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Method for preparing environmentally-friendly macromoleclar polymer and application

A high-molecular polymer and green technology, applied in polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve the problems of increased cost and high price of finished boards, achieve shortened reaction time, low raw material cost, The effect of increasing the added value of products

Inactive Publication Date: 2012-02-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, isocyanate has not been widely used in the wood industry. One of the main reasons is the high price. Although the amount is small, it still leads to an increase in the cost of the finished board.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Crushing and drying the recovered PET, reducing the water content to less than 0.5% by mass, sifting out sand, stones, metals and other solids; adding 100 kg of recovered and broken PET, 5 kg of pentaerythritol, and esterification catalyst tetra-titanate Butyl ester 0.5kg, and open agitator, be that the microwave radiation 4min of output power is 500W to make PET alcoholysis; Add pyromellitic dianhydride 10kg in the reactor, be the microwave radiation 4min of output power of 500W; Add 165 kg of ammonia aqueous solution in the kettle, adjust the pH to 8.0, and disperse the resin to obtain PET water-based polymer emulsion.

[0036] When used, the prepared PET water-based polymer emulsion and polymethyl polyphenylisocyanate are mixed at room temperature in a mass ratio of 100:4 to obtain a green high molecular polymer wood adhesive.

Embodiment 2

[0038] Crushing and drying the recovered PET, reducing the moisture to below 0.5% by mass, sieving out solids such as sand, stones, metals, etc.; adding 100 kg of recovered and broken PET, 7 kg of pentaerythritol, and titanic acid as an esterification catalyst to the reactor Tetrabutyl ester 0.8kg, and open stirrer, be that the microwave radiation 10min of 500W makes PET alcoholysis with output power; Add pyromellitic dianhydride 15kg in reactor, be the microwave radiation 8min of 500W with output power; Add 170 kg of ammonia aqueous solution to the reaction kettle, adjust the pH to 8.0, and disperse the resin to obtain PET water-based polymer emulsion.

[0039]When used, the prepared PET water-based polymer emulsion and polymethyl polyphenylisocyanate are mixed at room temperature in a mass ratio of 100:10 to obtain a green high molecular polymer wood adhesive.

Embodiment 3

[0041] Crushing and drying the recovered PET, reducing the moisture content to less than 0.5% by mass, sifting out sand, stones, metals and other solids; adding 100 kg of recovered and broken PET, 6 kg of pentaerythritol, and titanic acid as an esterification catalyst to the reactor Tetrabutyl ester 0.7kg, and open stirrer, be that the microwave radiation 6min of 500W makes PET alcoholysis with output power; Add pyromellitic dianhydride 13kg in reactor, be the microwave radiation 6min of 500W with output power; Add 168 kg of ammonia aqueous solution to the reaction kettle, adjust the pH to 8.0, and disperse the resin to obtain PET water-based polymer emulsion.

[0042] (5) When used, the prepared PET water-based polymer emulsion and polymethyl polyphenylisocyanate are mixed at room temperature in a mass ratio of 100:7 to obtain a green polymer wood adhesive.

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Abstract

The invention relates to a method for preparing an environmentally-friendly macromolecular polymer and application, which belong to the technical field of chemical adhesives. Polyethylene terephthalate (PET) aqueous polymer emulsion is prepared by recycling PET, pentaerythritol, tetrabutyl titanate, pyromellitic acid dianhydride and aqueous solution of ammonia. When in use, the prepared PET aqueous polymer emulsion and polymethylene polyphenyl isocyanate are mixed at room temperature to obtain the environmentally-friendly macromolecular polymer. The environmentally-friendly macromolecular polymer is used for sticking wood.

Description

technical field [0001] The invention relates to a preparation method and application of a green high molecular polymer, in particular to a preparation method and application of a green high molecular polymer wood adhesive, and belongs to the technical field of chemical adhesives. Background technique [0002] All organic compounds containing highly reactive isocyanate groups (-NCO) in their molecules are collectively referred to as isocyanates. Isocyanate has been used since World War II, and was quickly hailed as "glue that can bond any object". Over the past 50 years, the research and application of isocyanate in many fields and composite materials for different purposes has made great progress. [0003] In 1951, Deppe and Ernst were the first to use isocyanate to glue particleboard. In 1957, Germany produced the first batch of isocyanate particleboard. At present, isocyanate has become one of the more and more important thermosetting adhesives in the wood industry. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/42C09J175/06
Inventor 王志玲张书香杨秀利
Owner UNIV OF JINAN