CN106281157A - Moistureproof composite urea formaldehyde resin and production method thereof - Google Patents
Moistureproof composite urea formaldehyde resin and production method thereof Download PDFInfo
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- CN106281157A CN106281157A CN201610746060.7A CN201610746060A CN106281157A CN 106281157 A CN106281157 A CN 106281157A CN 201610746060 A CN201610746060 A CN 201610746060A CN 106281157 A CN106281157 A CN 106281157A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
- C09J161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C09J161/32—Modified amine-aldehyde condensates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Adhesives Or Adhesive Processes (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses a kind of moistureproof composite urea formaldehyde resin and production method thereof, including following raw material: cyanurotriamide modified urea resin；Oxytarch；Polyvinyl alcohol；Magnesium oxide；Propanediol polyoxypropylene polyvinylether；Hexamethylenetetramine；Isocyanuric acid three-glycidyl ester；VTES；Phenolate lignin；Clear water；Anti-blushing agent.Production method is: be first put in reactor by clear water, heating, it is subsequently adding magnesium oxide, VTES and propanediol polyoxypropylene polyvinylether, stirring, add polyvinyl alcohol, phenolate lignin, cyanurotriamide modified urea resin and Oxytarch, keep 80 90 DEG C of stirring reactions 25 hours, add hexamethylenetetramine, isocyanuric acid three-glycidyl ester and anti-blushing agent before use.The moistureproof composite urea formaldehyde resin of the present invention is waterproof, humidity resistance good, as the main binder of wood-based plate, it is possible to increase the sealing property of wood-based plate, makes moisture, moisture be difficult to penetrate into inside wood-based plate.
Description
Technical field
The invention belongs to adhesive production field, particularly a kind of moistureproof composite urea formaldehyde resin and production method thereof.
Background technology
Along with the rapid development of China's economic, the raising of living standards of the people, the requirement to house decoration the most constantly improves.Wood
Floor, because of its naturally graceful lines, good texture, becomes the preferred material of family's ground surface finishing.In order to save timber,
Conserving forests, country encourages to remain in thing, timber processing, bamboo processing and Wood-based Panel Production with three in production of forestry to produce saw
Bits, wood shavings, bark, sanding powder, brush wood, after crops are received, all kinds of straws of generation, shuck etc. are artificial for raw material production
Plate.It is called particieboard, density board with the wood-based plate that these woodss, agricultural byproduct produce.The production process of particieboard and density board needs
Want substantial amounts of adhesive, the most often produce 1 cubic metre of density board, need to use the adhesive of 100～400kg.The most frequently used
Adhesive is Lauxite or modified urea-formaldehyde resin.One of raw materials for production of Lauxite or modified urea-formaldehyde resin are formaldehyde, because of
This, particieboard, density board all inevitably release formaldehyde.Formaldehyde is to nasal mucosa, retina, respiratory tract and the liver of human body all
There is stimulation, for a long time 15 × 10-3The environment of the high-concentration formaldehyde content of mg/L works and lives, there will be allergy, head
The formaldehyde poisoning symptoms such as dizzy, fatiguability, vomiting, severe patient can cause a disease, the most carcinogenic.
Therefore burst size of methanal is restriction particieboard, a key factor of density board development.Due to all kinds of straws, nut
The wood-based plate poor water resistance that the raw materials such as shell are made, makes bow warping deform because producing expansive force difference after moisture absorption.Therefore, improve
The resistance to water of Lauxite, reduces residual formaldehyde, improves fire resistance, becomes particieboard and density board industry development primarily solves
Problem certainly.
Patent in terms of retrieving below in relation to moistureproof Lauxite:
Chinese patent, application number: 201310379676.1；Applicant: Lu Meiling；Denomination of invention: a kind of moistureproof urea-formaldehyde resin adhesive
Glutinous agent and production method thereof；Summary: the invention provides a kind of Moisture-proof urea-formaldehyde resin adhesive, its raw material and parts by weight bag
Include: Lauxite 40～60 parts, polyacrylate dispersion 5～10 parts, polydimethylsiloxane 0.5～1 part, filler 20
～30 parts and EVA latex 2～5 parts, preparation method is, first prepares Lauxite, formaldehyde for disposably to feed intake, carbamide
Feed intake in three times；The production of Lauxite is divided into prepolymerization, polymerization and later stage polymerization three phases, adds poly-after later stage polymerization
Acrylic acid ester emulsion, polydimethylsiloxane and EVA latex, stirring reaction completely adds filler later, by this technique,
Avoiding the generation of polymerization process gelatin phenomenon, the Lauxite narrow molecular weight distribution of gained, residual formaldehyde is low, is used for producing
Wood-based plate, particularly ceiling decoration plate, it is possible to the occasion at south high humidity uses, and burst size of methanal is low.
The adhesive that above-mentioned patent prepares is provided with good moisture effect, but there is also some defects.Such as Shen
Please number be the patent of 201310379676.1, its Lauxite be through cyanurotriamide modified, and waterproof and dampproof aspect of performance is not
Such as the Lauxite through cyanurotriamide modified mistake.
And cyanurotriamide modified urea resin is to be modified preparing on the basis of Lauxite, Lauxite has former
Expect cheap and easy to get, solidification temperature without advantages such as strict restrictions, but Lauxite boiling water resistance and ageing resistance tea, because its solidification
After resin in there is hydrophilic free methylol, they are easily combined with water.And the tripolycyanamide of band ring molecule is introduced urea
In urea formaldehyde, form tridimensional network, enclose many hydrophilic groups, change resin backbone structure, promote resin and hand over
Connection, thus reached to improve the adhesion strength of resin, resistance to water and the purpose of ageing resistance, turn avoid simple melamine simultaneously
The shortcoming that amine-formaldehyde resins is relatively costly.
Summary of the invention
For the technological deficiency of above-mentioned existence, it is an object of the invention to provide a kind of moistureproof composite urea formaldehyde resin and production thereof
Method, solves the wood-based plate poor water resistance that the raw materials such as current all kinds of straw, shuck are made, because producing expansive force difference after moisture absorption
And the problem making bow warping deform, develop that a kind of resistance to water is strong, adhesion strength is high, that residual formaldehyde amount is low, with low cost is anti-
Tide composite urea formaldehyde resin.
The technical solution used in the present invention is:
A kind of moistureproof composite urea formaldehyde resin, including the raw material of following parts by weight:
Cyanurotriamide modified urea resin 50～100 parts；
Oxytarch 20～30 parts；
Polyvinyl alcohol 1～3 parts；
Magnesium oxide 3～8 parts；
Propanediol polyoxypropylene polyvinylether 2～3 parts；
Hexamethylenetetramine 2～3 parts；
Isocyanuric acid three-glycidyl ester 1～2 parts；
VTES 0.5～5 parts；
Phenolate lignin 5～10 parts；
Clear water 100～200 parts；
Anti-blushing agent 2～5 parts.
Described anti-blushing agent is paraffin wax emulsions, uses the product that Ren Xin plastic molding and processing plant of Wenan County produces, and Corporation web site is:
Http:// show.guidechem.com/renxin/pro-show5725830.html, paraffin wax emulsions outward appearance is that milky is equal
Matter liquid, solid content is 40-42%, and pH value is 6-7, and under air-proof condition, storage-stable is more than 24 months.Ren Xin plastic molding and processing plant of Wenan County
The paraffin wax emulsions of Development and Production belongs to electrostatic nanoemulsions, it is possible to repelled making emulsion occur without caking phenomenon by positive electricity, breast
Liquid granule is tiny to nanometer, and the water resistance of particieboard is higher, and surface flatness is more preferable.Usage and consumption: will at applying glue scene
Waterproofing agent joins in glue, now with the current, is suitable for (the note: the requirement of this method is that storage glue groove must of the water-proofing treatment to particieboard
The glue being mixed into waterproofing agent must be made to remain stirring with agitating device, to prevent waterproofing agent from floating on surface).
Cyanurotriamide modified urea resin of the present invention uses the cyanurotriamide modified urea resin bought on market
Or use the cyanurotriamide modified urea resin of Guangxi Nanning Green Park Beilin Wood Industry Co., Ltd.'s research, number of patent application: CN
201310353442.X；The applying date: 2013.08.14；Open (bulletin) number: CN 103408711A；Application (patent right) people: wide
Southwest north, Ning Lv garden forest industry company limited, the primary raw material of this cyanurotriamide modified urea resin be formaldehyde, tripolycyanamide and
Carbamide, uses and disposably adds formaldehyde, adds carbamide and the method for tripolycyanamide several times, controls reaction rate, it is to avoid gel
The generation of phenomenon, promotes the reaction completely of formaldehyde.Repeatedly add carbamide, the carbamide every time added and the polymerization rate of formaldehyde
The most different with condition, it is divided into prepolymerization, is polymerized and is polymerized later stage three phases, each stage adds the amount of carbamide and differs
Sample, reaction temperature is the most different, by this technique, it is to avoid the generation of polymerization process gelatin phenomenon, the Lauxite of gained
Narrow molecular weight distribution, residual formaldehyde is low, is used for producing wood-based plate, it is possible to decrease the burst size of methanal of wood-based plate.
Above-described moistureproof composite urea formaldehyde resin adhesive, the function of each raw material is as follows:
Cyanurotriamide modified urea resin, for adhesive major ingredient.Urea-formaldehyde resin adhesive is a kind of thermosetting polymer adhesive.
Owing to its technique is simple, cheaper starting materials, the advantages such as adhesive strength is high, water white transparency, be widely used in plywood, particieboard,
The industries such as medium density fibre board (MDF), the production of artificial board and interior decoration, can buy in Market of Adhesives.Band ring molecule
Tripolycyanamide introduce in Lauxite, form tridimensional network, enclose many hydrophilic groups, change resin matrix knot
Structure, promotes resin crosslinks, thus has reached to improve the adhesion strength of resin, resistance to water and the purpose of ageing resistance, the most again
Avoid the shortcoming that simple melamine resin is relatively costly.
Oxytarch be starch in acid, alkali, neutral medium with oxidant effect, make starch oxidation and a kind of change of obtaining
Property starch.Oxytarch product colour is pure white, sticks with paste transparent, good film-forming property, and freeze-thaw resistance is good, is the thickening of low viscosity high concentration
Agent, is widely used in weaving, papermaking, food and Fine Chemical.Oxytarch, can be multiple with more aldehyde radical and carboxyl
During closing Lauxite polymer reaction, generate acetal and hemiacetal structure, thus improve the ageing-resistant performance of Lauxite；
Simultaneous oxidation starch can be combined with the free formaldehyde in cyanurotriamide modified urea resin, can reduce free formaldehyde content；Oxidation
On the other hand starch, can reduce cyanurotriamide modified urea resin addition as viscosity complexing agent again, reduce and produce
Cost.
Polyvinyl alcohol, for toughener so that the wood-based plate intensity produced increases.
Magnesium oxide, for antioxidant so that the wood-based plate produced is not easy to go bad, and extends the life-span, anti-aging, it is possible to
To increase viscosity.
Propanediol polyoxypropylene polyvinylether, for defoamer, prevents adhesive from having bubble cavity to produce during using.
Hexamethylenetetramine and isocyanuric acid three-glycidyl ester are firming agent.
Bridging agent, selects VTES, and its one end can be combined with Lauxite carbonyl, and the other end can be with
The hydroxy combining of starch, strengthens its plank intensity.
The equal uniform flow that a kind of content of wax that paraffin wax emulsions is various waxes including pertroleum wax to be made through physical modification is aqueous
Body, the solid-oil-water being made up through emulsion reaction with several variety classeses, the emulsifying agent of performance and suitable regulator of paraffin
The stable emulsion of heterogeneous dispersion.Paraffin wax emulsions mixes together with sizing material, makes plank have a water resisting property and improves surface light
Cleanliness.Owing to paraffin wax emulsions granularity is little, in wood-based plate manufacture process, by breakdown of emulsion effectively, small Wax particles can be made
Separate out from aqueous phase, adsorb equably on the wood fiber, in developed country, can not find one piece of wood shavings produced without emulsifing wax
Plate and fibre board.
Present invention adds paraffin wax emulsions, the moistureproof composite urea formaldehyde resin adhesive making production obtain can reduce wood-based plate
Depth of moisture absorption of expansion ratio.And inventor passes through contrast test, add in producing urea-formaldehyde resin adhesive used for shaving board
Paraffin wax emulsions, can be obviously improved the water proofing property of particieboard, and depth of moisture absorption of expansion ratio averagely reduces by more than 40%, and other every things
Reason index change is inconspicuous.
Lignin molecular mass after phenolate is reacted reduces, and increases reaction active groups, can eliminate part free formaldehyde.
The preparation method of phenolate lignin is: is placed in separation container by the black liquid using alkaline boiling method slurrying, removes with screen cloth
Undissolved float, settles 4 hours after stirring, discharge lower floor silt, takes the upper strata black liquor vacuum drying containing alkali lignin
Machine carries out vacuum spray drying process, obtains powdery alkali lignin；Take powdery alkali lignin and put in acidifier, add
70wt% sulphuric acid, after stirring, is warming up to 140-160 DEG C, sulfonating reaction 1-2 hour；Evaporate through standard vertical-tubes
Device, circulation rate is 0.4m/s-0.5m/s, and controlling discharging moisture is 30wt%, precipitation, through filtering, being dried to water content
For 15wt%；By lignin: phenol weight ratio is 1:1 addition phenol, control temperature 85-95 DEG C, insulation reaction 1 hour,
Finally i.e. obtain phenolate lignin with 30wt% sodium hydroxide regulation pH to 6.5-7.0.
The preparation of described Oxytarch:
(1), select glass apparatus and assemble synthesizer:
JJ600 electronic balance；Digital display thermostat water bath；Digital display constant speed stirrer；There-necked flask；Electric heating constant-temperature blowing drying box；
NDJ-79 Rotary Viscosimeter.
(2) reagent chemicals:
Raw material: tapioca (moisture 13.8%)；
Reagent: hydrogen peroxide (30%), Copper hydrate, copper sulfate, sodium sulfite (being AR).
(3) preparation principle:
Starch is under oxidant effect, and the hydroxyl oxidable one-tenth carboxyl (-COOH) on glucose unit, it makes binding agent
Stability be improved significantly.Oxidation decreases the quantity of hydroxyl in starch molecule, makes molecular association be obstructed, thus subtracts
The weak binding ability of intermolecular hydrogen chain.Meanwhile, glucosides chain break, make macromolecules degradation, starch molecule amount reduces, thus increases
Dissolubility, mobility and caking property are added.In the presence of liquid caustic soda, the hydroxy combining not oxidized with starch, destroy part hydrogen
Key, makes declines between macromole, thus easy swelling gelatinizing, give its caking property.
Preparation process is as follows:
Weighing 200g tapioca in 1000mL there-necked flask, add water furnishing 18～the starch milk of 21 ° of B é, stirs, slowly
The slow sodium hydroxide solution dripping a certain amount of 5%～7% concentration.After water-bath rises to design temperature, add the copper sulfate of 0.01%.So
A certain amount of hydrogen peroxide of rear addition, after isothermal reaction certain time, adds 0.4g sodium sulfite, and stirring 10min terminates reaction.
Reaction terminate after, with in dilute hydrochloric acid and reacting liquid pH value be 5.5～6.0.Sucking filtration is dehydrated, washes clean, places 40-50 in baking oven
Dry at DEG C, pulverize, sieve and i.e. obtain product.The Oxytarch of above-mentioned use can produce with jumbo reactor.
The production method of a kind of moistureproof composite urea formaldehyde resin: first the clear water of parts by weight is put in reactor, is heated to
80-100 DEG C, it is subsequently adding the magnesium oxide of parts by weight, VTES and propanediol polyoxypropylene polyvinylether,
Stir 10 minutes to 30 minutes, add the polyvinyl alcohol of parts by weight, phenolate lignin, be allowed to dissolve, add weight portion
The cyanurotriamide modified urea resin of number and Oxytarch, keep 80-90 DEG C of stirring reaction 2-5 hour, and 10-20 divides before use
Clock adds the hexamethylenetetramine of parts by weight, isocyanuric acid three-glycidyl ester and anti-blushing agent, and mixing and stirring can make
With.
Compared with prior art, the positive effect of the present invention is:
1, in the present invention, using cyanurotriamide modified urea resin as adhesive major ingredient, have technique simple, raw material is honest and clean
Valency, the advantages such as adhesive strength is high, water white transparency, and the release of low formaldehyde gas, it is a kind of environmental type resin, urea can be improved
The resistance to water of urea formaldehyde, and prevent from glue-line from shrinking reducing internal stress, improve ageing-resistant performance, increases glue solid content, viscosity and just
Viscosity, extends working life.And to use magnesium oxide be antioxidant so that the particieboard produced is not easy to go bad, extend the longevity
Life, anti-aging, it is also possible to increase viscosity；Employing polyvinyl alcohol is toughener so that the wood-based plate intensity produced increases；Adopt
Use propanediol polyoxypropylene polyvinylether, for defoamer, prevent adhesive from during using, having bubble cavity to produce；Use six Asias
Tetramine and isocyanuric acid three-glycidyl ester are firming agent；Select VTES as bridging agent, one
End can be combined with Lauxite carbonyl, and the other end can strengthen its plank intensity with the hydroxy combining of starch；Phenolate lignin contains
There is a large amount of active group, as formaldehyde catching agent, part free formaldehyde can be eliminated；Use Oxytarch, be combined as viscosity
Agent, can reduce cyanurotriamide modified urea resin addition, cost-effective；Employing paraffin wax emulsions is as anti-blushing agent, due to stone
Wax emulsion particle degree is little, in wood-based plate manufacture process, by breakdown of emulsion effectively, small Wax particles can be made to analyse from aqueous phase
Go out, adsorb on the wood fiber equably, and paraffin wax emulsions has the feature of the depth of moisture absorption of expansion ratio reducing wood-based plate.
2, the moistureproof composite urea formaldehyde resin that the inventive method production obtains is waterproof, humidity resistance good, as the master of wood-based plate
Want binding agent, it is possible to increase the sealing property of wood-based plate, make moisture, moisture be difficult to penetrate into inside wood-based plate, improve wood-based plate
Resistance to water, solves the wood-based plate poor water resistance that the raw materials such as current all kinds of straw, shuck are made, poor because producing expansive force after moisture absorption
Different and the problem that makes bow warping deform.
Detailed description of the invention
Embodiment 1
A kind of moistureproof composite urea formaldehyde resin, including the raw material of following parts by weight:
Cyanurotriamide modified urea resin 50 parts；
Oxytarch 20 parts；
Polyvinyl alcohol 1 part；
Magnesium oxide 3 parts；
Propanediol polyoxypropylene polyvinylether 2 parts；
Hexamethylenetetramine 2 parts；
Isocyanuric acid three-glycidyl ester 1 part；
VTES 0.5 part；
Phenolate lignin 5 parts；
100 parts of clear water；
Anti-blushing agent 2 parts.
Cyanurotriamide modified urea resin described in the present embodiment uses the melamine modified urea-formaldehyde tree bought on market
Fat.
Described anti-blushing agent is paraffin wax emulsions, uses the product that Ren Xin plastic molding and processing plant of Wenan County produces.
The production method of a kind of moistureproof composite urea formaldehyde resin: first the clear water of parts by weight is put in reactor, is heated to
80 DEG C, it is subsequently adding the magnesium oxide of parts by weight, VTES and propanediol polyoxypropylene polyvinylether, stirring
10 minutes, add the polyvinyl alcohol of parts by weight, phenolate lignin, be allowed to dissolve, add the tripolycyanamide of parts by weight
Modified urea-formaldehyde resin and Oxytarch, keep 80 DEG C of stirring reactions 2 hours, within 10-20 minute before use, add parts by weight
Hexamethylenetetramine, isocyanuric acid three-glycidyl ester and anti-blushing agent, mixing and stirring can use.
Embodiment 2
A kind of moistureproof composite urea formaldehyde resin, including the raw material of following parts by weight:
Cyanurotriamide modified urea resin 70 parts；
Oxytarch 24 parts；
Polyvinyl alcohol 2 parts；
Magnesium oxide 5 parts；
Propanediol polyoxypropylene polyvinylether 2.4 parts；
Hexamethylenetetramine 2.4 parts；
Isocyanuric acid three-glycidyl ester 1.4 parts；
VTES 2 parts；
Phenolate lignin 7 parts；
140 parts of clear water；
Anti-blushing agent 3 parts.
Cyanurotriamide modified urea resin described in the present embodiment uses Guangxi Nanning Green Park Beilin Wood Industry Co., Ltd. to grind
The cyanurotriamide modified urea resin studied carefully.
Described anti-blushing agent is paraffin wax emulsions, uses the product that Ren Xin plastic molding and processing plant of Wenan County produces.
The production method of a kind of moistureproof composite urea formaldehyde resin: first the clear water of parts by weight is put in reactor, is heated to
85 DEG C, it is subsequently adding the magnesium oxide of parts by weight, VTES and propanediol polyoxypropylene polyvinylether, stirring
20 minutes, add the polyvinyl alcohol of parts by weight, phenolate lignin, be allowed to dissolve, add the tripolycyanamide of parts by weight
Modified urea-formaldehyde resin and Oxytarch, keep 85 DEG C of stirring reactions 3.5 hours, within 10-20 minute before use, add parts by weight
Hexamethylenetetramine, isocyanuric acid three-glycidyl ester and anti-blushing agent, mixing and stirring can use.
Embodiment 3
A kind of moistureproof composite urea formaldehyde resin, including the raw material of following parts by weight:
Cyanurotriamide modified urea resin 80 parts；
Oxytarch 27 parts；
Polyvinyl alcohol 2.5 parts；
Magnesium oxide 7 parts；
Propanediol polyoxypropylene polyvinylether 2.7 parts；
Hexamethylenetetramine 2.7 parts；
Isocyanuric acid three-glycidyl ester 1.7 parts；
VTES 4 parts；
Phenolate lignin 9 parts；
1700 parts of clear water；
Anti-blushing agent 4 parts.
Cyanurotriamide modified urea resin described in the present embodiment uses the melamine modified urea-formaldehyde tree bought on market
Fat.
Described anti-blushing agent is paraffin wax emulsions, uses the product that Ren Xin plastic molding and processing plant of Wenan County produces.
The production method of a kind of moistureproof composite urea formaldehyde resin: first the clear water of parts by weight is put in reactor, is heated to
95 DEG C, it is subsequently adding the magnesium oxide of parts by weight, VTES and propanediol polyoxypropylene polyvinylether, stirring
25 minutes, add the polyvinyl alcohol of parts by weight, phenolate lignin, be allowed to dissolve, add the tripolycyanamide of parts by weight
Modified urea-formaldehyde resin and Oxytarch, keep 88 DEG C of stirring reactions 4 hours, within 10-20 minute before use, add parts by weight
Hexamethylenetetramine, isocyanuric acid three-glycidyl ester and anti-blushing agent, mixing and stirring can use.
Embodiment 4
A kind of moistureproof composite urea formaldehyde resin, including the raw material of following parts by weight:
Cyanurotriamide modified urea resin 100 parts；
Oxytarch 30 parts；
Polyvinyl alcohol 3 parts；
Magnesium oxide 8 parts；
Propanediol polyoxypropylene polyvinylether 3 parts；
Hexamethylenetetramine 3 parts；
Isocyanuric acid three-glycidyl ester 2 parts；
VTES 5 parts；
Phenolate lignin 10 parts；
200 parts of clear water；
Anti-blushing agent 5 parts.
Cyanurotriamide modified urea resin described in the present embodiment uses Guangxi Nanning Green Park Beilin Wood Industry Co., Ltd. to grind
The cyanurotriamide modified urea resin studied carefully.
Described anti-blushing agent is paraffin wax emulsions, uses the product that Ren Xin plastic molding and processing plant of Wenan County produces.
The production method of a kind of moistureproof composite urea formaldehyde resin: first the clear water of parts by weight is put in reactor, is heated to
100 DEG C, it is subsequently adding the magnesium oxide of parts by weight, VTES and propanediol polyoxypropylene polyvinylether, stirs
Mix 30 minutes, add the polyvinyl alcohol of parts by weight, phenolate lignin, be allowed to dissolve, add the melamine of parts by weight
Amine modified urea-formaldehyde resin and Oxytarch, keep 90 DEG C of stirring reactions 5 hours, within 10-20 minute before use, add parts by weight
Hexamethylenetetramine, isocyanuric acid three-glycidyl ester and anti-blushing agent, mixing and stirring can use.
Comparative example 4
A kind of composite urea formaldehyde resin, including the raw material of following parts by weight:
Cyanurotriamide modified urea resin 100 parts；
Oxytarch 30 parts；
Polyvinyl alcohol 3 parts；
Magnesium oxide 8 parts；
Propanediol polyoxypropylene polyvinylether 3 parts；
Hexamethylenetetramine 3 parts；
Isocyanuric acid three-glycidyl ester 2 parts；
VTES 5 parts；
Phenolate lignin 10 parts；
200 parts of clear water.
The production method of a kind of composite urea formaldehyde resin: first the clear water of parts by weight is put in reactor, is heated to 100
DEG C, it is subsequently adding the magnesium oxide of parts by weight, VTES and propanediol polyoxypropylene polyvinylether, stirs 30
Minute, adding the polyvinyl alcohol of parts by weight, phenolate lignin, be allowed to dissolve, the tripolycyanamide adding parts by weight changes
Property Lauxite and Oxytarch, keep 90 DEG C of stirring reactions 5 hours, add parts by weight in 10-20 minute before use six
Methenamine and isocyanuric acid three-glycidyl ester, mixing and stirring can use.
The compound urea aldehyde that moistureproof composite urea formaldehyde resin adhesive obtained by embodiment 1-4 and comparative example 4 are prepared
Resin carries out the mensuration of the residual quantity of formaldehyde respectively, and detects glued strong according to the regulation in GB/T9846.1-9846.8-2004
Degree.Formaldehyde determination uses acetylacetone,2,4-pentanedione spectrophotography, residual formaldehyde %=measured value/example weight × %, 25mm), according to
GB/T4897.7-2003 detects particieboard 24h thickness swelling rate, and result is as shown in the table: result is as shown in the table:
The embodiment 4 difference from comparative example 4 is, embodiment 4 adds anti-blushing agent；And comparative example 4 does not add
Enter anti-blushing agent.But by the data of embodiment 4 and comparative example 4 it can be seen that both residual formaldehyde and bonding strength
Physical index change inconspicuous, but 24 expansion rate of water absorption but differ bigger, the expansion rate of water absorption of embodiment 4 is 0.35%,
24 expansion rate of water absorption of comparative example 4 are 0.60%, and the expansion rate of water absorption of embodiment 4 reduces 41.7% than comparative example 4.
In the present invention, use paraffin wax emulsions as anti-blushing agent, owing to paraffin wax emulsions granularity is little, in wood-based plate manufacture process, lead to
Cross breakdown of emulsion effectively, small Wax particles can be made to separate out from aqueous phase, adsorb on the wood fiber equably, and paraffin wax emulsions tool
There is the feature of the depth of moisture absorption of expansion ratio reducing wood-based plate.
Relative with the Moisture-proof urea-formaldehyde resin adhesive data of Application No. 201310379676.1 from the data of embodiment 1-4
Ratio, finds that the moistureproof composite urea formaldehyde resin 24h expansion rate of water absorption of the present invention and bonding strength are slightly better than Application No.
The Moisture-proof urea-formaldehyde resin adhesive of 201310379676.1, it it is critical only that the adhesive major ingredient of the present invention is cyanurotriamide modified
Lauxite, and the Moisture-proof urea-formaldehyde resin adhesive of Application No. 201310379676.1, its Lauxite is not through trimerization
Cyanamide is modified.Because the tripolycyanamide of band ring molecule is incorporated in Lauxite, tridimensional network can be formed, enclose
Many hydrophilic groups, change resin backbone structure, promote resin crosslinks, thus reached to improve resin adhesion strength,
Resistance to water and the purpose of ageing resistance.So, through cyanurotriamide modified Lauxite, its waterproof and dampproof aspect of performance is superior to
Not through the Lauxite of cyanurotriamide modified mistake.
By upper table it can also be seen that the urea aldehyde that is below on market of the moistureproof composite urea formaldehyde resin residual formaldehyde of the present invention
Resin, uses safety coefficient high, and bonding strength is the most excellent relative to Lauxite；Meanwhile, the protection against the tide of the present invention is combined urea aldehyde
Resin adhesive humidity resistance is high compared with the Lauxite on market.Visible, the moistureproof composite urea formaldehyde resin adhesive of the present invention is not
Only there is the advantages such as high, the use safety of bonding strength, and resistance to water is strong, reaches moistureproof adhesive and uses standard.
Claims (3)
1. a moistureproof composite urea formaldehyde resin, it is characterised in that: include the raw material of following parts by weight:
Cyanurotriamide modified urea resin 50～100 parts；
Oxytarch 20～30 parts；
Polyvinyl alcohol 1～3 parts；
Magnesium oxide 3～8 parts；
Propanediol polyoxypropylene polyvinylether 2～3 parts；
Hexamethylenetetramine 2～3 parts；
Isocyanuric acid three-glycidyl ester 1～2 parts；
VTES 0.5～5 parts；
Phenolate lignin 5～10 parts；
Clear water 100～200 parts；
Anti-blushing agent 2～5 parts.
Moistureproof composite urea formaldehyde resin the most according to claim 1, it is characterised in that: described anti-blushing agent is paraffin wax emulsions,
Use the product that Ren Xin plastic molding and processing plant of Wenan County produces.
Moistureproof composite urea formaldehyde resin the most according to claim 1, it is characterised in that: the production of this protection against the tide composite urea formaldehyde resin
Method: first the clear water of parts by weight is put in reactor, is heated to 80-100 DEG C, be subsequently adding parts by weight magnesium oxide,
VTES and propanediol polyoxypropylene polyvinylether, stir 10 minutes to 30 minutes, add parts by weight
Polyvinyl alcohol, phenolate lignin, be allowed to dissolve, add parts by weight cyanurotriamide modified urea resin and oxidation form sediment
Powder, keeps 80-90 DEG C of stirring reaction 2-5 hour, the hexamethylenetetramine, different adding parts by weight in 10-20 minute before use
Cyanuric acid three-glycidyl ester and anti-blushing agent, mixing and stirring can use.
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| CN201610746060.7A CN106281157A (en) | 2016-08-29 | 2016-08-29 | Moistureproof composite urea formaldehyde resin and production method thereof |
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| CN201610746060.7A CN106281157A (en) | 2016-08-29 | 2016-08-29 | Moistureproof composite urea formaldehyde resin and production method thereof |
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Application publication date: 20170104 |