CN1080308A

CN1080308A - Anti-coagulating high-strength adhesive and preparation method thereof

Info

Publication number: CN1080308A
Application number: CN 92104673
Authority: CN
Inventors: 韩立泉
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-17
Filing date: 1992-06-17
Publication date: 1994-01-05

Abstract

The present invention discloses a kind of anti-coagulating high-strength adhesive and preparation method thereof, is used for matrix materials such as bonding paper and woven dacron, glass fibre or non-woven fabrics.It is characterized in that in the urea of the PVA of 12～14wt% and 9～12wt%, adding the water of 69.5～72wt%, stir with 40～50r/min at normal temperatures, under 92 ℃～98 ℃, stirred 2～3 hours again with 60～70r/min, add the CMC of 0.5～1wt% and the polyvalent alcohol of 4～5wt% down at 80 ℃～90 ℃, and with 40～50r/min stirring 30～40 minutes, discharging at normal temperatures.Its advantage is that raw materials cost is low, and production technique is simple, safety, bonding powerful high, the anti-gelling of tackiness agent.

Description

Anti-coagulating high-strength adhesive and preparation method thereof

The present invention relates to a kind of water-soluble ethylene based adhesive, is a kind of anti-coagulating high-strength adhesive and preparation method thereof specifically.

In the prior art, application number is that 92104094.6 Chinese patent application discloses a kind of high strong polyviny alcohol binder and preparation method thereof, this tackiness agent is to be major ingredient with polyvinyl alcohol (PVA), makes coupling agent with the oxide compound of water-soluble boron, is that solvent is mixed with water.Though it has bonding powerful high, water-fast, heat-resisting, anticorrosion, the modulus of elasticity height, advantages such as Nonpoisonous, non-environmental-pollution, but because it is to be major ingredient with PVA, contain a large amount of hydrophilic hydroxyl groups (OH) at the PVA macromole, after PVA is water-soluble, water also is a kind of polar molecule, open between hydroxyl and be divided into interior hydrogen bond, cause intermolecular attraction to increase, produce macromolecular concluding and gelling occurs, so the as easy as rolling off a log skinning in this tackiness agent glue surface especially reduces with temperature, increase storage period, solid content increases, and colloid condense becomes the elasticity bulk, has lost mobile and wetting property and can't using.The gelling phenomenon is the technical barrier that the PVA water-sol does not give solution for a long time.Heating or insulation are stored when overcoming the agglomerative way and being to use, and promptly this tackiness agent must remain under the 60+5 ℃ of condition and could normally use, but this gives and uses operation to bring certain difficulty.Overcome the gelling phenomenon, do not lose its advantage again, also can adopt ways such as vinyl acetate between to for plastic, acrylamide copolymerization, grafting, but its cost increases a lot, per ton up to more than 1.4 ten thousand yuan, and because they are inflammable explosive article, production process is dangerous, and human body and environment are caused potential danger.

The purpose of this invention is to provide that a kind of raw materials cost is low, production technique is simple and safe, the tackiness agent of anti-coagulating action, high-tenacity and preparation method thereof.

The present invention is achieved in that a kind of is major ingredient with polyvinyl alcohol (PVA), with water is the anti-coagulating high-strength adhesive of solvent, wherein major ingredient-polyvinyl alcohol (PVA) is 12～14wt%, dispersion stabilizer-urea is 9～12wt%, tackifier-Xylo-Mucine (CMC) is 0.5～1wt%, softening agent-polyvalent alcohol is 4～5wt%, and water is 69.5%～72wt%.Polyvalent alcohol is glycerol (glycerine) or ethylene glycol.

A kind of preparation method of anti-coagulating high-strength adhesive of component as mentioned above is: the water that adds 69.5～72wt% in the mixture of the urea of the polyvinyl alcohol (PVA) of 12～14wt% and 9～12wt%, stir with 40～50 rev/mins of speed at normal temperatures, under 92 ℃～98 ℃ temperature, stirred 2～3 hours with 60～70 rev/mins of speed, under 80 ℃～90 ℃ temperature, add the Xylo-Mucine (CMC) of 0.5～1wt% and the polyvalent alcohol of 4～5wt%, stirred 30～40 minutes discharging at normal temperatures with 40～50 rev/mins of speed.

It is that bonding brute force is good, and good elasticity is arranged, and is nontoxic, tasteless, nuisanceless because PVA glued membrane force of cohesion is big as major ingredient that the present invention uses PVA, and water just can dissolve, and production operation makes things convenient for, and easily purchase, cost is low.Adding urea is to introduce hydrophilic amino in the PVA macromole, with the quantity of hydrogen bond in reducing, reduces force of cohesion between macromole, slows down that PVA is macromolecular to be concluded, and colloidal viscosity is reduced, thereby stops and the generation of delay gelatinizing, so urea plays the dispersion stabilizer effect; Urea can increase colloidal flowability and wetting property on the other hand, improves processing performance, therefore tackiness agent can be used at normal temperatures; Urea also has certain waterproof effect, improves the water-repellancy of matrix material.Ooze the tackifier CMC of amalgamation determined number again, its tackify effect is remarkable, even it is very little to use ratio with, mutual solubility is good, and is not stratified during storage; CMC also has certain thermotolerance, can reduce colloidal surface brute force, postpones gelling, extends using period; The CMC raw material is cheap, and is easy to use, pollution-free.Polyvalent alcohol mainly plays the effect of softening agent, and its moisture absorption or good water-retaining property make the glued membrane deliquescing, but consumption is too much unsuitable, prevents not anti-doing and the increase cost.Remarkable advantage of the present invention is: the anti-coagulating high-strength adhesive stable viscosity, and working life is long, can realize gluing under the normal temperature; The colloid wetting property is mobile high, and the glued membrane softness can improve bonding quality, and the initial viscosity height is suitable for the mechanize gluing, can ambient cure; Prescription is simple, and is easy to make, only needs a reactor and a small amount of testing instruments just can produce, and processing condition are low, easy handling, and cost is low, and 1000～1200 yuan of per ton need are less than 1/10 of copolymerized adhesive price.

Hydrophilic materials such as the bonding paper of anti-coagulating high-strength adhesive, timber, fabric, WALL CLOTH or cement can obtain the ideal effect, to some hydrophobic materials, also satisfied adhesive effect can be arranged as PVC, terylene etc.Can be widely used in paper/the wash compound sticking of screen cloth, paper/polyvinyl screen cloth, paper/glass fibre or paper/multiple materials such as pool.

Embodiment:

1. be that paper/woven dacron is compound by sticking material, terylene is a hydrophobic material, and surface energy is very low, and is difficult bonding, and therefore the content of PVA wants high in the prescription.

The water that in 14kgPVA and 11kg urea, adds 69.5kg, stir with 40～50r/min speed at normal temperatures, under 95 ± 3 ℃ of temperature, stirred 2.5 hours with 60～70r/min speed, under 80 ℃～90 ℃ temperature, add the CMC of 0.5kg and the glycerine of 5kg, and with 40～50r/min speed stirring 30～40 minutes, discharging at normal temperatures obtains the 100kg anti-coagulating high-strength adhesive.

2. be that paper/glass fibre is compound by sticking material, paper is porous material and be easy to bondingly, and fiberglass surfacing is the space structure, and water easily soaks into, and is bonding easily than terylene, so contain the suitably reduction of PVA amount.

In 12kgPVA and 11kg urea, add entry 72kg, stir with 40～50r/min speed at normal temperatures, under 95 ± 3 ℃ of temperature, stirred 2.5 hours with 60～70r/min speed, under 80 ℃～90 ℃ temperature, add 1kgCMC and 4kg ethylene glycol, and with 40～50r/min speed stirring 40 minutes, discharging at normal temperatures obtains the 100kg anti-coagulating high-strength adhesive.

3. be paper/non-woven fabric compounded by sticking material, non-woven fabrics is mixed and made into by terylene, polyvinyl, and because of containing difficult sticking polyester material, so PVA content Jie is between above-mentioned two embodiment.

The water that in 13kgPVA and 11kg urea, adds 71kg, stir with 40～50r/min speed at normal temperatures, under 95 ± 3 ℃ of temperature, stirred 2.5 hours with 60～70r/min speed, under 80 ℃～90 ℃ temperature, add the CMC of 0.5kg and the glycerine of 4.5kg, and with 40～50r/min speed stirring 30～40 minutes, discharging at normal temperatures obtains the 100kg anti-coagulating high-strength adhesive.

Among the present invention, CMC also has two kinds of additions, and CMC and PVA and urea directly added when the first began, and this way is comparatively simple.Shortcoming is to make the very fast increase of adhesive capacity after CMC adds, heat passage slowing down, the dissolution time of delay PVA.It two is earlier equal with 60～100 ℃ of water-soluble demodulation CMC, is made into the aqueous solution, treats that PVA slowly is added in the glue after all dissolving under 95 ± 3 ℃ of temperature, and the limit edged stirs up to whole mixing.This method operation is complicated, but can shorten the operating time, and glue is even, and the water consumption of dissolving CMC should be deducted from the total water amount.

Claims

1, a kind of is major ingredient with polyvinyl alcohol (PVA), with water is the anti-coagulating high-strength adhesive of solvent, it is characterized in that major ingredient polyvinyl alcohol (PVA) is 12～14wt%, dispersion stabilizer urea is 9～12wt%, tackifier Xylo-Mucine (CMC) is 0.5～1wt%, the softening agent polyvalent alcohol is 4～5wt%, and water is 69.5～72wt%.

2, a kind of preparation method as the said anti-coagulating high-strength adhesive of claim 1, it is characterized in that in the urea of the PVA of 12～14wt% and 9～12wt%, adding the water of 69.5～72wt%, stir with 40～50 rev/mins of speed at normal temperatures, under 92 ℃～98 ℃ temperature, stirred 2～3 hours with 60～70 rev/mins of speed, under 80 ℃～90 ℃ temperature, add the CMC of 0.5～1wt% and the polyvalent alcohol of 4～5wt%, and with 40～50 rev/mins of speed stirrings 30～40 minutes, discharging at normal temperatures.

3,, it is characterized in that said softening agent is glycerol (glycerine) according to the said a kind of anti-coagulating high-strength adhesive of claim 1.

4,, it is characterized in that said softening agent is an ethylene glycol according to the said a kind of anti-coagulating high-strength adhesive of claim 1.

5, according to the preparation method as the said a kind of anti-coagulating high-strength adhesive of claim 2, the temperature when it is characterized in that stirring for the second time is 95 ℃.