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Flame-retardant finishing agent for cellulosic fibers as well as preparation method and application of flame-retardant finishing agent

A technology of cellulose fiber and flame-retardant finishing agent, which is applied in the direction of fiber treatment, plant fiber, flame-retardant fiber, etc., can solve the problem of non-washable flame-retardant finishing agent, and achieve reduced demand, good durability, and improved The effect of the degree of esterification blocking

Pending Publication Date: 2021-01-29
南京清研纤维科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, one of the objectives of the present invention is to provide a flame retardant finishing agent for cellulose fibers and its preparation method and application, so as to solve the problem that the cellulose fiber fabrics finished by flame retardants in the prior art will gradually release during use. formaldehyde, and the flame retardant finishing agent without formaldehyde is basically not washable

Method used

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  • Flame-retardant finishing agent for cellulosic fibers as well as preparation method and application of flame-retardant finishing agent
  • Flame-retardant finishing agent for cellulosic fibers as well as preparation method and application of flame-retardant finishing agent
  • Flame-retardant finishing agent for cellulosic fibers as well as preparation method and application of flame-retardant finishing agent

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preparation example Construction

[0037] See figure 1 , figure 1 Shown is a schematic flow chart of a method for preparing a flame-retardant finishing agent for cellulose fibers according to an embodiment of the present invention. The method for preparing a flame-retardant finishing agent for cellulose fibers includes the following steps:

[0038] Step S1, add triethylenetetramine, dimethyl phosphite, phosphorous acid and formaldehyde into the reactor in sequence, raise the temperature to 70°C, and react for 3 hours under magnetic stirring to obtain the reaction product triethylenetetramine hexamethylene tetraphosphonic acid Dimethyl ester diphosphonic acid; The above-mentioned reactor is for example a beaker;

[0039] Step S2, cooling the product obtained in step S1 to normal temperature, and slowly adding ammonia water to prepare a flame retardant of triethylenetetramine hexamethylene tetraphosphonate dimethyl ammonium diphosphonate; and

[0040] Step S3, adding a catalyst and water to the flame retardant ...

Embodiment 1

[0044] The cellulose fiber fabric after finishing in the present embodiment adopts following steps to make:

[0045] (1) Synthesis of flame retardant:

[0046] Put 100mL of triethylenetetramine, 246mL of dimethyl phosphite, 110g of phosphorous acid and 380mL of formaldehyde into a 2000mL beaker in turn, place the beaker in a water bath with a constant temperature heating magnetic stirrer, and raise the temperature to 70°C. React for 3 hours under magnetic stirring, then cool to normal temperature, slowly add ammonia water, adjust the pH of the solution to 5-6, and obtain triethylenetetraminehexamethylenetetraphosphonic acid dimethyl ammonium diphosphonate flame retardant solution.

[0047] (2) Preparation of flame retardant finishing agent:

[0048] Add water and dicyandiamide to the triethylenetetramine hexamethylene tetraphosphonate dimethyl ammonium diphosphonate flame retardant solution, and prepare 1000mL of flame retardant finishing agent at a temperature of 60°C. The com...

Embodiment 2

[0053] The cellulose fiber fabric after finishing in the present embodiment adopts following steps to make:

[0054] (1) Synthesis of flame retardant:

[0055] Put 50mL of triethylenetetramine, 123mL of dimethyl phosphite, 55g of phosphorous acid and 190mL of formaldehyde into a 1000mL beaker in turn, put a magnetic stirrer in the beaker, and place the beaker in a water bath with a constant temperature heating magnetic stirrer Medium; heat up to 70°C, react for 3 hours under magnetic stirring, then cool to room temperature, slowly add ammonia water, adjust the pH of the solution to 5-6, and obtain triethylenetetraaminehexamethylenetetraphosphonic acid dimethyl ammonium diphosphonate flame retardant agent solution.

[0056] (2) Preparation of flame retardant finishing agent:

[0057] Add water and dicyandiamide to the triethylenetetramine hexamethylene tetraphosphonate dimethyl ammonium diphosphonate flame retardant solution, and prepare 1000mL of flame retardant finishing ag...

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Abstract

The invention provides a flame-retardant finishing agent for cellulosic fibers as well as a preparation method and application of the flame-retardant finishing agent. The flame-retardant finishing agent for cellulosic fibers comprises the following components of a flame retardant, a catalyst and the balance of water, wherein the flame retardant is triethylene tetramine hexamethylene dimethyl tetraphosphate ammonium diphosphonate. The problems that in the prior art, cellulose fiber fabric finished by a flame retardant gradually releases formaldehyde in the using process, and a formaldehyde-freeflame-retardant finishing agent is basically not washable can be solved.

Description

technical field [0001] The invention relates to the technical field, in particular to a flame-retardant finishing agent for cellulose fibers and a preparation method and application thereof. Background technique [0002] Cellulose fibers such as cupro fibers, viscose fibers, cotton fibers and hemp fibers are widely used in the textile and garment industry. However, the limiting oxygen index of cellulose fibers is only 16% to 18%, which is extremely flammable and poses a serious fire hazard. Therefore, for many years, the research on flame-retardant finishing of cellulose fibers has been a research hotspot both at home and abroad. [0003] At present, there are mainly two kinds of flame retardants, Pyrovatex CP and Proban, in the market industrialized and durable flame retardant finishing agents for cellulose fibers. Pyrovatex CP flame retardant molecules have active nitrogen methylol groups produced by formaldehyde, which can react with cellulose fibers and graft on cellul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/288D06M101/06
CPCD06M13/288D06M2101/06D06M2200/30
Inventor 王舜张奇
Owner 南京清研纤维科技有限公司