Preparation method for solvent-based lignin-cyanamide derivative flame retardant

A lignin and solvent-based technology, applied in the field of new material development, can solve the problems of flammability, limited use range and safety of polymer materials, and achieve excellent flame retardancy, benefit to low-carbon economy, and high purity Effect

Active Publication Date: 2011-11-23
FUZHOU UNIVERSITY
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Problems solved by technology

However, while enjoying the unique advantages of polymer materials, we are also facing new c

Method used

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  • Preparation method for solvent-based lignin-cyanamide derivative flame retardant
  • Preparation method for solvent-based lignin-cyanamide derivative flame retardant

Examples

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Example Embodiment

[0037] Example 1. Preparation of enzymatically hydrolyzed lignin-melamine derivative flame retardant

[0038] Add 10g of enzymatic hydrolyzed lignin and 100mL of 1.5% sodium hydroxide by weight to a 500mL three-necked flask with stirring and temperature control, stir to dissolve, and then add 15mL of 37% formaldehyde solution and heat and stir at 85℃. React for 1.5h. Then add 10g of cyanamide to the reaction vessel, stir at 80℃, and when the reaction is continued for 1.5h, add 10mL of 35% hydrochloric acid and make the solution pH 2-3, the lignin cyanamide derivative precipitates out, wash with water 3 After the second drying at 80°C for 2.0 hours, 18.50 g of lignin-cyanamide derivative flame retardant was obtained.

[0039]

Example Embodiment

[0040] Example 2: Preparation of high boiling alcohol lignin-melamine derivative flame retardant

[0041] Add 10g of high boiling alcohol lignin and 100mL of 1.0% sodium hydroxide by weight to a 500mL three-necked flask with stirring and temperature control. Stir to dissolve, then add 20mL of 37% formaldehyde solution and heat and stir at 85℃. Reaction at temperature for 1.5h. Then add 10g of melamine into the reaction vessel, stir at 80℃, and continue the reaction for 2.0h, add 10mL of 35% hydrochloric acid and make the solution pH 2-3, the lignin cyanamide derivative precipitates out, wash with water 3 times After drying at 80°C for 2.0 hours, 19.80 g of high boiling alcohol lignin-melamine derivative flame retardant was obtained.

[0042]

Example Embodiment

[0043] Example 3. Preparation of enzymatically hydrolyzed lignin-dicyanamide derivative flame retardant

[0044] To a 500mL three-necked flask with stirring and temperature control, add 10g of enzymatic hydrolyzed lignin and 100mL of 0.5-3.0% sodium hydroxide by weight, stir to dissolve, then add 20mL of 37% formaldehyde solution and heat and stir. React 2.0h at ℃. Then add 10g of melamine into the reaction vessel, stir at 90℃, and continue the reaction for 1.5h, add 10mL of 35% hydrochloric acid and make the solution pH 2-3, enzymatically hydrolyze the lignin-dimeric cyanamide derivative to precipitate After precipitation, washed with water three times and dried at 80°C for 2.0 hours to obtain 16.75 g of enzymatically hydrolyzed lignin-dimeric cyanamide derivative flame retardant.

[0045]

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Abstract

The invention relates to a preparation method for a solvent-based lignin-cyanamide derivative flame retardant. The method is characterized in that: after being subjected to a hydroxymethylation reaction, solvent-based lignin is subjected to a condensation polymerization with cyanamide and urea to prepare the solvent-based lignin-cyanamide derivative flame retardant. The solvent-based lignin-cyanamide derivative flame retardant has characteristics of high performance, halogen free, low cost, simple preparation method, and good flame-retardant effect, and can be widely applicable for the modified fields of polymers such as rubber, plastic and the like, and has good economic benefit and social benefit.

Description

technical field [0001] The invention belongs to the field of new material development, and more specifically relates to a method for preparing a new biomass material—solvent-type lignin-cyanamide derivative flame retardant. Background technique [0002] With the continuous development of polymer science, the three major polymer materials of plastic, rubber and fiber have been widely used in life. However, while enjoying the unique advantages of polymer materials, we are also facing new challenges. The flammability of polymer materials greatly limits the scope and safety of their use. According to statistics, about 10,000 people die in various fires every year in Europe and the United States. The direct economic loss caused by these fires is about 0.2% of the GDP of the region, and the indirect economic loss even reaches 1% of the GDP. Among these fires, about 40% are inseparable from polymer materials. It can be seen that polymer materials have become an important cause of...

Claims

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Application Information

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IPC IPC(8): C08H6/00C08L97/02C08H7/00
Inventor 程贤甦
Owner FUZHOU UNIVERSITY
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