NZ725667B - Floor wax resistant agent, method for producing wood based panel by adding the same thereto, and the wood based panel - Google Patents

Floor wax resistant agent, method for producing wood based panel by adding the same thereto, and the wood based panel

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Publication number
NZ725667B
NZ725667B NZ725667A NZ72566716A NZ725667B NZ 725667 B NZ725667 B NZ 725667B NZ 725667 A NZ725667 A NZ 725667A NZ 72566716 A NZ72566716 A NZ 72566716A NZ 725667 B NZ725667 B NZ 725667B
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NZ
New Zealand
Prior art keywords
floor wax
resistant agent
weight
fraction
wood based
Prior art date
Application number
NZ725667A
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NZ725667A (en
Inventor
Fukui Keisuke
Okuda Toshiyuki
Taguchi Yoshitaka
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Chukyo Yushi Co Ltd
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Publication date
Priority claimed from JP2015256552A external-priority patent/JP5981016B1/en
Application filed by Chukyo Yushi Co Ltd filed Critical Chukyo Yushi Co Ltd
Publication of NZ725667A publication Critical patent/NZ725667A/en
Publication of NZ725667B publication Critical patent/NZ725667B/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27KPROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K2240/00Purpose of the treatment
    • B27K2240/70Hydrophobation treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27KPROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/34Organic impregnating agents
    • B27K3/44Tar; Mineral oil
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27KPROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/52Impregnating agents containing mixtures of inorganic and organic compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27MWORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/04Manufacture or reconditioning of specific semi-finished or finished articles of flooring elements, e.g. parqueting blocks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27NMANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08Moulding or pressing
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00Materials not provided for elsewhere
    • C09K3/18Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces

Abstract

There is provided a floor wax resistant agent having excellent floor wax resistance. It has been found that a wax and a petroleum resin are used in combination, as a floor wax resistant agent, in predetermined proportions; and that a specific petroleum resin is contained in a predetermined proportion, thereby providing not only water repellency but also stability to organic components such as a floor wax. Specifically, there is provided a floor wax resistant agent to be added to a material in a wood based panel produced by heating and pressurizing the material for improving the floor wax resistance of the wood based panel. The floor wax resistant agent comprises 70% to 90% by weight of a wax containing 10% by mass or less of an oil component and 30% to 10% by weight of a petroleum resin, in 100% by weight of the floor wax resistant agent. The petroleum resin is composed of a copolymer of a C5 fraction and a C9 fraction, a combination of a C5 fraction and a C9 fraction, or combined use of the copolymer and the combination, and comprises, relative to the amount of the amount of the entire petroleum resin: 65% to 20% by weight of the C5 fraction and 35% to 80% by weight of the C9 fraction. n, thereby providing not only water repellency but also stability to organic components such as a floor wax. Specifically, there is provided a floor wax resistant agent to be added to a material in a wood based panel produced by heating and pressurizing the material for improving the floor wax resistance of the wood based panel. The floor wax resistant agent comprises 70% to 90% by weight of a wax containing 10% by mass or less of an oil component and 30% to 10% by weight of a petroleum resin, in 100% by weight of the floor wax resistant agent. The petroleum resin is composed of a copolymer of a C5 fraction and a C9 fraction, a combination of a C5 fraction and a C9 fraction, or combined use of the copolymer and the combination, and comprises, relative to the amount of the amount of the entire petroleum resin: 65% to 20% by weight of the C5 fraction and 35% to 80% by weight of the C9 fraction.

Description

FLOOR WAX RESISTANT AGENT, METHOD FOR PRODUCING WOOD BASED PANEL BY ADDING THE SAME THERETO, AND THE WOOD BASED PANEL This application claims priority from Japanese Application No. 2015-256552 filed on 28 December 2015, the contents of which are to be taken as incorporated herein by this reference.
TECHNICAL FIELD The present invention relates to improvement of a floor wax resistant agent contained in a water repellent composition, the floor wax resistant agent being to be added into wood based panels such as particle boards and MDFs (medium density fiberboards), and other construction materials for improving the floor wax resistance thereof. Further, the present invention relates to a method for producing a wood based panel by adding the floor wax resistant agent thereto, and to the wood based panel.
BACKGROUND ART In general, a water repellent composition is added to a wood based panel in order to ensure its water resistance. For instance, Patent Documents 1 and 2 indicate paraffin wax, petroleum resins, asphalt, silicone-based resins and fluorine-based resins as examples of such a water repellent composition. Among these, paraffin wax is often selected from the viewpoint of cost.
PRIOR ART DOCUMENTS Patent Documents Patent Document 1: JP H06-35547 B Patent Document 2: JP H08-26305 B SUMMARY OF INVENTION Waxes such as paraffin wax have excellent water repellency, and thus impart excellent water resistance to the wood based panels when added to wood based panels.
On the other hand, in the case where a wood based panel is used in a construction material, for example, a floor material, when so-called wax coating is applied to the surface of the floor material, organic components contained in the coating agent penetrate the wood based panel. The penetrating organic components may cause swelling, deformation, discoloration and other adverse effects on the wood based panel.
Waxes have an affinity for organic components, and thus cannot effectively prevent the penetration of the organic components into wood based panel, in such a case.
As a result of intensive studies, the present inventors have found that the use of a wax and a petroleum resin in combination, as the floor wax resistant agent, in predetermined proportions provides not only water repellency, but also stability to organic components including a floor wax agent, i.e., improves floor wax resistance.
Specifically, a first aspect of the present invention is defined as follows.
A floor wax resistant agent to be added to a material in a wood based panel produced by heating and pressurizing the material for improving the floor wax resistance of the wood based panel, the floor wax resistant agent comprising: 70% to 90% by weight, preferably 76% to 84% by weight of a wax containing % by mass or less, preferably 5% by mass or less of an oil component and % to 10% by weight, preferably 24% to 16% by weight of a petroleum resin, in 100% by weight of the floor wax resistant agent, wherein the petroleum resin is composed of a copolymer of a C5 fraction and a C9 fraction, a combination of a C5 fraction and a C9 fraction, or combined use of the copolymer and the combination, and includes, relative to the amount of the entire petroleum resin: 65% to 20% by weight, preferably 34% to 26% by weight of the C5 fraction % to 80% by weight, preferably 66% to 74% by weight of the C9 fraction.
Further, a second aspect of the present invention is defined as follows.
An aqueous emulsion comprising the floor wax resistant agent according to the first aspect and surfactants.
Additionally, a third aspect of the present invention is defined as follows.
The aqueous emulsion according to the second aspect, which comprises 3% to % by weight, preferably 5% to 15% by weight of an active ingredient of the surfactant relative to the amount of the floor wax resistant agent.
The “wood based panel,” as used herein, means hard fiberboards (hard boards), medium density fiberboards (MDFs), particle boards and the like. Among them, medium density fiberboards (MDFs) and particle boards are preferable. The “material” for the wood based panel means materials normally used in the production of the above wood based panels; specifically includes woody materials, such as woody fibers and wood chips, subjected to treatment of, for example, forming into fibers or small pieces according to the production purpose; and can also include any materials so long as they would not inhibit the production of the above wood based panels.
Further, the “heating and pressurizing” for production of the above wood based panels is a production process generally used in the technical field, and preferably hot press is employed therefor. The “addition” of the above floor wax resistant agent to the above material means addition through application, immersion, mixing and the like normally used in the production of the above wood based panels, and is preferably spray application. Also, the floor wax resistant agent may be applied alone or as a mixture with a glue or the like.
The “floor wax resistance,” as used herein, means penetration resistance to organic components in a wood based panel to which a floor wax resistant agent or a water repellent composition has been added, and is determined by using, as indexes, the thickness swelling (%) and penetration distance (mm) of a test piece of the obtained wood based panel (medium density fiberboard: MDF). The testing method is as follows.
The obtained wood based panel (medium density fiberboard: MDF) is cut into cm square to prepare a test piece, and the density thereof is calculated from the weight and outer dimension. Thereafter, an OPP tape (Orien tape No. 830 manufactured by SEKISUI CHEMICAL CO., LTD.) is attached to both surfaces of the test piece, and the test piece is immersed in a floor wax (All manufactured by RINREI WAX CO., LTD.) up to a height of 3 cm from the cut part. After 5 minutes, the test piece is removed.
Measured are the thickness swelling at both end parts in a position of 1.5 cm in height and the distance which represents a swelling caused by penetration from the end parts to the center part in a position of 1.5 cm in height as the penetration distance.
Usable as the above wax are those generally used in water repellent compositions, such as olefin wax, montan wax and Fischer-Tropsch wax, in addition to paraffin wax. The “10% by mass or less of an oil component,” in the context of the wax according to the present invention, means a numerical value of an oil component as measured by the measuring method defined in JIS K2235 5.6.
The petroleum resin is a product obtained by polymerization, without isolation, of diolefins and monoolefins contained in decomposed oil fractions produced, as a byproduct, from an ethylene plant for producing ethylene, propylene and the like by steam cracking of petroleum, and is roughly classified into the following three types: an aliphatic or C5-based petroleum resin prepared by using a C5 fraction in decomposed oil fractions as a raw material; an aromatic or C9-based petroleum resin prepared by using a C9 fraction as a raw material; and a C5C9 copolymerized petroleum resin or a copolymer of a C5 fraction and a C9 fraction prepared by using both of them as raw materials, which is referred to also as a combination of a C5 polymerized petroleum resin and a C9 polymerized petroleum resin, a combination of a C5 fraction and a C9 fraction, or combined use of the above copolymer and the above combination.
The C5-based petroleum resin includes a copolymer of isoprene, piperylene, 2-methylbutene-1, 2-methylbutene-2 or the like as its main component, and conjugated diolefins often have a cyclized structure. It’s softening point ranges from 70 C to 100 C. The C9-based petroleum resin mainly includes a copolymer of styrene, vinyltoluene, α-methylstyrene or indene, and has a softening point ranging from 80 C to 150 C. The C5C9 copolymerized petroleum resin is a copolymer of C5 and C9 as described above, and has a softening point ranging from 60 C to 100 C. The combination of a C5 polymerized petroleum resin and a C9 polymerized petroleum resin is any combination of C5 and C9 as described above, and has a softening point ranging from 60 C to 150 C, and may also be any combined use of the above copolymer and the above combination.
Conventionally, the wax and petroleum resin have been added together in wood based panels in order to impart waterproof property. The use of them together is also suggested in Patent Documents 1 and 2. More specifically, Example 2 of Patent Document 1 discloses a formulation example in which paraffin wax: petroleum resin = 96 parts by weight: 2 parts by weight. Similarly, Example 8 of Patent Document 2 discloses a formulation example in which paraffin wax: petroleum resin = 96 parts by weight: 1 part by weight.
On the other hand, the first aspect of the present invention is intended to improve the resistance to floor wax agents and other organic components by defining the formulation ratio between the wax containing 10% by mass or less of an oil component and the petroleum resin as the former: the latter = 70% to 90% by weight: % to 10% by weight, in 100% by weight of the above floor wax resistant agent, by employing a copolymer of a C5 fraction and a C9 fraction, a combination of a C5 fraction and a C9 fraction or combined use of the above copolymer and the above combination as the above petroleum resin, and by incorporating the above C5 fraction in an amount of 65% to 20% by weight and the above C9 fraction in an amount of 35% to 80% by weight relative to the amount of the entire petroleum resin.
While the total amount of the above wax and the above petroleum resin in the above floor wax resistant agent may be 100% by weight, the floor wax resistant agent may contain other components, such as a wax containing more than 10% by mass of an oil component, asphalt or a fluorine resin in a proportion of less than 20% by weight so long as such components would not deteriorate the floor wax resistance of the above floor wax resistant agent.
When the wax and the petroleum resin can be mutually melted, the melt can be dispersed, as a dispersoid, in water (dispersion medium) after melting to prepare an aqueous emulsion. When a C9-based petroleum resin is adopted as the petroleum resin, it cannot be melted with the wax. Therefore, in this case, the wax and the petroleum resin are respectively formed into emulsions, and the resultant emulsions are then mixed. Of course, a wax and a petroleum resin, which can be mutually melted, may be individually formed into emulsions, and then these emulsions may be mixed.
Surfactants usable in the preparation of the aqueous emulsion according to the present invention include anionic, cationic, nonionic or amphoteric surfactants, water-soluble polymer compounds and the like. These surfactants can be used alone, or several kinds thereof can be used in combination. Examples of those surfactants are indicated below, but other components are not limited thereto.
Examples of the anionic surfactant include fatty acid salts, polyoxyethylene alkyl ether carboxylates, dialkyl sulfosuccinates, alkylbenzene sulfonates, alkyl ether sulfates and alkyl phosphates.
Examples of the cationic surfactant include alkylamine salts, quaternary ammonium salts and alkyl pyridinium salts.
Examples of the nonionic surfactant include polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene sorbitan fatty acid partial ester and fatty acid diethanolamide.
Examples of the amphoteric surfactant include alkylbetaine and alkylamine oxide.
Examples of the water-soluble polymer compound include methyl cellulose, carboxyl methyl cellulose, modified starches, gum Arabic, polyvinyl alcohol, polyacrylate, styrene-maleic anhydride copolymer salts and polyethylene glycol.
The aqueous emulsion in the present invention can contain, in addition to the above wax or the above petroleum resin, other components necessary to disperse or dissolve those components in a solvent.
Next, a fourth aspect of the present invention is defined as follows.
A method for producing a wood based panel comprising the following steps of: providing the floor wax resistant agent according to the first aspect; adding the floor wax resistant agent to a material for the wood based panel; and heating and pressurizing the material to which the floor wax resistant agent has been added.
Further, a fifth aspect of the present invention is defined as follows.
The method for producing a wood based panel according to the fourth aspect, further comprising the step of preparing an aqueous emulsion of the floor wax resistant agent, wherein, in the step of adding the floor wax resistant agent to a material, the emulsion is applied to the material, and then dried.
Additionally, a sixth aspect of the present invention is defined as follows.
The method for producing a wood based panel according to the fourth aspect, wherein, in the step of adding the floor wax resistant agent to a material, the floor wax resistant agent is added, in an amount of 0.3% to 5% by weight, preferably 0.5% to 2% by weight, to the material.
Also, a seventh aspect of the present invention is defined as follows.
A wood based panel obtained by the producing method according to any one of the fourth to sixth aspects.
Incidentally, the detailed requirements of the fourth to sixth aspects are similar to those of the above first and second aspects in their overlapping parts.
Further, an eighth aspect of the present invention is defined as follows.
A wood based panel obtained by adding the floor wax resistant agent according to the first aspect to a material for the wood based panel, wherein the wood based panel having a thickness swelling (%) of 4.4 or less and a penetration distance (mm) of 0.9 or less, when the wood based panel is cut into 5 cm square to prepare a test piece; the density of the test piece is calculated from the weight and outer dimensions; an OPP tape (Orien tape No. 830 manufactured by SEKISUI CHEMICAL CO., LTD.) is then attached to both surfaces of the test piece; the test piece is immersed in a floor wax (All manufactured by RINREI WAX CO., LTD.) up to a height of 3 cm from the cut part; the test piece is removed after 5 minutes; the thickness swelling (%) at both end parts in a position of 1.5 cm in height is calculated; and the distance which represents a swelling caused by penetration from the end parts to the center part in a position of 1.5 cm in height is measured as the penetration distance (mm).
The wood based panels of the present invention has a thickness swelling (%) of 2/3 or less and a penetration distance (mm) of 1/2 or less, as compared with woody boards to which a commercial water repellent (Selosol R-170 manufactured by CHUKYO YUSHI CO., LTD.) has been added, and exhibits excellent floor wax resistant effect.
Hereinafter, Examples, Reference Examples and Comparative Examples which demonstrate the effects of the inventions according to the first to eighth aspects will be described.
As used herein, the unit “part(s)” refers to part(s) by weight, and the symbol “%” represents % by weight, unless otherwise noted.
(Reference Example 1) <Preparation of water repellent composition> Ninety (90) parts of paraffin wax containing 2.0% by mass of an oil component and having a melting point of 56 C and 10 parts of a C5-based petroleum resin having a softening point of 98 C were molten by heating, thereby producing a floor wax resistant agent. The above floor wax resistant agent (wax/resin melt) was added, while stirring, to a solution obtained by mixing 7.2 parts of a potassium salt of a styrene-maleic anhydride copolymer and 0.8 part of partially saponified PVA as surfactants and 162 parts of water and heating the mixture to 90 C for emulsification. The emulsified product was micronized by means of a homogenizer, and then cooled, thereby preparing an emulsion of 40% by weight as non-volatile rate having an average particle size of 1.5 m (water repellent composition of Reference Example 1). <Preparation of MDF> Indicated is an example in which MDF is prepared as a wood based panel.
To woody fibers dried to a water content of 5%, the above-obtained water repellent composition and polymeric MDI (MILLIONATE MR-200 manufactured by TOSOH CORPORATION) were each spray-applied while stirring with a blender, so that the percentage of the former was 0.7% in terms of solid content (floor wax resistant agent) and the percentage of the latter was 7% in terms of solid content. Further, stirring and drying were carried out under airflow, thereby preparing a woody fiber mixture having a water content of 15%. <Hot press molding> A wood frame (40 cm square) was put on a stainless molded plate having a surface onto which a releasing agent (Rikeizai R-599 manufactured by CHUKYO YUSHI CO., LTD.) had been applied in advance, and the above-obtained woody fiber mixture was uniformly placed within the wood frame for molding. After removal of the wood frame, another stainless molded plate treated with the releasing agent was placed above this molded plate, and the two molded plates were hot pressed at 25 kgf/cm for 1 minute by means of a hot pressing device at a press temperature of 180 C so as to attain a thickness of 3 mm for forming. After forming, the formed product was polished 0.2 mm from the surface by means of a sander, thereby preparing MDF.
(Reference Examples 2 and 3) A water repellent composition of Reference Example 2 was prepared in the same manner as in Reference Example 1, except for employing 80 parts of paraffin wax and 20 parts of a C5-based petroleum resin as the floor wax resistant agent.
A water repellent composition of Reference Example 3 was prepared in the same manner as in Reference Example 1, except for employing 70 parts of paraffin wax and 30 parts of a C5-based petroleum resin as the floor wax resistant agent.
(Comparative Examples 1 to 3) A water repellent composition of Comparative Example 1 was prepared in the same manner as in Reference Example 1, except for employing 100 parts of paraffin wax, without using a C5-based petroleum resin, as the floor wax resistant agent.
A water repellent composition of Comparative Example 2 was prepared in the same manner as in Reference Example 1, except for employing 95 parts of paraffin wax and 5 parts of a C5-based petroleum resin as the floor wax resistant agent.
A water repellent composition of Comparative Example 3 was prepared in the same manner as in Reference Example 1, except for employing 60 parts of paraffin wax and 40 parts of a C5-based petroleum resin as the floor wax resistant agent.
(Comparative Example 4) A water repellent composition of Comparative Example 4 was prepared in the same manner as in Reference Example 1, except for employing the product (trade name: Selosol R-170) sold by the applicant CHUKYO YUSHI CO., LTD. as the floor wax resistant agent. <Evaluation of floor wax resistance> MDFs obtained in the respective Reference Examples and Comparative Examples were cut into 5 cm square to prepare test pieces. After calculation of the density thereof from the weight and outer dimensions, an OPP tape (Orien tape No. 830 manufactured by SEKISUI CHEMICAL CO., LTD.) was attached to both surfaces of the test pieces. The test pieces were immersed in a floor wax (All manufactured by RINREI WAX CO., LTD.) up to a height of 3 cm from the cut part. The test pieces were removed after 5 minutes, and the thickness swelling (%) at both end parts in a position of 1.5 cm in height was calculated, and the distance representing a swelling caused by penetration from the end parts to the center part in a position of 1.5 cm in height was measured as a penetration distance. Table 1 indicates the obtained results.
[Table 1] Reference Reference Reference Comparative Comparative Comparative Comparative Example 1 Example 2 Example 3 Example 1 Example 2 Example 3 Example 4 C5-based C5-based C5-based C5-based C5-based Petroleum resin petroleum petroleum petroleum petroleum petroleum Floor wax resin resin resin resin resin R-170 resistant agent Wax/resin ratio (%) 90/10 80/20 70/30 100/0 95/5 60/40 Board density (g/cm ) 0.81 0.80 0.80 0.80 0.79 0.81 0.80 Thickness swelling .4 4.6 6.2 7.8 6.6 8.0 6.6 Floor wax (%) resistance Penetration distance 1.3 1.1 1.6 2.9 1.9 2.0 1.8 (mm) From the results indicated in Table 1, the wood based panels of the Reference Examples including a water repellent composition have excellent floor wax resistance, and have excellent properties as compared with the water repellent now sold by the applicant CHUKYO YUSHI CO., LTD.
Also, it can be understood from the results of Comparative Examples 2 and 3 that the formation ratio of the wax and the petroleum resin is preferably the former: the latter = 90% to 70% by weight: 10% to 30% by weight.
More preferably, the formulation ratio is the former: the latter = 84% to 76% by weight: 16% to 24% by weight.
(Reference Example 4 and Examples 1 to 3) A water repellent composition of Reference Example 4 was prepared in the same manner as in Reference Example 2, except for employing a C5C9-based petroleum resin (C5 proportion: 70%, softening point: 72 C) as the petroleum resin contained in the floor wax resistant agent.
A water repellent composition of Example 1 was prepared in the same manner as in Reference Example 2, except for employing a C5C9-based petroleum resin (C5 proportion: 60%, softening point: 96 C) as the petroleum resin contained in the floor wax resistant agent.
A water repellent composition of Example 2 was prepared in the same manner as in Reference Example 2, except for employing, a C5C9-based petroleum resin (C5 proportion: 50%, softening point: 70 C) as the petroleum resin contained in the floor wax resistant agent.
A water repellent composition of Example 3 was prepared in the same manner as in Reference Example 2, except for employing C5C9-based petroleum resin (C5 proportion: 30%, softening point: 95 C) as the petroleum resin contained in the floor wax resistant agent.
(Example 4) A water repellent composition of Example 4 was prepared in the same manner as in Reference Example 2, except for employing 6 parts of a C5-based petroleum resin having a softening point of 98 C and 14 parts of a C9-based petroleum resin having a softening point of 94 C as the petroleum resin (combination of C5 fraction and C9 fraction) contained in the floor wax resistant agent, and is similar to that of Reference Example 2 except that an emulsion of 40% by weight as non-volatile rate having an average particle size of 1.4 m was obtained.
These water repellent compositions of Reference Examples 2 and 4 and Examples 1 to 4 were also tested in terms of floor wax resistance, in the same manner as in Reference Examples 1 to 3. Table 2 indicates the test results.
[Table 2] Reference Reference Comparative Example 1 Example 2 Example 3 Example 4 Example 4 Example Example C5-based C5C9-base C5C9-based C5C9-based C5C9-based Petroleum -based petroleum d petroleum petroleum petroleum petroleum resin mixture resin resin resin resin resin Floor wax C5/C9 ratio (%) resistant agent Softening 、 point ( C) Wax/resin ratio (%) Board density (g/cm ) Thickness swelling (%) Floor wax Penetration resistance distance (mm) Note 1) The wax and the petroleum resin were formed into emulsions after melting, in the water repellent compositions of Reference Examples 2 and 4 and Examples 1 to 4.
It can be understood, from the results indicated in Table 2, that the use of a C5C9-based copolymer resin or a C5C9-based mixture as the petroleum resin further improves the floor wax resistance. Preferably, the C5 proportion of the C5C9-based petroleum resin is relatively small, and is defined as 65% to 20% from this viewpoint.
More preferably, the C5 proportion is defined as 34% to 26%.
Hereinafter, the C9-based petroleum resin will be reviewed. Since the C9-based petroleum resin would not be melted with the wax, a water repellent composition was prepared as follows in Reference Example 5. <Method for preparing water repellent composition of Reference Example 5> One hundred (100) parts of paraffin wax having a melting point of 56 C and containing 2.0% by mass of an oil component was melted by heating. The wax melt was added, while stirring, into a solution obtained by mixing 5.0 parts of potassium stearate, 0.6 part of partially saponified PVA and 162 parts of water and heating the mixture to 90 C for emulsification. The emulsified product was micronized by means of a homogenizer, and then cooled, thereby preparing an emulsion of 40% by weight as non-volatile rate having an average particle size of 1.5 m and including a floor wax resistant agent. One hundred (100) parts of a C9-based petroleum resin having a softening point of 94 C was dissolved in 100 parts of toluene. The resin solution was added, while stirring, to an aqueous solution containing 12 parts of an ammonium salt of a styrene-maleic anhydride copolymer and 45 parts of water for emulsification. The emulsified product was micronized by means of a homogenizer, and, thereafter, 123 parts of water was added thereto. Toluene was removed under reduced pressure, thereby preparing an emulsion of 40% by weight as non-volatile rate having an average particle size of 1.0 m. The obtained wax emulsion and resin emulsion were mixed in a wax /resin ratio of 80/20, thereby preparing a water repellent composition of Reference Example 5.
(Reference Example 6 and Examples 5 to 7) A water repellent composition of Reference Example 6 was prepared in the same manner as in Reference Example 5, except for employing a C5C9-based petroleum resin (C5 proportion 70%) as the petroleum resin contained in the floor wax resistant agent.
A water repellent composition of Example 5 was prepared in the same manner as in Reference Example 5, except for employing a C5C9-based petroleum resin (C5 proportion 60%) as the petroleum resin contained in the floor wax resistant agent.
A water repellent composition of Example 6 was prepared in the same manner as in Reference Example 5, except for employing a C5C9-based petroleum resin (C5 proportion 50%) as the petroleum resin contained in the floor wax resistant agent.
A water repellent composition of Example 7 was prepared in the same manner as in Reference Example 5, except for employing a C5C9-based petroleum resin (C5 proportion 30%) as the petroleum resin contained in the floor wax resistant agent.
(Comparative Examples 5 and 6) A water repellent composition of Comparative Example 5 was prepared in the same manner as in Reference Example 2, except for employing rosin-modified glycerol ester having a softening point of 84 C in place of the petroleum resin contained in the floor wax resistant agent.
A water repellent composition of Comparative Example 6 was prepared in the same manner as in Reference Example 5, except for employing an isobutyl methacrylate resin having a glass transition point of 48 C in place of the petroleum resin.
These water repellent compositions of Reference Examples 5 and 6 and Examples 5 to 7 as well as Comparative Examples 5 and 6 were also tested in terms of floor wax resistance in a similar manner as in Reference Examples 1 to 3. Table 3 indicates the test results.
[Table 3] Reference Reference Reference Comparative Comparative Comparative Example 5 Example 6 Example 7 Example 2 Example 6 Example 5 Example 4 Example 5 Example 6 C5-based C5C9-based C5C9-based C5C9-based C5C9-base C9-based Petroleum resin petroleum petroleum petroleum petroleum d petroleum petroleum Isobutyl Rosin-modified Floor wax resin resin resin resin resin resin methacrylate glycerol ester resistant R-170 resin C5/C9 ratio (%) 100/0 70/30 60/40 50/50 30/70 0/100 agent Wax/resin ratio (%) 80/20 80/20 80/20 80/20 80/20 80/20 80/20 80/20 Board density (g/cm ) 0.80 0.80 0.81 0.79 0.81 0.80 0.80 0.81 0.79 Thickness swelling (%) 4.6 4.6 4.4 4.4 4.2 4.5 6.6 7.0 10.2 Floor wax resistance Penetration distance 1.1 1.0 0.9 0.8 0.9 1.1 1.8 2.3 2.6 (mm) Note 1) The wax and the petroleum resin were independently formed into emulsions, in the water repellent compositions of Reference Examples 5 and 6, Examples 5 to 7 and Comparative Example 6.
Note 2) The wax and the petroleum resin were formed into emulsions after melting, in the water repellent compositions of Reference Example 2 and Comparative Example 5.
From the results indicated in Table 3, the C9-based petroleum resin also exerts excellent floor wax resistance when used in a predetermined proportion together with the wax.
Also, it can be understood that the wax component and petroleum resin component which constitute the water repellent composition have equivalent floor wax resistant performance when formed into emulsions after melting and when independently formed into emulsions, if they can be mutually melted.
(Comparative Example 7) A water repellent composition of Comparative Example 7 was prepared by employing paraffin wax having a melting point of 51 C and containing 20.8% by mass of an oil component in place of the paraffin wax having a melting point of 56 C and containing 2.0% by mass of an oil component in Example 3. Except this, the preparation of a water repellent composition, preparation of MDF and hot press molding were carried out in the same manner as in Example 3, and the obtained MDF was tested in terms of floor wax resistance. Table 4 indicates the test results.
[Table 4] Example 3 Comparative Example 7 Oil component (% by 2.0 20.8 Floor wax resistant mass) agent Petroleum resin C5C9-based C5C9-based petroleum resin petroleum resin C5/C9 ratio (%) 30/70 30/70 95 95 Softening point ( C) Wax/resin ratio (%) 80/20 80/20 Board density (g/cm ) 0.79 0.79 Floor wax resistance Thickness swelling 4.3 7.6 Penetration distance 0.8 2.4 (mm) From the results indicated in Table 4, the use of a wax containing 10% by mass or less of an oil component provides excellent floor wax resistance.
The present invention is not limited by the description of the above embodiments of the invention. Various modifications are also encompassed in the present invention so long as they would be easily arrived at by those skilled in the art without departing from the scope of claims.
In the above examples, this water repellent composition comprising the floor wax resistant agent according to the present invention is exclusively used in wood based panels, but can also be applied to other materials including papers, fibers, cement and soil improving materials, and the like.
The wax, petroleum resin and surfactant which constitute the water repellent composition and, further, their amounts to be added to the material to be applied, such as a wood based panel, are arbitrarily selected, for example, depending on the intended use and the like of the material to be applied.

Claims (9)

The claims defining the invention are as follows:
1. A floor wax resistant agent to be added to a material in a wood based panel produced by heating and pressurizing the material for improving the floor wax resistance of the wood based panel, the floor wax resistant agent comprising: 70% to 90% by weight of a wax containing 10% by mass or less of an oil component and 30% to 10% by weight of a petroleum resin, in 100% by weight of the floor wax resistant agent, wherein the petroleum resin is composed of a copolymer of a C5 fraction and a C9 fraction, a combination of a C5 fraction and a C9 fraction, or combined use of the copolymer and the combination, and comprises, relative to the amount of the entire petroleum resin: 65% to 20% by weight of the C5 fraction and 35% to 80% by weight of the C9 fraction.
2. An aqueous emulsion comprising the floor wax resistant agent according to claim 1 and a surfactant.
3. The aqueous emulsion according to claim 2, which comprises 3% to 20% by weight of an active ingredient of the surfactant relative to the amount of the floor wax resistant agent.
4. A method for producing a wood based panel comprising the following steps providing the floor wax resistant agent according to claim 1; adding the floor wax resistant agent to a material for the woody board; and heating and pressurizing the material to which the floor wax resistant agent has been added.
5. The method for producing a wood based panel according to claim 4, further comprising the step of preparing an aqueous emulsion of the floor wax resistant agent, wherein, in the step of adding the floor wax resistant agent to a material, the emulsion is applied to the material, and then dried.
6. The method for producing a wood based panel according to claim 4, wherein, in the step of adding the floor wax resistant agent to a material, the floor wax resistant agent is added, in an amount of 0.3% to 5% by weight, to the material.
7. A wood based panel obtained by the method according to any one of claims 4 to 6.
8. A wood based panel obtained by adding the floor wax resistant agent according to claim 1 to a material for the wood based panel, the wood based panel having a thickness swelling (%) of 4.4 or less and a penetration distance (mm) of 0.9 or less, when the wood based panel is cut into 5 cm square to prepare a test piece; the density thereof is calculated from the weight and outer dimensions; an OPP tape is then attached to both surfaces of the test piece; the test piece is immersed in a floor wax up to a height of 3 cm from the cut part; the test piece is removed after 5 minutes; the thickness swelling (%) at both end parts in a position of 1.5 cm in height is calculated; and the distance which represents a swelling caused by penetration from the end parts to the center part in a position of 1.5 cm in height is measured as the penetration distance (mm).
9. A floor wax resistant agent according to claim 1, substantially as hereinbefore described with reference to any one of the Examples.
NZ725667A 2015-12-28 2016-10-27 Floor wax resistant agent, method for producing wood based panel by adding the same thereto, and the wood based panel NZ725667B (en)

Applications Claiming Priority (2)

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JP2015-256552 2015-12-28
JP2015256552A JP5981016B1 (en) 2015-12-28 2015-12-28 Water-repellent composition and wooden board to which this is added

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NZ725667B true NZ725667B (en) 2018-01-30

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