CN111087886A - Water-based paint for reconstituted bamboo and preparation method thereof - Google Patents
Water-based paint for reconstituted bamboo and preparation method thereof Download PDFInfo
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- CN111087886A CN111087886A CN201911399882.2A CN201911399882A CN111087886A CN 111087886 A CN111087886 A CN 111087886A CN 201911399882 A CN201911399882 A CN 201911399882A CN 111087886 A CN111087886 A CN 111087886A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING 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
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/003—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
- C08F251/02—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention claims a restructuring bamboo coating and a preparation method thereof, wherein a soft monomer, a hard monomer, paraffin, an emulsifier and partial deionized water are adopted to prepare a pre-emulsion, then an initiator is added for stirring, the reaction is carried out until an emulsion with blue gloss is obtained, the residual pre-emulsion, dialdehyde modified nano-cellulose and a hair agent are added dropwise, after the initiator is added dropwise, a bamboo surface treating agent is added for heat preservation and filtration, and discharging is carried out, so as to obtain the emulsion for the restructuring bamboo coating, finally deionized water and an auxiliary agent are added to prepare the restructuring bamboo coating, the adhesive force, the hardness and the wear resistance of the woodenware coating are improved by adding the dialdehyde modified nano-cellulose and the bamboo surface modifying agent, and the coating.
Description
Technical Field
The invention relates to a water-based paint for recombined bamboos and a preparation method thereof, belonging to the technical field of wood processing.
Background
The recombined bamboo is a novel bamboo composite material which is formed by assembling bamboo fiber bundles as basic units according to the grain and gluing. The bamboo product overcomes the defects of small bamboo diameter, anisotropy, uneven material and the like, is widely applied to the fields of floors, furniture, doors and windows, building structural materials, garden landscapes, wind power blades and the like, and has become one of three main products of bamboo products in China (Shang Ji, 2012; Jiang Hui, 2002; Zhong et al, 2017). The recombined bamboo and the products thereof are subjected to surface coating, so that the main quality problems of the recombined bamboo such as product deformation, cracking, wire jumping and the like can be better prevented, and the defect that the recombined bamboo is dark and single in color can be overcome to a certain extent (William et al, 2017; Yuanzun, 2014). With the more and more extensive application of the recombined bamboo products in indoor space, the requirement on environmental protection performance is higher and higher, and the water-based paint with better environmental protection performance is gradually used for surface protection of the recombined bamboo products.
However, the processing technology of the recombined bamboo determines that the cell compression is larger, which is reflected by higher surface compactness of the material. Compared with wood and common bamboo, the coating is more difficult to permeate on the surface of the recombined bamboo, which directly causes poor coating quality, and is reflected by poor adhesion, easy cracking and foaming of the coating. Meanwhile, the bamboo is easy to mildew, and the recombined bamboo coated with the water-based paint is more obvious in mildew, which seriously influences the quality and application of the recombined bamboo product. The general water-based paint can not well meet the related requirements of recombined bamboo product coating. Therefore, the water-based paint with stronger permeability and better anti-mildew performance in the recombined bamboo base material is developed, and the problems can be better solved.
Disclosure of Invention
The invention provides a water-based wood coating for recombined bamboo, which can solve the problems of poor coating performance of the recombined bamboo coating and easy mildew of related products, so that the prepared water-based wood coating for recombined bamboo has better coating quality, coating adhesive force and mildew resistance, and the environmental protection property reaches the relevant national standard.
The wood lacquer emulsion is prepared from the following components: the components are calculated by weight portion
The soft monomer is selected from one or more of butyl acrylate, ethyl acrylate and isooctyl acrylate;
the hard monomer is one or more of styrene, methyl methacrylate, vinyl acetate, acrylonitrile, acrylamide, methyl acrylate, acrylic acid and acrylamide;
the bamboo wood surface modifier is selected from one or more of vinyl triacetoxysilane VAS, gamma-aminopropyltriethoxysilane KH550 and gamma- (2, 3-epoxypropoxy) propyl trimethoxysilane KH 560.
The initiator is selected from ammonium persulfate or potassium persulfate;
the emulsifier is selected from one or more of sodium dodecyl sulfate, polyoxyethylene fatty acid ester, ammonium alkylphenol polyethoxylate, SPAN series and Tween series;
the dialdehyde modified nano-cellulose is prepared by adopting self-made dialdehyde modified nano-cellulose, adjusting the pH value of 2-4 wt% of the nano-cellulose solution to 4 by using 0.1mol/L hydrochloric acid solution, adding 6mmol/L sodium periodate at the rotation speed of 1000r/min and the temperature of 40-60 ℃, reacting for 6-7h, and cooling to obtain the dialdehyde modified nano-cellulose.
The preparation method of the recombined bamboo coating comprises the following steps:
1. pre-emulsification: weighing soft monomer, hard monomer, paraffin, emulsifier and 1/3-1/2 deionized water, mixing, homogenizing, stirring for 30-60min to obtain pre-emulsion with stirring speed of more than 1000 r/min;
2. preparing an emulsion: adding a pH regulator and the rest deionized water into a reaction kettle provided with a stirring device, a condensing device, a nitrogen protection device and a feeding device, uniformly stirring, pouring 1/4 pre-emulsion and 1/4 initiator into the reaction kettle, heating to 80 ℃, stirring, reacting to obtain emulsion with blue gloss, beginning to dropwise add the rest pre-emulsion, dialdehyde modified nano-cellulose and initiator, controlling the pre-emulsion to be completely dripped within 1h, controlling the initiator to be completely dripped within 1.5h, keeping the temperature at 80-85 ℃, controlling the stirring speed at 100r, adding a bamboo surface treatment agent after finishing dripping of the initiator, preserving the temperature for 15min, filtering, discharging, adjusting the pH to 7-8, and sealing for later use;
3. preparing a coating: and mixing the prepared emulsion with deionized water, a wetting and leveling agent, a defoaming agent, a thickening agent, a film-forming assistant and a wax emulsion according to a certain proportion to prepare the water-based wood lacquer with the core-shell structure.
The wetting and leveling agent is BYK-346, the defoaming agent is BYK-019, the thickening agent is PE-625, the film-forming additive is TEXNALA-12, and the wax emulsion is BYK-513.
Further, based on 100 parts by weight of the emulsion, 10-30 parts by weight of deionized water, 0.1-0.5 part by weight of a wetting and leveling agent, 0.2-0.5 part by weight of a defoaming agent, 0.5-1.5 parts by weight of a thickening agent, 3-5 parts by weight of a film-forming assistant and 5-10 parts by weight of a wax emulsion are added in the step 3.
The invention has the following effects:
1) according to the invention, dialdehyde modified nano-cellulose is added when the coating resin is prepared, and the modified cellulose has aldehyde group and alcoholic hydroxyl group, and can react with monomers in a system and active groups in a bamboo material base material simultaneously, so that the adhesive force of the coating is improved.
2) Compared with the similar resin, in the preparation process of the coating resin pre-emulsion, the stirring speed is relatively high, the reaction time is short, and the prepared resin has low molecular weight and better permeability.
3) The bamboo surface modifier is added when the coating resin is prepared so as to change the wettability of the bamboo surface and enable the base material to be better combined with the coating film. GB/T23999-2009 waterborne wood coating for interior decoration. GB24410-2009 indoor decoration material waterborne wood coating limits the harmful substances.
Detailed Description
Example 1
1) Pre-emulsification: weighing 80g of butyl acrylate, 40g of methyl methacrylate, 40g of styrene, 2g of paraffin, 20g of sodium dodecyl sulfate and 90g of deionized water, mixing, homogenizing and stirring for 60min to obtain a pre-emulsion, wherein the stirring speed is more than 1000 r/min;
2) preparing an emulsion: adding a pH regulator into a reaction kettle provided with a stirring device, a condensing device, a nitrogen protection device and a feeding device, adding the rest deionized water, uniformly stirring, pouring 1/4 pre-emulsion and 0.2g of ammonium persulfate into the reaction kettle, heating to 80 ℃, stirring, reacting to obtain emulsion with blue gloss, beginning to dropwise add the rest pre-emulsion, 0.2g of dialdehyde modified nano-cellulose and 0.6g of ammonium overflowing salt, controlling the pre-emulsion to be completely dripped within 1 hour, controlling the ammonium persulfate to be completely dripped within 1.5 hours, keeping the temperature at 80-85 ℃, controlling the stirring speed at 100r/min, adding 3g of vinyl triacetoxy silane after finishing the initiator, preserving the temperature for 15min, filtering and discharging, regulating the pH to 7-8, and sealing for later use;
3) preparing a coating: and mixing the prepared emulsion with 60g of deionized water, 0.2g of wetting and leveling agent, 0.4g of defoaming agent, 0.2g of thickening agent, 3g of film-forming assistant and 5g of wax emulsion according to a certain proportion to prepare the water-based paint for the recombined bamboo.
Example 2
1) Pre-emulsification: weighing 120g of isooctyl acrylate, 80g of vinyl acetate, 80g of acrylonitrile, 2g of paraffin, 13g of polyoxyethylene fatty acid ester and 90g of deionized water, mixing, homogenizing and stirring for 60min to obtain a pre-emulsion, wherein the stirring speed is more than 1000 r/min;
2) preparing an emulsion: adding a pH regulator and the rest deionized water into a reaction kettle provided with a stirring device, a condensing device, a nitrogen protection device and a feeding device, uniformly stirring, pouring 1/4 pre-emulsion and 0.5g of potassium persulfate into the reaction kettle, heating to 80 ℃, stirring, reacting to obtain emulsion with blue gloss, beginning to dropwise add the rest pre-emulsion, 1g of dialdehyde modified nano-cellulose and 1.5g of potassium persulfate, controlling the pre-emulsion to be completely dripped within 1 hour, controlling the potassium persulfate to be completely dripped within 1.5 hours, keeping the temperature at 80-85 ℃, controlling the stirring speed at 100r/min, adding 1.5g of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane after finishing dripping of an initiator, keeping the temperature for 15min, filtering, discharging, regulating the pH to 7-8, and sealing for later use;
3) preparing a coating: and mixing the prepared emulsion with 100g of deionized water, 0.4g of wetting and leveling agent, 0.2g of defoaming agent, 0.5g of thickening agent, 5g of film-forming assistant and 10g of wax emulsion according to a certain proportion to prepare the water-based paint for the recombined bamboo.
Comparative example 1
The same preparation method as in example 1, except that the dialdehyde-modified nanocellulose was not added.
Comparative example 2
The same preparation method as that of the example 1 is carried out, except that no bamboo surface treatment agent is added.
Comparative example 3
The preparation process is identical to that of example 1, except that the stirring speed during the preparation of the pre-emulsion is 200 r/min.
Testing the effects
The examples and the comparative examples are respectively tested according to the limit of harmful substances in the GB/T23999-2009 waterborne wood coating for interior decoration and the GB24410-2009 waterborne wood coating for interior decoration and decoration materials.
The test results are shown in Table 1
TABLE 1
According to the table 1, the wood lacquer obtained by the invention has the advantages of good environmental protection effect, high adhesive force and good wear resistance.
Finally, it should be noted that: the above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention; thus, while the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted; all such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention and protected by the following claims.
Claims (9)
1. The emulsion for the recombined bamboo water-based paint is characterized by being prepared from the following components in parts by weight:
2. the emulsion according to claim 1, wherein the soft monomer is selected from one or more of butyl acrylate, ethyl acrylate and isooctyl acrylate; the hard monomer is one or more selected from styrene, methyl methacrylate, vinyl acetate, acrylonitrile, acrylamide, methyl acrylate, acrylic acid and acrylamide.
3. The emulsion according to claim 1, wherein the bamboo wood surface modifier is one or more selected from the group consisting of vinyl triacetoxysilane VAS, gamma-aminopropyltriethoxysilane KH550, gamma- (2, 3-glycidoxy) propyl trimethoxysilane KH 560.
4. An emulsion according to claim 1, wherein said initiator is selected from ammonium persulfate or potassium persulfate.
5. The emulsion of claim 1, wherein the emulsifier is selected from one or more of sodium lauryl sulfate, polyoxyethylene fatty acid ester, ammonium alkylphenol polyethoxy ether sulfate, SPAN series and tween series.
6. The emulsion according to claim 1, characterized in that the dialdehyde modified nanocellulose is prepared by the following method: and (3) adjusting the pH value of the nano-cellulose solution to 4 by using 0.1mol/L hydrochloric acid solution, adding 6mmol/L sodium periodate at the rotation speed of 1000r/min and the temperature of 40-60 ℃, reacting for 6-7h, and cooling to obtain the dialdehyde modified nano-cellulose.
7. The preparation method of the recombined bamboo coating is characterized by comprising the following steps:
1) pre-emulsification: weighing soft monomer, hard monomer, paraffin, emulsifier and 1/3-1/2 deionized water, mixing, homogenizing, stirring for 30-60min to obtain pre-emulsion with stirring speed of more than 1000 r/min;
2) adding a pH regulator and the rest deionized water into a reaction kettle provided with a stirring device, a condensing device, a nitrogen protection device and a feeding device, uniformly stirring, pouring 1/4 pre-emulsion and 1/4 initiator into the reaction kettle, heating to 80 ℃, stirring, reacting to obtain emulsion with blue gloss, beginning to dropwise add the rest pre-emulsion, dialdehyde modified nano-cellulose and initiator, controlling the pre-emulsion to be completely dripped within 1h, controlling the initiator to be completely dripped within 1.5h, keeping the temperature at 80-85 ℃, controlling the stirring speed at 100r, adding a bamboo surface treatment agent after finishing dripping of the initiator, preserving the temperature for 15min, filtering, discharging, adjusting the pH to 7-8, and sealing for later use;
3) preparing a coating: and mixing the prepared emulsion with deionized water, a wetting and leveling agent, a defoaming agent, a thickening agent, a film-forming assistant and a wax emulsion according to a certain proportion to prepare the water-based wood lacquer with the core-shell structure.
8. The reconstituted bamboo paint as claimed in claim 7, wherein the wetting and leveling agent is BYK-346, the defoaming agent is BYK-019, the thickener is PE-625, the film-forming aid is TEXNALA-12, and the wax emulsion is BYK-513.
9. The reconstituted bamboo paint as claimed in claim 7, wherein in step 3, 10-30 parts by weight of deionized water, 0.1-0.5 part by weight of wetting and leveling agent, 0.2-0.5 part by weight of defoaming agent, 0.5-1.5 parts by weight of thickening agent, 3-5 parts by weight of film-forming assistant and 5-10 parts by weight of wax emulsion are added, based on 100 parts by weight of the emulsion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911399882.2A CN111087886A (en) | 2019-12-31 | 2019-12-31 | Water-based paint for reconstituted bamboo and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911399882.2A CN111087886A (en) | 2019-12-31 | 2019-12-31 | Water-based paint for reconstituted bamboo and preparation method thereof |
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| CN111087886A true CN111087886A (en) | 2020-05-01 |
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| CN201911399882.2A Pending CN111087886A (en) | 2019-12-31 | 2019-12-31 | Water-based paint for reconstituted bamboo and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111978810A (en) * | 2020-08-31 | 2020-11-24 | 北京国原新技术有限公司 | Method for producing coating material and coating material |
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| CN105273557A (en) * | 2015-10-13 | 2016-01-27 | 中国林业科学研究院木材工业研究所 | Waterborne wood paint and preparation method thereof |
| CN105969005A (en) * | 2016-03-01 | 2016-09-28 | 阜阳市金木工艺品有限公司 | Alpha-Fe2O3 modified woodenware coating and preparation method thereof |
| CN106476108A (en) * | 2016-11-15 | 2017-03-08 | 湖北工业大学 | The method for formaldehydeless fiberboard being prepared using dialdehyde cellulose |
| CN109135528A (en) * | 2018-08-17 | 2019-01-04 | 佛山市森昂生物科技有限公司 | A kind of waterborne anti-rust sealer |
| CN113861880A (en) * | 2021-10-21 | 2021-12-31 | 西南林业大学 | Preparation method of hyperbranched modified cellulose wood adhesive |
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2019
- 2019-12-31 CN CN201911399882.2A patent/CN111087886A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105273557A (en) * | 2015-10-13 | 2016-01-27 | 中国林业科学研究院木材工业研究所 | Waterborne wood paint and preparation method thereof |
| CN105254770A (en) * | 2015-11-13 | 2016-01-20 | 广西大学 | Preparing method for dialdehyde nano-crystalline cellulose |
| CN105969005A (en) * | 2016-03-01 | 2016-09-28 | 阜阳市金木工艺品有限公司 | Alpha-Fe2O3 modified woodenware coating and preparation method thereof |
| CN106476108A (en) * | 2016-11-15 | 2017-03-08 | 湖北工业大学 | The method for formaldehydeless fiberboard being prepared using dialdehyde cellulose |
| CN109135528A (en) * | 2018-08-17 | 2019-01-04 | 佛山市森昂生物科技有限公司 | A kind of waterborne anti-rust sealer |
| CN113861880A (en) * | 2021-10-21 | 2021-12-31 | 西南林业大学 | Preparation method of hyperbranched modified cellulose wood adhesive |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111978810A (en) * | 2020-08-31 | 2020-11-24 | 北京国原新技术有限公司 | Method for producing coating material and coating material |
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Application publication date: 20200501 |