An indoor all-purpose matt resin, a preparation method thereof and a powder coating

Abstract

The application discloses an indoor all-purpose extinction resin, which comprises the following raw materials in parts by weight: 55-65 parts of polybasic acid, 30-40 parts of polyhydric alcohol, 0.5-1.5 parts of a branching agent, 0.1-0.3 parts of an esterification catalyst, 0.1-0.3 parts of a thermal stabilizer and 4-8 parts of an acidolysis agent; the polybasic acid comprises at least two or more organic acids, two or more polybasic acids are used to end the resin molecular chain, namely, different active carboxyl groups are introduced, the reaction activity of the polybasic acids is different due to the different types of the polybasic acids, and the adaptability of the prepared resin to different extinction agents is improved; the extinction effect difference of the prepared resin mixed with a physical extinction agent, a chemical extinction agent or a physical-chemical mixed extinction agent is small, the adaptability is high, the downstream powder factory needs to test and compare the matching degree of the resin and different extinction agents, and the indoor all-purpose extinction resin has great market competitiveness; and the application further discloses a preparation method of the indoor all-purpose extinction resin and a powder coating comprising the indoor all-purpose extinction resin.

Description

Technical Field

[0001] This invention belongs to the field of resin coating technology, specifically relating to an indoor all-purpose matte resin and its preparation method, as well as powder coatings. Background Technology

[0002] Paint matting agents are substances that can significantly reduce the gloss of a paint surface. Paint matting agents are generally classified into physical matting agents and chemical matting agents according to their matting principle.

[0003] Physical matting refers to the process of creating microscopic unevenness on the surface of a paint film through physical processes, resulting in a matte finish. Commonly used physical matting agents include various wax products, organic zinc salt compounds with matting and promoting effects, and matting fillers. The advantage of physical matting is its generally lower cost, while its disadvantages include limited matting degree, poor matting reproducibility, unstable gloss, and significant influence from extrusion processes.

[0004] In addition, a type of matting agent product has emerged that consumes an equal amount of polyester resin and its curing agent. It is generally classified as a physical matting agent (in fact, this also belongs to chemical matting agents, but it is classified as a physical matting agent due to usage habits).

[0005] Chemical matting agents generally refer to salts formed by 2-phenylimidazoline and polycarboxylic acids (or acid anhydrides), which are familiar matting curing agents. The matting principle is that the curing time of each reactant in the system is different, which causes uneven shrinkage of the coating film, resulting in a slightly rough surface and diffuse reflection of light, thus achieving a matting effect. The greater the difference in curing time, the better the matting effect.

[0006] Different matting agents, due to their different matting principles or component designs, can result in significant differences in matting effect when the same resin is used with different matting agents. For example, the same resin may have a gloss of 8% when used with matting agent A, but the gloss may become 50% when used with matting agent B.

[0007] The applicant has long been committed to the research and development and improvement of coatings. Its downstream powder manufacturers have reported that they often need to repeatedly test the compatibility between matting agents and resins. The inventor believes that the reason is that the composition of matting agents of different types and manufacturers is very different, which leads to a large difference in the matting effect formed after the resin is mixed with them. Summary of the Invention

[0008] To address the problems in related technologies, this invention proposes an indoor all-purpose matting resin that is compatible with different matting agents, thereby solving the problem of significant differences in matting effect of the same resin when facing different matting agents. This invention also relates to a method for preparing the indoor all-purpose matting resin and a powder coating containing the indoor all-purpose matting resin, in order to overcome the aforementioned technical problems existing in the prior art.

[0009] The technical solution of this invention is implemented as follows:

[0010] An indoor all-purpose matting resin comprises the following raw materials in parts by weight:

[0011] 55-65 parts of polyacid, 30-40 parts of polyol, 0.5-1.5 parts of branching agent, 0.1-0.3 parts of esterification catalyst, 0.1-0.3 parts of heat stabilizer and 4-8 parts of acid hydrolysis agent;

[0012] The polyacid contains at least two or more organic acids.

[0013] This invention uses two or more polybasic acids to cap the resin molecular chain, introducing carboxyl groups with different activities. Due to the different types of polybasic acids used, their reactivity also varies, thereby improving the adaptability of the obtained resin to different matting agents. The resin obtained by this invention has a small difference in matting effect when mixed with physical matting agents, chemical matting agents, or physical-chemical mixed matting agents, and has high compatibility. This avoids the need for downstream powder manufacturers to test and compare the compatibility of the resin with different matting agents, giving it greater market competitiveness.

[0014] Preferably, it further includes 0.1-0.3 parts of triphenylphosphine, 0.2-0.6 parts of N,N-dimethyloctadecylamine and 0.1-0.3 parts of benzyltriethylammonium chloride.

[0015] Further design incorporates various catalysts. Due to the different types of catalysts, their catalytic effects on the indoor all-purpose resin and epoxy resin, the indoor all-purpose resin and matting agent, and the epoxy resin and matting agent in the subsequent coating reaction system are different. This improves the adaptability of the resin of the present invention to different matting agents, while making the curing speed of each reaction component in the coating system different, forming a low-gloss or matte film.

[0016] Preferably, the polybasic acid comprises 50-60 parts terephthalic acid, 0.5-1.5 parts isophthalic acid, and 0.5-1.5 parts adipic acid;

[0017] The polyol comprises 8-10 parts ethylene glycol, 11-15 parts diethylene glycol, and 11-15 parts neopentyl glycol.

[0018] This invention involves the specific selection and proportional design of polyols and polyacids, thereby effectively controlling the molecular weight of the resin and the end-group structure of the resin molecular chain.

[0019] Preferably, the branching agent is trimethylolpropane; the esterification catalyst is monobutyltin oxide; the heat stabilizer is triphenyl phosphite; and the acid hydrolysate is trimellitic anhydride, which can improve the end-group reactivity of the resin molecular chain.

[0020] The preparation method of the above-mentioned indoor all-purpose matting resin includes the following steps:

[0021] (1) Add the pre-set weight proportions of polyol, branching agent, esterification catalyst and some polyacid to the reaction vessel, introduce protective gas, heat to 180±10℃ to start the esterification reaction, continue to gradually heat to 240±5℃, and keep warm until the solution in the reaction vessel becomes clear.

[0022] (2) Cool down to 222±3℃, add the remaining polybasic acid to the reactor, and then heat up to 240±5℃ and keep warm until the solution in the reactor becomes clear.

[0023] (3) Cool down to 222±3℃, add the preset weight of heat stabilizer to the reactor, and then evacuate until the acid value is 8-11mgKOH / g and the viscosity at 200℃ is 4000-4500mPa.s, which is qualified. Stir evenly.

[0024] (4) Further cool down to 200-205℃, add the preset weight of acid hydrolysate to the reactor, and stir for at least 1 hour.

[0025] During the reaction, polyols inevitably lose some due to the intense exothermic reaction of esterification. This invention reduces the sublimation loss of polyols and controls the esterification rate by using a solvent-free melt esterification process and precise temperature control, thereby ensuring that a clear and transparent resin can be obtained.

[0026] Preferably, the material obtained in step (4) is cooled to 190-195°C, and a predetermined amount of triphenylphosphine, N,N-dimethyloctadecylamine and benzyltriethylammonium chloride are added to the reactor and stirred for at least 0.5 hours.

[0027] The above preparation method specifically includes the following steps:

[0028] (1) Add ethylene glycol, diethylene glycol, neopentyl glycol, trimethylolpropane, terephthalic acid and monobutyltin oxide in a pre-defined weight ratio to a reactor equipped with a heating device, stirrer and condenser, and introduce nitrogen gas with a purity of 99.9% and heat to 180±10℃ to generate esterified water and distill it out. The distillate is a colorless and transparent liquid.

[0029] Then gradually raise the temperature to 240±5℃ and keep it at that temperature until the solution in the reactor becomes clear, the acid value reaches 14-17 mgKOH / g and the viscosity at 200℃ is 600-900 mPa.s, which is considered qualified;

[0030] (2) Cool down to 222±3℃, add the preset weight parts of isophthalic acid and adipic acid, then heat up to 240±5℃, and keep warm until the solution in the reactor becomes clear, the acid value reaches 20-24mgKOH / g and the viscosity at 200℃ is 700-1100mPa.s, which is qualified;

[0031] (3) Cool down to 222±3℃, add the preset weight parts of triphenyl phosphite, and then evacuate until the acid value is 8-11mgKOH / g and the viscosity at 200℃ is 4000-4500mPa.s, which is qualified;

[0032] (4) Cool down to 200-205℃, add the preset weight parts of trimellitic anhydride, stir for at least 1 hour, and test the acid value to be 50-55 mgKOH / g and the viscosity at 200℃ to be 5000-6000 mPa.s, which is qualified;

[0033] (5) Cool down to 190-195℃, add the preset weight parts of triphenylphosphine, N,N-dimethyloctadecylamine and benzyltriethylammonium chloride, keep warm and stir for at least 0.5 hours, and discharge the material to obtain the indoor all-purpose matting resin.

[0034] This invention synthesizes a high-quality, versatile indoor matting resin suitable for various matting agents by designing specific components and proportions. However, the resin's performance is also closely related to the preparation process. Therefore, this invention ensures the resin's performance by controlling the order of addition of reactants and the parameters of the reaction process. Among the various polybasic acids used in this invention, isophthalic acid and adipic acid have higher reactivity than terephthalic acid. If all three are added together, isophthalic acid and adipic acid will attach to the resin molecular chain before terephthalic acid, which is the main ingredient, leading to an imbalance in the resin molecular chain and adversely affecting the resin's performance. Therefore, this invention designs the addition of isophthalic acid and adipic acid later to control the structure of the resin molecular chain.

[0035] The present invention also discloses a powder coating comprising the above-mentioned indoor all-purpose matte resin.

[0036] The powder coating described above specifically comprises the following raw materials in parts by weight:

[0037] 300-400 parts of the above-mentioned indoor all-purpose matting resin, 200-300 parts of epoxy resin, 20-30 parts of matting agent, 5-15 parts of brightening agent, 5-15 parts of leveling agent, 1-5 parts of benzoin, 1-5 parts of wax powder, 150-250 parts of titanium dioxide and 100-200 parts of barium sulfate.

[0038] This invention incorporates a combination of various catalysts into the resin. Due to the different types of catalysts, their catalytic effects on the all-purpose resin and epoxy resin, the all-purpose resin and matting agent, and the epoxy resin and matting agent in the reaction system are different, thereby improving the resin's adaptability to matting agents.

[0039] The powder coating forms a film with a gloss level of 5-15% at 60°, providing a soft and non-glaring visual effect. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] Unless otherwise specified, the materials used in the following examples and comparative examples are all commercially available conventional materials.

[0042] Example 1

[0043] This embodiment specifically includes the following components and preparation steps:

[0044] (1) Add 9.0 kg of ethylene glycol, 12.2 kg of diethylene glycol, 12.8 kg of neopentyl glycol, 0.7 kg of trimethylolpropane, 56.8 kg of terephthalic acid and 0.1 kg of monobutyltin oxide to a reactor equipped with a heating device, a stirrer and a condenser, and introduce nitrogen gas with a purity of 99.9%. Heat to 180±10℃ and esterification water begins to be generated and distilled out. The distillate is a colorless and transparent liquid.

[0045] Then gradually raise the temperature to 240±5℃ and keep it at that temperature until the solution in the reactor becomes clear. Take a sample and measure it. If the acid value reaches 14-17 mgKOH / g and the viscosity at 200℃ is 600-900 mPa.s, then it is qualified.

[0046] (2) Cool down to 222±3℃, add 1kg isophthalic acid and 0.5kg adipic acid, then heat up to 240±5℃ and keep warm until the solution in the reactor becomes clear. Take a sample and test it. If the acid value reaches 20-24mgKOH / g and the viscosity at 200℃ is 700-1100mPa.s, then it is qualified.

[0047] (3) Cool down to 222±3℃, add 0.1kg of triphenyl phosphite, and then evacuate until the acid value is 8-11mgKOH / g and the viscosity at 200℃ is 4000-4500mPa.s, then it is qualified;

[0048] (4) Cool down to 200-205℃, add 6.0kg trimellitic anhydride, stir for 1 hour, take a sample for testing, and if the acid value is 50-55mgKOH / g and the viscosity at 200℃ is 5000-6000mPa.s, it is qualified. The material is then discharged to obtain the present embodiment.

[0049] Example 2

[0050] This embodiment specifically includes the following components and preparation steps:

[0051] (1) Add 8.0 kg of ethylene glycol, 11.5 kg of diethylene glycol, 11.8 kg of neopentyl glycol, 0.5 kg of trimethylolpropane, 51.3 kg of terephthalic acid and 0.1 kg of monobutyltin oxide to a reactor equipped with a heating device, a stirrer and a condenser, and introduce nitrogen gas with a purity of 99.9%. Heat to 180±10℃ and esterification water begins to be generated and distilled out. The distillate is a colorless and transparent liquid.

[0052] Then gradually raise the temperature to 240±5℃ and keep it at that temperature until the solution in the reactor becomes clear. Take a sample and measure it. If the acid value reaches 14-17 mgKOH / g and the viscosity at 200℃ is 600-900 mPa.s, then it is qualified.

[0053] (2) Cool down to 222±3℃, add 0.5kg isophthalic acid and 0.5kg adipic acid, then heat up to 240±5℃ and keep warm until the solution in the reactor becomes clear. Take a sample and test it. If the acid value reaches 20-24mgKOH / g and the viscosity at 200℃ is 700-1100mPa.s, then it is qualified.

[0054] (3) Cool down to 222±3℃, add 0.1kg of triphenyl phosphite, and then evacuate until the acid value is 8-11mgKOH / g and the viscosity at 200℃ is 4000-4500mPa.s, then it is qualified;

[0055] (4) Cool down to 200-205℃, add 4.0kg trimellitic anhydride, stir for 1 hour, take a sample for testing, and if the acid value is 50-55mgKOH / g and the viscosity at 200℃ is 5000-6000mPa.s, it is qualified;

[0056] (5) Cool down to 190-195℃, add 0.1kg triphenylphosphine, 0.2kg N,N-dimethyloctadecylamine and 0.1kg benzyltriethylammonium chloride, keep warm and stir for 0.5 hours, and discharge the material to obtain the present example.

[0057] Example 3

[0058] This embodiment specifically includes the following components and preparation steps:

[0059] (1) Add 9.0 kg of ethylene glycol, 12.2 kg of diethylene glycol, 12.8 kg of neopentyl glycol, 0.7 kg of trimethylolpropane, 56.8 kg of terephthalic acid and 0.1 kg of monobutyltin oxide to a reactor equipped with a heating device, a stirrer and a condenser, and introduce nitrogen gas with a purity of 99.9%. Heat to 180±10℃ and esterification water begins to be generated and distilled out. The distillate is a colorless and transparent liquid.

[0060] Then gradually raise the temperature to 240±5℃ and keep it at that temperature until the solution in the reactor becomes clear. Take a sample and measure it. If the acid value reaches 14-17 mgKOH / g and the viscosity at 200℃ is 600-900 mPa.s, then it is qualified.

[0061] (2) Cool down to 222±3℃, add 1kg isophthalic acid and 0.5kg adipic acid, then heat up to 240±5℃ and keep warm until the solution in the reactor becomes clear. Take a sample and test it. If the acid value reaches 20-24mgKOH / g and the viscosity at 200℃ is 700-1100mPa.s, then it is qualified.

[0062] (3) Cool down to 222±3℃, add 0.1kg of triphenyl phosphite, and then evacuate until the acid value is 8-11mgKOH / g and the viscosity at 200℃ is 4000-4500mPa.s, then it is qualified;

[0063] (4) Cool down to 200-205℃, add 6.0kg trimellitic anhydride, stir for 1 hour, take a sample for testing, and if the acid value is 50-55mgKOH / g and the viscosity at 200℃ is 5000-6000mPa.s, it is qualified;

[0064] (5) Cool down to 190-195℃, add 0.2kg triphenylphosphine, 0.4kg N,N-dimethyloctadecylamine and 0.2kg benzyltriethylammonium chloride, keep warm and stir for 0.5 hours, and discharge the material to obtain indoor all-purpose matting resin.

[0065] Example 4

[0066] This embodiment specifically includes the following components and preparation steps:

[0067] (1) Add 10.0 kg of ethylene glycol, 14.5 kg of diethylene glycol, 14.8 kg of neopentyl glycol, 1.5 kg of trimethylolpropane, 58.7 kg of terephthalic acid and 0.1 kg of monobutyltin oxide to a reactor equipped with a heating device, a stirrer and a condenser, and introduce nitrogen gas with a purity of 99.9%. Heat to 180±10℃ and esterification water begins to be generated and distilled out. The distillate is a colorless and transparent liquid.

[0068] Then gradually raise the temperature to 240±5℃ and keep it at that temperature until the solution in the reactor becomes clear. Take a sample and measure it. If the acid value reaches 14-17 mgKOH / g and the viscosity at 200℃ is 600-900 mPa.s, then it is qualified.

[0069] (2) Cool down to 222±3℃, add 1.5kg isophthalic acid and 1.5kg adipic acid, then heat up to 240±5℃ and keep warm until the solution in the reactor becomes clear. Take a sample and test it. If the acid value reaches 20-24mgKOH / g and the viscosity at 200℃ is 700-1100mPa.s, then it is qualified.

[0070] (3) Cool down to 222±3℃, add 0.3kg of triphenyl phosphite, and then evacuate until the acid value is 8-11mgKOH / g and the viscosity at 200℃ is 4000-4500mPa.s, then it is qualified;

[0071] (4) Cool down to 200-205℃, add 8.0kg trimellitic anhydride, stir for 1 hour, take a sample for testing, and if the acid value is 50-55mgKOH / g and the viscosity at 200℃ is 5000-6000mPa.s, it is qualified;

[0072] (5) Cool down to 190-195℃, add 0.3kg triphenylphosphine, 0.6kg N,N-dimethyloctadecylamine and 0.3kg benzyltriethylammonium chloride, keep warm and stir for 0.5 hours, and discharge to obtain indoor all-purpose matting resin.

[0073] The raw materials (weight unit: g) for the preparation of Examples 5 to 16 and Comparative Examples 1 to 5 are shown in the table below.

[0074] The matting agent A is a physical matting agent, specifically the ER103 model product manufactured by Wuhan Shuopeng New Materials Co., Ltd.

[0075] The matting agent B is a matting agent that consumes equal amounts of polyester resin and epoxy resin, specifically the ER100 model product produced by Wuhan Shuopeng New Materials Co., Ltd.

[0076] The matting agent C is a chemical matting agent, specifically the ER130D model product manufactured by Wuhan Shuopeng New Materials Co., Ltd.

[0077]

[0078]

[0079] The powder coatings prepared in Examples 5 to 16 and Comparative Examples 1 to 5 were sprayed onto tinplate in equal amounts. After heating and curing, the coating parameters were measured, referring to GB / T1732-2020 "Impact Test of Paint Film", HG / T "2006-2006 Thermosetting Powder Coatings", GB / T 9754-2007 "Determination of 20°, 60° and 85° Specular Gloss of Paint Films without Metallic Pigments" and GB / T 16995-1997 "Determination of Gelation Time of Thermosetting Powder Coatings at a Given Temperature".

[0080] The results are shown in the table below:

[0081]

[0082]

[0083] From the above data on 60% gloss, it is clear that the resin prepared by this invention, when mixed with different matting agents, results in a more gradual change in the gloss of the coating film. That is, the resin prepared by this invention produces a coating film with less difference in gloss when facing different types of matting agents, and the coating film has excellent performance; while commercially available matting resins, when mixed with different matting agents, exhibit a large range of gloss fluctuations in the coating film.

[0084] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A method for preparing an indoor all-purpose matting resin, characterized in that, Includes the following steps: (1) Add the pre-set weight parts of polyol, branching agent, esterification catalyst and some polyacid to the reaction vessel, introduce protective gas, heat to 180±10℃ to start the esterification reaction, continue to gradually heat to 240±5℃, keep warm until the solution in the reaction vessel becomes clear, wherein the polyacid is terephthalic acid. (2) Cool down to 222±3℃, add the remaining polybasic acid to the reactor, and then heat up to 240±5℃ and keep warm until the solution in the reactor becomes clear. The polybasic acid is isophthalic acid and adipic acid. (3) Cool down to 222±3℃, add the preset weight of heat stabilizer to the reactor, and then evacuate until the acid value is 8-11mgKOH / g and the viscosity at 200℃ is 4000-4500mPa.s, which is qualified. Stir evenly. (4) Further cool down to 200-205℃, add the predetermined amount of acid hydrolysate to the reactor, and stir for at least 1 hour; (5) Cool down to 190-195℃, add the pre-prepared weight proportions of triphenylphosphine, N,N-dimethyloctadecylamine and benzyltriethylammonium chloride, keep warm and stir for at least 0.5 hours, and then discharge; The indoor all-purpose matting resin comprises the following raw materials in parts by weight: 55-65 parts of polyacid, 30-40 parts of polyol, 0.5-1.5 parts of branching agent, 0.1-0.3 parts of esterification catalyst, 0.1-0.3 parts of heat stabilizer and 4-8 parts of acid hydrolysis agent; The polyacid contains at least two or more organic acids; The polyacid comprises 50-60 parts terephthalic acid, 0.5-1.5 parts isophthalic acid, and 0.5-1.5 parts adipic acid; The polyol comprises 8-10 parts of ethylene glycol, 11-15 parts of diethylene glycol and 11-15 parts of neopentyl glycol; It also includes 0.1-0.3 parts of triphenylphosphine, 0.2-0.6 parts of N,N-dimethyloctadecylamine and 0.1-0.3 parts of benzyltriethylammonium chloride.

2. The preparation method according to claim 1, characterized in that, The branching agent is trimethylolpropane; the esterification catalyst is monobutyltin oxide; the heat stabilizer is triphenyl phosphite; and the acid hydrolysate is trimellitic anhydride.

3. The preparation method according to claim 1, characterized in that, Includes the following steps: (1) Add ethylene glycol, diethylene glycol, neopentyl glycol, trimethylolpropane, terephthalic acid and monobutyltin oxide in a pre-defined weight ratio to a reactor equipped with a heating device, stirrer and condenser, and introduce nitrogen gas with a purity of 99.9% and heat to 180±10℃ to generate and distill water. The distillate is a colorless and transparent liquid. Then gradually raise the temperature to 240±5℃ and keep it at that temperature until the solution in the reactor becomes clear, the acid value reaches 14-17 mgKOH / g and the viscosity at 200℃ is 600-900 mPa.s, which is considered qualified; (2) Cool down to 222±3℃, add the preset weight parts of isophthalic acid and adipic acid, then heat up to 240±5℃, keep warm until the solution in the reactor becomes clear, the acid value reaches 20-24mgKOH / g and the viscosity at 200℃ is 700-1100mPa.s, which is qualified; (3) Cool down to 222±3℃, add the preset weight parts of triphenyl phosphite, and then evacuate until the acid value is 8-11mgKOH / g and the viscosity at 200℃ is 4000-4500mPa.s, which is qualified; (4) Cool down to 200-205℃, add the preset weight parts of trimellitic anhydride, stir for at least 1 hour, and test the acid value to be 50-55 mg KOH / g and the viscosity at 200℃ to be 5000-6000 mPa.s, which is qualified; (5) Cool down to 190-195℃, add the preset weight parts of triphenylphosphine, N,N-dimethyloctadecylamine and benzyltriethylammonium chloride, keep warm and stir for at least 0.5 hours, and discharge the material to obtain the indoor all-purpose matting resin.

4. A powder coating, characterized in that, The product comprises an indoor all-purpose matting resin prepared by the preparation method according to any one of claims 1 to 3.

5. The powder coating according to claim 4, characterized in that, The preparation materials comprise the following parts by weight: 300-400 parts of indoor all-purpose matting resin, 200-300 parts of epoxy resin, 5-15 parts of leveling agent, 5-15 parts of glossing agent, 1-5 parts of benzoin, 1-5 parts of wax powder, 150-250 parts of titanium dioxide, 100-200 parts of barium sulfate, and 20-30 parts of matting agent.

6. The powder coating according to claim 5, characterized in that, The powder coating film has a gloss level of 5-15% at 60°.

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