A kind of preparation method of attapulgite modified lignin type polyurethane material

A technology of polyurethane material and attapulgite, which is applied in the field of preparation of attapulgite-modified lignin-type polyurethane material, can solve the problems of reducing the flexibility and elongation of polyurethane, achieve improved mechanical properties, low price, and avoid stress concentration Effect

Active Publication Date: 2018-10-26
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It mainly solves the problem that the existing method of using lignin or attapulgite modified polyurethane materials alone will reduce the flexibility and elongation of polyurethane

Method used

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  • A kind of preparation method of attapulgite modified lignin type polyurethane material
  • A kind of preparation method of attapulgite modified lignin type polyurethane material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of acid-treated attapulgite: Weigh 50g of the original attapulgite, add 250ml of distilled water containing 25ml of hydrochloric acid, stir at 50°C for 3 hours, filter, wash and dry, then grind into powder to obtain acid-treated attapulgite HAT.

[0032] (2) Weigh 6g of dry alcoholyzed lignin and dissolve it in 100ml of dimethylformamide (DMF), then add 100g of polyethylene glycol PEG 1000 and stir at 60°C for 30min to make it fully mixed. Then add 2g of HAT to compound to obtain polyol.

[0033] (3) The compounded polyol was uniformly mixed with 1.5 g of dibutyltin dilaurate, 2.2 g of triethylenediamine, and 10.6 g of trimethylolpropane to obtain a mixed solution.

[0034] (4) Add a certain amount of toluene diisocyanate to the mixed solution in step (3), adjust the isocyanate index (n(-N°CO):n(-OH)) to 1:1.5, and react under closed stirring at 90°C for 30 minutes, After the reaction was complete, the obtained resin was added to deionized water contai...

Embodiment 2

[0036] (1) Preparation of acid-treated attapulgite: Weigh 50 g of the original attapulgite, add 250 ml of distilled water containing 25 ml of hydrochloric acid, stir at 60°C for 3 hours, filter, wash and dry, then grind into powder to obtain acid-treated attapulgite HAT.

[0037] (2) Weigh 15g of dry alkali lignin and dissolve it in 100ml of toluene, then add 100g of polycaprolactone diol and stir at 60°C for 30min to make it fully mixed. Then add 6g of HAT, compound to obtain complex polyol.

[0038] (3) The compounded polyol was uniformly mixed with 1.6 g of stannous octoate, 2.4 g of triethylenediamine, and 11.5 g of dipropylene glycol to obtain a mixed solution.

[0039] (4) Add a certain amount of diphenylmethane diisocyanate to the mixed solution in (3), adjust the isocyanate index (n(-NCO):n(-OH)) to 2:1, and react under closed stirring at 70°C for 60min After the reaction is complete, add deionized water containing NaOH to the obtained resin, and emulsify for 30 minu...

Embodiment 3

[0041] (1) Preparation of acid-treated attapulgite: Weigh 50 g of the original attapulgite, add 250 ml of distilled water containing 25 ml of hydrochloric acid, stir at 60°C for 3 hours, filter, wash and dry, then grind into powder to obtain acid-treated attapulgite HAT.

[0042] (2) Weigh 15g of dry acid lignin and dissolve it in 100ml of acetone, then add 100g of polyethylene adipate diol and stir at 60°C for 30min to make it fully mixed. Then add 30gHAT, and obtain compound polyol after dispersion.

[0043] (3) Mix the compound polyol with 1.6g of stannous octoate, 2.4g of triethylenediamine, and 11.5g of castor oil to obtain a mixed solution.

[0044] (4) Add a certain amount of xylylene diisocyanate to the mixed solution in (3), adjust the isocyanate index (n(-NCO):n(-OH)) to 2:1, and react under closed stirring at 90°C After 30 minutes, after the reaction is complete, add deionized water containing NaOH to the obtained resin, and emulsify for 30 minutes. The prepared ...

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Abstract

The invention relates to a preparation method of an attapulgite modified lignin type polyurethane material, belongs to the field of wood-based composites, and aims to provide a preparation method of a novel polyurethane material simple in process, low in production cost and easy in industrialization implementation. Lignin is dispersed and dissolved in an organic solvent, and is compounded with polyhydric alcohols and attapulgite to obtain compounded polyhydric alcohols, and then the compounded polyhydric alcohols are mixed with isocyanate, a chain extender and a catalyst to react, thus obtaining the attapulgite modified lignin type polyurethane material. The used attapulgite and lignin are compounded in the polyurethane material in a blending or copolymerization way; the attapulgite can improve the performance of the polyurethane material in two manners of micron filling and nano-reinforcing; the lignin can replace part of polyols to serve as a reaction main body and is subjected to copolymerization reaction with the isocyanate, thus improving the mechanical property of the polyurethane material.

Description

technical field [0001] The invention belongs to the field of new environmental protection materials, in particular to a preparation method of attapulgite-modified lignin-type polyurethane material. Background technique [0002] Polyurethane is an emerging organic polymer material, known as the "fifth largest plastic", and is widely used in many fields of the national economy because of its excellent performance. Products made of polyurethane resins include foamed plastics, elastomers, coatings, adhesives, fibers, synthetic leather, and paving materials. The product application fields involve light industry, chemical industry, electronics, textile, medical treatment, construction, building materials, automobile, national defense, aerospace, aviation, etc. The products and varieties are increasing year by year, occupying a very important position in the material industry. Therefore, all countries are competing to develop the polyurethane resin industry. [0003] Polyurethane...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/64C08G18/48C08G18/42C08G18/44C08K9/02C08K3/34C08J5/18C08L75/04
CPCC08G18/4081C08G18/4238C08G18/4277C08G18/4833C08G18/4845C08G18/4854C08G18/6492C08G18/6511C08G18/6517C08G18/6529C08G18/6547C08G18/664C08G18/6662C08G18/6674C08G18/6685C08G18/6696C08G2230/00C08J5/18C08J2375/04C08K3/346C08K9/02C08L2203/16
Inventor 曹云峰刘祝兰皮成忠
Owner NANJING FORESTRY UNIV
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