials being coated with organic materials. If the viscosity of flame retardants and emulsions is not good If it is used for a period of time, the flame retardant material will also fall off, affecting the flame retardant performance

Method used

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  • Preparation method of flame retardant canvas immersion solution

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Effect test

Embodiment 1

[0024] Embodiment 1 discloses a kind of preparation method of flame retardant canvas dipping liquid, comprises the following preparation steps:

[0025] Step 1, preparation of flame retardant

[0026] Weigh the o-phenylenediamine crystal and put it into the reaction kettle, and add dichloroethane solvent into the reaction kettle to stir and dissolve to obtain a solution, and then add an equimolar amount of phosphorus oxychloride liquid dropwise to the solution to carry out Polycondensation reaction, the reaction temperature is controlled at 55 ° C, and the reaction time is 5 hours; after the reaction is completed, filter to obtain a solid o-phenylenediamine phosphorus oxychloride, and put the o-phenylenediamine phosphorus oxychloride solid into a vacuum drying oven for drying treatment. The vacuum degree is 0.1MPa, and the oven temperature is 40°C. After drying, it is ready for use;

[0027] Step 2, preparation of impregnation glue

[0028] Pour PTFE emulsion, VAE emulsion, ...

Embodiment 2

[0034] Embodiment 2 discloses a kind of preparation method of flame retardant canvas dipping liquid, comprises the following preparation steps:

[0035] Step 1, preparation of flame retardant

[0036] Weigh the o-phenylenediamine crystal and put it into the reaction kettle, and add dichloroethane solvent into the reaction kettle to stir and dissolve to obtain a solution, and then add an equimolar amount of phosphorus oxychloride liquid dropwise to the solution to carry out Polycondensation reaction, the reaction temperature is controlled at 60°C, and the reaction time is 7 hours; after the reaction is completed, filter to obtain a solid o-phenylenediamine phosphorus oxychloride, and put the o-phenylenediamine phosphorus oxychloride solid into a vacuum drying oven for drying treatment. The vacuum degree is 0.5MPa, and the oven temperature is 40°C. After drying, it is ready for use;

[0037] Step 2, preparation of impregnation glue

[0038] Pour PTFE emulsion, VAE emulsion, hy...

Embodiment 3

[0044] Embodiment 3 discloses a kind of preparation method of flame retardant canvas dipping liquid, comprises the following preparation steps:

[0045] Step 1, preparation of flame retardant

[0046] Weigh the o-phenylenediamine crystal and put it into the reaction kettle, and add dichloroethane solvent into the reaction kettle to stir and dissolve to obtain a solution, and then add an equimolar amount of phosphorus oxychloride liquid dropwise to the solution to carry out Polycondensation reaction, the reaction temperature is controlled at 55°C, and the reaction time is 8 hours; after the reaction, filter to obtain a solid o-phenylenediamine phosphorus oxychloride, and put the o-phenylenediamine phosphorus oxychloride solid into a vacuum drying oven for drying treatment. The vacuum degree is 0.5MPa, and the oven temperature is 45°C. After drying, it is ready for use;

[0047] Step 2, preparation of impregnation glue

[0048] Pour PTFE emulsion, VAE emulsion, hydroxy silicon...

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Abstract

The invention discloses a preparation method of a flame retardant canvas immersion solution. The preparation method includes the steps of 1), weighing o-phenylenediamine crystal added with a dichloroethane solvent for stirring dissolution, then dropwise adding phosphorus oxychloride liquid with equal molar amount for condensation reaction and performing filtration to obtain o-phenylenediamine phosphate chloride solid for standby use; 2), pouring PTFE (polytetrafluoroethylene) emulsion, VAE emulsion, hydroxyl silicone oil and water into a stirring kettle in sequence for mixing and stirring, andadding emulsion auxiliaries and fillers to adjust the pH value; 3), placing dipping adhesive into an oven for vacuum treatment to keep the moisture content in the dipping adhesive not more than 1%; 4), adding anhydrous ethanol to an adhesive solution to adjust the adhesive, and adding obtained o-phenylenediamine phosphate chloride solid powder to the mixture by stirring to obtain a dipping solution. Technical problems such as the flame retardant performance of flame retardant canvases in the prior art is not high and the manufacturing mode is complex are improved, and the dipping solution obtained has the advantages of high flame retardancy, good applicability and the like.

Description

technical field [0001] The invention relates to the field of impregnating liquid for industrial cloth, in particular to a preparation method of impregnating liquid for flame-retardant canvas. Background technique [0002] The preparation of the existing flame-retardant canvas in China can be roughly divided into the following categories: 1. Using chloroprene latex or other halogenated hydrocarbons to replace the original butylpyridine latex for dipping to improve the flame-retardant performance of the canvas dipping layer, This kind of flame-retardant canvas has low adhesion to rubber, and it is prone to delamination in actual use; 2. Aramid fiber is used in the canvas structure, and the flame retardancy of aramid fiber is used to improve the overall flame retardancy of the canvas. This kind of flame-retardant canvas has problems such as high cost and poor bending resistance; 3. In the original canvas process, a flame retardant is added to the dipping solution to improve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/256D06M15/333D06M15/643D06M13/44D06M101/32D06M101/34
CPCD06M13/44D06M15/256D06M15/333D06M15/643D06M2101/32D06M2101/34D06M2200/30
Inventor 不公告发明人
Owner WUHU SHZ IND FABRIC
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