CN113249016B

CN113249016B - TMMGU system powder coating catalyst composition capable of providing texture effect and powder coating

Info

Publication number: CN113249016B
Application number: CN202110692511.4A
Authority: CN
Inventors: 张皓; 李卓衡; 赵成成; 徐斌; 童乃斌
Original assignee: Anhui Huaan Import And Export Co ltd
Current assignee: Anhui Huaan Import And Export Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-04-22
Anticipated expiration: 2041-06-22
Also published as: CN113249016A

Abstract

The invention discloses a TMMGU system powder coating catalyst composition capable of providing texture effect and a powder coating, and relates to the technical field of powder coatings. According to the invention, through different selections of sulfonic acid compounds in the composition, different texture effects can be obtained by the sulfonic acid compounds and tertiary amine compounds, the texture effect can be a new water ripple, and the water ripple has no related report in TMMGU system powder coating; the texture may also be moir e and is different from the moir e powder coatings reported previously in that no epoxy compound is added. The powder coating containing the catalyst composition has clear and uniform surface texture, good continuity, obvious decorative effect and good reproducibility after being cured.

Description

TMMGU system powder coating catalyst composition capable of providing texture effect and powder coating

Technical Field

The invention relates to the technical field of powder coatings, in particular to a TMMGU system powder coating catalyst composition capable of providing a texture effect and a powder coating.

Background

The powder coating is a coating which contains 100 percent of solid and is coated in a powder form, is different from a common solvent type coating and a water-based coating, is more energy-saving and environment-friendly without solvent pollution, and has development advantages due to the remarkable characteristics of no solvent, resource saving, high performance and the like.

With the continuous development of powder coatings, people have not satisfied with the common planar powder coatings, and increasingly demand texture powder coatings with beautiful appearance and strong decorative effect. Such as anti-theft doors, safes, hardware tools, office supplies, artware and the like. These powder coatings with a textured decorative effect are mainly wrinkled, lined, snakeskin, hammered, cracked, sanded, etc.

It is well known that the preferred solution for preparing the above described powder coatings with a textured finish is a curing system of a hydroxy polyester resin, an amino resin curing agent and an acidic catalyst, i.e. a TMMGU system powder coating. The hydroxy polyester resin can be conveniently obtained by a commercial route; amino resin curing agents, typically of the glycoluril type, preferably selected from the group consisting of tetra (methoxymethyl) glycoluril (abbreviated as TMMGU, n, n ', n ", n'" -tetramethylethylene glycol), chemical structure:

under the action of an acid catalyst, the hydroxyl polyester resin and the amino resin curing agent are subjected to a chemical crosslinking reaction, which specifically comprises the following steps:

patent US5817709, which is incorporated herein by reference in its entirety, discloses various catalysts for catalyzing the crosslinking reaction of amino resins. However, patent US5817709 discloses powder coating compositions with MTSI (4-methyl-N- (methylsulfonyl) -benzenesulfonamide) as catalyst, hydroxy polyester resin as film-forming resin, and the above amino resin as curing agent, which powder coating compositions do not achieve a texturing effect.

Patent US5447751 discloses a powder coating system of hydroxy polyester/amino resin using a cyclamic acid as catalyst, characterised by a texture of wrinkles, which is incorporated herein by reference in its entirety.

Patent US5695852, which is incorporated herein by reference, discloses a powder coating system of hydroxyl polyester resin/amino resin using a diethylamine triflate as catalyst, characterized by wrinkles. The addition of a small amount of epoxy resin to the creping solution disclosed in patent US5695852 also makes it possible to obtain a powder coating of the moir e.

As a derivative of the two issued patents mentioned above, an improvement has been developed in the art to use standard powder coatings made as described in US5447751 and US5695852, respectively, as a base powder and then to such base powder to achieve the desired texture by dry blending with a dry blend additive, such as an embossing agent. Specifically, the addition of dry-blended additives to the base powders described in patent US5447751 generally results in snakeskin lines, whereas the addition of dry-blended additives to the base powders described in patent US5695852 results in moire lines.

Patent CN107151475A discloses a powder coating composition with moire effect. It is basically composed of one or more hydroxy polyester resins, amino resin cross-linking agents, sulfonic acid imide type catalysts, leveling/degassing agents and pigments and fillers, and epoxy resins are added, and the construction process is a dry mixing method, which is incorporated by reference in its entirety.

The lines described in the art are generally referred to as wrinkles, i.e. the solutions disclosed in the above-mentioned patents US5447751 and US 5695852. The characteristic texture aspect of the wrinkle is shown in fig. 3. The water wave of the powder coating with the water wave texture features defined in the present invention has a texture effect similar to the water wave ripple features, and the characteristic layout is shown in fig. 1.

Patent CN101143990A discloses a thermosetting water wave powder coating, whose raw materials include epoxy resin, polyester resin, barium sulfate, light calcium carbonate, water wave agent, which is incorporated by reference in its entirety. The patent CN101143990A discloses a technical solution for realizing the water wave pattern powder coating by adding a water wave pattern agent into a mixed system powder coating, and the patent CN101143990A does not provide the characteristic texture layout picture.

Patent CN107189629A discloses a water-textured powder coating and a preparation method thereof. The raw materials include epoxy resin, carboxyl-terminated polyester resin, dicyandiamide, polyacrylate, barium sulfate, light calcium carbonate, amine-blocked sulfonic acid catalyst, methylimidazole and pigment, which are cited as references in the whole. Similarly, patent CN107189629A does not provide a characteristic texture layout picture.

Triethylene diamine is an important organic synthesis intermediate, is commonly used for synthesizing light-stable materials, and is widely used for polyurethane foam, elastomers, plastic products and molding processes. It is also an initiator of polymer, and can be used as catalyst for ethylene polymerization, catalyst for ethylene oxide hydrocarbon polymerization, etc., and its derivative can be used as corrosion inhibitor, emulsifier, etc.

The chemical reaction principle of the TMMGU system powder coating determines that an acid catalyst needs to be added in the formula composition, the storage stability of the powder coating is reduced due to the use of the acid catalyst, and theoretically, a weak alkaline compound can react with a sulfonic acid catalyst used in the TMMGU system to generate a corresponding strong acid weak base salt so as to reduce the catalytic activity of the acid catalyst, so that the aim of improving the storage stability of the TMMGU system is fulfilled.

Surprisingly, in the process of researching TMMGU system powder coating, the triethylene diamine compound is added into a hydroxyl polyester resin/amino resin powder coating system taking a sulfonic acid compound as a catalyst to obtain a special powder coating with water ripple texture characteristics, and a powder coating with moire texture characteristics can be obtained by selecting different sulfonic acid catalysts, and the composition raw materials of the moire texture powder coating do not contain epoxy functional substances, so that the invention is completed.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a TMMGU system powder coating catalyst composition capable of providing texture effects, and different texture effects can be obtained by selecting different sulfonic acid compounds and tertiary amine compounds in the composition.

The TMMGU system powder coating catalyst composition capable of providing texture effect comprises a tertiary amine compound and a sulfonic acid compound.

Preferably, the tertiary amine compound has a structural formula shown in formula (I):

wherein R is₁Is H or

R₂Is a C1-4 straight chain or branched chain alkyl, and n is an integer of 0-6.

When the above R is₁When the tertiary amine compound is H, the tertiary amine compound is triethylene diamine;

when the n is 0, the tertiary amine compound is hydroxyl triethylene diamine; when n is 1, the tertiary amine compound is hydroxymethyl triethylene diamine.

Preferably, the sulfonic acid compound is one of a sulfonamide compound, an ammonia or amine-blocked sulfonic acid compound.

Preferably, the sulfonyl imide compound has a structural formula shown as formula (II):

wherein R is₃Is straight-chain alkyl, branched-chain alkyl, cycloalkyl, fluoroalkyl, N-dialkylamino consisting of 1-20 carbon atoms, aryl or aromatic heterocycle of 1-20 carbon atoms and a substitute thereof; the substituent is a mono-substituted, di-substituted, tri-substituted, tetra-substituted or penta-substituted compound, and the substituent is hydrogen, fluorine, alkyl, fluoroalkyl, aryl, haloaryl, carboxyl, sulfydryl, vinyl, chlorine, bromine, cyano, nitro, sulfonyl, acyl, alkoxycarbonyl, alkoxy, perfluoroalkoxy, hydroxyl, amino, alkoxycarbonyl, carbamoyl, aminocarbonyl, N-alkylaminocarbonyl or N, N-dialkylaminocarbonyl;

R₄is hydrogen, acyl or alkyl or aralkyl containing 1 to 20 carbon atoms.

The above-mentioned sulfonamide compound is preferably diphenylsulfonimide and/or N- (methylsulfonyl) -p-tolylsulfonamide, and more preferably diphenylsulfonimide.

Preferably, the ammonia or amine blocked sulfonic acid compound is a salt formed by reacting ammonia or an amine with a sulfonic acid.

The amine is preferably methylamine, dimethylamine, trimethylamine, ethylamine, propylamine, dipropylamine, butylamine, triethylamine, dibutylamine, benzylamine, ethanolamine, dimethylethanolamine, N-diethylethanolamine and/or diisopropanolamine, and is preferably diethylamine and/or N, N-diethylethanolamine.

The sulfonic acid is selected from one or more of p-toluenesulfonic acid, o-nitrobenzenesulfonic acid, m-nitrobenzenesulfonic acid, p-nitrobenzenesulfonic acid, nitrobenzene-2, 4-disulfonic acid, 2-nitryl-tolyl-3-sulfonic acid, o-sulfobenzoic acid, sulfosalicylic acid, sulfophthalic acid, 2, 4-dinitrobenzenesulfonic acid, 3, 5-dinitrobenzenesulfonic acid, cyclamic acid and the like; preferably one or more of p-toluenesulfonic acid, o-nitrobenzenesulfonic acid, m-nitrobenzenesulfonic acid, p-nitrobenzenesulfonic acid, nitrobenzene-2, 4-disulfonic acid, o-sulfobenzoic acid, sulfosalicylic acid and cyclamic acid, and more preferably p-toluenesulfonic acid and/or cyclamic acid.

Preferably, the powder coating catalyst composition is a mixture of a sulfonamide compound and a tertiary amine compound to provide a water ripple effect; preferably, the weight percentage of the two is 55-70: 30-45.

Preferably, the powder coating catalyst composition, when providing a moire effect, is a mixture of ammonia or an amine blocked sulphonic acid compound and a tertiary amine compound; preferably, the weight percentage of the two is 60-75: 25-40.

The invention also provides a TMMGU system powder coating with a texture effect, which comprises the following raw materials: 59-69% of hydroxyl resin, 3-5% of amino resin, 0.6-1% of the powder coating catalyst composition, 23-32% of pigment and filler and 2-3% of an auxiliary agent.

Preferably, the hydroxyl resin is a polyester resin containing hydroxyl functionality and/or a polyacrylic resin containing hydroxyl functionality; the amino resin is glycoluril type amino resin.

In the present invention, the hydroxyl resin is a polyester resin containing hydroxyl functionality and/or a poly (meth) acrylic resin containing hydroxyl functionality. These resins can be chemically crosslinked with glycoluril-type amino resin crosslinkers in the presence of a catalyst, as follows:

preferably, the number average molecular weight of the polyester resin containing hydroxyl functionality is 1000-.

Preferably, to ensure effective chemical crosslinking, the functionality of the polyester resin containing hydroxyl functionality is greater than 2, preferably from 2.2 to 3.5. It is generally believed that a high functionality will facilitate adequate texture formation, while a low functionality is more prone to forming a smooth glossy surface, and thus resins with high functionality are preferred for the present invention.

Preferably, the hydroxyl value of the polyester resin containing hydroxyl functionality is from 10 to 100mgKOH/g, preferably from 20 to 80mgKOH/g, more preferably from 25 to 50 mgKOH/g.

Preferably, the hydroxyl functionality containing polyester resin has a glass transition temperature Tg of from 40 to 80 deg.C, preferably from 45 to 65 deg.C, more preferably from 50 to 65 deg.C.

The above-mentioned polyester resins containing hydroxyl functionality are generally prepared by condensation of the corresponding polybasic acids and polyhydric alcohols. Examples of the polybasic acid include terephthalic acid, isophthalic acid, 1, 4-cyclohexyldicarboxylic acid, adipic acid, maleic acid, succinic acid, trimellitic acid, and the like; examples of the polyhydric alcohol include ethylene glycol, diethylene glycol, propylene glycol, hexylene glycol, neopentyl glycol, cyclohexyldimethyl alcohol, trimethylolpropane and the like.

In the present invention, the above-mentioned polyester resins containing hydroxyl functionality may be obtained by commercially available routes, such as: CC2920-0 from Cytec, USA, Uralac P1620 from DSM, EL-1000H for southern resins, YE-2080 for Guangdong silver resin, P550 from Polymer materials, Inc. of Star Yue, Guangdong, etc. Such polyester resins containing hydroxyl functionality are well known to those skilled in the art.

Also, poly (meth) acrylic resins may be used as film-forming resins, either alone or in combination with the above-described polyester resins containing hydroxyl functionality as part of the film-forming resin.

Chemically, the poly (meth) acrylic resin can be obtained by polymerization, and the production method thereof is not particularly limited as long as the requirements defined in the present invention are satisfied. Conventionally, commonly used copolymerization methods include bulk polymerization, radical solution polymerization, emulsion polymerization, suspension polymerization, and the like, with radical solution polymerization being preferred. Such techniques are well known to those skilled in the art.

According to the invention, the poly (meth) acrylic resin is hydroxyl-functional. Hydroxyl functionality can be introduced into the composition by selecting the following structural monomers:

wherein: r₆Is H or C₁-C₄Is preferably H or C₁-C₂More preferably methyl; r₇Is hydroxymethyl or hydroxyethyl, preferably hydroxymethyl.

These functional monomers may be added alone or in combination to the composition of the copolymer. According to the present invention, it is used in an amount of 1 to 60% by weight, preferably 5 to 50% by weight, more preferably 10 to 30% by weight, based on the total weight of the poly (meth) acrylic resin.

According to the present invention, the poly (meth) acrylic resin may further include (meth) acrylic esters, specifically, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, dodecyl (meth) acrylate, benzyl (meth) acrylate, and the like.

In addition, it is also possible to include other vinyl monomers in the comonomers of the present invention, such as styrene or methylstyrene. According to the invention, it is used in an amount of 10 to 70%, preferably 35 to 50%, based on the total weight of the poly (meth) acrylic resin.

An initiator is further added during the polymerization of the poly (meth) acrylic resin, and examples thereof include Azobisisobutyronitrile (AIBN), dibenzoyl peroxide (BPO), t-butyl hydroperoxide, and dicumyl peroxide, with BPO and dicumyl peroxide being preferred.

Preferably, the number average molecular weight of the hydroxyl functionality-containing poly (meth) acrylic resin is 1000-.

Preferably, the hydroxyl value of the poly (meth) acrylic resin containing hydroxyl functionality is from 10 to 100mgKOH/g, preferably from 20 to 80mgKOH/g, more preferably from 25 to 50 mgKOH/g.

Preferably, the poly (meth) acrylic resins containing hydroxyl functionality have a glass transition temperature Tg of from 30 to 110 ℃ and preferably from 45 to 70 ℃.

The amino resin is a glycoluril type amino resin, preferably tetramethoxymethyl glycoluril.

The above amino resins are readily available commercially, for example from Powderlink 1174 of Cytec, USA, AHA1209 of Hua' an import and export, Inc., Anhui, chemical structure as follows:

as is well known to those skilled in the art.

According to the invention, the weight ratio of amino resin cross-linking agent to hydroxyl resin is 4-20: 100, preferably 5 to 7: 100, depending mainly on the hydroxyl number of the resin.

In the present invention, pigments and fillers include, but are not limited to, silica, kaolin, red iron oxide, yellow iron oxide, chromium pigments, carbon black, titanium dioxide, phthalocyanine blue, phthalocyanine green, azo, anthraquinone, thioindigo, precipitated barium sulfate, and the like.

In the present invention, the construction method of the powder coating capable of providing texture effect is as follows: it can be adhered to a substrate (e.g., a metal substrate) by powder electrostatic gun, friction gun spray, fluidized bed dip coating, hot melt sintering, etc., and then cured by heating or radiation to form a coating film. The thickness of the coating film can be selected according to the requirement, and can be 50-400 μm, preferably 120-180 μm.

Has the advantages that: the invention provides a TMMGU system powder coating catalyst composition which can provide texture effect when added into a powder coating. Specifically, different texture effects can be obtained by selecting different sulfonic acid compounds in the composition and tertiary amine compounds, wherein the texture effect can be a new water ripple which is not reported in TMMGU system powder coatings; the texture may also be moir e and is different from the moir e powder coatings reported previously in that no epoxy compound is added. The powder coating containing the catalyst composition has clear and uniform surface texture, good continuity, obvious decorative effect and good reproducibility after being cured.

Drawings

FIG. 1 is a schematic diagram of a water ripple feature texture layout prepared according to an embodiment of the present invention;

FIG. 2 is a characteristic texture layout of moire patterns prepared by an embodiment of the present invention;

fig. 3 is a layout of characteristic textures of wrinkles prepared in comparative example 2 of the present invention.

Detailed Description

The technical solution of the present invention will be described in detail below with reference to specific examples.

Example 1

A powder coating capable of providing a water ripple effect comprises the following raw materials in parts by weight: 300 parts of hydroxyl resin YE-2080, 19 parts of amino resin AHA1209, 1.2 parts of triethylene diamine, 2 parts of catalyst AHA6329, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 75 parts of titanium dioxide and 25 parts of W44.

The preparation method comprises the following steps: placing the above materials in a plastic bag, manually mixing for 3-5min, adding into a twin-screw extruder (model: SLJ-30A, Nicotiana tabacum), melting, homogenizing, tabletting, cooling, grinding into fine powder, sieving with 120 mesh sieve, electrostatically spraying on a degreased cold-rolled steel plate, and solidifying at 200 deg.C for 15 min.

The test was then carried out according to the test methods described below, with the specific results shown in Table 2.

Example 2

A powder coating capable of providing a water ripple effect comprises the following raw materials in parts by weight: 300 parts of hydroxyl resin YE-2080, 19 parts of amino resin AHA1209, 1.2 parts of triethylene diamine, 2 parts of catalyst AHA6329, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 100 parts of titanium dioxide and 25 parts of W44.

The preparation method is the same as example 1.

Example 3

A powder coating capable of providing a water ripple effect comprises the following raw materials in parts by weight: 300 parts of hydroxyl resin YE-2080, 19 parts of amino resin AHA1209, 1.2 parts of triethylene diamine, 2 parts of catalyst AHA6329, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 100 parts of titanium dioxide, 25 parts of W44, 25 parts of SiO₂。

The preparation method is the same as example 1.

Example 4

A powder coating capable of providing a water ripple effect comprises the following raw materials in parts by weight: 300 parts of hydroxyl resin YE-2080, 19 parts of amino resin AHA1209, 1.2 parts of triethylene diamine, 2 parts of catalyst AHA6329, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 100 parts of titanium dioxide, 25 parts of W44, 10 parts of SiO₂。

The preparation method is the same as example 1.

Example 5

A powder coating capable of providing a water ripple effect comprises the following raw materials in parts by weight: 300 parts of hydroxyl resin YE-2080, 19 parts of amino resin AHA1209, 1.2 parts of triethylene diamine, 2 parts of catalyst AHA6329, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 100 parts of titanium dioxide, 25 parts of W44 and 20 parts of kaolin.

The preparation method is the same as example 1.

Example 6

A powder coating capable of providing a water ripple effect comprises the following raw materials in parts by weight: 300 parts of hydroxyl resin YE-2080, 19 parts of amino resin AHA1209, 1.2 parts of triethylene diamine, 2 parts of catalyst AHA6329, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 100 parts of titanium dioxide, 25 parts of W44 and 30 parts of kaolin.

The preparation method is the same as example 1.

Example 7

A powder coating capable of providing a water ripple effect comprises the following raw materials in parts by weight: 300 parts of hydroxy resin UC9008, 19 parts of amino resin AHA1209, 1.2 parts of triethylene diamine, 2 parts of catalyst AHA6329, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 100 parts of titanium dioxide and 25 parts of W44.

The preparation method is the same as example 1.

Example 8

A powder coating capable of providing a water ripple effect comprises the following raw materials in parts by weight: 300 parts of hydroxy resin UC9008, 19 parts of amino resin AHA1209, 1.2 parts of triethylene diamine, 2 parts of catalyst AHA6329, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 100 parts of titanium dioxide, 25 parts of W44, 20 parts of SiO₂。

The preparation method is the same as example 1.

Example 9

A powder coating capable of providing a water ripple effect comprises the following raw materials in parts by weight: 300 parts of hydroxyl resin YE-2080, 19 parts of amino resin AHA1209, 1.2 parts of triethylene diamine, 2 parts of catalyst AHA6329, 6 parts of flatting agent AHA1088P and 5 parts of AnIncense AHA4100, 100 parts of titanium dioxide, 25 parts of W44 and 20 parts of SiO₂0.1 part of phthalocyanine blue.

The preparation method is the same as example 1.

Example 10

A powder coating capable of providing a water ripple effect comprises the following raw materials in parts by weight: 300 parts of hydroxyl resin YE-2080, 19 parts of amino resin AHA1209, 1.5 parts of triethylene diamine, 2 parts of catalyst AHA6329, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 100 parts of titanium dioxide, 25 parts of W44, 20 parts of SiO₂。

The preparation method is the same as example 1.

Example 11

A powder coating capable of providing a water ripple effect comprises the following raw materials in parts by weight: 300 parts of hydroxyl resin YE-2080, 19 parts of amino resin AHA1209, 1 part of triethylene diamine, 2 parts of catalyst AHA6329, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 100 parts of titanium dioxide, 25 parts of W44, 20 parts of SiO₂。

The preparation method is the same as example 1.

Example 12

A powder coating capable of providing a moire effect comprises the following raw materials in parts by weight: 300 parts of hydroxyl resin YE-2080, 19 parts of amino resin AHA1209, 1.2 parts of triethylene diamine, 2 parts of catalyst AHA6319, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 100 parts of titanium dioxide and 25 parts of W44.

The preparation method is the same as example 1.

Example 13

A powder coating capable of providing a moire effect comprises the following raw materials in parts by weight: 300 parts of hydroxyl resin YE-2080, 19 parts of amino resin AHA1209, 1.2 parts of triethylene diamine, 3 parts of catalyst AHA6319, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 100 parts of titanium dioxide and 25 parts of W44.

The preparation method is the same as example 1.

Comparative example 1

The powder coating comprises the following raw materials in parts by weight: 300 parts of hydroxyl resin YE-2080, 19 parts of amino resin AHA1209, 2 parts of catalyst AHA6329, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 100 parts of titanium dioxide and 75 parts of W44.

The preparation method is the same as example 1.

Comparative example 2

The powder coating comprises the following raw materials in parts by weight: 300 parts of hydroxyl resin YE-2080, 19 parts of amino resin AHA1209, 2 parts of catalyst AHA6319, 6 parts of flatting agent AHA1088P, 5 parts of benzoin AHA4100, 100 parts of titanium dioxide and 75 parts of W44.

The preparation method is the same as example 1.

The powder coatings prepared in examples 1 to 13 according to the invention and comparative examples 1 to 2 were tested for their properties.

Test item and method

1. Texture

Expressed by visual observation.

2. Thickness of coating film

Measured directly with a magnetic thickness meter (thickness meter Q Nix4500 from Automation dr. Nix GmbH, germany).

3. Gloss of

The reflectance was measured directly at 60 ℃ according to GB/T1743-89 using Micro-gloss 60 ℃ 4442 from BYK, Germany.

Secondly, the raw material source

The suppliers of the respective raw materials in examples 1 to 13 and comparative examples 1 to 2 are shown in table 1:

TABLE 1 suppliers of the respective raw materials in examples 1 to 13 and comparative examples 1 to 2

Thirdly, detecting results:

TABLE 2 results of performance test of powders prepared in examples 1 to 13 and comparative examples 1 to 2

Item	Texture	Gloss, 60 °	Film thickness, μm
				Standard of merit		GB/T 1743	GB/T 4957
Example 1	Water wave	32	120-130
				Example 2	Water wave	16.3	130-150
Example 3	Water wave	40.4	160-180
				Example 4	Water wave	19.5	130-170
Example 5	Water wave	16.8	120-160
				Example 6	Water wave	17.9	160-180
Example 7	Water wave	20.9	150-170
				Example 8	Water wave	20.9	130-170
Example 9	Water wave	11.6	110-120
				Example 10	Water wave	7.2	150-170
Example 11	Water wave	37.3	120-140
				Example 12	Moire pattern	3.6	120-130
Example 13	Moire pattern	2.4	130-150
				Comparative example 1	Grade 5	85.6	130-150
Comparative example 2	Wrinkle (wrinkle)	2.6	130-150

As can be seen from Table 2, the water ripple textures obtained in the examples 1 to 11 of the present invention are clear and uniform, have good continuity, remarkable decoration effect and good reproducibility, and the characteristic texture layout thereof is shown in FIG. 1. The moire patterns obtained in the embodiments 12 to 13 of the invention are clear and uniform, have good continuity, obvious decoration effect and good reproducibility, and the characteristic texture pattern is shown in figure 2. Comparative example 1 used AHA6329 catalyst alone to give a 5-grade flat high gloss coating and comparative example 2 used AHA6319 catalyst alone to give a creped coating with a characteristic textured finish as shown in figure 3.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A TMMGU system powder coating catalyst composition providing a textural effect comprising a tertiary amine compound and a sulfonic acid compound; the tertiary amine compound has a structural formula shown as a formula (I):

the compound is shown in a formula (I),

wherein R is₁Is H or

；R₂Is a C1-4 straight chain or branched chain alkyl, and n is an integer of 0-6.

2. The TMMGU system powder coating catalyst composition that provides a texture effect of claim 1, wherein the sulfonic acid based compound is one of a sulfonamide based compound, an ammonia or an amine blocked sulfonic acid based compound.

3. The TMMGU system powder coating catalyst composition providing texture effect of claim 2, wherein the sulfoximine based compound has a formula as shown in formula (ii):

the compound of the formula (II),

wherein R is₃Is straight-chain alkyl, branched-chain alkyl, cycloalkyl, fluoroalkyl, N-dialkylamino consisting of 1-20 carbon atoms, aryl or aromatic heterocycle of 1-20 carbon atoms and a substitute thereof; the substituent is a mono-substituted, di-substituted, tri-substituted, tetra-substituted or penta-substituted compound, and the substituent is hydrogen, fluorine, alkyl, fluoroalkyl, aryl, haloaryl, carboxyl, sulfydryl, vinyl, chlorine, bromine, cyano, nitro, sulfonyl, acyl, alkoxy, perfluoroalkoxy, hydroxyl, amino, alkoxycarbonyl, carbamoyl, aminocarbonyl, N-alkylaminocarbonyl or N, N-dialkylaminocarbonyl;

R₄is hydrogen, acyl or alkyl or aralkyl containing 1 to 20 carbon atoms.

4. The TMMGU system powder coating catalyst composition providing a texture effect of claim 2, wherein the ammonia or amine blocked sulfonic acid based compound is a salt formed by reacting ammonia or an amine with a sulfonic acid.

5. The TMMGU system powder coating catalyst composition that can provide a texture effect of claim 2 or 3, wherein the powder coating catalyst composition is a mixture of a sulfoximine-based compound and a tertiary amine-based compound when providing a moire texture effect; the weight percentage of the two is 55-70: 30-45.

6. The TMMGU system powder coating catalyst composition that provides texture effect as claimed in claim 2 or 3, wherein the powder coating catalyst composition is a mixture of ammonia or amine blocked sulfonic acid based compound and tertiary amine based compound when providing moire texture effect; the weight percentage of the two is 60-75: 25-40.

7. The TMMGU system powder coating with the texture effect is characterized by comprising the following raw materials: 59-69% of hydroxyl resin, 3-5% of amino resin, 0.6-1% of the powder coating catalyst composition as defined in any one of claims 1-6, 23-32% of pigment and filler and 2-3% of auxiliary agent.

8. The TMMGU system powder coating with texture effect of claim 7, wherein the hydroxyl resin is a polyester resin containing hydroxyl functionality and/or a polyacrylic resin containing hydroxyl functionality; the amino resin is glycoluril type amino resin.