CN105440911A - Low temperature crosslinked high molecular composite material used for MDF sheet material, and preparation method thereof - Google Patents

Low temperature crosslinked high molecular composite material used for MDF sheet material, and preparation method thereof Download PDF

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Publication number
CN105440911A
CN105440911A CN201510964825.XA CN201510964825A CN105440911A CN 105440911 A CN105440911 A CN 105440911A CN 201510964825 A CN201510964825 A CN 201510964825A CN 105440911 A CN105440911 A CN 105440911A
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polymer composite
coated
mdf plate
mdf
agent
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CN201510964825.XA
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CN105440911B (en
Inventor
程军
陈益峰
潘锎
周建新
吴润泽
王桂银
梁晓江
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JIANGSU LANLING POLYMER MATERIAL CO Ltd
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JIANGSU LANLING POLYMER MATERIAL CO Ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/63Additives non-macromolecular organic
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend

Abstract

The invention belongs to the field of chemical coating, and more specifically relates to a high molecular composite material used for coating the external surfaces of MDF sheet material, and protecting and decorating MDF sheet material, and a preparation method thereof. The high molecular composite material comprises, by mass, 30 to 33% of polyester resin, 30 to 33% of epoxy resin, 30 to 37% of a pigment and a filling material, 1.6 to 3.5% of an accessory ingredient, and 0.8 to 1.2% of a curing accelerator. The preparation method comprises following steps: the ingredients are mixed, and are subjected to melt extrusion mixing using an extruding machine; and an obtained product is cooled, smashed, and sieved so as to obtain a finished product. The high molecular composite material is excellent in storage stability; product retrogradation time is almost not changed after 2 months of storage at 38 DEG C; curing condition is 130 DEG C/15min; curing temperature is low; and production efficiency is high.

Description

Polymer composite of a kind of crosslinked at low temperature for MDF sheet material and preparation method thereof
Technical field
The polymer composite that the present invention relates to chemistry painting industry field, be specifically related to a kind of MDF of being coated on sheet material outside surface, MDF sheet material is protected and decorate and preparation method.
Background technology
The treatment process of current MDF plate surface integrates and is divided into: surperficial mechanical workout, faced deorative, covering with paint three step.Wherein cover with paint, lacquer, colour wash, etc. general employing to paint or ultraviolet-curing paint, in the operation of spray paint be: batch putty → polish → spray paint (surperficial defectiveness repeats a whole set of operation again), process period at least 4 days, efficiency is low, produce VOC discharge, contaminate environment, affects workers ' health.And ultraviolet-curing paint is only suitable for plane construction, the position cannot irradiated for different shape and edge light cannot be solidified, and therefore applies restricted.Part low-temperature powder coating is now commercially also had to apply on MDF sheet material, but based on the reason of curing catalyst, in the bake process of this series products, easy xanthochromia, be not suitable for producing light-coloured prods, and package stability is poor, stores 2 months under 30 DEG C of conditions, the gel time of product will obviously shorten, and have impact on the normal use of product.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of polymer composite for being coated in MDF plate surface, the film-forming temperature of this polymer composite is low, and namely 130 DEG C/15min solidifies, VOC free discharge in construction process, belong to environmentally friendly product, product product streamline is constructed, and after baking-curing, product is cooled to normal temperature just can carry out lower one assembling procedure, labor productivity is fast, can be made into shades of colour and texture.
In polymer composite of the present invention, each component and mass percentage are: vibrin 30 ~ 33%, epoxy resin 30 ~ 33%, pigment and filler 30 ~ 37%, auxiliary agent 1.6 ~ 3.5%, curing catalyst 0.8 ~ 1.2%,
Wherein, vibrin is the terminal carboxyl polyester resin that polyvalent alcohol and polycarboxylic acid are polymerized, and its acid number is 65 ~ 75mgKOH/g, Tg is 52 ~ 56 DEG C,
Epoxy resin is solidifying agent, and this epoxy resin is the bisphenol A type epoxy resin that epoxy chloropropane and dihydroxyphenyl propane are polymerized by two-step approach, and its epoxy equivalent (weight) is 780 ~ 850g/eq, softening temperature is 92 ~ 102 DEG C, organochlorine ion content≤0.5%, inorganic chlorine ion content≤300ppm
Filler median size≤10 μm, be specially barium sulfate, kaolin or calcium carbonate wherein one or more, pigment is titanium dioxide, zinc sulfide white, carbon black, red, phthalocyanine blue, Victoria Green WPB or even yellowish,
Auxiliary agent comprises flow agent, dispersion agent, air release agent, fluffy powder, sand streak agent, wherein, flow agent comprises acrylate copolymer, dispersion agent comprises methacrylic acid and cinnamic multipolymer, air release agent comprises st-yrax or amide waxe, fluffy powder comprises aerosil or aluminum oxide C, and sand streak agent comprises tetrafluoroethylene wax powder
Curing catalyst is 2MA-OK or carbaniloyl,phenylcarbamoyl imidazoles (structural formula is as follows); utilize this two kinds of curing catalyst product own structural characteristics; improve polymer composite shelf-stable performance before curing; make it substantially reactionless below 80 DEG C; but the solidification value but significantly reduced during matrix material film forming
(X is H).
Present invention also offers a kind of preparation method of the above-mentioned polymer composite for being coated in MDF plate surface: by mass percentage, each component is dropped into mixing kettle mix, the material mixed is undertaken melt extruding mixing by forcing machine, extrusioning mixture material is cooled, with crusher, material is carried out fragmentation, carry out the broken and classification of fine powder with air classifying mill again, finally sieve with rotating screen classification and obtain product.
Beneficial effect of the present invention is: the present invention prepares polymer composite coating, and substantially without chemical reaction below 80 DEG C, package stability is excellent, and store after 2 months under 38 DEG C of conditions, the gel time of product is substantially unchanged; Product adopts high pressure electrostatic painting on the MDF sheet material through mechanical workout or faced deorative, solidified by the type of heating of infrared rays and hot air circulation, condition of cure is 130 DEG C/15min, solidification value is low, production efficiency is high, not easily produce xanthochromia in the curing process, VOC free discharge (simultaneously can be removed the formaldehyde content in MDF sheet material by 130 DEG C of bakings), the sheet material after solidification directly can carry out next procedure installation, saves time.
The present invention adopts terminal carboxyl polyester resin and bisphenol A type epoxy resin; under the effect of curing catalyst 2MA-OK or carbaniloyl,phenylcarbamoyl imidazoles; the carboxyl of epoxide group and vibrin reacts, crosslinked film forming, and the polymer composite impact strength after crosslinked can reach 50kg/cm; snappiness 1mm; sticking power 0 grade, the physical and mechanical properties of organic double compound and ageing-resistant performance excellence, preparation technology is simple; can labor productivity be significantly improved, be applicable to suitability for industrialized production.
Accompanying drawing explanation
Fig. 1 is preparation method's process flow sheet of polymer composite in the present invention.
Embodiment
In following embodiment, vibrin is the terminal carboxyl polyester resin that polyvalent alcohol and polycarboxylic acid are polymerized, and its acid number of vibrin is 65 ~ 75mgKOH/g, Tg is 52 ~ 56 DEG C; Solidifying agent used is epoxy resin, and epoxy equivalent (weight) is 780 ~ 850g/eq, and softening temperature is 92 ~ 102 DEG C, organochlorine ion content≤0.5%, inorganic chlorine ion content≤300ppm; Pigment is that thermotolerance reaches more than 180 DEG C, various not containing tinting pigment or the Rutile type Titanium Dioxide of heavy metal.
Embodiment 1
For being coated in a polymer composite for MDF plate surface, there is following formula (each component is mass fraction): 33 parts, vibrin (HH-2562), E-12 epoxy resin (GES904) 33 parts, NR950 titanium white 23 parts, 7.6 parts, barium sulfate, 2MA-OK1.2 part, flow agent 1.2 parts, dispersion agent 0.7 part, st-yrax air release agent 0.3 part.
Embodiment 2
For being coated in a polymer composite for MDF plate surface, there is following formula (each component is mass fraction): 30 parts, vibrin (HH-2562), E-12 epoxy resin (GES904) 30 parts, NR950 titanium white 23 parts, 14 parts, barium sulfate, carbaniloyl,phenylcarbamoyl imidazoles 1.2 parts, sand streak agent 0.2 part, polyethylene wax powder 1.3, st-yrax air release agent 0.3 part.
Comparative example 1
Curing catalyst in embodiment 1 is replaced with glyoxal ethyline or 2-ethyl imidazol(e), constant (comparative example 1 is roughly the same with former embodiment 1 content for other component and content, only wherein curing catalyst kind will do change, so that the impact of curing catalyst on products production and package stability to be described).
Comparative example 2
Curing catalyst in embodiment 2 is replaced with 2-benzylimidazoline, constant (comparative example 2 is roughly the same with former embodiment 2 content for other component and content, only wherein curing catalyst kind will do change, so that the impact of curing catalyst on products production and package stability to be described).
As follows for the polymer composite preparation method being coated in MDF plate surface in the various embodiments described above, comparative example:
By weight, each component is dropped into mixing kettle and carries out mixing 5min, the material mixed is undertaken melt extruding (118 DEG C ~ 122 DEG C) mixing by forcing machine, extrusioning mixture material is cooled, with crusher, material is crushed to thick below 2.5mm, long and wide below 20mm, carry out the broken and classification of fine powder with air classifying mill again, finally sieve with rotating screen classification and obtain product, sieve number is 180 orders.The curing process of each embodiment, comparative example's products obtained therefrom and each performance data are as following table:
In the upper table of contrast, data are known, although only the kind of curing catalyst is changed in comparative example 1 and comparative example 2, but it is very large on final aspect of performance impact, as production complexity (refers to the complexity extruding operation here: the present invention needs to melt extrude under about 120 DEG C conditions, activity due to matrix material in comparative example 1,2 is too strong, easily react in extrusion, partial coating premature cure is caused to form waste product, impact is normal produces, and causes waste; And there is not this phenomenon in embodiment 1,2.), yellowing resistance, package stability, long time stored after outward appearance etc. have larger impact.Visible, under the application's formulation condition, choose proper settings promotor and performance is greatly improved; In addition, the interpolation of sand streak agent can change the outward appearance of product, makes product have frosted finish effect.

Claims (10)

1. for being coated in a polymer composite for MDF plate surface, it is characterized in that: described matrix material comprises vibrin, epoxy resin, pigment, filler, auxiliary agent and curing catalyst.
2. as claimed in claim 1 for being coated in the polymer composite of MDF plate surface, it is characterized in that: in described matrix material, each component and mass percentage are, vibrin 30 ~ 33%, epoxy resin 30 ~ 33%, pigment and filler 30 ~ 37%, auxiliary agent 1.6 ~ 3.5%, curing catalyst 0.8 ~ 1.2%.
3. as claimed in claim 1 or 2 for being coated in the polymer composite of MDF plate surface, it is characterized in that: described curing catalyst is 2MA-OK or carbaniloyl,phenylcarbamoyl imidazoles.
4. as claimed in claim 1 or 2 for being coated in the polymer composite of MDF plate surface, it is characterized in that: described vibrin is the terminal carboxyl polyester resin that polyvalent alcohol and polycarboxylic acid are polymerized, its acid number is 65 ~ 75mgKOH/g, Tg is 52 ~ 56 DEG C.
5. as claimed in claim 1 or 2 for being coated in the polymer composite of MDF plate surface, it is characterized in that: described epoxy resin is the bisphenol A type epoxy resin that epoxy chloropropane and dihydroxyphenyl propane are polymerized by two-step approach, its epoxy equivalent (weight) is 780 ~ 850g/eq, softening temperature is 92 ~ 102 DEG C, organochlorine ion content≤0.5%, inorganic chlorine ion content≤300ppm.
6. as claimed in claim 1 or 2 for being coated in the polymer composite of MDF plate surface, it is characterized in that: described pigment is titanium dioxide, zinc sulfide white, carbon black, red, phthalocyanine blue, Victoria Green WPB or even yellowish.
7. as claimed in claim 1 or 2 for being coated in the polymer composite of MDF plate surface, it is characterized in that: described filler be barium sulfate, kaolin or calcium carbonate wherein one or more, median size≤10 μm.
8. as claimed in claim 1 or 2 for being coated in the polymer composite of MDF plate surface, it is characterized in that: described auxiliary agent comprises flow agent, dispersion agent, air release agent, fluffy powder, sand streak agent.
9. as claimed in claim 2 for being coated in the preparation method of the polymer composite of MDF plate surface, it is characterized in that: described preparation method is, by mass percentage, melt extrude mixing by after each component mixing by forcing machine, extrusioning mixture material is cooled, broken, sieving obtains product.
10. as claimed in claim 9 for being coated in the preparation method of the polymer composite of MDF plate surface, it is characterized in that: sieve number used of sieving is 160 order ~ 200 orders.
CN201510964825.XA 2015-12-18 2015-12-18 A kind of polymer composite of crosslinked at low temperature and preparation method thereof for MDF plate Active CN105440911B (en)

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CN107400445A (en) * 2017-09-19 2017-11-28 江南载福粉末涂料(张家港)有限公司 Medium density fibre board (MDF) powdery paints and preparation method thereof
CN107652860A (en) * 2017-10-31 2018-02-02 山东瑞丰高分子材料股份有限公司 Medium-density plate cured powder paint and preparation method thereof
CN109942801A (en) * 2019-03-25 2019-06-28 黄山市向荣新材料有限公司 A kind of MDF material high-leveling 50:50 polyester resin and the preparation method and application thereof

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107400445A (en) * 2017-09-19 2017-11-28 江南载福粉末涂料(张家港)有限公司 Medium density fibre board (MDF) powdery paints and preparation method thereof
CN107652860A (en) * 2017-10-31 2018-02-02 山东瑞丰高分子材料股份有限公司 Medium-density plate cured powder paint and preparation method thereof
CN109942801A (en) * 2019-03-25 2019-06-28 黄山市向荣新材料有限公司 A kind of MDF material high-leveling 50:50 polyester resin and the preparation method and application thereof

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