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Rice husk-based polyurethane adhesive containing rice husk-based polyol and preparation method thereof

A technology of polyurethane adhesive and polyol, which is applied in the field of rice husk-based polyurethane adhesive and its preparation, can solve the problems of non-biodegradability of polyurethane adhesive and high cost of polyurethane adhesive, and achieve good disposal Material resource utilization benefits, good environmental benefits, good film-forming effects

Active Publication Date: 2017-06-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, polyols, the main raw materials of polyurethane adhesives, come from fossil raw materials such as petroleum. With the depletion of fossil raw materials, the price of polyols continues to rise, resulting in an increase in the cost of polyurethane adhesives, and the prepared polyurethane adhesives do not have biodegradability

Method used

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  • Rice husk-based polyurethane adhesive containing rice husk-based polyol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A rice husk-based polyurethane adhesive, the rice husk-based polyurethane adhesive is prepared from the following raw materials in weight percentage: rice husk-based polyol 12.1%, polybutylene adipate (PBA1000) 42.8% , diphenylmethane diisocyanate 13.3%, dioxane 18.6%, small molecule chain extender trimethylolpropane 0.2%, dibutyltin dilaurate 0.1%, acetone 12.9%.

[0027] The preparation method of above-mentioned rice husk-based polyurethane adhesive, the steps are as follows:

[0028] (1) Add the pretreated rice husk powder to polyethylene glycol (PEG400) / n-octanol solvent system (mass The ratio is 8:2) to liquefy and degrade for 2 hours, add acetone to dissolve after cooling, add sodium hydroxide to adjust the pH to neutral, and distill under reduced pressure to remove acetone and water to obtain rice husk-based polyols.

[0029] (2) Vacuum dehydrate polyethylene adipate (PBA1000) at 105°C for 2 hours, and dissolve polybutylene adipate (PBA1000), dioxane-dissolved r...

Embodiment 2

[0032] A rice husk-based polyurethane adhesive, the rice husk-based polyurethane adhesive is prepared from the following raw materials in weight percent: rice husk-based polyol 7.9%, polybutylene adipate (PBA2000) 44.7% , toluene diisocyanate 10.2%, solvent dioxane 21.6%, small molecule chain extender 1,4-butanediol 0.2%, catalyst dibutyltin dilaurate 0.2%, acetone 15.2%.

[0033] The preparation method of above-mentioned rice husk-based polyurethane adhesive, the steps are as follows:

[0034] (1) Add the pretreated rice husk powder to the polyethylene glycol (PEG400) / n-octanol solvent system (mass The ratio is 7:3) to liquefy and degrade for 3 hours, add acetone to dissolve after cooling, add sodium hydroxide to adjust the pH to neutral, and distill under reduced pressure to remove acetone and water to obtain rice husk-based polyols.

[0035] (2) Vacuum dehydrate polybutylene adipate (PBA2000) at 105°C for 2 hours, and dissolve polybutylene adipate (PBA2000), rice husk-base...

Embodiment 3

[0038] A rice husk-based polyurethane adhesive, the rice husk-based polyurethane adhesive is prepared from the following raw materials in weight percentage: rice husk-based polyol 9.8%, polybutylene adipate (PBA1000) 39.3% , isophorone diisocyanate 13.7%, solvent dioxane 20.45%, small molecule chain extender 1,4-butanediol 0.2%, catalyst dibutyltin dilaurate 0.15%, acetone 16.4%.

[0039] The preparation method of above-mentioned rice husk-based polyurethane adhesive, the steps are as follows:

[0040] (1) Add the pretreated rice husk powder to polyethylene glycol (PEG400) / n-octanol solvent system (mass The ratio is 9:1) for liquefaction and degradation for 2.5 hours, after cooling, add acetone to dissolve, add sodium hydroxide to adjust the pH to neutral, and distill under reduced pressure to remove acetone and water to obtain rice husk-based polyols.

[0041] (2) Dehydrate polyethylene adipate (PBA1000) under vacuum for 2 hours at 105°C, and dissolve polybutylene adipate (P...

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Abstract

The invention relates to the field of synthesizing polymer materials using biomass as a raw material, a rice husk-based polyurethane adhesive containing rice husk-based polyols and a preparation method thereof. First, rice husk powder is liquefied under certain conditions to prepare rice husks base polyol, then use rice hull-based polyol, polyester polyol and isocyanate as raw materials, use dioxane as solvent, prepare polyurethane prepolymer under the action of catalyst dibutyltin dilaurate, and then add small molecule chain extender A chain extension reaction is carried out to obtain a polyurethane adhesive emulsion. The invention makes full use of cheap, easy-to-obtain and renewable rice husk resources, alleviates the dependence on fossil resources, and has a simple operation process and is easy to control, and the prepared rice husk-based polyurethane adhesive emulsion has good film-forming properties and high solid content , high bonding strength, excellent mechanical properties, and has great market competitiveness.

Description

technical field [0001] The invention relates to a biomass-based adhesive, in particular to a rice-husk-based polyurethane adhesive containing rice-husk-based polyol and a preparation method thereof. Background technique [0002] With the continuous consumption of fossil resources such as oil and natural gas and the further aggravation of environmental pollution, finding an environmentally friendly and renewable new energy has become the main task of scientific research workers. The main components of biomass are cellulose, hemicellulose and lignin, and it is a unique renewable carbon source that can be converted into conventional solid, liquid and gaseous fuels. Polyols are one of the main raw materials for organic synthesis, mainly derived from derivatives of fossil resources. Biomass liquefaction under certain conditions can prepare biomass-based polyols with certain reactivity, thereby alleviating the dependence on fossil resources and broadening the way for the further ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08H8/00C09J175/06C08G18/66C08G18/64C08G18/42C08G18/10
Inventor 陈爽钟强刘会娥关宇商宝强
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)