CN113667411A - Plywood surface adhesive capable of improving water resistance - Google Patents
Plywood surface adhesive capable of improving water resistance Download PDFInfo
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- CN113667411A CN113667411A CN202110979191.0A CN202110979191A CN113667411A CN 113667411 A CN113667411 A CN 113667411A CN 202110979191 A CN202110979191 A CN 202110979191A CN 113667411 A CN113667411 A CN 113667411A
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- 239000011120 plywood Substances 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 239000000853 adhesive Substances 0.000 title claims description 23
- 230000001070 adhesive effect Effects 0.000 title claims description 23
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims abstract description 84
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 53
- 239000003292 glue Substances 0.000 claims abstract description 37
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 31
- AGPKZVBTJJNPAG-WHFBIAKZSA-N L-isoleucine Chemical compound CC[C@H](C)[C@H](N)C(O)=O AGPKZVBTJJNPAG-WHFBIAKZSA-N 0.000 claims abstract description 25
- 229960000310 isoleucine Drugs 0.000 claims abstract description 25
- AGPKZVBTJJNPAG-UHFFFAOYSA-N isoleucine Natural products CCC(C)C(N)C(O)=O AGPKZVBTJJNPAG-UHFFFAOYSA-N 0.000 claims abstract description 25
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 24
- NHARPDSAXCBDDR-UHFFFAOYSA-N propyl 2-methylprop-2-enoate Chemical compound CCCOC(=O)C(C)=C NHARPDSAXCBDDR-UHFFFAOYSA-N 0.000 claims abstract description 24
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims abstract description 24
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims abstract description 24
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 23
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000012948 isocyanate Substances 0.000 claims abstract description 19
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 19
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003513 alkali Substances 0.000 claims abstract description 17
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 16
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 16
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 15
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 77
- 238000003756 stirring Methods 0.000 claims description 45
- 238000005303 weighing Methods 0.000 claims description 28
- 238000002360 preparation method Methods 0.000 claims description 19
- OWIKHYCFFJSOEH-UHFFFAOYSA-N Isocyanic acid Chemical compound N=C=O OWIKHYCFFJSOEH-UHFFFAOYSA-N 0.000 claims description 7
- XLJMAIOERFSOGZ-UHFFFAOYSA-N anhydrous cyanic acid Natural products OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 18
- 230000000694 effects Effects 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 11
- 239000002023 wood Substances 0.000 description 10
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 8
- 229920001807 Urea-formaldehyde Polymers 0.000 description 5
- 230000002209 hydrophobic effect Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 235000019270 ammonium chloride Nutrition 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical group CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- XLSZMDLNRCVEIJ-UHFFFAOYSA-N methylimidazole Natural products CC1=CNC=N1 XLSZMDLNRCVEIJ-UHFFFAOYSA-N 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
Abstract
The invention discloses plywood surface glue for improving water resistance, which comprises the following raw materials of phenol, formaldehyde, alkali, isoleucine, propyl methacrylate, sodium hexametaphosphate, polytetrafluoroethylene, a cross-linking agent and a curing agent, wherein the alkali is one or more of sodium hydroxide, ammonia water and potassium hydroxide, the cross-linking agent is a mixture of acrylic acid and divinyl benzene, and the curing agent is a mixture of imidazole and isocyanate. The invention uses the latent curing agent, the surface glue is cured more quickly, the convenient surface is smoother, and the invention has waterproof performance, can be used in a humid environment for a long time, improves the water resistance of the plate, prolongs the service life, reduces the resource consumption, saves energy and protects environment.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of preparation of plywood adhesives, and particularly relates to a plywood surface adhesive for improving water resistance.
[ background of the invention ]
Plywood is a three-layer or multi-layer plate-shaped raw material formed by rotary cutting wood sections or veneer or slicing square wood into thin wood and then gluing the thin wood by using an adhesive, and is an industrial board formed by using odd-numbered veneers and mutually and vertically gluing the fiber directions of adjacent veneers. Usually, the surface plate and the inner plate are symmetrically arranged on two sides of the central layer or the core, and the glued single plates are pressed into a plate blank which is formed by criss-cross matching according to the wood grain direction under the condition of heating or not heating. The plywood can improve the utilization rate of the wood and is a main way for saving the wood.
The rapid growth of Chinese economy becomes a strong muscle traction force for promoting the market demand of plywood; the fast-growing and high-yield forest wood in North China, east China and the middle and lower reaches of Yangtze river is greatly popularized to the market, and high-quality broad-leaved wood at home and abroad is continuously supplemented, so that rich raw materials are provided for the continuous development of the Chinese plywood industry; sufficient human resources are also important factors for cost accounting of the plywood industry developed in China compared with other plywood producing countries. The quality of the Chinese plywood product is greatly improved, the competitiveness is stronger and stronger in the international market, and China not only exports a large country but also produces the large country by the first large plywood in the world.
With the continuous emergence and the rise of the plywood industry, more and more pay attention to the quality of plywood, not only need promote the output, still need promote the quality of plywood, in the preparation plywood, not only use good adhesive preparation plywood, still need consider the protection of plywood surface, in long-term use, because the board of surface exposes more, the surface of plywood can all take place the worm eaten, rot, or by water corrosion scheduling problem in humid environment. The common surface glue only considers the insect prevention problem of the plywood, the environment in the south is humid, after long service time, the phenomena of expansion, deformation and the like caused by water absorption can occur, the waterproof performance is lower, the surface smoothness is low, and the service time is short.
The Chinese patent application No. 201611238019.5 discloses a building template manufacturing process, wherein in the step (5) of claim 1, the surface glue is prepared by adding corn flour as a filler into urea-formaldehyde resin, wherein the addition amount of the filler per 100kg of urea-formaldehyde glue is 10-15kg, fully stirring for 20-25 minutes, adding ammonium chloride as a curing agent, the addition amount of the ammonium chloride per 100kg of urea-formaldehyde glue is 0.5-1.2kg, fully stirring for 25-30 minutes, adding a flame retardant, the addition amount of the flame retardant economy of per 100kg of urea-formaldehyde glue is 5-10kg, fully stirring for 30-335 minutes, adding a brightener, and the addition amount of the brightener per 100kg of the brightener of urea-formaldehyde glue is 0.5-1.0kg, and fully stirring to form the surface glue. The flame retardant and the brightener are added into the surface adhesive, so that the fire resistance of the building template is improved, but the hydrophobic property of the surface of the building template is not improved, and the surface of the building template used as the building template is exposed to the environment for a long time in the using process and also deforms due to surface water absorption and expansion, so that the surface smoothness of the building template is influenced, and the performance of the building template is influenced.
[ summary of the invention ]
The invention aims to provide a plywood surface adhesive capable of improving internal water performance, and aims to solve the problems that the existing plywood is easy to absorb water in a humid environment in the south to cause expansion and deformation, long in curing time, not smooth enough in surface, easy to store water in air and the like.
In order to solve the technical problems, the invention adopts the following technical scheme:
the plywood surface glue for improving the water resistance comprises, by weight, 1800 parts of phenol 800-1800 parts, 1600 parts of formaldehyde, 50-150 parts of alkali, 8-16 parts of isoleucine, 8-16 parts of propyl methacrylate, 4-8 parts of sodium hexametaphosphate, 30-40 parts of polytetrafluoroethylene, 15-25 parts of a cross-linking agent and 10-15 parts of a curing agent, wherein the alkali is one or more of sodium hydroxide, ammonia water and potassium hydroxide, the cross-linking agent is a mixture of acrylic acid and divinylbenzene, and the curing agent is a mixture of imidazole and isocyanate.
Further, the cross-linking agent comprises the following raw materials, by weight, 5-10 parts of acrylic acid and 10-15 parts of divinylbenzene.
Furthermore, the curing agent comprises the following raw materials, by weight, 5-7 parts of imidazole and 5-8 parts of isocyanate.
Further, the compound comprises the following raw materials, by weight, 10-14 parts of isoleucine, 10-14 parts of propyl methacrylate and 5-7 parts of sodium hexametaphosphate.
A preparation method of plywood surface glue for improving water resistance comprises the following steps:
s1: weighing 1800 parts of phenol 800-;
s2: weighing 15-25 parts of a cross-linking agent by weight, wherein 5-10 parts of acrylic acid and 10-15 parts of divinylbenzene, adding the cross-linking agent into a reaction kettle, raising the temperature and continuously stirring;
s3: weighing 30-40 parts of polytetrafluoroethylene, 8-16 parts of isoleucine, 8-16 parts of propyl methacrylate and 4-8 parts of sodium hexametaphosphate in parts by weight, and adding into a reaction kettle;
s4: weighing 10-15 parts of curing agent by weight, wherein 5-7 parts of imidazole and 5-8 parts of isocyanate, after the stirring in the step S3 is completed, reducing the delivery of high-temperature steam into the reaction kettle, adding the curing agent into the reaction kettle after the temperature is stably reduced, stirring for 0.3-0.5h, and cooling the temperature in the reaction kettle to room temperature to obtain the high-water-resistance surface adhesive.
Further, the temperature in the reaction kettle is controlled to be 40-55 ℃ in the S1, and the reaction time is 0.5-0.8 h.
Further, the amount of the clear water added in the S1 is 700-800 parts by weight.
Further, the temperature is raised to 110-140 ℃ in S2.
Further, the curing agent in S4 is prepared by mixing imidazole and isocyanic acid in a small reaction kettle, raising the temperature to 60-75 ℃, and slowly stirring for reaction for 0.3-0.5 h.
Further, the temperature in S4 was decreased to 30-40 ℃, and the stirring speed in S1-S4 was set to 120-150 rpm.
The invention has the following beneficial effects:
(1) according to the invention, isoleucine, propyl methacrylate and sodium hexametaphosphate are used as raw materials and added into the reaction kettle together, a synergistic effect is generated in the preparation of the surface glue of the plywood, the waterproof performance of the surface glue of the plywood is synergistically improved, the propyl methacrylate and the sodium hexametaphosphate can form a high-elasticity waterproof film on the surface of the surface glue, the high-elasticity waterproof film has good elasticity and deformation-preventing capability, meanwhile, the isoleucine has high hydrophobic performance, the polytetrafluoroethylene also has super-strong hydrophobic capability, the moisture is further prevented from invading into the plywood, a strong anti-seepage layer is formed on the surface of the plywood, and the effect of improving the waterproof performance is achieved;
(2) in the invention, imidazole and isocyanate are used for reacting to obtain an addition product which is a latent curing agent, and in the preparation of the added surface adhesive, the prepared adhesive can be stored for a time of interaction under an experimental environment, and the curing agent is rapidly cured when the temperature is higher than 40 ℃, and the cured surface is very smooth, so that two adjacent plywood plates cannot be adhered, and the smooth surface can prevent the plywood plates from storing water vapor in the air;
(3) the adhesive disclosed by the invention is fast in curing, strong in hydrophobic property, smooth in adhesive curing surface, suitable for being used in various veneers, long in time even in a humid environment, long in service life, energy-saving and environment-friendly, and does not drop adhesive; the preparation process is simple and convenient, and is suitable for industrial and industrialized production.
[ detailed description ] embodiments
For a better understanding of the present invention, the invention is further explained below in conjunction with specific embodiments, it should be emphasized that the following is merely exemplary and is not intended to limit the scope of the invention and its applications, and any equivalent changes or substitutions made on this basis fall within the scope of the invention.
Example 1
The plywood surface glue for improving the water resistance comprises the following raw materials, by weight, 800 parts of phenol, 1600 parts of formaldehyde, 50 parts of sodium hydroxide, 8 parts of isoleucine, 8 parts of propyl methacrylate, 4 parts of sodium hexametaphosphate, 40 parts of polytetrafluoroethylene, 15 parts of a cross-linking agent and 15 parts of a curing agent, wherein the cross-linking agent is 5 parts of acrylic acid, 10 parts of divinylbenzene, 7 parts of imidazole as the curing agent and 8 parts of isocyanate.
The preparation method of the surface glue comprises the following steps:
s1: weighing 800 parts of phenol, 1600 parts of formaldehyde and 50 parts of sodium hydroxide by weight, firstly adding alkali into a reaction kettle, setting the stirring speed to be 120rpm, continuously stirring, introducing high-temperature steam into the reaction kettle, controlling the temperature in the reaction kettle to be 40 ℃, adding phenol into the reaction kettle, continuously stirring, reacting for 0.8h, adding alkali into the reaction kettle, and simultaneously adding 700 parts of clear water;
s2: weighing a cross-linking agent by taking parts by weight as a unit, wherein 5 parts of acrylic acid and 10 parts of divinyl benzene are added into a reaction kettle, raising the temperature and continuously stirring;
s3: weighing 40 parts of polytetrafluoroethylene, 8 parts of isoleucine, 8 parts of propyl methacrylate and 4 parts of sodium hexametaphosphate in parts by weight, and adding into a reaction kettle;
s4: weighing 7 parts of imidazole and 8 parts of isocyanate by weight, after stirring in the step S3, reducing the delivery of high-temperature steam into a reaction kettle, adding the curing agent into the reaction kettle after the temperature is reduced to 30 ℃ and stabilized, stirring for 0.5h, and cooling the temperature in the reaction kettle to room temperature to obtain the high-water-resistance surface adhesive;
the preparation method of the curing agent comprises the following steps: imidazole and isocyanic acid are mixed in a small reaction kettle, the temperature is increased to 75 ℃, and the reaction is slowly stirred for 0.3 h.
Example 2
The plywood surface glue for improving the water resistance comprises the following raw materials, by weight, 1800 parts of phenol, 2500 parts of formaldehyde, 150 parts of ammonia water, 16 parts of isoleucine, 16 parts of propyl methacrylate, 8 parts of sodium hexametaphosphate, 30 parts of polytetrafluoroethylene, 25 parts of a cross-linking agent and 10 parts of a curing agent, wherein the cross-linking agent is 10 parts of acrylic acid, 15 parts of divinylbenzene, 5 parts of imidazole as the curing agent and 5 parts of isocyanate.
The preparation method of the surface glue comprises the following steps:
s1: weighing 1800 parts of phenol, 2500 parts of formaldehyde and 150 parts of ammonia water by weight, firstly adding alkali into a reaction kettle, setting the stirring speed to be 150rpm, continuously stirring, introducing high-temperature steam into the reaction kettle, controlling the temperature in the reaction kettle to be 55 ℃, adding phenol into the reaction kettle, continuously stirring, reacting for 0.5h, adding alkali into the reaction kettle, and simultaneously adding 800 parts of clear water;
s2: weighing a crosslinking agent by taking parts by weight as a unit, adding the crosslinking agent into a reaction kettle, raising the temperature and continuously stirring, wherein 10 parts of acrylic acid and 15 parts of divinyl benzene are added;
s3: weighing 30 parts of polytetrafluoroethylene, 16 parts of isoleucine, 16 parts of propyl methacrylate and 8 parts of sodium hexametaphosphate in parts by weight, and adding into a reaction kettle;
s4: weighing a curing agent by weight part, wherein 5 parts of imidazole and 5 parts of isocyanate, after stirring in the step S3, reducing the delivery of high-temperature steam into a reaction kettle, adding the curing agent into the reaction kettle after the temperature is reduced to 40 ℃ and stabilized, stirring for 0.3h, and cooling the temperature in the reaction kettle to room temperature to obtain the high-water-resistance surface adhesive;
the preparation method of the curing agent comprises the following steps: mixing imidazole and isocyanic acid in a small reaction kettle, raising the temperature to 60 ℃, and slowly stirring to react for 0.5 h.
Example 3
The plywood surface glue for improving the water resistance comprises the following raw materials, by weight, 1500 parts of phenol, 2300 parts of formaldehyde, 80 parts of potassium hydroxide, 12 parts of isoleucine, 12 parts of propyl methacrylate, 6 parts of sodium hexametaphosphate, 35 parts of polytetrafluoroethylene, 20 parts of a cross-linking agent and 13 parts of a curing agent, wherein the cross-linking agent is 7 parts of acrylic acid, 13 parts of divinylbenzene, and the curing agent is 6 parts of imidazole and 7 parts of isocyanate.
The preparation method of the surface glue comprises the following steps:
s1: weighing 1500 parts of phenol, 2300 parts of formaldehyde and 80 parts of potassium hydroxide by weight, adding alkali into a reaction kettle, setting the stirring speed to be 150rpm, continuously stirring, introducing high-temperature steam into the reaction kettle, controlling the temperature in the reaction kettle to be 50 ℃, adding phenol into the reaction kettle, continuously stirring, reacting for 0.6h, adding alkali into the reaction kettle, and simultaneously adding 750 parts of clear water;
s2: weighing a cross-linking agent by taking parts by weight as a unit, adding the cross-linking agent into a reaction kettle, raising the temperature and continuously stirring, wherein 7 parts of acrylic acid and 13 parts of divinylbenzene are used as the unit;
s3: weighing 35 parts of polytetrafluoroethylene, 12 parts of isoleucine, 12 parts of propyl methacrylate and 6 parts of sodium hexametaphosphate in parts by weight, and adding into a reaction kettle;
s4: weighing 6 parts of imidazole and 7 parts of isocyanate, after stirring in the step S3, reducing the delivery of high-temperature steam into a reaction kettle, adding the curing agent into the reaction kettle after the temperature is reduced to 35 ℃ and stabilized, stirring for 0.4h, and cooling the temperature in the reaction kettle to room temperature to obtain the high-water-resistance surface adhesive;
the preparation method of the curing agent comprises the following steps: imidazole and isocyanic acid are mixed in a small reaction kettle, the temperature is increased to 70 ℃, and the reaction is slowly stirred for 0.4 h.
Example 4
The plywood surface glue for improving the water resistance comprises the following raw materials, by weight, 1600 parts of phenol, 2400 parts of formaldehyde, 120 parts of potassium hydroxide, 12 parts of isoleucine, 12 parts of propyl methacrylate, 6 parts of sodium hexametaphosphate, 38 parts of polytetrafluoroethylene, 22 parts of a cross-linking agent and 14 parts of a curing agent, wherein the cross-linking agent is 8 parts of acrylic acid, 14 parts of divinylbenzene, 77 parts of imidazole as the curing agent and 7 parts of isocyanate.
The preparation method of the surface glue comprises the following steps:
s1: weighing 1600 parts of phenol, 2400 parts of formaldehyde and 120 parts of potassium hydroxide by taking parts by weight as units, firstly adding alkali into a reaction kettle, setting the stirring speed to be 140rpm, continuously stirring, introducing high-temperature steam into the reaction kettle, controlling the temperature in the reaction kettle to be 43 ℃, adding phenol into the reaction kettle, continuously stirring, reacting for 0.7h, adding alkali into the reaction kettle, and simultaneously adding 760 parts of clear water;
s2: weighing a crosslinking agent by taking parts by weight as a unit, adding the crosslinking agent into a reaction kettle, raising the temperature and continuously stirring, wherein 8 parts of acrylic acid and 14 parts of divinylbenzene are taken as the unit;
s3: weighing 38 parts of polytetrafluoroethylene, 12 parts of isoleucine, 12 parts of propyl methacrylate and 6 parts of sodium hexametaphosphate in parts by weight, and adding into a reaction kettle;
s4: weighing 7 parts of curing agent by weight, namely 7 parts of imidazole and 7 parts of isocyanate, after stirring in the step S3, reducing the delivery of high-temperature steam into the reaction kettle, adding the curing agent into the reaction kettle after the temperature is reduced to 38 ℃ and stabilized, stirring for 0.4h, and cooling the temperature in the reaction kettle to room temperature to obtain the high-water-resistance surface adhesive;
the preparation method of the curing agent comprises the following steps: imidazole and isocyanic acid were mixed in a small reaction kettle and the temperature was raised to 68 ℃ and the reaction was stirred slowly for 0.4 h.
Example 5
The plywood surface glue for improving the water resistance comprises the following raw materials, by weight, 1300 parts of phenol, 2100 parts of formaldehyde, 110 parts of potassium hydroxide, 14 parts of isoleucine, 14 parts of propyl methacrylate, 8 parts of sodium hexametaphosphate, 34 parts of polytetrafluoroethylene, 22 parts of a cross-linking agent and 12 parts of a curing agent, wherein the cross-linking agent is 9 parts of acrylic acid, 13 parts of divinylbenzene, 5 parts of imidazole as the curing agent and 7 parts of isocyanate.
The preparation method of the surface glue comprises the following steps:
s1: weighing 1300 parts of phenol, 2100 parts of formaldehyde and 110 parts of alkali by weight, firstly adding the alkali into a reaction kettle, setting the stirring speed to be 130rpm, continuously stirring, introducing high-temperature steam into the reaction kettle, controlling the temperature in the reaction kettle to be 48 ℃, adding the phenol into the reaction kettle, continuously stirring, reacting for 0.6h, adding the alkali into the reaction kettle, and simultaneously adding 740 parts of clear water;
s2: weighing a crosslinking agent by taking parts by weight as a unit, adding the crosslinking agent into a reaction kettle, raising the temperature and continuously stirring, wherein 9 parts of acrylic acid and 13 parts of divinyl benzene are added;
s3: weighing 34 parts of polytetrafluoroethylene, 14 parts of isoleucine, 14 parts of propyl methacrylate and 8 parts of sodium hexametaphosphate in parts by weight, and adding into a reaction kettle;
s4: weighing 5 parts of imidazole and 7 parts of isocyanate by weight, after stirring in the step S3, reducing the delivery of high-temperature steam into a reaction kettle, adding the curing agent into the reaction kettle after the temperature is reduced to 35 ℃ and stabilized, stirring for 0.4h, and cooling the temperature in the reaction kettle to room temperature to obtain the high-water-resistance surface adhesive;
the preparation method of the curing agent comprises the following steps: imidazole and isocyanic acid were mixed in a small reaction kettle and the temperature was raised to 72 ℃ and the reaction was slowly stirred for 0.4 h.
Comparative example 1
Essentially the same as in example 3, except that isoleucine was absent from the starting material.
Comparative example 2
Essentially the same as in example 3, except that propyl methacrylate was absent from the starting material.
Comparative example 3
Essentially the same as in example 3, except that the starting material used was absent of sodium hexametaphosphate.
Comparative example 4
Substantially the same as in example 3, except that isoleucine, propyl methacrylate and sodium hexametaphosphate were absent from the starting materials used.
Comparative example 5
Essentially the same as in example 3, except that the curing agent of the present invention was replaced with a methylimidazole curing agent.
Comparative example 6
Substantially the same as in example 3, except that ammonium chloride was used as the curing agent in place of the curing agent of the present invention.
The surface glue of the plywood prepared in the embodiments 1-5 and the comparative examples 1-6 is applied to the plywood prepared by the same wood and the same process, the surface glue is prepared by cold pressing and hot pressing, the surface roughness is controlled to be similar, the performance of the surface glue is tested by referring to GB/T17657-2013 physicochemical property test method for artificial boards and decorative artificial boards, the formaldehyde release amount is determined by adopting a gas analysis method, and meanwhile, all indexes of the surface cracking condition of the plywood are also determined.
TABLE 1 veneer board 24h water absorption thickness expansion rate and various index test results
As can be seen from the above Table 1, in the plywood face glue prepared by using the present invention, the 24-hour water absorption thickness expansion rate of the examples 1-5 is controlled within 9%, taking example 3 as the most preferable example, the swelling ratio was 2% or less (10-8)%, as compared with comparative example 1 in which isoleucine was not added, the effect value of isoleucine in the veneer adhesive of the present invention was determined to be 2, and the effect value of propyl methacrylate was calculated to be 3 and the effect value of sodium hexametaphosphate was calculated to be 2 in the same manner, and the effect value of comparative example 4 lacking these three raw materials was calculated to be 8, the superposition of the effect values of the three raw materials is that 2+3+2 is 7 < 8, which is smaller than the effect value obtained by simultaneously using the three raw materials, the percentage of the increased effect value is calculated to be (8-7)/7 × 100% is 14.29%, and the increase of the effect value is obvious;
in the identification of results, the effect value M generated when the raw materials are used simultaneously is compared with the sum N of the effect values generated when a certain component is used alone, when the ratio of (M-N) ÷ N multiplied by 100% is equal to D, wherein when D is less than 0%, the combination is identified to generate negative influence, the generated effect is not equal to the addition of the effect values of the raw materials used alone, the raw materials are mutually limited and are not suitable for practical production, and when D is more than 0% and less than or equal to 10%, the combination generates positive influence, but because the influence is small, the effect is understood to be obvious within the error range of the test result, when D is more than or equal to 10%, the synergistic effect is generated in the reaction process of the adopted raw materials, and the effects among the raw materials are mutually supported, so that the final generated effect is improved;
in conclusion, the isoleucine, the propyl methacrylate and the sodium hexametaphosphate in the plywood produce a synergistic effect, so that the waterproof performance is improved, probably because the propyl methacrylate and the sodium hexametaphosphate can form a high-elasticity waterproof film, and meanwhile, the isoleucine has a hydrophobic side chain, so that the high-water-resistance protection is formed after combination, namely the waterproof performance of the plywood surface glue is synergistically improved by the three components.
In the invention, imidazole and isocyanate are used for preparing the curing agent, the imidazole curing agent has good moisture resistance and heat resistance and is very consistent with the water-resistant effect which is required by the invention, the curing time of the veneer glue of the plywood in the invention is controlled within 11min, but after the curing agent is replaced, the curing time of the methylimidazole curing agent used in the comparative example 5 is 20min, and the curing time of the ammonium chloride curing agent used in the comparative example 6 is 26min, so that the curing agent used in the invention has great advantages. The curing agent is generally called imidazole latent curing agent, has certain storage stability in a sealed environment in a cool environment, can be rapidly cured when the temperature is increased after the curing agent is used, and has short curing time and smoother surface.
The above description should not be taken as limiting the invention to the specific embodiments, but rather, as will be readily apparent to those skilled in the art from the following description, numerous modifications and substitutions can be made without departing from the spirit of the invention and these are deemed to be within the scope of the invention as defined by the claims appended hereto.
Claims (10)
1. The plywood surface glue for improving the water resistance is characterized by comprising the following raw materials, by weight, 800-1800 parts of phenol, 1600-2500 parts of formaldehyde, 50-150 parts of alkali, 8-16 parts of isoleucine, 8-16 parts of propyl methacrylate, 4-8 parts of a sodium hexametaphosphate mixture, 30-40 parts of polytetrafluoroethylene, 15-25 parts of a cross-linking agent and 10-15 parts of a curing agent, wherein the alkali is one or more of sodium hydroxide, ammonia water and potassium hydroxide, the cross-linking agent is a mixture of acrylic acid and divinylbenzene, and the curing agent is a mixture of imidazole and isocyanate.
2. The plywood surface glue for improving the water resistance of the plywood as claimed in claim 1, wherein the cross-linking agent comprises the following raw materials, by weight, 5-10 parts of acrylic acid and 10-15 parts of divinylbenzene.
3. The plywood surface glue capable of improving the water resistance of the plywood as claimed in claim 1, wherein the curing agent comprises the following raw materials, by weight, 5-7 parts of imidazole and 5-8 parts of isocyanate.
4. The plywood surface glue for improving the water resistance of the plywood as claimed in claim 1, wherein the plywood surface glue comprises, by weight, 10-14 parts of isoleucine, 10-14 parts of propyl methacrylate and 5-7 parts of sodium hexametaphosphate.
5. The preparation method of the plywood surface glue with the improved water resistance according to any one of claims 1 to 4, which is characterized by comprising the following steps of:
s1: weighing 1800 parts of phenol 800-;
s2: weighing 15-25 parts of a cross-linking agent by weight, wherein 5-10 parts of acrylic acid and 10-15 parts of divinylbenzene, adding the cross-linking agent into a reaction kettle, raising the temperature and continuously stirring;
s3: weighing 30-40 parts of polytetrafluoroethylene, 8-16 parts of isoleucine, 8-16 parts of propyl methacrylate and 4-8 parts of sodium hexametaphosphate in parts by weight, and adding into a reaction kettle;
s4: weighing 10-15 parts of curing agent by weight, wherein 5-7 parts of imidazole and 5-8 parts of isocyanate, after the stirring in the step S3 is completed, reducing the delivery of high-temperature steam into the reaction kettle, adding the curing agent into the reaction kettle after the temperature is stably reduced, stirring for 0.3-0.5h, and cooling the temperature in the reaction kettle to room temperature to obtain the high-water-resistance surface adhesive.
6. The preparation method of the plywood face adhesive for improving the water resistance according to claim 5, wherein the temperature in the reaction kettle in the S1 is controlled to be 40-55 ℃, and the reaction time is 0.5-0.8 h.
7. The method for preparing plywood face adhesive with improved water resistance as claimed in claim 5, wherein the amount of clear water added in S1 is 700-800 parts by weight.
8. The method as claimed in claim 5, wherein the temperature of the S2 is raised to 110-140 ℃.
9. The method for preparing the plywood face glue with improved water resistance according to claim 5, wherein the curing agent in the S4 is prepared by mixing imidazole and isocyanic acid in a small reaction kettle, raising the temperature to 60-75 ℃, and slowly stirring for reaction for 0.3-0.5 h.
10. The method as claimed in claim 1, wherein the temperature in S4 is decreased to 30-40 ℃, and the stirring speed in S1-S4 is set to 120-150 rpm.
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| JPH03203979A (en) * | 1989-12-28 | 1991-09-05 | Nippon Kasei Kk | plywood adhesive |
| CN102627944A (en) * | 2012-04-12 | 2012-08-08 | 陕西科技大学 | Modified bone glue adhesive and preparation method thereof |
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|---|---|---|---|---|
| JPH03203979A (en) * | 1989-12-28 | 1991-09-05 | Nippon Kasei Kk | plywood adhesive |
| CN102627944A (en) * | 2012-04-12 | 2012-08-08 | 陕西科技大学 | Modified bone glue adhesive and preparation method thereof |
| CN103756608A (en) * | 2013-12-18 | 2014-04-30 | 上海东和胶粘剂有限公司 | High-frequency hot pressing adhesive |
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