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Preparation method of adhesive for making board from straws

An adhesive and wheat straw technology, applied in the direction of adhesive, adhesive type, graft polymer adhesive, etc., can solve the problems of sticking, high cost, toxicity, etc., and achieve good water resistance and mechanical mechanics. Good performance and stability

Inactive Publication Date: 2013-12-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with commonly used adhesives, MDI adhesives have the advantages of short pressurization time, good water resistance and aging resistance of the adhesive layer, but the disadvantage is high cost. MDI adhesives are prone to sticking to the board when producing particle boards, are toxic, and require metering and monitoring. The pumping system must not be contaminated by water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 20g of diphenylmethane diisocyanate MDI, 10g of polyether polyol NJ-330 and 10g of acetone into a 500mL four-neck flask equipped with a stirrer, reflux condenser, thermometer and feeding device, stir well to dissolve it, Raise the temperature of the system to 65°C, add 0.02g of T-12 catalyst, raise the temperature of the system to 90°C, react for 1h and then cool down to 50°C, add 10g of hydroxypropyl methacrylate (HPMA) for capping, and stir for 3h , cooled to 35°C. Add 5 g of trifluorooctyl methacrylate monomer to the above system, raise the temperature to 80°C for reaction, add 0.05 g of azobisisobutyronitrile AIBN initiator, and react for 0.5 h. Obtain a special adhesive (MGJNJ-1) that can be used for crop straw board making.

Embodiment 2

[0022] Add 20g of diphenylmethane diisocyanate MDI, 20g of polyether polyol NJ-330 and 20g of acetone into a 500mL four-necked bottle equipped with a stirrer, reflux condenser, thermometer and feeding device, stir fully to dissolve it, Raise the temperature of the system to 65°C, add 0.03g of T-12 catalyst, raise the temperature of the system to 90°C, react for 3 hours and then cool down to 50°C, add 12g of hydroxypropyl methacrylate (HPMA) for capping, and stir for 3 hours , lower the temperature to 35°C, add 7.5g of dodecafluoroheptyl acrylate monomer to the above system, raise the temperature to 80°C for reaction, add 0.15g of azobisisobutyronitrile AIBN initiator, and react for 1h. Obtain special adhesive (MGJNJ-2) which can be used for crop straw board making.

Embodiment 3

[0024] Add 20g of diphenylmethane diisocyanate MDI, 30g of polyether polyol NJ-330 and 30g of acetone into a 500mL four-neck flask equipped with a stirrer, reflux condenser, thermometer and feeding device, stir fully to dissolve it, Raise the temperature of the system to 65°C, add 0.04g of T-12 catalyst, raise the temperature of the system to 90°C, react for 2.5h and then cool down to 50°C, add 14g of hydroxypropyl methacrylate (HPMA) for capping, and stir for 3h Afterwards, cool down to 35°C, add 10g of dodecafluoroheptyl methacrylate monomer to the above system, raise the temperature to 80°C for reaction, add 0.02g of azobisisobutyronitrile AIBN initiator, and react for 1.5h. Obtain a special adhesive (MGJNJ-3) that can be used to make boards from crop straw.

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PUM

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Abstract

The invention belongs to the technical field of preparation of adhesives, and relates to a preparation method of an adhesive for making a board from crop straws, which comprises the following steps: dissolving diphenylmethane diisocyanate and polyether glycol NJ-330 in acetone; and by using dibutyltin dilaurate as a catalyst, adding hydroxypropyl methacrylate to perform termination, and adding fluorine-containing acrylate monomer to react by using azodiisobutyronitrile as an initiator, thereby obtaining the adhesive. The adhesive prepared by the method provided by the invention is free of free formaldehyde monomer. The fluorine element is introduced into an isocyanate adhesive system; fluorine atoms with lower polarizability, strong electronegativity and small Van der Waals radius can be combined with carbon atoms to form a high-bond-energy C-F bond, and the main group -CF3 of the fluorocarbon compounds has extremely low surface energy, so that the adhesive has high stability; after the adhesive forms the film, the film has favorable water resistance and mechanical properties, has strong bonding action with the straws subjected to surface treatment; and the adhesive can be used for preparing an artificial straw board according to a common artificial fiber board production technique.

Description

technical field [0001] The invention belongs to the technical field of adhesive preparation, and relates to the preparation of adhesive, in particular to an adhesive preparation method which can be used for board making from crop straw. technical background [0002] As a by-product of agricultural production, wheat straw was first used to make grass-reinforced clay panels for building houses. In 1905, Germany used wheat straw and other crop straw raw materials to mix adhesives for board making research; from 1930 to 1940, the United States also conducted research on using such raw materials to manufacture insulating boards. In the mid-1940s, Britain began to make paper grass boards with straw and wheat straw, and this technology was once transferred to more than 20 countries in the world. In 1970, the United Nations Industrial Development Organization held a seminar with 13 countries participating in non-wood wood-based panels. The production and utilization of wood-based p...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/22C08G18/76C08G18/67C08G18/48C08G18/24C09J151/08B27N3/00
Inventor 邱凤仙杨冬亚徐吉成荣新山
Owner JIANGSU UNIV
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