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Polyurethane hot melt adhesive for wood

A polyurethane hot-melt adhesive and wood technology, applied in the directions of adhesives, adhesive types, adhesive additives, etc., can solve the problems of long cooling time and poor initial adhesion, and achieve short cooling time and strong initial adhesion. , the effect of improving the crystallization performance

Inactive Publication Date: 2016-10-12
GUANGXI ZHONGCHANG RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a polyurethane hot melt adhesive for wood, which can solve the problems of poor initial adhesion and long cooling and setting time in the existing polyurethane hot melt adhesive for wood

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The polyurethane hot-melt adhesive for wood of the present embodiment is made of the following raw materials in parts by weight: 30 parts of polyneopentyl adipate-1,6-hexanediol ester diol, 0.5 part of dodecyl diacid , 8 parts of isocyanate, 3 parts of oxidized starch, 8 parts of calcium oxide, 8 parts of tackifier, 0.02 part of catalyst; among them, the tackifier is rosin glyceride, the catalyst is dibutyltin dilaurate, polyneopentyl adipate The average molecular mass of alcohol-1,6-hexanediol ester diol is 1900-3000. The preparation method adopts a conventional one-step method.

[0015] The initial peel strength of the polyurethane hot melt adhesive for wood obtained in this embodiment is 3.04N / 2.5cm, and the final peel strength is 31.55 N / 2.5cm; the amount of glue applied is 20g / m 2 The touch dry time is 30s.

Embodiment 2

[0017] The polyurethane hot-melt adhesive for wood of the present embodiment is made of the following raw materials in parts by weight: 42 parts of polyneopentyl adipate-1,6-hexanediol ester diol, 0.8 part of dodecyl diacid , 10 parts of isocyanate, 2.5 parts of oxidized starch, 7 parts of calcium oxide, 10 parts of tackifier, 0.08 part of catalyst; among them, the tackifier is rosin glyceride, the catalyst is dibutyltin dilaurate, polyneopentyl adipate The average molecular mass of alcohol-1,6-hexanediol ester diol is 1900-3000.

[0018] The initial peel strength of the polyurethane hot melt adhesive for wood obtained in this embodiment is 3.28N / 2.5cm, and the final peel strength is 32.69 N / 2.5cm; the amount of glue applied is 20g / m 2 The touch dry time is 22s.

Embodiment 3

[0020] The polyurethane hot-melt adhesive for wood of the present embodiment is made of the following raw materials in parts by weight: 50 parts of polyneopentyl adipate-1,6-hexanediol ester diol, 1 part of dodecyl diacid , 12 parts of isocyanate, 2 parts of oxidized starch, 5 parts of calcium oxide, 12 parts of tackifier, 0.1 part of catalyst; among them, the tackifier is rosin glyceride, the catalyst is dibutyltin dilaurate, polyneopentyl adipate The average molecular mass of alcohol-1,6-hexanediol ester diol is 1900-3000.

[0021] The initial peel strength of the polyurethane hot melt adhesive for wood obtained in this embodiment is 3.12N / 2.5cm, and the final peel strength is 32.02 N / 2.5cm; the amount of glue applied is 20g / m 2 The touch dry time is 25s.

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PUM

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Abstract

The invention discloses a polyurethane hot melt adhesive for wood, and relates to the technical field of hot melt adhesives. The polyurethane hot melt adhesive is prepared from, by weight, 30-50 parts of polyneopentylene-hexamethylene adipate glycol, 0.5-1 part of dodecanedioic acid, 8-12 parts of isocyanate, 2-3 parts of oxidized starch, 5-8 parts of calcium oxide, 8-12 parts of tackifier and 0.02-0.1 part of catalyst. According to the polyurethane hot melt adhesive for the wood, the problems that an existing polyurethane hot melt adhesive for the wood is poor in initial adhesion and long in cold setting time are solved.

Description

technical field [0001] The invention relates to the technical field of hot melt adhesives, in particular to a polyurethane hot melt adhesive for wood. Background technique [0002] Hot-melt adhesive is a kind of adhesive that is solid at room temperature, heats and melts into a liquid state, coats and wets the adherend, presses and cools, and can quickly complete the bonding. Compared with other types of hot melt adhesives, polyurethane hot melt adhesives with polyurethane as the binder have high elasticity, solvent resistance, wear resistance and other properties. Polyurethane hot melt adhesives include moisture-curable polyurethane hot-melt adhesives and thermoplastic polyurethane hot-melt adhesives. Moisture-curable polyurethane hot-melt adhesives are superior to thermoplastic polyurethane hot-melt adhesives and can be widely used in wood, electronics, metals, rubber, plastics, Bonding in industries such as automobile manufacturing, textiles, bookbinding, and shoemaking....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J167/02C09J103/10C09J11/06C09J11/04
CPCC09J167/02C08L2205/03C09J11/04C09J11/06
Inventor 黄桂彬蒋茵荣
Owner GUANGXI ZHONGCHANG RESIN
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