CN1410498A - Water based copolymer adhesive for artificial board and its preparation method - Google Patents
Water based copolymer adhesive for artificial board and its preparation method Download PDFInfo
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- CN1410498A CN1410498A CN 02149276 CN02149276A CN1410498A CN 1410498 A CN1410498 A CN 1410498A CN 02149276 CN02149276 CN 02149276 CN 02149276 A CN02149276 A CN 02149276A CN 1410498 A CN1410498 A CN 1410498A
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Abstract
A water-base copolymer adhesive for artificial board is prepared from soft monomer (10-60 wt.%), hard monomer (35-65), unsaturated carboxylic acid (2-10), hydroxy acrylate (2-10), polymer-type emulsifier monomer (1-5) through dispersing in water with special water disperser and polymerization at 30-120 deg.c. Its advantages are high performance, no release of formaldehyde, and low cost.
Description
Technical field
The present invention relates to a kind of tackiness agent, particularly relate to a kind of wood-based plate water base co-polymer tackiness agent and preparation method thereof.
Background technology:
As everyone knows; along with mankind's activity is frequent; forest reserves transition is felled and to be caused very big destruction, and prestige is being assisted environment for human survival, so timber industry faces forest reserves poorness, significant problem such as environment protection in addition; the timber imbalance between supply and demand becomes increasingly conspicuous; one of effective way that solves this contradiction is that to greatly develop with the wood-based plate be the timber comprehensive processing and utilization at center, and wherein the timber comprehensive process sticks with glue agent and occupies very important effect, and consumption is big; strict, use wide.Early stage tackiness agent all is to be raw material with the natural goods, and great majority are water miscible, as rosin, starch, gum arabic, fish glue, shellac, gelatine etc.Along with producing and scientific and technical developing rapidly, the demand of tackiness agent increases day by day.20 beginnings of the century, people begin understanding gradually to the superpolymer tackiness agent, particularly resol appearred in the production of synthetic resins type tackiness agent since 1904, had synthesized urea-formaldehyde resin, Vinyl Acetate Copolymer, urethane etc., the basis of tentatively having established the superpolymer tackiness agent subsequently again in succession.The adhesion agent for artificial board of consumption maximum is " three aldehyde " glue, i.e. resol, urea-formaldehyde resin, terpolycyantoamino-formaldehyde resin at present.But, from the nineties in 20th century, United Nations emphasizes that various countries are when tackiness agent is produced, to coordinate mutually with environmental ecology, and the existence of free formaldehyde in " three aldehyde " glue, be the root that causes the multiple disease of human body,, even cause malignant tumour after the length duration of contact as trachitis, asthma, dermatitis.Therefore, the countries in the world especially country of mass production wood-based plate are paid special attention to, and free formaldehyde content in strict control " three aldehyde " glue is if free formaldehyde content is higher than 0.1mg/kg, at some occasion forbidding.So just force wood processing industry department to seek various ways and improve synthetic technology, change synthetic technology of resins, research adopts other glue kind to replace, and free formaldehyde and organic volatile content (VOC) are no more than 0.1mg/m in controling environment as far as possible
3And 3mg/m
3, make it meet international standard, reach the requirement of green product.
In the last few years, the development of wood processing industry tackiness agent was mainly in the following aspects.
Improve the synthesis technique of original " three aldehyde " glue: reduce the consumption of formaldehyde monomers during polycondensation, adjust formaldehyde and other monomeric mol ratios, in the storage characteristics that does not influence tackiness agent, gluing poperty, make the content of free formaldehyde in the tackiness agent reach minimum standard; Before tackiness agent uses, mix a large amount of weighting agents such as shell powder, starch based, waste residue bits, tree bark powder etc., the effusion of control free formaldehyde, the while can be reduced the cost of tackiness agent again; In the woodwork glue laminated is produced,, increase hot pressing time etc., and adopt measures such as curing drying after totally-enclosed, the product glue laminated of product in the gummed post-processed, in use reduce free formaldehyde in the hope of tackiness agent and overflow by improving hot pressing temperature.
Merit attention, abroad some company is developing and is adopting other industrial tackiness agent, after making improvements, becomes the wood processing industry special-purpose adhesive.Some tackiness agent, less because of its timber industry employing that costs an arm and a leg, even do not use.At present, consider, by improving its performance from environmental angle, reduce cost, be used to wood working gradually and stick with glue among the agent, it is few to solidify the back volatile matter as isocyanate adhesive, be used for glued board, shaving board, medium density fiberboard abroad, but price is more expensive, is difficult to be widely adopted.
Summary of the invention:
The objective of the invention is to overcome above-mentioned defective, be engaged in the development research and the industrial practice of wood working tackiness agent for a long time through the contriver, exploitation provides a kind of excellent performance, formaldehydeless and other organic volatile discharges, wood-based plate water base co-polymer tackiness agent of new generation and manufacture method thereof that the shelf lives is long.
Wood-based plate water base co-polymer tackiness agent provided by the invention, comprise that the monomer mixture by following monomer component itself and weight percent is 100 weight parts, in the 70-200 weight parts water that is added with polymerization starter, molecular weight regulator, micron or nano grade inorganic filler water dispersion, disperse, under 30-120 ℃, carry out letex polymerization and get wood-based plate water base co-polymer tackiness agent, its multipolymer solid content is 20-65% based on the weight percent of tackiness agent, is preferably 40-60%.
Soft monomer 10-60
Hard monomer 35-65
Unsaturated carboxylic acid 2-10
(methyl) crylic acid hydroxy ester 2-10
Polymerizable emulsifier monomer 1-5
In wood-based plate water base co-polymer tackiness agent provided by the invention, described soft monomer provides the monomer of snappiness and cementability function for multipolymer, it can be methyl acrylate, ethyl propenoate, butyl acrylate, ethyl acrylate, butyl methacrylate, methacrylic acid-2-ethylhexyl, divinyl, isoprene, 2 chlorobutadiene etc., this this soft monomer can use separately, or mix and use, mixed ratio does not have strict regulation when using with, but arbitrary proportion.The soft monomer consumption is generally 10~60 (Wt) % based on monomer component overall weight percent, is preferably 2050 (Wt) %, and water tolerance is bad when being lower than 10 (Wt) %; Be higher than 60 (Wt) %, the wood-based plate insufficient strength that obtains.
Described hard monomer provides the monomer of rigidity and bonding strength function for multipolymer, it can be vinylbenzene, o-methyl styrene, a vinyl toluene, p-methylstyrene, adjacent ethyl styrene, an ethyl styrene, to ethyl styrene, vinyl cyanide, methacrylonitrile, vinylchlorid, vinylidene chloride, methyl methacrylate etc., described these monomers can use separately or several monomer mixes use, mixed ratio does not have strict regulation when mixing use, but arbitrary proportion is decided on gained tackiness agent purposes.The consumption of hard monomer is generally 35~65 (Wt) % based on monomer component overall weight percent, is preferably 50-60 (Wt) %.Consumption is less than 35 (Wt) %, and cohesiveness is too big; Consumption is more than 65 (Wt) %, and hardness is too big, and clinging power is not enough.
Described functional monomer is for providing the monomer of copolymer emulsion bridging property and stability feature, comprise that unsaturated carboxylic acid monomer can be vinylformic acid, methacrylic acid, methylene-succinic acid, toxilic acid, fumaric acid etc., described these monomers can use separately or several monomer mixes use, mixed ratio does not have strict regulation when mixing use, but arbitrary proportion is decided on gained tackiness agent purposes.The consumption of unsaturated carboxylic acid is generally 2-10 (Wt) % based on monomer component overall weight percent, is preferably 2-5 (Wt) %, when its carboxylic acid consumption surpasses 10 (Wt) %, and poor water resistance, alkali thickening is too strong.It is crylic acid hydroxy ester that another kind provides the function monomer of copolymer emulsion bridging property, and it can be senecioate-hydroxyl ethyl ester, Propylene glycol monoacrylate, vinylformic acid hydroxy butyl ester, methacrylic acid-beta-hydroxy ethyl ester, Rocryl 410, methacrylic acid hydroxy butyl ester, acrylic acid epoxy propyl ester, glytidyl methacrylate, vinylformic acid glycidyl ether etc.The unsaturated monomer crylic acid hydroxy ester consumption of these hydroxyls or epoxy group(ing) is generally 2-10 (Wt) %, be preferably 2-8 (Wt) %, the monomer of hydroxyl or epoxy group(ing) crylic acid hydroxy ester is lower than 2 (Wt) %, the degree of crosslinking of prepared water accack is not enough, and the bonding strength of wood-based plate and resistance toheat etc. can not reach requirement.When surpassing 10 (Wt) %, polymerization stability is poor, the stability decreases of water accack.
Described polymerizable emulsifier monomer has an anionic monomer for what the copolymer emulsion stability feature was provided, can be hydroxyl acrylic-2-ethanesulfonic acid sodium, 2-acrylamide-2-methyl propane sulfonic acid sodium, sodium p styrene sulfonate, undecylenic acid sodium, acrylamide stearic acid sodium salt etc., described these monomers can use separately or several monomer mixes use, mixed ratio does not have strict regulation when mixing use, but arbitrary proportion is decided on gained tackiness agent purposes.Because Polymerizable Emulsifier is to join in the emulsion polymerization system as a kind of comonomer, with other monomer generation copolymerizations, be attached on the polymer chain, thereby resulting copolymer emulsion has excellent mechanical stability and chemical stability with relying on the physical adsorption emulsifying agent to come stable copolymer emulsion to compare.In addition, owing to contain sulfonic acid group or hydroxy-acid group on the polymer chain,, can increase substantially tackiness agent to the bonding capacity of timber and the water tolerance of institute's panel is improved to the wetting property and the good penetrability of lumber fibre.The monomeric consumption of polymerizable emulsifier is 1-5 (Wt) %, is preferably 2-5 (Wt) %.
In order further to improve the stability of emulsion polymerization systems, reduce the generation of throw out in the emulsion polymerization process, improve product yield, can also in emulsion polymerization process, add for example sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, dodecyl biphenyl ether sodium disulfonate, sulfosuccinate ester sodium salt succsinic acid two caproic acid sodium sulfonates etc. for example of a small amount of anionic emulsifier; Nonionic emulsifier for example uses oxyethane to add becomes 10,20 or 40 Nonyl pheno base ether.According to employed emulsifying agent kind, the emulsifying agent consumption is answered the subcritical micellar concentration, otherwise can influence the water tolerance of goods.
Described polymerization starter comprises that those known compounds that cause letex polymerization have organo-peroxide such as tertbutyl peroxide, hydrogen phosphide cumene etc.; Inorganic peroxide such as hydrogen peroxide, Potassium Persulphate, Sodium Persulfate, ammonium persulphate etc.Initiator amount is advisable to reach initiated polymerization usually, and general (in total monomer weight 100 weight parts) are the 0.1-5 weight part.
Molecular weight regulator used in the present invention can be methenyl bromide, tetracol phenixin, long-chain mercaptan such as lauryl mercaptan etc. or other known molecular weight regulators.The consumption of molecular weight regulator general (in total monomer weight 100 weight parts) is the 0.1-5 weight part.
For Joint strength and the wetness degree that improves tackiness agent and timber, the present invention in polymerization process or polymerization add water dispersions such as part mineral filler water dispersion such as micron or nanometer grade calcium carbonate, titanium dioxide, silicon-dioxide after finishing, add-on is generally the 0.1-20 weight part with respect to 100 weight parts monomers amounts, is preferably the 0.5-10 weight part.
Water accack of the present invention can make an addition in shaving board, high, normal, basic fiberboard and the glued board with usual method.In order to reduce cost, also can add stopping composition such as shell powder, starch, tree bark powder.In addition,, also can add an amount of zinc oxide, isocyanic ester, zinc acetate etc., further improve the crosslinking degree of tackiness agent in wood-based plate as linking agent in order to increase the bonding strength of tackiness agent in wood-based plate.
The preparation method of wood-based plate water base co-polymer tackiness agent provided by the invention, comprise that the monomer mixture with following monomer component and weight percent thereof is 100 weight parts, in the 70-200 weight parts water that is added with polymerization starter, molecular weight regulator, micron or nano grade inorganic filler water dispersant, disperse, under 30-120 ℃ of temperature, carry out letex polymerization and make wood-based plate water base co-polymer tackiness agent, its multipolymer content is 20-65% based on the total weight percent of tackiness agent, is preferably 40-60%
Soft monomer 10-60
Hard monomer 35-65
Unsaturated carboxylic acid 2-10
(methyl) crylic acid hydroxy ester 2-10
Polymerizable emulsifier monomer 1-5
In the manufacture method according to wood-based plate water base co-polymer tackiness agent provided by the invention, can adopt the emulsion polymerisation process of intermittent type, semibatch or successive polymerization formula, when discontinuous emulsion polymerization, in advance whole monomers are disperseed in dispersion medium, and add the letex polymerization auxiliary agent, carry out letex polymerization again.When the semibatch letex polymerization, behind a part of monomer polymerization, all the other monomers are added on continuously carry out letex polymerization in the dispersion medium again.When the successive polymerization formula is carried out the continuous emulsion polymerization, monomer is added continuously to carries out the continuous emulsion polymerization in the dispersion medium.Three kinds of polymerization methodses carry out letex polymerization and can select according to actual needs to realize purpose of the present invention.
Described polymerization temperature is usually at 30-120 ℃, preferably between 70-120 ℃.Polymerization temperature is too low, and polymerization cycle is long; Polymerization temperature is too high, and the throw out that polymerization process produces increases.
Emulsion polymerization systems PH of the present invention maintains the scope of about 1.5-7 usually between polymerization period, be preferably 2-5.
Along with the whole of polymerization process finish, the solid content of resulting water base copolymer adhesive is regulated, can adopt to add water or the method that water steams is reached desired solid content.Usually require the solid content of multipolymer to be about 20-65%, be preferably 40-60% (based on the total weight percent of tackiness agent).
Water base copolymer adhesive of the present invention is to adopt the preparation of emulsifier-free emulsion polymerization method.Emulsifier-free emulsion polymerization is meant the emulsion polymerization process that does not add emulsifying agent fully or only add micro-emulsifying agent (its concentration is less than micelle-forming concentration) in reaction process.In traditional letex polymerization, all to add emulsifying agent so that system is stable, can influence the bond strength of copolymer emulsion and water resistance etc., its application is restricted yet contain more emulsifying agent.One of feature of the present invention is to introduce the polymerizable emulsifier monomer to join in the emulsion polymerization system as comonomer and during other monomer generation copolymerization, be attached on the polymer chain in polymerization process, plays the internal emulsification effect.Under the prerequisite that does not influence the product application performance, in polymerization process, can add the stability that small amounts of emulsifiers (subcritical micellar concentration) further improves copolymerization system.
In the manufacture method according to wood-based plate water base co-polymer tackiness agent provided by the invention, can also adopt core-shell emulsion polymerization, dispersion emulsion polymerization, emulsion tactic polymerization, radiation-induced emulsion polymerization technology, adopt intermittently, semicontinuous, continuously feeding technology all can obtain water base copolymer adhesive of the present invention.Within the scope of the invention, by changing the macromole parameter that multipolymer proportion of composing, adding mode and corresponding technological conditions are regulated tackiness agent, can satisfy the requirement of various wood-based plate complete processings and physical index.
Water base multipolymer water accack provided by the invention avoids fully that so-called three-aldehyde glue discharges deleterious formaldehyde volatile organic compounds contaminate environment in the prior art, the disadvantage of special domestic environment, be formaldehydeless and other organic volatile release, and can reach more than half a year 3-35 ℃ of following storage.The tackiness agent excellent performance, very good as bonding strength, water tolerance and weather resistance, the processing characteristics of excellence, be adhesion agent for artificial board of new generation.
Production technique is simple, and cost is low, is convenient to application, is widely used in various wood-based plates and comprises high, medium and low fiberboard, shaving board, in the glued board, receives praises from customers.
Embodiment
The present invention further specifies the present invention with the following example, but protection scope of the present invention is not limited to embodiment.
Per-cent in embodiment, comparative example (%) is meant monomeric weight percentage, and umber is meant the parts by weight that added with respect to 100 weight parts monomers.
Emulsion polymerization cross, be equipped with nitrogen replacement agitator, carry out in the adjustable 5 liters of stainless steel pressure reactors of temperature.
Embodiment 1
Polymerization formula:
Ethyl acrylate 30%
Vinylbenzene 60%
Vinylformic acid 2%
Senecioate-hydroxy methacrylate 3%
2-acrylamide-2-methyl propane sulfonic acid sodium 5%
4 parts in tetracol phenixin
0.5 part of Potassium Persulphate
0.2 part of dihexyl sodium sulfosuccinate
5 parts of nano-calcium carbonates (about particle diameter 40nm)
120 parts in water
Polymerization process is as follows: at first whole dihexyl sodium sulfosuccinates, nano-calcium carbonate and 100 parts of water are added to stir in the reactor and heat up, the control temperature in the kettle is 70 ℃, remaining 20 parts of water and Potassium Persulphate are added in the reactor, mixture with monomer and tetracol phenixin was added drop-wise in the reactor in 6 hours continuously simultaneously, continue reaction 3 hours then, make polymerization complete.Gained copolymer emulsion polymerisation conversion is 98%.Product is regulated PH to 7 with ammoniacal liquor, under vacuum state, be blown into water vapour then and remove unreacted monomer, use 120 metal mesh filters, obtain solid content and be 40%, viscosity is the water base copolymer adhesive of 120mpa.s, particle diameter 180nm.
Embodiment 2
Polymerization formula:
Ethyl acrylate 40%
Methyl methacrylate 10%
Vinyl cyanide 20%
Vinylbenzene 20%
Methylene-succinic acid 2%
Senecioate-hydroxy methacrylate 3%
2-acrylamide-2-methyl propane sulfonic acid sodium 5%
4 parts in tetracol phenixin
0.5 part of Potassium Persulphate
0.2 part of dihexyl sodium sulfosuccinate
5 parts of nano silicons (about particle diameter 20nm)
120 parts in water
Polymerization process and poly-identical embodiment 1 of step.Obtain solid content and be 40%, viscosity is the water base copolymer adhesive of 110mpa.s, particle diameter 150nm.
Embodiment 3
Polymerization formula:
Divinyl 30%
Vinylbenzene 60%
Methylene-succinic acid 2%
Senecioate-hydroxy methacrylate 3%
2-acrylamide-2-methyl propane sulfonic acid sodium 5%
4 parts in tetracol phenixin
0.5 part of Potassium Persulphate
0.2 part of dihexyl sodium sulfosuccinate
5 parts of nano silicons (about particle diameter 20nm)
120 parts in water
Polymerization process and poly-identical embodiment 1 of step.Obtain solid content and be 40%, viscosity is the water base copolymer adhesive of 150mpa.s, particle diameter 180nm.
Embodiment 4
Embodiment 4 changes the vinylformic acid among the embodiment 1, senecioate-hydroxy methacrylate respectively and does methacrylic acid and methacrylic acid-beta-hydroxy ethyl ester, and its polymerization process and step are poly-with embodiment 1.Obtain solid content and be 40%, viscosity is the water base copolymer adhesive of 120mpa.s, particle diameter 180nm.
Embodiment 5
Embodiment 5 changes the senecioate-hydroxy methacrylate among the embodiment 3 and does methacrylic acid-beta-hydroxy ethyl ester, and its polymerization process and step are poly-with embodiment 3.Obtain solid content and be 40%, viscosity is the water base copolymer adhesive of 150mpa.s, particle diameter 180nm.
Embodiment 6
Embodiment 6 changes the acrylamide of the 2-among the embodiment 3-2-methyl propane sulfonic acid sodium and does undecylenic acid sodium, and its polymerization process and step are poly-with embodiment 3.Obtain solid content and be 40%, viscosity is the water base copolymer adhesive of 120mpa.s, particle diameter 160nm.
Water base copolymer adhesive with embodiment 1-6 prepares shaving board and medium density fibre board (MDF) as adhesion agent for artificial board respectively.Wherein, the shaving board glue consumption is 9%, and the medium density fibre board (MDF) glue consumption is 10%.
Comparative example 1 is the wood-based plate with the urea-formaldehyde resin preparation.Comparative example 2 is the wood-based plate with the resol preparation.
Table-1 is that the physical index of shaving board and medium density fiberboard compares, and is used for the wood-based plate performance by the visible water base copolymer adhesive provided by the invention of table and is much better than urea-formaldehyde resin and resol wood-based plate, and domestic environment is polluted in formaldehydeless release.
Table-1
Embodiment | Comparative example | |||||||||
??1 | ??2 | ??3 | ??4 | ??5 | ??6 | ??1 | ??2 | |||
Rerum natura | Shaving board | MOR Mpa | ??19 ??0.54 ??1.08 ??4.5 ??0 ??0.8 ??1750 ??1420 | ?21 ?0.60 ?1.16 ?4.3 ?0 ?0.8 ?1820 ?1530 | ??17 ??0.55 ??1.18 ??4.3 ??0 ??0.8 ??1700 ??1350 | ??24 ??0.62 ??1.20 ??4.5 ??0 ??0.8 ??1950 ??1610 | ??23 ??0.67 ??1.22 ??4.5 ??0 ??0.8 ??1910 ??1590 | ??17 ??0.52 ??1.17 ??4.5 ??0 ??0.8 ??1730 ??1460 | ??16 ??0.44 ??0.96 ??7.1 ??28 ??0.8 ??1170 ??920 | ??17.2 ??0.50 ??1.04 ??6.5 ??21 ??0.8 ??1350 ??980 |
Internal bond strength Mpa | ||||||||||
Surface bonding strength Mpa | ||||||||||
Thickness swelling rate % | ||||||||||
Free formaldehyde release mg/100g | ||||||||||
Density g/cm 3 | ||||||||||
Hold screw power | ||||||||||
Vertical panel face N | ||||||||||
Parallel plate face N | ||||||||||
Medium density fiberboard | MOR Mpa | ??32.4 ??2310 ??0.82 ??1900 ??1450 ??0 | ?34.0 ?2390 ?0.86 ?1920 ?1470 ?0 | ??32.6 ??2320 ??0.83 ??1770 ??1440 ??0 | ??36.7 ??2750 ??0.94 ??2130 ??1620 ??0 | ??36.9 ??2790 ??0.96 ??2150 ??1620 ??0 | ??32.2 ??2450 ??0.85 ??1870 ??1310 ??0 | ??29.6 ??2120 ??0.64 ??1470 ??920 ??29 | ??30.4 ??2270 ??0.71 ??1520 ??1050 ??20 | |
Young's modulus Mpa | ||||||||||
Plane tensile strength Mpa | ||||||||||
Screw power N is held in the front | ||||||||||
Screw power N is held in the side | ||||||||||
Free formaldehyde release mg/100g |
Claims (10)
1, a kind of wood-based plate water base co-polymer tackiness agent, comprise that the monomer mixture by following monomer component itself and weight percent is 100 weight parts, in the 70-200 weight parts water that is added with polymerization starter, molecular weight regulator, micron or nano grade inorganic filler water dispersion, disperse, carry out letex polymerization and get wood-based plate water base co-polymer tackiness agent under 30-120 ℃, its multipolymer solid content is 20-65% based on the weight percent of tackiness agent
Soft monomer 10-60
Hard monomer 35-65
Unsaturated carboxylic acid 2-10
Crylic acid hydroxy ester 2-10
Polymerizable emulsifier monomer 1-5
2,, it is characterized in that described soft monomer is methyl acrylate, ethyl propenoate, butyl acrylate, ethyl acrylate, butyl methacrylate, methacrylic acid-2-ethylhexyl, divinyl, different the eleventh of the twelve Earthly Branches diene or 2 chlorobutadiene according to the water base copolymer adhesive of claim 1.
3, according to the water base copolymer adhesive of claim 1, it is characterized in that described hard monomer be vinylbenzene, o-methyl styrene, a vinyl toluene, p-methylstyrene, adjacent ethyl styrene, an ethyl styrene, to ethyl styrene, vinyl cyanide, methacrylonitrile, vinylchlorid, vinylidene chloride or methyl methacrylate.
4,, it is characterized in that described unsaturated carboxylic acid is vinylformic acid, methacrylic acid, methylene-succinic acid, toxilic acid or fumaric acid according to the water base copolymer adhesive of claim 1; Crylic acid hydroxy ester is senecioate-hydroxyl ethyl ester, Propylene glycol monoacrylate, vinylformic acid hydroxy butyl ester, methacrylic acid-beta-hydroxy ethyl ester, Rocryl 410, methacrylic acid hydroxy butyl ester, acrylic acid epoxy propyl ester, glytidyl methacrylate or vinylformic acid glycidyl ether.
5,, it is characterized in that described polymerizable emulsifier monomer is hydroxyl acrylic-2-ethylsulfonic acid sodium, 2-acrylamide-2-methyl propane sulfonic acid sodium, sodium p styrene sulfonate, undecylenic acid sodium or acrylamide stearic acid sodium salt according to the water base copolymer adhesive of claim 1.
6,, it is characterized in that described emulsifying agent is sodium laurylsulfonate, Sodium dodecylbenzene sulfonate, dodecyl biphenyl ether sodium disulfonate succsinic acid two caproic acid sodium sulfonates according to the water base copolymer adhesive of claim 1; Oxyethane adds becomes 10,20 or 40 Nonyl pheno butyl ether; Described polymerization starter is tertbutyl peroxide, hydrogen phosphide cumene, hydrogen peroxide, Potassium Persulphate, Sodium Persulfate or ammonium persulphate; Described molecular weight regulator is methenyl bromide, tetracol phenixin or lauryl mercaptan; Described mineral filler water dispersion is micron or nanometer grade calcium carbonate, titanium dioxide or silicon-dioxide.
7, a kind of preparation method of wood-based plate water base co-polymer tackiness agent, the monomer mixture that comprises following monomer component itself and weight percent is 100 weight parts, in the 70-200 weight parts water that is added with polymerization starter, molecular weight regulator, micron or nano grade inorganic filler water dispersion, disperse, carry out letex polymerization and get wood-based plate water base co-polymer tackiness agent under 30-120 ℃, its multipolymer solid content is 20-65% based on the weight percent of tackiness agent
Soft monomer 10-60
Hard monomer 35-65
Unsaturated carboxylic acid 2-10
Crylic acid hydroxy ester 2-10
Polymerizable emulsifier monomer 1-5
8, according to the preparation method of a kind of wood-based plate water base co-polymer tackiness agent of claim 7, it is characterized in that described polymerization temperature is 70-100 ℃.
9, according to the preparation method of a kind of wood-based plate water base co-polymer tackiness agent of claim 7, it is characterized in that described multipolymer solid content is 40-60% based on the tackiness agent total weight percent.
10,, it is characterized in that letex polymerization can adopt intermittent type, semibatch or successive polymerization formula to carry out letex polymerization according to the preparation method of a kind of wood-based plate water base co-polymer tackiness agent of claim 7.
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2002
- 2002-11-08 CN CN 02149276 patent/CN1244658C/en not_active Expired - Lifetime
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