CN101974277B - White waterborne wood base coat for medium density fiberboard and preparation technology thereof - Google Patents
White waterborne wood base coat for medium density fiberboard and preparation technology thereof Download PDFInfo
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- CN101974277B CN101974277B CN 201010529886 CN201010529886A CN101974277B CN 101974277 B CN101974277 B CN 101974277B CN 201010529886 CN201010529886 CN 201010529886 CN 201010529886 A CN201010529886 A CN 201010529886A CN 101974277 B CN101974277 B CN 101974277B
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- 239000011094 fiberboard Substances 0.000 title claims abstract description 18
- 239000002023 wood Substances 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000005516 engineering process Methods 0.000 title claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 61
- 239000002002 slurry Substances 0.000 claims abstract description 61
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 22
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 22
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000080 wetting agent Substances 0.000 claims abstract description 22
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 21
- CUDYYMUUJHLCGZ-UHFFFAOYSA-N 2-(2-methoxypropoxy)propan-1-ol Chemical compound COC(C)COC(C)CO CUDYYMUUJHLCGZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 238000012856 packing Methods 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000013530 defoamer Substances 0.000 claims description 40
- 239000000178 monomer Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 23
- 230000008719 thickening Effects 0.000 claims description 23
- 238000004132 cross linking Methods 0.000 claims description 21
- 241000276489 Merlangius merlangus Species 0.000 claims description 20
- 239000006185 dispersion Substances 0.000 claims description 20
- 239000003995 emulsifying agent Substances 0.000 claims description 20
- -1 lauryl alcohol ester Chemical class 0.000 claims description 20
- 239000004408 titanium dioxide Substances 0.000 claims description 20
- 239000000839 emulsion Substances 0.000 claims description 16
- 239000003999 initiator Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 239000012752 auxiliary agent Substances 0.000 claims description 10
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 claims description 8
- 239000012153 distilled water Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 7
- 229920000178 Acrylic resin Polymers 0.000 claims description 7
- 238000004945 emulsification Methods 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 4
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- IBVAQQYNSHJXBV-UHFFFAOYSA-N adipic acid dihydrazide Chemical compound NNC(=O)CCCCC(=O)NN IBVAQQYNSHJXBV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004922 lacquer Substances 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- ZRJPOWKEIODAIT-UHFFFAOYSA-N C(CCC(=O)O)(=O)O.C(CCCCCCCCCCCCCCCCC)N Chemical compound C(CCC(=O)O)(=O)O.C(CCCCCCCCCCCCCCCCC)N ZRJPOWKEIODAIT-UHFFFAOYSA-N 0.000 claims description 2
- OVOPQOFZQZDHPJ-UHFFFAOYSA-N COC(CC(C(=O)OC(C(C)C)C)S(=O)(=O)O)=O Chemical class COC(CC(C(=O)OC(C(C)C)C)S(=O)(=O)O)=O OVOPQOFZQZDHPJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000004159 Potassium persulphate Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 2
- 235000019394 potassium persulphate Nutrition 0.000 claims description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 2
- 239000003973 paint Substances 0.000 abstract description 16
- 235000010215 titanium dioxide Nutrition 0.000 abstract description 16
- 238000005336 cracking Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract description 2
- 239000002562 thickening agent Substances 0.000 abstract description 2
- VZWGRQBCURJOMT-UHFFFAOYSA-N Dodecyl acetate Chemical compound CCCCCCCCCCCCOC(C)=O VZWGRQBCURJOMT-UHFFFAOYSA-N 0.000 abstract 2
- 239000002518 antifoaming agent Substances 0.000 abstract 2
- 238000002156 mixing Methods 0.000 abstract 2
- 239000005698 Dodecyl acetate Substances 0.000 abstract 1
- YYRMJZQKEFZXMX-UHFFFAOYSA-N calcium;phosphoric acid Chemical compound [Ca+2].OP(O)(O)=O.OP(O)(O)=O YYRMJZQKEFZXMX-UHFFFAOYSA-N 0.000 abstract 1
- 239000002270 dispersing agent Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 239000002426 superphosphate Substances 0.000 abstract 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000002075 anti-alcohol Effects 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 235000010216 calcium carbonate Nutrition 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229940089401 xylon Drugs 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Paper (AREA)
Abstract
The invention discloses white waterborne wood base coat for a medium density fiberboard and a preparation technology thereof. The preparation technology comprises the processes of: mixing 6.0-8.0 parts of water, 0.2-0.5 part of dispersing agents, 0.2-0.4 part of slurry wetting agents, 0.2-0.4 part of slurry defoaming agents, 18-22 parts of titanium white powder, 5.0-8.0 parts of kaolin, 5.0-8.0 parts of triple superphosphate, 8.0-12.0 parts of talc powder in parts by weight and dispersing to form the slurry, wherein the fineness of the slurry is less than or equal to 50 mu m; mixing 38.0-45.0 parts of resins with the slurry; under the condition of stirring, respectively adding 2.0-4.0 parts of dodecyl acetate, 2.0-4.0 parts of dipropylene glycol methyl ether, 0.3-0.6 part of antifoaming agents, 0.3-0.6 part of wetting agents, 0.3-0.6 part of flatting agents and 0.4-0.8 part of thickening agents, and evenly stirring, discharging and packing. The base coat can control water vapour entering the medium density fiberboard. The paint film has 200-300% of drawing tension, also can not crack, and has good sealing and anti-cracking effects. Besides, the invention has the advantages of quick drying speed and good rubbing property.
Description
[technical field]
The present invention relates to the woodwork coating field, relate in particular to white waterborne wood base coat for medium density fiberboard and preparation technology thereof.
[technical background]
There is very large defective in existing aqueous wooden ware based white primer at the cross section edge sealing of density board.Mainly be to cause paint film cracking at wet weather.Reason mainly is that density board is glued board, and under wet weather, steam can enter in the density board, and the glue in the density board and xylon bubble are sent out, and it is expanded, thereby cause the paint film cracking on surface.
[summary of the invention]
Purpose of the present invention is exactly in order to solve problems of the prior art, proposes a kind of white waterborne wood base coat for medium density fiberboard and preparation technology thereof, also the paint film cracking phenomenon can not occur in wet environment.
For achieving the above object, patent of the present invention has proposed a kind of white waterborne wood base coat for medium density fiberboard, formed by slurry, resin and auxiliary agent, described slurry comprises water, dispersion agent, slurry wets agent, slurry defoamer, titanium dioxide, kaolin, coarse whiting and talcum powder, described auxiliary agent comprises lauryl alcohol ester, dipropylene glycol methyl ether, defoamer, wetting agent, flow agent and thickening material, and the mass percent of described each component in based white primer is:
Water: 6.0%～8.0%
Dispersion agent: 0.2%～0.5%
Slurry wets agent: 0.2%～0.4%
Slurry defoamer: 0.2%～0.4%
Titanium dioxide: 18%～22%
Kaolin: 5.0%～8.0%
Coarse whiting: 5.0%～8.0%
Talcum powder: 8.0%～12.0%
Resin: 38.0%～45.0%
Lauryl alcohol ester: 2.0%～4.0%
Dipropylene glycol methyl ether: 2.0%～4.0%
Defoamer: 0.3%～0.6%
Wetting agent: 0.3%～0.6%
Flow agent: 0.3%～0.6%
Thickening material: 0.4%～0.8%.
As preferably, the mass percent of each component in based white primer is:
Water: 7.3%
Dispersion agent: 0.5%
Slurry wets agent: 0.4%
Slurry defoamer: 0.4%
Titanium dioxide: 20.7%
Kaolin: 7.7%
Coarse whiting: 7.7%
Talcum powder: 11%
Resin: 38.0%
Lauryl alcohol ester: 2.3%
Dipropylene glycol methyl ether: 2.3%
Defoamer: 0.4%
Wetting agent: 0.4%
Flow agent: 0.4%
Thickening material: 0.5%.
As preferably, the mass percent of each component in based white primer is:
Water: 7.0%
Dispersion agent: 0.3%
Slurry wets agent: 0.3%
Slurry defoamer: 0.3%
Titanium dioxide: 21.6%
Kaolin: 6.2%
Coarse whiting: 6.2%
Talcum powder: 9.4%
Resin: 41.0%
Lauryl alcohol ester: 3.2%
Dipropylene glycol methyl ether: 3.2%
Defoamer: 0.3%
Wetting agent: 0.3%
Flow agent: 0.3%
Thickening material: 0.4%.
As preferably, the mass percent of each component in based white primer is:
Water: 6.3%
Dispersion agent: 0.2%
Slurry wets agent: 0.2%
Slurry defoamer: 0.2%
Titanium dioxide: 18%
Kaolin: 5.2%
Coarse whiting: 6.7%
Talcum powder: 9.5%
Resin: 45.0%
Lauryl alcohol ester: 3.3%
Dipropylene glycol methyl ether: 3.3%
Defoamer: 0.5%
Wetting agent: 0.5%
Flow agent: 0.5%
Thickening material: 0.6%.
For achieving the above object, patent of the present invention has also proposed a kind of preparation technology of white waterborne wood base coat for medium density fiberboard, to first by mass 6.0～8.0 parts water, 0.2～0.5 part dispersion agent, 0.2～0.4 part slurry wets agent, 0.2～0.4 part slurry defoamer, 18～22 parts titanium dioxide, 5.0～8.0 parts kaolin, 5.0～8.0 parts coarse whiting, 8.0 be dispersed into the slurry of fineness≤50 μ m after～12.0 parts talcum powder mixes, again 38.0～45.0 parts resin is mixed with above-mentioned slurry, in the situation that stir, the lauryl alcohol ester that adds respectively 2.0～4.0 parts, 2.0～4.0 parts dipropylene glycol methyl ether, 0.3～0.6 part defoamer, 0.3～0.6 part wetting agent, 0.3～0.6 part flow agent, 0.4～0.8 part thickening material can the discharging packing after stirring.
As preferably, the addition of described thickening material is to make the viscosity of lacquer at η
25 ℃=800 centipoises
The beneficial effect of patent of the present invention: after based white primer of the present invention is sprayed at the density board cross section, even under the environment of high humidity, paint film still can effectively be controlled steam and enter in the density board, even there is a small amount of steam to enter density board density board is expanded, paint film has 200～300% tensile stress, and paint film can not ftracture yet, the anti-cracking of good sealing effect is arranged, and rate of drying of the present invention is fast, and grinability is good, can the Effective Raise density board etc. the utilization ratio of woodwork.Thoroughly substitute the oil-base paint edge sealing, protection construction workman's is healthy, reduces environmental pollution, better shows the appearance of film effect.
[embodiment]
Embodiment one:
White waterborne wood base coat for medium density fiberboard, formed by slurry, resin and auxiliary agent, described slurry comprises water, dispersion agent, slurry wets agent, slurry defoamer, titanium dioxide, kaolin, coarse whiting and talcum powder, described auxiliary agent comprises lauryl alcohol ester, dipropylene glycol methyl ether, defoamer, wetting agent, flow agent and thickening material, and the mass percent of described each component in based white primer is: water: 7.3%; Dispersion agent: 0.5%; Slurry wets agent: 0.4%; Slurry defoamer: 0.4%; Titanium dioxide: 20.7%; Kaolin: 7.7%; Coarse whiting: 7.7%; Talcum powder: 11%; Resin: 38.0%; Lauryl alcohol ester: 2.3%; Dipropylene glycol methyl ether: 2.3%; Defoamer: 0.4%; Wetting agent: 0.4%; Flow agent: 0.4%; Thickening material: 0.5%.
Described dispersion agent adopts Shenzhen Hydropatat5040 of Hai Chuan Industry Co.,Ltd main component: poly carboxylic acid sodium; air products company's T G is adopted in the slurry wets agent; the slurry defoamer adopts Degussa Tego Airex902w main component: the polysiloxane polyether copolymer emulsion; titanium dioxide adopts du pont company 902+ main component: TiO2; kaolin adopts the rich kaolin of Shanxi jade pendant 1250 order main component: the SiO2+Al2O3 of company limited; coarse whiting adopts peak, Jiangxi 1250 order main component: the CaCO3 of calcium carbonate company limited; talcum powder adopts sea, Yingkou, Liaoning 800 order main component: the AlSiO2 of talcum mining industry company limited, and defoamer adopts Shenzhen Foamstar A of Hai Chuan Industry Co.,Ltd
10Main component: special mineral oil, wetting agent adopts Shenzhen Hydropatat of Hai Chuan Industry Co.,Ltd 140 main components: organic modified polyorganosiloxane, flow agent adopts the sea name Levaslip W-455 of this special chemical company main component: modified polyorganosiloxane, thickening material adopts Hefei Anke Fine Chemicals Co., Ltd., polyurethane associative thickener HUER-A.
The preparation technology of white waterborne wood base coat for medium density fiberboard, step is as follows:
Making beating: under high shear disperse after first water, dispersion agent, slurry wets agent, slurry defoamer, titanium dioxide, kaolin, coarse whiting, talcum powder being mixed, obtain the slurry of fineness≤50 μ m.
Paint: nucleocapsid acrylic resin and above-mentioned slurry that snappiness is suitable are mixed together, in the situation that stir, add respectively lauryl alcohol ester, dipropylene glycol methyl ether, defoamer, wetting agent, flow agent, thickening material, can discharging pack after stirring, the addition of thickening material is to make the viscosity of lacquer at η
25 ℃=800 centipoises.
Resin among the present invention is the nucleocapsid acrylic resin, and is synthetic for making by oneself, and this nucleocapsid acrylic resin is by nuclear part, shell part, bottoming liquid, initiator and self-crosslinking sealing monomer composition.Described nuclear part comprises 20～30 parts butyl methacrylate, 60～66 parts methyl methacrylate, 8～12 parts butyl acrylate in mass; 2～3.5 parts methacrylic acid, but 0.2～0.35 part reactive emulsifier A, but the distilled water of 0.3～0.8 part reactive emulsifier B and 50 parts; Described shell part comprises 25～30 parts butyl methacrylate, 22～25 parts methyl methacrylate, 38～41 parts butyl acrylate in mass; 2～3.5 parts methacrylic acid, 2～4 parts self-cross linking monomer, but 0.2～0.35 part reactive emulsifier A, but the distilled water of 0.3～0.8 part reactive emulsifier B and 50 parts; But bottoming liquid comprises 0.4～0.7 part reactive emulsifier A in mass, but the distilled water of 0.6～1.6 part reactive emulsifier B and 85 parts; Initiator comprises 0.6 part Potassium Persulphate and 10 parts distilled water in mass; Self-crosslinking sealing monomer is 1～2 part in mass.Proportioning between above-mentioned nuclear part, shell part, bottoming liquid, initiator and the self-crosslinking sealing monomer also is in above-mentioned mass fraction, as examine the part be 151.575 parts, then shell partly is 81.325 parts, bottoming liquid is 86.65 parts, initiator is 10.6 parts, and self-crosslinking sealing monomer is 1.5 parts.
Described self-cross linking monomer adopts diacetone-acryloamide(DAA) (DAAM), and self-crosslinking sealing monomer adopts adipic dihydrazide (ADH).But described reactive emulsifier A adopts DNS-18, is mono succinate stearylamide sulfonate sodium, but reactive emulsifier B adopts DNS-86, is sulfo-succinic acid methyl-isobutyl methyl esters sodium.
The preparation technology of nucleocapsid acrylic resin, step is as follows:
A) pre-emulsification: will examine part pre-emulsification 0.5h and obtain examining pre-emulsion, shell part pre-emulsification 0.5h obtains the shell pre-emulsion;
B) bottoming liquid adds: bottoming liquid is added the reactor reaction, and be warmed up to 78～82 ℃;
C) the nuclear pre-emulsion adds: all nuclear pre-emulsions are evenly splashed in 2.5h in the reactor, drip simultaneously initiator;
D) the first insulation reaction: 80 ℃ of lower insulations 30 minutes;
E) the shell pre-emulsion adds: all shell pre-emulsions are evenly splashed in 2h in the reactor, drip simultaneously initiator;
F) the second insulation reaction: stopped reaction when insulation 3-4h mensuration transformation efficiency reaches 96-98%;
G) cooling: cool to 50 ℃, transfer Ph=8.5-9.0, stir 0.5h;
H) self-crosslinking sealing monomer adds: self-crosslinking is sealed monomer add after reactor stirs, filter and packing gets final product.
The present invention introduces self-cross linking monomer in the system of conventional acrylic emulsion, this monomer can keep relative stability when conventional storage, when film forming, after the condition of system changes, can realize intermolecular being cross-linked with each other, and form a kind of hard-packed reticulated structure.This reticulated structure is arranged closely, has certain rule, can effectively hinder the motion of water molecules or little minute alcohol, thereby reach purpose water-fast, anti-alcohol.Owing to there being reticulated structure, the physicalies such as its antiblocking, tensile strength are improved greatly, so make whole paint film have more excellent performance simultaneously.
Self-crosslinking acrylic emulsion of the present invention belongs to a kind of Structure of Core/shell Emulsion, its nuclear is the monomer composition by some high glass transition temperatures, its average T g 〉=60 ℃ (Tg refers to the average glass transition temperature of all monomers), the purpose of doing like this is to make it have extremely strong hardness, improves the resistance to blocking of filming.Its shell is the monomer composition by average T g=15 ℃, wherein contains self-cross linking monomer, can reduce like this film-forming temperature MFFT (MFFT refers to the minimum film-forming temperature of paint film) of whole paint film, makes it be easy to film forming, and is easy to crosslinked.
The present invention has improved the performance of vinylformic acid paint film, has abandoned traditional emulsifying agent, and adopts the reactable emulsifying agent, and this emulsifying agent can participate in reaction with monomer, has formed the part of paint film.When forming paint film, can as conventional emulsifier, not move the surface of paint film, thereby affect the performances such as its water-fast, anti-alcohol, antiblocking.
This prescription has the good characteristics of opacifying power.
Embodiment two:
White waterborne wood base coat for medium density fiberboard, formed by slurry, resin and auxiliary agent, described slurry comprises water, dispersion agent, slurry wets agent, slurry defoamer, titanium dioxide, kaolin, coarse whiting and talcum powder, described auxiliary agent comprises lauryl alcohol ester, dipropylene glycol methyl ether, defoamer, wetting agent, flow agent and thickening material, and the mass percent of described each component in based white primer is: water: 7.0%; Dispersion agent: 0.3%; Slurry wets agent: 0.3%; Slurry defoamer: 0.3%; Titanium dioxide: 21.6%; Kaolin: 6.2%; Coarse whiting: 6.2%; Talcum powder: 9.4%; Resin: 41.0%; Lauryl alcohol ester: 3.2%; Dipropylene glycol methyl ether: 3.2%; Defoamer: 0.3%; Wetting agent: 0.3%; Flow agent: 0.3%; Thickening material: 0.4%.Preparation process is identical with embodiment one.
This prescription has all good characteristics of opacifying power and anti-cracking behavior.
Embodiment three:
White waterborne wood base coat for medium density fiberboard, formed by slurry, resin and auxiliary agent, described slurry comprises water, dispersion agent, slurry wets agent, slurry defoamer, titanium dioxide, kaolin, coarse whiting and talcum powder, described auxiliary agent comprises lauryl alcohol ester, dipropylene glycol methyl ether, defoamer, wetting agent, flow agent and thickening material, and the mass percent of described each component in based white primer is: water: 6.3%; Dispersion agent: 0.2%; Slurry wets agent: 0.2%; Slurry defoamer: 0.2%; Titanium dioxide: 18%; Kaolin: 5.2%; Coarse whiting: 6.7%; Talcum powder: 9.5%; Resin: 45.0%; Lauryl alcohol ester: 3.3%; Dipropylene glycol methyl ether: 3.3%; Defoamer: 0.5%; Wetting agent: 0.5%; Flow agent: 0.5%; Thickening material: 0.6%.Preparation process is identical with embodiment one.
This prescription has the characteristics of anti-cracking best results.
Above-described embodiment is to explanation of the present invention, is not limitation of the invention, any scheme after the simple transformation of the present invention is all belonged to protection scope of the present invention.
Claims (6)
1. white waterborne wood base coat for medium density fiberboard, it is characterized in that: formed by slurry, resin and auxiliary agent, described slurry comprises water, dispersion agent, slurry wets agent, slurry defoamer, titanium dioxide, kaolin, coarse whiting and talcum powder, described auxiliary agent comprises lauryl alcohol ester, dipropylene glycol methyl ether, defoamer, wetting agent, flow agent and thickening material, and the mass percent of described each component in based white primer is:
Water: 6.0%～8.0%
Dispersion agent: 0.2%～0.5%
Slurry wets agent: 0.2%～0.4%
Slurry defoamer: 0.2%～0.4%
Titanium dioxide: 18%～22%
Kaolin: 5.0%～8.0%
Coarse whiting: 5.0%～8.0%
Talcum powder: 8.0%～12.0%
Resin: 38.0%～45.0%
Lauryl alcohol ester: 2.0%～4.0%
Dipropylene glycol methyl ether: 2.0%～4.0%
Defoamer: 0.3%～0.6%
Wetting agent: 0.3%～0.6%
Flow agent: 0.3%～0.6%
Thickening material: 0.4%～0.8%;
Described resin is the nucleocapsid acrylic resin, and this nucleocapsid acrylic resin is by nuclear part, shell part, bottoming liquid, initiator and self-crosslinking sealing monomer composition; Described nuclear part comprises 20～30 parts butyl methacrylate, 60～66 parts methyl methacrylate, 8～12 parts butyl acrylate in mass; 2～3.5 parts methacrylic acid, but 0.2～0.35 part reactive emulsifier A, but the distilled water of 0.3～0.8 part reactive emulsifier B and 50 parts; Described shell part comprises 25～30 parts butyl methacrylate, 22～25 parts methyl methacrylate, 38～41 parts butyl acrylate in mass; 2～3.5 parts methacrylic acid, 2～4 parts self-cross linking monomer, but 0.2～0.35 part reactive emulsifier A, but the distilled water of 0.3～0.8 part reactive emulsifier B and 50 parts; But bottoming liquid comprises 0.4～0.7 part reactive emulsifier A in mass, but the distilled water of 0.6～1.6 part reactive emulsifier B and 85 parts; Initiator comprises 0.6 part Potassium Persulphate and 10 parts distilled water in mass; Self-crosslinking sealing monomer is 1～2 part in mass; Proportioning between above-mentioned nuclear part, shell part, bottoming liquid, initiator and the self-crosslinking sealing monomer is in above-mentioned mass fraction, the nuclear part is 151.575 parts, and shell partly is 81.325 parts, and bottoming liquid is 86.65 parts, initiator is 10.6 parts, and self-crosslinking sealing monomer is 1.5 parts;
Described self-cross linking monomer adopts diacetone-acryloamide(DAA), and self-crosslinking sealing monomer adopts adipic dihydrazide, but described reactive emulsifier A adopts mono succinate stearylamide sulfonate sodium, but reactive emulsifier B adopts sulfo-succinic acid methyl-isobutyl methyl esters sodium;
The preparation technology of nucleocapsid acrylic resin, step is as follows:
A) pre-emulsification: will examine part pre-emulsification 0.5h and obtain examining pre-emulsion, shell part pre-emulsification 0.5h obtains the shell pre-emulsion;
B) bottoming liquid adds: bottoming liquid is added the reactor reaction, and be warmed up to 78～82 ℃;
C) the nuclear pre-emulsion adds: all nuclear pre-emulsions are evenly splashed in 2.5h in the reactor, drip simultaneously initiator;
D) the first insulation reaction: 80 ℃ of lower insulations 30 minutes;
E) the shell pre-emulsion adds: all shell pre-emulsions are evenly splashed in 2h in the reactor, drip simultaneously initiator;
F) the second insulation reaction: stopped reaction when insulation 3-4h mensuration transformation efficiency reaches 96-98%;
G) cooling: cool to 50 ℃, transfer Ph=8.5-9.0, stir 0.5h;
H) self-crosslinking sealing monomer adds: self-crosslinking is sealed monomer add after reactor stirs, filter and packing gets final product.
2. white waterborne wood base coat for medium density fiberboard as claimed in claim 1, it is characterized in that: the mass percent of each component in based white primer is:
Water: 7.3%
Dispersion agent: 0.5%
Slurry wets agent: 0.4%
Slurry defoamer: 0.4%
Titanium dioxide: 20.7%
Kaolin: 7.7%
Coarse whiting: 7.7%
Talcum powder: 11%
Resin: 38.0%
Lauryl alcohol ester: 2.3%
Dipropylene glycol methyl ether: 2.3%
Defoamer: 0.4%
Wetting agent: 0.4%
Flow agent: 0.4%
Thickening material: 0.5%.
3. white waterborne wood base coat for medium density fiberboard as claimed in claim 1, it is characterized in that: the mass percent of each component in based white primer is:
Water: 7.0%
Dispersion agent: 0.3%
Slurry wets agent: 0.3%
Slurry defoamer: 0.3%
Titanium dioxide: 21.6%
Kaolin: 6.2%
Coarse whiting: 6.2%
Talcum powder: 9.4%
Resin: 41.0%
Lauryl alcohol ester: 3.2%
Dipropylene glycol methyl ether: 3.2%
Defoamer: 0.3%
Wetting agent: 0.3%
Flow agent: 0.3%
Thickening material: 0.4%.
4. white waterborne wood base coat for medium density fiberboard as claimed in claim 1, it is characterized in that: the mass percent of each component in based white primer is:
Water: 6.3%
Dispersion agent: 0.2%
Slurry wets agent: 0.2%
Slurry defoamer: 0.2%
Titanium dioxide: 18%
Kaolin: 5.2%
Coarse whiting: 6.7%
Talcum powder: 9.5%
Resin: 45.0%
Lauryl alcohol ester: 3.3%
Dipropylene glycol methyl ether: 3.3%
Defoamer: 0.5%
Wetting agent: 0.5%
Flow agent: 0.5%
Thickening material: 0.6%.
5. the preparation technology of the described white waterborne wood base coat for medium density fiberboard of claim 1, it is characterized in that: incite somebody to action first by mass 6.0～8.0 parts water, 0.2～0.5 part dispersion agent, 0.2～0.4 part slurry wets agent, 0.2～0.4 part slurry defoamer, 18～22 parts titanium dioxide, 5.0～8.0 parts kaolin, 5.0～8.0 parts coarse whiting, 8.0 be dispersed into the slurry of fineness≤50 μ m after～12.0 parts talcum powder mixes, again 38.0～45.0 parts resin is mixed with above-mentioned slurry, in the situation that stir, the lauryl alcohol ester that adds respectively 2.0～4.0 parts, 2.0～4.0 parts dipropylene glycol methyl ether, 0.3～0.6 part defoamer, 0.3～0.6 part wetting agent, 0.3～0.6 part flow agent, 0.4～0.8 part thickening material can the discharging packing after stirring.
6. the preparation technology of white waterborne wood base coat for medium density fiberboard as claimed in claim 5, it is characterized in that: the addition of described thickening material is to make the viscosity of lacquer at η
25 ℃=80 ± 5ku.
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