CN101284974A - Konjak polysaccharide adhesive - Google Patents

Abstract

The invention relates to a konjak polyoses sizing agent. The sizing agent is made by konjak polyoses as a main material matched with a plurality of auxiliary materials and has large viscosity and good stability; the viscosity, the bonding strength, the storage period, etc. of the sizing agent meet the national requirements. The konjak polyoses sizing agent contains no benzene, formaldehyde, phenol and other harmful material compositions, has no environment pollution and is unharmful to human body, thereby becoming a degradable green environment-friendly sizing agent. Moreover, the sizing agent has good adhesiveness, high bonding strength, low manufacturing cost, simple preparation process and wide purpose and can be not only used as the sizing agent of paper, cartons, cigarettes, toys, cardboards, etc. but also used for the bonding of timber, veneer boards, fiberboards, furniture, etc.

Description

A kind of konjak polysaccharide adhesive

Affiliated technical field the present invention relates to a kind of tackiness agent, particularly a kind of konjak polysaccharide adhesive.

Background technology

Tackiness agent is can be two adhering objects together, and the material of sufficient intensity is arranged in the junction.Be normally used for industries such as weaving, clothes, shoemaking, papermaking, printing, packing, building decoration, timber, photoelectron, metal machinery, car and boat manufacturing, aerospace, health care.General tackiness agent has kinds such as natural resin adhesive, adhesive made of synthetic resin, rubber based adhesives, rubber combined tackiness agent, inorganic adhesive and natural adhesive.

" contemporary chemical industry " delivers Song Bo on 2006 the 35th the 2nd phases of volume, Wang Xiaoli, the article of Li Lu " research of modification low toxicity neoprene adhesive ", introduced a kind of method for making of neoprene adhesive, under organo-peroxide causes, make chloroprene rubber (CR) and the graft polymerization of low carbon number alkene class modified monomer, adopt modified acetone and low-carbon (LC) aromatic hydrocarbons, ester class to have performance and the lower modification low toxicity neoprene adhesive of glue toxicity that difficulty is glued the material good bonding for the low toxicity mixed solvent makes.Typical process flow is: the chloroprene rubber 2 times → mixing → chopping → stirring → glue of plasticating.

" bonding " delivers the article " research of modified urea-formaldehyde resin adhesive synthetic " of Chen Lianqing on 2007 the 28th the 4th phases of volume, its preparation method: in there-necked flask, adding formaldehyde and polyvinyl alcohol (PVA) stirs, add the 1st batch of urea (total amount 60%), after treating that urea all dissolves, regulating the pH value with 20%NaOH solution is 7.8～8.5.Heating in water bath is warmed up to 90～95 ℃, keeps 50min.Behind 10min, the 2nd batch of urea (total amount 30%) is dropwise joined in the three-necked bottle.After adding, continue reaction 30min, temperature of reaction drops between 80～85 ℃, the NH with 20% ₄Cl solution is regulated pH value to 4.8～5.5, after reaction for some time, drips 20%NaOH liquid, regulates pH value to 7.5～8.0.After the question response temperature drops to below 70 ℃, splash into several methyl alcohol, carry out decompression dehydration, after treating that product viscosity is qualified, in reaction solution, add the 3rd batch of urea (total amount 10%) and trimeric cyanamide, treat that it all after the dissolving, is cooled to 40～50 ℃, with NaOH adjust pH to 7.5～8.0, cooling discharging gets product.

Deliver the article " development of corn starch adhesive " that Huang Xianghong, bang fly on the 4th phase of volume " bonding " calendar year 2001 the 22nd, introduced a kind of method for making of starch adhesive, its basic preparation technology is as follows: (1), starch and water are made into 40% starch milk drips 10% H ₂SO ₄, regulating the pH value is about 1, adds oxalic acid, stirs 10min, continues to add while stirring the 1%KMnO of total amount 2/3 ₄Solution adds remaining KMnO behind the stirring 45min again ₄Solution stirs 20min.(2), with above-mentioned starch fluid distilled water repetitive scrubbing suction filtration, till filtrate pH=7.(3), filtrate is transferred in the reactor, the water that adds total amount 1/2 stirs, and adds small amount of N a ₂S stirs 10min, slowly drips 10%NaOH solution then, continues to stir and add the water and the small amounts of phosphoric acid tri-n-butyl of residual content after the gelatinization.(4), borax is dissolved in a spot of hot water, slowly add in the above-mentioned amylan while stirring, add small amount of N aCl then, continue to stir 10min, get product.

Application number is the patent of invention " modified chlorinated polypropylene adhesive " of 200510019196.X, has introduced a kind of tackiness agent made from Chlorinated Polypropylene III, glycidyl acrylate, additive vinylbenzene or N,N-DIMETHYLACETAMIDE or dimethyl sulfoxide (DMSO), initiator dibenzoyl peroxide or dicumyl peroxide and tackifier petroleum resin or rosin fat or terpenes.

Application number is 200310105824.7 patent of invention " a kind of preparation method of fast-drying type corn starch adhesive agent ", and having introduced a kind of is main raw material with the Sumstar 190, the tackiness agent that adding modified alta-mud etc. is made.

The raw material of above-mentioned various tackiness agent is not raw material with the konjac polysaccharide.

Summary of the invention

Purpose of the present invention is to utilize the full-bodied character of konjac polysaccharide, cooperates other auxiliary agents, make degradable, environmental protection, binding property is good, bonding strength is high, preparation is simple, low-cost, and nontoxic a kind of konjak polysaccharide adhesive.

A kind of konjak polysaccharide adhesive of the present invention is a kind of tackiness agent, and its product is an emulsion; By konjac polysaccharide [(C ₂₀H ₃₂O ₁₆) n], trisodium phosphate (Na ₄P ₂O ₇10H ₂O), sucrose (C ₁₂H ₂₂O ₁₁), borax (Na ₂B ₄O ₅(OH) ₄8H ₂O), glycerine (C ₃H ₈O ₃), wilkinite ((Na, Ca) _0.33(Al, Mg, Fe) ₂[(Si, Al) ₄O ₁₀(OH) ₂NH ₂O]), potassium sorbate (C ₆H ₇O ₂K) and water (H ₂O) form, the weight percent of each raw material and water is respectively konjac polysaccharide 1.5%～3.0%, trisodium phosphate 0.02%～0.04%, sucrose 0.025%～0.05%, borax 0.03%～0.06%, glycerine 0.003%～0.006%, wilkinite 6%～10%, potassium sorbate 0.001%～0.002%.

The preparation method of a kind of konjak polysaccharide adhesive of the present invention is made up of following steps:

(1) konjac polysaccharide and sucrose adding are equipped with in the container of water, and heated and stirred is to pasty state; The temperature of heating is controlled at 50～60 ℃; The addition of konjac polysaccharide and sucrose is respectively 1.5%～3.0% and 0.025%～0.05% of water weight;

(2) regulate mashed prod to pH=3, in mashed prod, add trisodium phosphate then, continued heated and stirred 1.5～2.5 hours; The temperature of heating is controlled at 50～60 ℃; The addition of trisodium phosphate is 0.02%～0.04% of a water weight;

(3) in the mixing solutions of step (2) gained, add borax; The addition of borax is 0.03%～0.06% of a water weight;

(4) wilkinite, glycerine and potassium sorbate are added in the mixing solutions of step (3), stir, treat the glue cool to room temperature, regulate pH to 6～8, be environment-friendly adhesive.The addition of described wilkinite, glycerine and potassium sorbate is respectively 6%～10%, 0.003%～0.006% and 0.001%～0.002% of water weight.

A kind of konjak polysaccharide adhesive of the present invention, with the konjac polysaccharide is that main raw material, trisodium phosphate are that esterifying agent, sucrose are that solubility promoter, borax are that linking agent, glycerine are that softening agent, wilkinite are that filler, potassium sorbate are that sanitas, water are solvent, the konjak polysaccharide adhesive of making has that good maintenance is plastic, physico-chemical property and an antibacterial effect such as film forming, swelling degree height, viscosity are big.But also has advantage such as draw materials conveniently, cheap.A kind of konjak polysaccharide adhesive of the present invention is nontoxic, even eat by mistake also harmless.Konjac polysaccharide has the macromolecule network structure, and is big by having viscosity after the Phosphation modification, and the characteristics of good stability are mixed with other material, can form the film with superperformance, is the good material of preparation tackiness agent.

The adhesiveproperties of a kind of konjak polysaccharide adhesive of the present invention meets national requirements, as viscosity, cohesive strength, tack time, storage period etc., compare with common superpolymer tackiness agent, also have degradable, environmental protection, nontoxic, cost is low, simple operation and other advantages.Compare with typical oxidation modification starch adhesive, konjak polysaccharide adhesive not only cost is low, and performance is better than the oxidation modification starch adhesive.

Specific embodiment:, be illustrated below in conjunction with embodiment in order fully to disclose a kind of konjak polysaccharide adhesive of the present invention.

Embodiment: a kind of preparation method of konjak polysaccharide adhesive, be made up of following steps:

(1) konjac polysaccharide and sucrose adding are equipped with in the container of water, and heated and stirred is to pasty state on constant temperature blender with magnetic force to put container, Heating temperature is 60 ℃, and stirring velocity is 1000R/min; The consumption of described konjac polysaccharide and sucrose is respectively 2.0% and 0.04% of water weight.

(2) the pH value with hydrochloric acid or sodium bicarbonate regulating step (1) mashed prod is 3, and adds trisodium phosphate, continues heated and stirred 2 hours; The amount of adding trisodium phosphate is 0.025% of a water weight, and the temperature of heating is controlled at 58 ℃.

(3) join borax in the mixing solutions of step (2) gained by 0.04% of water weight;

(4) weight percent according to wilkinite, glycerine, potassium sorbate and water is wilkinite 9%, glycerine 0.004%, potassium sorbate 0.0016%, joins in step (3) the gained mixing solutions, stirs, and gets glue; Treat the glue cool to room temperature, regulating glue pH is 7, is konjak polysaccharide adhesive.

Konjak polysaccharide adhesive viscosity of the present invention can reach 2.0Pas, and flowability is 5-6cm, and shearing resistance can reach 5.6MPa, tack 15min, time of drying the fastest 50min that reaches, 6 months storage periods.And the viscosity of starch adhesive is＞0.9Pas, and flowability is 3～9cm, shearing resistance＞4.5MPa, tack＜20min, time of drying＜90min, storage period 〉=March;

The konjak polysaccharide adhesive that makes of utilization present method have degradable, environmental protection, nontoxic, viscosity good, cost is low, stable performance, practical, simple operation and other advantages, both can be used for the processing of paper, carton, cigarette, toy, cardboard etc., can be used for the bonding of timber, glued board, fiberboard, furniture etc. again.During use, prepared tackiness agent is evenly coated the bonded joint place of convered structure, treat that it docks pressure a little with bonded joint after dried slightly, room temperature is placed and was got final product in several minutes.

Claims (2)

1, a kind of konjak polysaccharide adhesive is characterized in that

(1) forms by konjac polysaccharide, trisodium phosphate, sucrose, borax, glycerine, wilkinite, potassium sorbate and water;

(2) weight percent of each raw material and water is respectively: konjac polysaccharide 1.5%～3.0%, trisodium phosphate 0.02%～0.04%, sucrose 0.025%～0.05%, borax 0.03%～0.06%, glycerine 0.003%～0.006%, wilkinite 6%～10%, potassium sorbate 0.001%～0.002%.

2, a kind of preparation method of konjak polysaccharide adhesive is characterized in that may further comprise the steps:

(1) konjac polysaccharide and sucrose adding are equipped with in the container of water, and heated and stirred is to pasty state; The temperature of heating is controlled at 50～60 ℃; The addition of konjac polysaccharide and sucrose is respectively 1.5%～3.0% and 0.025%～0.05% of water weight;

(2) regulate mashed prod to pH=3, in mashed prod, add trisodium phosphate then, continued heated and stirred 1.5～2.5 hours; The temperature of heating is controlled at 50～60 ℃; The addition of trisodium phosphate is 0.02%～0.04% of a water weight;

(3) in the mixing solutions of step (2) gained, add borax; The addition of borax is 0.03%～0.06% of a water weight;

(4) wilkinite, glycerine and potassium sorbate are added in the mixing solutions of step (3), stir, treat the glue cool to room temperature, regulate pH to 6～8, be environment-friendly adhesive.The addition of described wilkinite, glycerine and potassium sorbate is respectively 6%～10%, 0.003%～0.006% and 0.001%～0.002% of water weight.