JPH07500858A - Polymer powder coating composition containing low molecular weight polyethylene polyols - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Polymer powder coating composition containing low molecular weight polyethylene polyols Liethylene copolymer Concerning polymeric powder coating compositions comprising copolymer or polyethylene terpolymer Ru.

It is widely used in the manufacture of other structures that are required to be sealed.

For example, continuous steel pipes are susceptible to corrosion in the environment. in its resistance to action, improvement in its appearance, or in its electrical or thermal insulation properties Equipped with an outer coating of polymeric material for special convenience, including improvements It is hoped that The pond, seamless round bar-like structure or wire type Desirably, the structure also includes an outer coating of polymeric material. In general, such Articles using powder coating compositions are coated with fine powder on the external surface of the object desired to be coated. The uncrosslinked/uncured composition is adhered and then heated, infrared irradiated, or otherwise The composition can be crosslinked/cured using any of a variety of methods, including effective methods of It is made by

Accordingly, this technology includes a variety of teaching materials related to polymeric powder compositions.

In the specification of U.S. Patent No. 4.009.224 (inventor: Warnken), there is a free A stable epoxy resin powder that flows freely is described. This powder is then hardened When sprayed onto a preheated object, it melts and hardens, forming a tough protective film. Ru. This powder composition is a copolymer of 2 to 50% vinyl acetate and 5 to 75% ethylene. The composition contains from 3 to 30 parts per 100 parts of epoxy resin.

Plastics Powder held on March 5th and 6th, 1974 in London, UK. The 4th International Conference on Paints 331 lPlastics Powder Coating Conferene) “Development of Thermoplastic Powders” by G. EyBarret, published in the Proceedings Developments in Thermoplastic Powder In a report entitled ``S)'' various thermoplastics used for protective coatings, Powder properties, application techniques and practical performance are described.

Chemical Abstracts Index No. 98 Near 3886 b. “Properties of cross-linked coating of modified ethylene-vinyl acetate polymer” (P last, Massy 1983. In the section titled Vol. (1), 56) , in combination with a caprolactam-blocked aromatic polyisocyanate crosslinker, Partially saponified ethylene useful for obtaining coatings with excellent physical properties - Compositions containing vinyl acetate copolymer powder are described.

U.S. Pat. No. 4,552,920 describes a type of epoxide resin and a polymeric carbon. A composition useful as a surface coating agent is described, comprising a mixture of carboxylic acid compounds. It is listed.

JP-A No. 56-50941 (published on May 8, 1981, published by Sumitomo Chemical Co., Ltd.) Basically, the following (a) modified ethylene-vinyl acetate copolymer, (b) ) low molecular weight maleic anhydride-styrene copolymer and (C) a small amount in one molecule. Both relate to a resin coating composition comprising an epoxy resin having two epoxy groups.

The weight ratio of these three components (a):(b):(c) is 100:1 to 40:5 It is described as being in the range of ~20.

On the other hand, other polymeric powder coating compositions are known in the art and are commonly used. In fact, most of the coating agents described in that technology are consisting of one olefin polymer or basically a copolymer based on various olefins It consists of a mixture of bodies.

Although these provide useful compositions, the art Contains minimal amounts of optional olefinic materials such as polymers and/or terpolymers. improved adhesion to the surface during the coating process and subsequent use. There remains a continuing need for improved polymeric coating compositions. Furthermore, Paints and coating compositions and their production methods and good adhesion to the substrates to be coated and for articles containing coatings characterized by excellent physical properties, including persistence. There remains a constant demand for It is these and other purposes of the present invention. It is.

In one embodiment, the invention comprises a crosslinkable or curable polymeric resin material. , and furthermore, a low molecular weight saponification agent having a saponification degree of 25% or more, preferably 50% or more. Improved polymeric powder coating compositions containing ethylene copolymers or terpolymers provide something.

Other aspects of the invention include conventional crosslinkable polymeric resin materials or other curable polymeric resins. Contains fatty materials, and also has a low saponification degree (about 25% low molecular weight saponification). Improved polymeric powder coating compositions containing ethylene copolymers or terpolymers are provided. This polymeric powder coating composition is an ethylene copolymer or ethylene ternary It exhibits better physical properties than high-grade 7 resin material grains that do not contain copolymers.

In a further aspect of the invention, the following A crosslinkable or curable conventional polymeric resin material with a degree of saponification of about 25% or less. or more, preferably about 50% or more of a low molecular weight saponified ethylene copolymer or terpolymer and conventional polymer tree for low molecular weight ethylene copolymer. The weight ratio of fat is in the range of 0.01% to 20%/99.99% to 80%, respectively. Melt and mix until Provided is a method for providing an improved polymeric powder coating on an article, the method comprising: be done.

Another aspect of the invention provides an article having a polymeric coating as follows. That is, , this polymeric coating is a type of commonly used crosslinkable polymeric resin material or another hardening material. Polymer resin 1; above, preferably about 50% or more of a low molecular weight saponified ethylene copolymer or and the coating composition contains an ethylene copolymer or terpolymer. -C1 improved flexibility and flexibility compared to similar polymeric coating compositions without copolymer It has improved physical properties including improved impact resistance.

These and other aspects of the invention will become more apparent from the detailed description below. It will be.

Detailed description of the invention The present invention comprises one or more commonly used polymeric powder coating resins as basic components; In addition, at least one type of saponification degree is about 25% or more, preferably about 50%. % or more of low molecular weight ethylene copolymers; The weight ratio of commonly used polymeric powder coating resin to ethylene copolymer is, respectively, Improved polymer powder ranging from 0.01% to 20%/99.99% to 80% A final coating composition is provided. Preferably, the relative weight ratio of these components is 01 % to 15%/99.99% to 85%. Polymer powder coating composition of the present invention The material also includes conventional ingredients well known and used in the polymer powder coating technology field. and may contain additives. Additionally, certain terpolymers are described immediately above. can be used in the same manner as the copolymers described above and below. should be considered interchangeable with other copolymers.

At least one polymeric powder coating composition can be used in the composition according to the invention. Contains commonly used crosslinkable or curable polymeric powder coating resins. Used in this technical field Currently known such paint resins include epoxy coatings. resin, polyester coating resin, acrylic coating resin and Other resins include, but are not limited to. For more information, see Polyisocyanate cross-linked polyester cord is used as the polymer powder coating resin for coating resin, triglycidyl isocyanurate crosslinked polyester coating resin, polyester-epoxy “hybrid” coating resin, trig Lindyl isocyanurate cross-linked acrylic coating resin, polyisocyanate cross-linked acrylic coating resin, hydroxyalkylamine cross-linked poly Ester coating resin, hydroxyalkylamine cross-linked acrylic coating ding resin, amine cross-linked epoxy coating material, acid anhydride cross-linked epoxy oxy-based coating resin, tetramethoxymethyl glycolur ib) Cross-linked acrylic or polyester resins and uretidione (uretidione) There is a cross-linked polyester coating resin. Cross-linked resin is May be aromatic or aliphatic, blocked or unblocked. This may include, for example, blotching with caprolactam and methyl ethyl ketone. There are polyisocyanate-based materials that have been

The low molecular weight ethylene copolymers or terpolymers used according to the invention include: at least partially hydrolyzed (sometimes described as “saponified”) Ethylene-vinyl acetate copolymers with number average molecular weight 1 up to 3υOO (and (original copolymer), preferably with a number average molecular weight not exceeding about 2,700. There are vinyl copolymers. The degree of hydrolysis of this copolymer is at least about 35%, but , preferably at least about 50% saponified. Particularly in the recommended manner, (It is better to have a saponification degree of about 90%, more preferably about 90% to 100%) It is good if it is saponified within a range of %. Ethylene-vinyl acetate copolymer is usually , at least about 10%, preferably about 13% by weight vinyl acetate; Accordingly, it contains about 90%, preferably about 87% by weight of low molecular weight polyethylene. It becomes. In certain recommended embodiments, the percentage of vinyl acetate is about 26% by weight; Correspondingly, the proportion of polyethylene of low molecular weight I is 74% by weight.

The ethylene-vinyl acetate copolymer used in accordance with the teachings of the present invention can be prepared by conventional methods. It can also be produced as a vinyl acetate copolymer, and can be obtained from the market as a vinyl acetate copolymer. may be at least partially hydrolyzed by a method or by another method. Partially hydrolyzed vinyl acetate copolymers may be obtained commercially.

The conventional method used is to combine a small amount of stoichiometrically appropriate low molecular weight polyethylene and vinegar. A copolymer product is produced by copolymerizing a vinyl acid and a vinyl acid in the presence of a catalyst and a chain terminator. It is a method of building. This copolymer product is then treated with a stoichiometric amount of sodium hydroxide. at least one hydroxide such as potassium hydroxide or potassium hydroxide. hydrolyzed to a certain degree. As a commercially available product, AlliAlled-8i's A- C (registered trademark) Performance Additives Divisi There is a product sold under the product name ACtol (tm) from on.

The low molecular weight ethylene terpolymers used in accordance with the present invention include A partially hydrolyzed ethylene-vinyl acetate with a number average molecular weight of ethylene-vinegar terpolymer, preferably having a number average molecular weight of 1 not exceeding about 2,700. There is an acid vinyl copolymer. Desirably, the ethylene-vinyl acetate copolymer further comprises: , containing one or more copolymerized third components selected from the following group: : Styrene, methacrylic acid, 2-ethylhexyl acrylate, ethyl acrylate Leh!・Butyl acrylate, α-methylstyrene, glinone acrylate , acrylonitrile, and methacrylamide. Acrylic acid is the most recommended It is. This ethylene-vinyl acetate terpolymer has the following three components in relative weight percentages: including. That is, ethylene 60-99%, vinyl acetate 1-40%, third component 0-3 Terpolymer with a relative range of 9%. The relative weight percentage of the three components is ethylene 75-99 %, vinyl acetate from 1 to 25%, and third component from 0 to 24%.

Ethylene-vinyl acetate copolymers (and ternary copolymers) useful in the context of the present invention Polymers) may contain one or more of the following functional groups: hydroxyl groups, esters, etc. group, including carboxyl group. Furthermore, this ethylene-vinyl acetate copolymer (and terpolymers) have a hydroxyl number of 50 or more, preferably about 75 and It is recommended to have a hydroxyl number greater than or equal to The hydroxyl value is determined by the usual method. Therefore, it can be determined by titrating the sample with sodium hydroxide.

When preparing compositions according to the invention, one or more low molecular weight ethylene - Vinyl acetate copolymers and/or terpolymers are used.

Additionally, other components that can be used in improved polymeric coating compositions according to the present invention are described. The components include catalyzing agents, flow modifiers, pigments. or colorants such as dyes, fillers, processing aids such as warp, catalysts, matting agents. , and other conventional processing aids, and other conventional additives.

Commonly used organic and inorganic pigments that can be included in the compositions of the invention include carbon black, ultramarine blue, phthalonanide-based dyes, nitrogen dioxide Tan, cadmium sulfide, cadmium selenide sulfide, nigrosine and other faces There is a fee. Generally, such conventional pigments account for about 50% or less by weight of the total composition. It is included in an amount not more than 30% by weight, preferably not more than 30% by weight.

Conventional fluidity modifiers can be used, such as fluidity modifiers such as There are xyl acrylates.

Fillers commonly used in powder coating compositions can be filled into the compositions of the present invention. Wear. It is of both organic and inorganic type. None that can be used Examples of machine fillers include asbestos, calcium silicate, and calcium metasilicate. , aluminum silicate, amorphous silica, precipitated warp, fumed silica, carbonate magnesi umum, kaolin, dolomite, chalk, feldspar, mica, barium sulfate, carbonate There is lucium, and other fillers not listed here.

Known to improve crosslinking and/or curing of polymeric powder coating resin materials. A commonly used contact agent (known in the art and sometimes referred to as an “accelerator”) ) can be incorporated into the composition according to the invention. Generally, these Catalysts are used in applications where the coating composition is crosslinked or cured by applying heat. reducing the required temperature and/or allowing the coated article to be exposed to elevated temperatures. Reduce the required exposure time. Such common contact agents include: but are not limited to ・tin-octoate, dibutyltin dilaure-1, di- Butyltin diacetate.

Common materials used to modify the surface appearance of polymeric coatings include There are matting agents that limit the gloss of the surface. Such matting agents include wax, silicone, bolite) - lafluoroethylene, and other common uses not specifically mentioned here. I have the ingredients.

Processing aids that improve processability when forming polymeric coatings are used in coating compositions. can be included in For example, silica is known in the art as a particulate polymer. Known as a useful processing aid in improving the free-flowing properties of powder coating compositions. Ru. Other commonly used processing aids include crosslinking and/or processing of polymeric components in coating compositions. or benzoin, which is known to reduce pinhole formation during curing. Ru. Furthermore, conventional processing aids not specifically mentioned here may be included in the composition according to the invention. Melt. There are both.

The formulation of the improved polymeric powder coating composition of the present invention includes the low molecular weight Thyrene copolymers (and terpolymers) are commonly used in conventional polymeric powder coating compositions. It is important to understand that it is useful to replace some amount of polymeric powder coating resin for That is, compared to a similar composition without replacement, impact strength, Improvements in physical properties are expected, including improvements in flexibility and interfacial adhesion. .

The conventional polymers to be replaced by the polyethylene copolymers of low molecular weight I described here When determining the amount of molecular powder coating resin, lower molecular weight ethylene copolymers are commonly added to the molecular powder coating composition in varying amounts and then the resulting cured/crosslinked composition. The physical properties of any commonly used polymeric powder coating composition are evaluated using conventional experimental methods. This is an extremely useful method for determining the optimal amount of substitution for low molecular weight ethylene copolymers in products. This will be obvious to those skilled in the art. From such measurements, the desired The optimal degree of substitution corresponding to a set of physical properties is identified.

Preferably a low molecular weight ethylene copolymer to replace conventional polymeric powder coating resins. The weight of conventional polymeric powder coating resins relative to low molecular weight ethylene copolymers The amount ratio is in the range of 0.001% to 20%/99.99% to 80%, respectively. be. More preferably, the relative weight proportions of these individual components are between 0.01% and 1 The range is 5%/99.99% to 85%.

The inventors also describe certain polymeric powder coating compositions as described herein. If you wish to increase the crosslinking/curing rate of the composition, This indicates that the amount of conventional accelerator used may need to be increased. equivalent weight Using a large amount (which is a function of hydroxyl number) of a low molecular weight co-electron itself It has been observed that less conventional accelerators need to be added to the composition.

The degree of increase in the amount of accelerator can be determined experimentally using normal evaluation methods, but It is not expected that more than about 35% by weight will be required.

The improved polymeric powder coating composition according to the present invention can be applied to articles according to conventional methods. It can be used to form molecular coatings.

In typical conventional practice, each component of the composition is measured out, mixed in suitable equipment, and then , the mixed ingredients are fed into the mouth of a heated kneader or extruder, and the mixture is heated. The compound is masticated into a mass and the mass is then extruded into the desired shape.

Shred the extruded strands, films, ribbons (or analogs thereof) into powder Crush or grind into a fine powder. The size of the particles that make up this fine powder is about 200 microns or less, preferably 120 microns or less. It is as follows.

The component mixture is kneaded in the previously described process using a single or twin screw extruder.

The temperature of the extruder barrel should be high enough to ensure melting of the polymer. It is. The temperature in the initial zone following the extruder input ensures rapid melting of the polymer Therefore, it is desirable that the melting point be at least 5 to 10°C higher than the melting point.

The powdered composition can be applied to the surface of the article by any conventional method known in the art. Applicable.

One such method uses a corona discharge gun, which applies a negative electrostatic charge to the powder. the article is grounded, and the negatively charged powder particles are placed on the grounded surface. Spray on. There, particles surface by attracting particles with opposite charges. is maintained. The coated surface is then placed in a heated oven and powdered paint is applied. The polymeric powder coating resin material in the composition is sufficient for crosslinking and/or curing. Hold for a minute. Alternatively, other cross-linking methods such as using infrared radiation or A hardening method can be considered.

Another method useful as an alternative manufacturing method uses a fluidized bed. using this method The method involves heating the surface on which the polymer powder is placed and placing it in a chamber close to the fluidized bed. powder from a fluidized bed, electrostatic attraction, and/or heated articles. As a result of the rapid melting of the powder, the powder collects on its surface and is melted. Ru.

This technical field is known as “tribocharging”. A third alternative known to those skilled in the art is that the electrostatic charge generated by the frictional force Applied to polymeric powder coatings to be coated. Then, the powder is Sucked onto the surface, followed by curing and exposure to high temperatures, usually in an oven. and/or remain on the surface during the crosslinking process.

These commonly used powders are useful for forming a layer of polymeric powder coating on the surface of the article. Each application method subsequently involves melting the particles and forming a continuous polymeric coating. Crosslinked and/or cured to form. This is common in the art. This can be done in several known ways.

One commonly used method is to apply electrostatic and/or other forces onto the Surfaces or articles with polymeric powder coatings held in place using a circulating drying air a sufficient amount to cause an acceptable degree of curing and/or crosslinking to occur. Hold at high temperature for a period of time.

A second alternative is to apply a polymeric powder coating to the article and/or surface and then , in particular irradiation with electromagnetic waves in the infrared spectral region. Infrared frequency light like this curing and curing of the polymeric component of the polymeric powder coating composition on the surface. and/or crosslinking occurs.

Articles or surfaces coated with polymeric powder coatings according to the method of the invention can be coated with a wide variety of materials. Used for assembling various products. For example, according to the method of the invention, cured/crosslinked powder A coated cold-rolled steel sheet or panel is obtained. This includes the following various items Used in the manufacture of, but not limited to: furniture, cabinets, shelving materials , partition plates, automotive, aircraft and aerospace panels, containers , boxes, shelving materials, housing materials, containers for electronic and/or mechanical parts, etc. Pipes and/or wires or cables forming one or more layers pipes, wires, cables, including bull structures, and not listed here. other products.

An advantage of the invention is that smooth sorting or post-forming of panels can be done very well. It is. i.e. coated cold rolled steel by bending or other deformation. A molded plate panel is obtained, and such a molded product is made by bending the panel up to 90 degrees. or even more angles. For those working in the relevant technical field It is recognized that such deformation effects occur within metals, especially within polymeric coatings. Extreme stress will occur within the coating at the bent line.

Advantageously, the compositions of the present invention are advantageous due to the observed high flexibility of the coating. known to be particularly resistant to rupture or failure at locations of extreme stress. It is being This is especially true when the final appearance of the molding or product is concerned. It is beneficial to further reduce the potential of the sorting panel or pond material under it in the environment of use. A seamless layer of thermoplastic resin that guarantees isolation from corrosive effects provide.

Compositions of the invention also include polyethylene copolymers and polyethylene copolymers as described herein. Improved impact resistance compared to similar compositions that do not contain polyethylene terpolymer There is a characteristic that there is

The present invention refers to specific embodiments that are representative examples in accordance with its teachings. This will make it easier to understand. However, the specific The embodiments are intended to be illustrative only and not limiting; Can be carried out in ways other than those specifically described, yet within the scope of the invention You must understand that.

Example In the following examples of compositions in comparative examples and compositions in the present invention, , the following general manufacturing method was used.

The ingredients of each composition are weighed out and put into a blender where they are tri-blended. An essentially homogeneous, well-mixed powder triblend was prepared. next This powdered tri-blend was mixed with two standard Blur teas. One with a pair of screws, supplied to the inlet of a HaaKe twin screw extruder. provided. The temperature distribution of the extruder was set as follows. Zone 1.85°C, Zo Zone 2.115°C: Zone 3, ], 15°C. The population part is cooled with water and the die temperature The temperature was set at approximately 110°C. The rotation speed of the screw is approximately 40 rpm. It was.

The extrudate formulation exiting the die was cooled and then passed through a 1.40 mesh sieve. Subdivided. The particle size of the powder was about 106 microns or less.

The fine powder of each formulation was then transferred to a Ransberg-type motor operated at 70 kV. I put it in my 706 cab gun. This gun is used to apply dry film to cold-rolled steel panels. Sprayed to a thickness of 2.0-2.5 mils. These panels are then heated. It was cured by baking at 182°C for 30 minutes.

This panel was evaluated according to a conventional test protocol that included: Pencil. Standard test method for determining the surface hardness of a film by scratching test, ASTM D336 3 (1980); Pencil hardness by tape test (Tape Te5t) Adhesion according to ASTM D3359 (1987), a standard test method for measuring adhesion : Standard test to evaluate the durability of organic coatings against the effects of sudden deformation (impact). Test method, impact resistance according to ASTM D2794- (1984), pre-painted sheet Standard test method for determining coating flexibility, ASTM D4145 (1983 ) standard test method for determining flexibility and specular gloss, ASTM D523 (198 5) Standard test method for determining the yellowing index of glossy niblastic according to ASTM D19 25 (1977) is resistant to overbaking; If the (“double rubbing”) method for evaluating organic solvents. Softening resistance.

All tests were conducted on cold rolled steel plates as shown here. However, it is impact resistant. This is a commercially available pre-treatment drug from Henkel (Henk, El Corp.). No. 22 gauge treated with the treatment agent “Dendrite” All compositions were evaluated using steel plates.

Recoatability was also evaluated for certain formulation samples. In that case, cold pressurize the blended sample. It was sprayed onto a rolled steel panel and baked at 182℃, but the I took it out. All removed panels were allowed to cool to room temperature and then used for the first painting. The same formulation sample was coated again and placed in the oven once again for cross-linking/crosslinking of the subsequent coating film. Baked for an additional 30 minutes at 182°C to ensure hardening. these panels It was taken out and cooled to room temperature. Closely inspect the painted surface to evaluate the adhesion between the layers. was crosshatched. For all samples tested, to the abutment panel The adhesion of the blended sample or the adhesion between the coating layers was not lost.

Comparative Example C1 A commonly used polyester resin with hydroxyl groups, “Cargil 3000 (Ca rgill)”404g: A commonly used curing agent that is effective when used together with polyester resin. “Cargil 2400” (polyisocyanate blocked with caprolactam) 88 g; commercially available from Monsanto , commonly used fluidity regulator “Modaflow Powder III” Powder III) 5g1 and commercially available titanium dioxide DuPont's “R” A conventional unfilled formulation sample consisting of 900"246 g was prepared as outlined above. Mixed, extruded and ground to a fine powder. The abutment panels were then sprayed and allowed to cure.

Panels coated with a substrate of this C1 formulation were tested according to the test specifications described above. ,evaluated. The test results are shown in Table 1.

-: C11C223 Pencil hardness: F F HB HB IIB Adhesion: 5B 58 58 58 5B impact resistance *・ Direct + 130 > 160 80 > 160 > 160 Reverse ): @40 >160 @40 120 @60 Fail Fail Fail Flexibility **: ＞tToT＞27 ＞27 ＞2T Gloss ***: 84 72 88.5 78 76 Over-baking resistance**: 182℃, 45 minutes: -1,030,8120,790,9791,09918 2℃, 1 hour: -1,350,6140,0182,493,186MEK Strength ++: Impact resistance *, Gardner impact, unit inch-pond Flexibility**: (T bending) Gloss ***・60 degrees at departure Over-seizing resistance **: Unit, delta (yellowing index) MEK resistance ++: Reciprocating friction 100 Cargi I 13000 polyester resin 351g, effective Hardening agent Cargil 12400.100g, low content containing hydroxyl group 39 g of ethylene-vinyl acetate copolymer (number average molecular weight approximately 2400, hydrocarbon About 26% by weight of vinyl acetate with a xyl number of 130-170 and an equivalent weight of 330-430. A polymer that is about 90 to 100% saponified, including the following: The components (referred to as "Polymer E") were prepared as outlined above, extruded, and finely powdered. and then sprayed onto the abutment panels at L1, cured and tested. test results It is shown in Table 1.

With the filler-free composition according to the invention, according to the protocol outlined above, The interfacial adhesion was evaluated. Recoating of panels or articles with the compositions of the invention is possible. Horse (as can be seen, between the composition and the panel, and between the composition layers) It was found that the interfacial adhesion was excellent. The test results are shown in Table 2.

Table 2 ・・Ido＊、″゛＊ Example 12 Adhesion*・ASTM D3359 Hiuratsu U Kyuran 9ヱ The filler-containing formulation according to the conventional method was Cargi 113000: 358 g.

Cargil 12400 Near 8gSModaflow Powder llI4 It contained 216 g of commercially available titanium dioxide "R900". The composition In addition, a product called 5achtleben Blanc Fixe-F was used as a filler. Blanc Fixe91g, which is commercially available under the product name, and commercially available from Cabot. Contains “Cabot TS-530” which is a commercially available fine powder silica filler. I was reading.

These ingredients are mixed, extruded, comminuted to a fine powder, and then The abutment panels were sprayed, cured, and tested. The test results are shown in Table 1.

Five gifts” 1 The filler-containing formulation according to the present invention is Cargi I 13000: 333g , Cargi112400:85g, Modaflow Powder llI 4.5g, commercially available titanium dioxide “R900” 216g5Sachtleben BlancFix, which is commercially available under the product name “Blanc Fixe F” e91g.

and the commonly used fine powder silica filler “CabotT” commercially available from Cabot. This composition was further referred to as Copolymer E. At least partially saponified ethylene-acetic acid as fully described in Example 1 above. It contained 18g of vinyl copolymer.

These ingredients are mixed, extruded, comminuted to a fine powder, and then The abutment panels were sprayed, cured, and tested. The test results are shown in Table 1.

Filler-containing compositions according to the method of the invention according to the protocol outlined above. The interfacial adhesion was evaluated. The compositions of the present invention can be used to recycle panels or articles. The coating is good (as shown in the table below), and between the composition and the panel. It was found that the interfacial adhesion between the composition layers was excellent. The test results are shown in Table 2.

! Jingodan Another filler-containing formulation according to the invention is Cargi 113000.324. g, Cargi112400: 89g, Modaflow Powder II I 4. 5g, commercially available titanium dioxide "R900-216g, 5acht, 1 Blanc, which is commercially available under the product name “ebenBlanc Fixe F” Fixe 91g and regular fine powder silica-filled commercially available from Cabot. It contained 4.5 g of filler "Cabot TS-530".

This composition was further referred to as "Copolymer E" and was fully described in Example 1 above. Contains 26 g of partially saponified ethyl-non-vinyl acetate copolymer. there was.

These ingredients are mixed, extruded, comminuted to a fine powder, and then The abutment panels were sprayed, cured, and tested. The test results are shown in Table 1.

The composition of the invention provides excellent adhesion between the coating and the abutment, as well as multiple layers of the coating. It is characterized by good interfacial adhesion between the parts and good flexibility of the coating on the abutment. To provide a polymer coating composition with high impact resistance.

The specification and examples set forth herein are provided by way of illustration only and by way of limitation. Various modifications may be made without departing from the spirit and scope of the invention. It will be recognized that corrections and changes may be made. The scope of the invention is defined by the appended It is intended to be limited only by the scope of the claims.

Submission of translation of written amendment (Article 184-8 of the Patent Act)

Claims (1)

[Claims] 1. next: (a) polymer powder coating resin; (b) at least one low molecular weight ethylene copolymer having a saponification degree of at least 25%; Union, (c) selected from the group consisting of accelerators, flow control agents, colorants, fillers, and processing aids; another ingredient and the weight ratio of (a) to (b) is 0.01% to 20% and 9 In the range of 9.99% to 80%, Polymeric powder coating composition. 2. The weight ratio of (a) to (b) is 0.01% to 15% and 99.99% to 8 A polymeric powder coating composition according to claim 1, in the range of 5%. 3. Claims: The degree of saponification of the low molecular weight ethylene copolymer is at least 50%. 1. The polymer powder coating composition according to 1. 4. Claims: The degree of saponification of the low molecular weight ethylene copolymer is at least 90%. 3. The polymer powder coating composition according to 3. 5. At least one low molecular weight ethylene copolymer has a number average content of not more than 3000 The polymer according to claim 1, which is an ethylene-vinyl acetate copolymer having a molecular weight of Child powder paint composition. 6. At least one low molecular weight ethylene copolymer is Rilic acid, 2-ethylhexyl acrylate, ethyl atarylate, butyl atarylate ester, α-methylstyrene, glycidyl acrylate, acrylonitrile and further comprising a copolymerization component selected from the group consisting of is an ethylene-vinyl acetate terpolymer having a number average molecular weight not exceeding 0.00 , the polymer powder coating composition according to claim 1. 7. Number average of low molecular weight ethylene-vinyl acetate terpolymer not exceeding 3000 The claimed compound is an ethylene-vinyl acetate-acrylic acid terpolymer having a molecular weight of A polymeric powder coating composition according to scope 6. 8. Polymeric powder coating set exhibiting improved physical properties as claimed in claim 1 A product. 9. next: (a) Melt-mix the composition according to claim 1, prepare a fine powder therefrom, and do (b) coating an article with the finely divided powder; and (c) curing the powder to coat the article with a high Polymers with improved physical properties, including processing steps to form molecular coatings A method of manufacturing an article having a powder coating. 10. At least one molded from the polymeric powder coating composition according to claim 1. Article having two polymer layers.