Leather flame-retardant amino resin tanning agent and its preparation method

Abstract

The invention provides a leather fire retardant amine resin tanning agent and its preparing method, colorless or light brown in appearance, and obtained by a series of chemical methods of hydrolysis, amination, hydroxymethylation, sulphonation, neutralization, etc. It can make the leather have excellent tanned and re-tanned filling property, and gives the leather a good fireproof and fire-retardant function, and it is a high-efficiency, low-smoke, good-durability, good compatibility with leather high molecules, fire-retardant, multifunctional amine resin tanning agent.

Description

1. Technical field

[0001] The invention belongs to the technical field of leather chemical materials, and in particular relates to a flame-retardant amino resin tanning agent for leather and a preparation method thereof. 2. Background technology

[0002] Because of its comfortable, durable and noble quality, leather is not only widely used as high-end clothing and luggage materials, but also used in aircraft, automobiles, cabin interior decoration and seat cushions, hotels, high-rise building interior decoration, office furniture and other fields. However, leather materials used in these fields require a certain degree of flame retardancy. For leather materials to be flame retardant, the key is to have flame retardant materials suitable for leather. However, there are very few researches and developments on flame-retardant technology and flame-retardant materials for leather in my country, especially for leather-specific flame-retardant materials that are highly efficient,...

Examples

Embodiment 1

[0039]Add 25g of pentaerythritol diphosphoryl chloride and 300g of water into a reaction kettle with a stirrer, a thermometer and a reflux condenser, stir and heat up to 100°C, and react for 2 hours; cool down to 50°C, add 6g of dicyandiamide and 8g of melamine , 2g of urea, after fully stirring and dissolving, heat up to 80°C, and react for 2 hours; cool down to 50°C, add 29g of formaldehyde with a concentration of 37%, adjust the pH to 8 with 10% sodium hydroxide solution, and then slowly heat up to 80°C ℃, continue to react for 2 hours; cool down to 60°C, add 18g of sodium bisulfite, heat up to 80°C, stir for 2 hours; cool down to 50°C, add 4g of borax, 4g of triethanolamine, stir for 1 hour, add Adjust the pH to 8 with 10% sodium hydroxide solution to obtain a flame-retardant amino resin tanning agent for leather.

Embodiment 2

[0041] Add 30g of pentaerythritol diphosphoryl chloride and 280g of water into a reaction kettle with a stirrer, a thermometer and a reflux condenser, stir and heat up to 90°C, and react for 3 hours; cool down to 54°C, add 7g of dicyandiamide and 15g of melamine After fully stirring and dissolving, heat up to 80°C and react for 2 hours; cool down to 50°C, add 35g of formaldehyde with a concentration of 37%, adjust the pH to 8-9 with 10% sodium hydroxide solution, and then slowly heat up to 75°C , continue to react for 1.5 hours; cool to 60°C, add 22g of sodium bisulfite, heat up to 90°C, stir for 2 hours; cool to 50°C, add borax 3g, diethanolamine 3g, stir for 1 hour, add 10% Adjust the pH of the concentrated sodium hydroxide solution to 8-9 to obtain a flame-retardant amino resin tanning agent for leather.

Embodiment 3

[0043] Add 45 g of pentaerythritol diphosphoryl chloride and 300 g of water into a reaction kettle with a stirrer, a thermometer, and a reflux condenser, stir and heat up to 95° C., and react for 2 hours; cool down to 60° C., add 5 g of urea, 30 g of melamine, and fully After stirring and dissolving, heat up to 90°C and react for 3 hours; cool down to 40°C, add 50g of 37% formaldehyde, adjust the pH value to 8-9 with 10% sodium hydroxide solution, and then slowly heat up to 80°C , continue to react for 1 hour; cool down to 60°C. Add 35g of sodium bisulfite, heat up to 90°C and stir for 1 hour; cool down to 50°C, add 8g of borax and 8g of ethanolamine, stir for 2 hours, then add 10% sodium hydroxide solution to adjust the pH value to 8~ 9. Obtain a flame-retardant amino resin tanning agent for leather.

1. Technical field

[0001] The invention belongs to the technical field of leather chemical materials, and in particular relates to a flame-retardant amino resin tanning agent for leather and a preparation method thereof. 2. Background technology

[0002] Because of its comfortable, durable and noble quality, leather is not only widely used as high-end clothing and luggage materials, but also used in aircraft, automobiles, cabin interior decoration and seat cushions, hotels, high-rise building interior decoration, office furniture and other fields. However, leather materials used in these fields require a certain degree of flame retardancy. For leather materials to be flame retardant, the key is to have flame retardant materials suitable for leather. However, there are very few researches and developments on flame-retardant technology and flame-retardant materials for leather in my country, especially for leather-specific flame-retardant materials that are highly efficient,...

Examples

Embodiment 1

[0039]Add 25g of pentaerythritol diphosphoryl chloride and 300g of water into a reaction kettle with a stirrer, a thermometer and a reflux condenser, stir and heat up to 100°C, and react for 2 hours; cool down to 50°C, add 6g of dicyandiamide and 8g of melamine , 2g of urea, after fully stirring and dissolving, heat up to 80°C, and react for 2 hours; cool down to 50°C, add 29g of formaldehyde with a concentration of 37%, adjust the pH to 8 with 10% sodium hydroxide solution, and then slowly heat up to 80°C ℃, continue to react for 2 hours; cool down to 60°C, add 18g of sodium bisulfite, heat up to 80°C, stir for 2 hours; cool down to 50°C, add 4g of borax, 4g of triethanolamine, stir for 1 hour, add Adjust the pH to 8 with 10% sodium hydroxide solution to obtain a flame-retardant amino resin tanning agent for leather.

Embodiment 2

[0041] Add 30g of pentaerythritol diphosphoryl chloride and 280g of water into a reaction kettle with a stirrer, a thermometer and a reflux condenser, stir and heat up to 90°C, and react for 3 hours; cool down to 54°C, add 7g of dicyandiamide and 15g of melamine After fully stirring and dissolving, heat up to 80°C and react for 2 hours; cool down to 50°C, add 35g of formaldehyde with a concentration of 37%, adjust the pH to 8-9 with 10% sodium hydroxide solution, and then slowly heat up to 75°C , continue to react for 1.5 hours; cool to 60°C, add 22g of sodium bisulfite, heat up to 90°C, stir for 2 hours; cool to 50°C, add borax 3g, diethanolamine 3g, stir for 1 hour, add 10% Adjust the pH of the concentrated sodium hydroxide solution to 8-9 to obtain a flame-retardant amino resin tanning agent for leather.

Embodiment 3

[0043] Add 45 g of pentaerythritol diphosphoryl chloride and 300 g of water into a reaction kettle with a stirrer, a thermometer, and a reflux condenser, stir and heat up to 95° C., and react for 2 hours; cool down to 60° C., add 5 g of urea, 30 g of melamine, and fully After stirring and dissolving, heat up to 90°C and react for 3 hours; cool down to 40°C, add 50g of 37% formaldehyde, adjust the pH value to 8-9 with 10% sodium hydroxide solution, and then slowly heat up to 80°C , continue to react for 1 hour; cool down to 60°C. Add 35g of sodium bisulfite, heat up to 90°C and stir for 1 hour; cool down to 50°C, add 8g of borax and 8g of ethanolamine, stir for 2 hours, then add 10% sodium hydroxide solution to adjust the pH value to 8~ 9. Obtain a flame-retardant amino resin tanning agent for leather.

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