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Reactive polyurethane hot melt adhesive for bonding aluminum plate and wood veneer and preparation method of reactive polyurethane hot melt adhesive

A polyurethane hot-melt adhesive and reactive technology, applied in the direction of polyurea/polyurethane adhesive, adhesive type, adhesive, etc., can solve the problems of affecting the bonding force, high crystallization shrinkage, and unstable bonding. Achieve the effect of improving work efficiency

Inactive Publication Date: 2020-09-15
BEIJING COMENS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of improving initial adhesion can increase the content of thermoplastic resin in polyurethane hot melt adhesive, but it will affect the later bonding force, and some thermoplastic resins have high crystallization shrinkage rate and unstable bonding

Method used

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  • Reactive polyurethane hot melt adhesive for bonding aluminum plate and wood veneer and preparation method of reactive polyurethane hot melt adhesive
  • Reactive polyurethane hot melt adhesive for bonding aluminum plate and wood veneer and preparation method of reactive polyurethane hot melt adhesive
  • Reactive polyurethane hot melt adhesive for bonding aluminum plate and wood veneer and preparation method of reactive polyurethane hot melt adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0031] (1) The isocyanate is one or more of diphenylmethane-4,4-diisocyanate, isophorone diisocyanate, toluene diisocyanate, and hexamethylene diisocyanate.

[0032] (2) The aliphatic polyester diol is polyadipate-1,6-hexanediol, polyadipate-neopentyl glycol, polyadipate-1,4 - Butylene glycol ester diol, polyadipate-diethylene glycol ester diol, polyadipate-diethylene glycol-neopentyl glycol ester diol, polyadipate-hexanediol-neopentyl glycol One or more of ester diols.

[0033] (3) The polyether diol is mainly composed of propylene oxide, and its relative molecular weight is 1000-5000.

[0034] (4) The aromatic polyester diol is polydiethylene glycol phthalate, polyphthalate-1,6-hexanediol, polyphthalic acid Neopentyl glycol ester diol, polyneopentyl glycol phthalate diol, polyterephthalate-neopentyl glycol ester diol, polyphthalic anhydride-neopentyl glycol ester diol, polyphthalic anhydride-diol One or more of ethylene glycol ester diol and polyneopentyl isophthalate dio...

Embodiment 1

[0052] A reactive polyurethane hot-melt adhesive bonded to an aluminum plate and a veneer, the preparation method of which may comprise the following steps:

[0053] Step 1. Weigh 12kg of diphenylmethane-4,4-diisocyanate, 20kg of polyadipate-neopentyl glycol ester diol, 10kg of polyadipate-1,6-hexanediol ester diol, polyether Diol 20kg, polyneopentyl glycol phthalate diol 9kg, thermoplastic acrylic resin 8Kg, antioxidant 1010 0.05kg, phosphoric acid 0.01kg, dibutyltin dilaurate 0.05kg, silane coupling agent KH-550 0.5kg. The number average molecular weight of the polyether glycol that the embodiment of the present invention uses is 2000, and the number average molecular weight of polyadipate-neopentyl glycol ester diol is 2500, and the number average molecular weight of polyphthalate neopentyl glycol ester diol The number average molecular weight is 5500, and the number average molecular weight of polyadipate-1,6-hexanediol ester diol is 2000.

[0054] Step 2, polyadipate-ne...

Embodiment 2

[0059] A reactive polyurethane hot-melt adhesive bonded to an aluminum plate and a veneer, the preparation method of which may comprise the following steps:

[0060] Step 1, weigh diphenylmethane-4,4-diisocyanate 10kg, polyadipate-diethylene glycol-neopentyl glycol ester diol 18kg, polyadipate-1,4-butylene glycol ester diol 7kg, polyether diol 25kg, polyphthalic anhydride-diethylene glycol ester diol 10kg, thermoplastic acrylic resin 7Kg, antioxidant 1035 0.05kg, phosphoric acid and benzoic acid mixture 0.01kg, dimorpholine triethyl ether 0.1kg , Silane coupling agent A-172 0.5kg. The number average molecular weight of the polyether glycol that the embodiment of the present invention uses is 3000, polyadipate-diethylene glycol-neopentyl glycol ester diol (the mol ratio of diethylene glycol and neopentyl glycol is 1:2 ) has a number average molecular weight of 3500, polyadipate-1,4-butylene glycol ester diol has a number average molecular weight of 3000, polyphthalic anhydride...

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Abstract

The invention discloses a reactive polyurethane hot melt adhesive for bonding an aluminum plate and a wood veneer and a preparation method of the reactive polyurethane hot melt adhesive. The reactivepolyurethane hot melt adhesive is prepared from the following raw materials in parts by weight: 10-35 parts of isocyanate, 10-70 parts of aliphatic polyester diol, 20-50 parts of polyether diol, 5-20parts of aromatic polyester diol, 5-15 parts of thermoplastic resin, 0.05-0.5 part of an antioxidant, 0.01-0.1 part of a stabilizer, 0.05-0.5 part of a catalyst and 0.1-5 parts of an adhesion promoter. The adhesive has high initial adhesion and good later adhesion, can meet the adhesion requirement of an aluminum plate and a wood veneer, and can improve the working efficiency in the adhesion process.

Description

technical field [0001] The invention relates to the field of chemical adhesives, in particular to a reactive polyurethane hot-melt adhesive for bonding aluminum plates and veneers and a preparation method thereof. Background technique [0002] Moisture-curing polyurethane (PUR) hot-melt adhesive has the characteristics of both hot-melt adhesives and reactive adhesives. Compared with traditional hot-melt adhesives, the application temperature is lower. Substrates containing active hydrogen, such as wood, ceramics, fabrics, etc., and smooth substrates such as metals, glass, plastics, rubber, etc. exhibit excellent bonding properties. At present, polyurethane hot melt adhesives are widely used in various industries and become one of the fastest-growing adhesive varieties. With excellent physical and chemical properties and environmental performance, reactive polyurethane hot-melt adhesives are rapidly replacing the previous solvent-based and water-based adhesives in woodworkin...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J175/08C09J133/04C09J11/06C09J11/04C08G18/42C08G18/48
CPCC08G18/4018C08G18/4202C08G18/4211C08G18/4213C08G18/425C08G18/4825C08K2003/329C09J11/04C09J11/06C09J175/06C09J175/08C08L33/04C08K5/1345C08K3/32C08K5/544
Inventor 易晨凤罗善国
Owner BEIJING COMENS NEW MATERIALS
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