A voc abatement composition and method of making and using the same

Abstract

This invention discloses a VOC-reducing composition, its preparation method, and its application, belonging to the field of polymer materials technology. The VOC-reducing composition comprises the following components in parts by weight: 28-82 parts of a first polypropylene resin, 19-62 parts of an amine compound, and 0.4-5.2 parts of a lubricant; the amine compound includes at least one of hydrogenated palmityl amine and dihydrogenated tallow amine, and the lubricant is at least one of fatty acid ester lubricant and fatty acid amide lubricant. This invention, through the compounding of a first polypropylene resin, a specific lubricant, and a specific amine compound, results in a composition with good activity, which can reduce aldehyde VOCs during processing (such as extrusion granulation or injection molding), making the resulting composition suitable for preparing automotive interior parts.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, specifically to a VOC reduction composition, its preparation method, and its application. Background Technology

[0002] In recent years, various pollution incidents involving car interiors have occurred frequently, leading to increasingly strong consumer demands for health-related aspects of in-car environments. In-car air pollution has become the third largest indoor environmental pollution problem threatening human health, following pollution from interior decoration and furniture in China, and PM2.5 pollution in indoor environments. Generally speaking, in-car air quality problems are mainly caused by toxic substances released from automotive interior materials, emitting unpleasant odors. This is directly related to vehicle manufacturing processes and components, with significant impacts on dashboard assemblies, door panels, carpets, headliners, wiring harnesses, and seat assemblies. The base materials for these components are mostly modified polypropylene injection molded. Even with corresponding emission controls implemented at the upstream stage, the modified polypropylene material undergoes further oxidation or chain-breaking reactions during the parts manufacturing process due to high-temperature shearing, producing new aldehyde-like environmental substances, leading to excessive VOCs, especially aldehydes, in parts and even the entire vehicle.

[0003] The invention patent with publication number CN103739955A discloses a low-odor, highly dispersed color masterbatch and its preparation method. It uses low molecular weight polypropylene as the base material color masterbatch as a deodorizing agent, which can effectively remove various volatile small molecules and organic compounds generated during processing, so that the prepared composition has low odor and low emission characteristics, which can meet the requirements of automotive interior parts; however, it cannot avoid the VOC problem caused by the volatilization of toxic substances released during the secondary injection molding process due to high temperature and high shear. Summary of the Invention

[0004] In view of the deficiencies of the existing technology, the purpose of this invention is to provide a VOC reduction composition, its preparation method and application.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a VOC reduction composition comprising the following components in parts by weight: 28-82 parts of a first polypropylene resin, 19-62 parts of an amine compound, and 0.4-5.2 parts of a lubricant; wherein the amine compound comprises at least one of hydrogenated palmityl amine and dihydrogenated tallow amine, and the lubricant comprises at least one of fatty acid ester lubricant and fatty acid amide lubricant.

[0006] The present invention combines a first polypropylene resin, a specific lubricant and a specific amine compound to obtain a composition with good activity. This composition can reduce aldehyde VOCs during processing (such as extrusion granulation or injection molding), making the composition suitable for the preparation of automotive interior parts.

[0007] The inventors discovered that amine compounds containing active hydrogen can react with aldehyde compounds. The reaction principle is as follows: the lone pair electrons of the nitrogen atom in the amine compound attack the carbonyl carbon (C=O) of the aldehyde, forming a zwitterionic intermediate (N is positively charged, O is negatively charged). The active hydrogen (NH) on the amino group is directly transferred to the negatively charged carbonyl oxygen, neutralizing the charge and generating a stable amino alcohol intermediate. After the -OH group of the amino alcohol is protonated, the remaining active hydrogen on the nitrogen atom participates in the elimination process again, driving the lone pair electrons of the nitrogen atom to form a C=N double bond, removing one molecule of water, and finally generating an imine (Schiff base). Introducing these amine compounds into the composition can give the composition excellent VOC reduction characteristics; moreover, hydrogenated palmityl amine, dihydrogenated tallow amine, etc., do not contain unsaturated bonds, are stable during the reaction, and will not generate new small molecules due to the oxidation of unsaturated bonds.

[0008] The inventors discovered through research that the introduction of lubricants not only provides good dispersion and lubrication, improving the dispersibility of amine compounds in the composition, but also, because lubricants such as fatty acid esters and fatty acid amides have hydrogen bonds with amine compounds and similar polarities, they have better compatibility. This can enhance the dispersion of amine compounds, further reduce the probability of aldehyde formation, and increase the probability of reaction between amines and aldehydes, thereby further improving the composition's ability to reduce aldehyde VOCs.

[0009] For example, in the VOC reduction composition, the weight parts of the first polypropylene resin can be any one or a combination of 28 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, and 80 parts; the weight parts of the amine compound can be any one or a combination of 19 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, and 62 parts; and the weight parts of the lubricant can be any one or a combination of 0.4 parts, 0.5 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, and 5.2 parts.

[0010] Preferably, in the VOC reduction composition, the mass percentage of the first polypropylene resin is not less than 45%, the mass percentage of the amine compound is 19.9-60%, and the mass percentage of the lubricant is 0.5-5%.

[0011] Preferably, the mass percentage of the lubricant is 2-12%, based on the sum of the masses of the amine compound and the lubricant.

[0012] For example, based on the sum of the masses of the amine compound and the lubricant, the mass percentage of the lubricant may be any one or a combination of both of the following: 2%, 3%, 4%, 4.5%, 4.7%, 5%, 5.5%, 6%, 7%, 8%, 8.4%, 8.5%, 9%, 10%, 11%, 12%.

[0013] More preferably, the mass percentage of the lubricant is 4.7 to 8.5%, based on the sum of the masses of the amine compound and the lubricant.

[0014] Preferably, the melt flow rate of the first polypropylene resin at 230°C and 2.16 kg load is 1~150 g / 10 min.

[0015] Preferably, the VOC reduction composition comprises the following components in parts by weight: 45-55 parts of a first polypropylene resin, 40-50 parts of an amine compound, and 2-4 parts of a lubricant.

[0016] Preferably, the VOC reduction composition further includes the following components in parts by weight: 0.5 to 5 parts of heat stabilizer. The heat stabilizer includes, but is not limited to, at least one of phenolic heat stabilizers, amine heat stabilizers, phosphite heat stabilizers, acryloyl functional group and thioester complex heat stabilizers, and calixarene heat stabilizers.

[0017] Secondly, the present invention provides a method for preparing a VOC reduction composition, comprising the following steps: The components of the VOC reduction composition are mixed and then fed into a twin-screw extruder for melt extrusion granulation to obtain the VOC reduction composition.

[0018] Thirdly, the present invention provides the application of the VOC reduction composition as described in the first aspect in the preparation of automotive interior parts.

[0019] Fourthly, the present invention provides a polypropylene composite material comprising the VOC-reducing composition as described in the first aspect.

[0020] Preferably, the polypropylene composite material comprises the following components in parts by weight: 60-99 parts of a second polypropylene resin and 1-10 parts of a VOC-reducing composition.

[0021] More preferably, the melt flow rate of the second polypropylene resin at 230°C and 2.16 kg load is 1~150 g / 10 min.

[0022] Preferably, in the polypropylene composite material, the VOC reduction composition has a mass percentage content of 1-10%, more preferably 3-5%.

[0023] More preferably, the polypropylene composite material further includes the following components in parts by weight: 1 to 30 parts of modifier, wherein the modifier includes at least one of antioxidant, toughening agent, and filler.

[0024] The antioxidants include, but are not limited to, at least one of thioether antioxidants, polyaromatic amine antioxidants, and hindered amine antioxidants; the toughening agents include, but are not limited to, polyolefin elastomers; and the fillers include, but are not limited to, at least one of silica, calcium carbonate, talc, wollastonite, kaolin, barium sulfate, and glass fiber.

[0025] Fifthly, the present invention provides an application of the polypropylene composite material as described in the fourth aspect in the preparation of automotive interior parts.

[0026] In this invention, the automotive interior components include, but are not limited to, any one of the following: automotive dashboard assembly, door trim panels, carpets, headliner, automotive wiring harness, and seat assembly.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention combines a first polypropylene resin, a specific lubricant and a specific amine compound to obtain a composition with good activity. This composition can reduce aldehyde VOCs during processing (such as extrusion granulation or injection molding), making the composition suitable for the preparation of automotive interior parts. Detailed Implementation

[0028] To better illustrate the purpose, technical solution, and advantages of this invention, the invention will be further described below with reference to specific embodiments and comparative examples. The purpose of this description is to provide a detailed understanding of the invention, not to limit its scope. All other embodiments obtained by those skilled in the art without inventive effort are within the protection scope of this invention.

[0029] Unless otherwise specified, the experimental reagents and instruments involved in the implementation of this invention are all commonly used ordinary reagents and instruments.

[0030] The source information and performance parameters of the components described in each embodiment and comparative example are as follows: Polypropylene resin 1: Grade EP548R, manufactured by Zhenhai Refining & Chemical, according to ISO1133-2011, the melt flow rate at 230℃ and 2.16Kg load is 30g / 10min; Polypropylene resin 2: grade PPM60RHC, manufactured by Zhenhai Refining & Chemical, according to ISO1133-2011, melt flow rate at 230℃ and 2.16Kg load is 60g / 10min; Amine compound 1: Hydrogenated palmityl primary amine, brand name XGPA-HPD, manufactured by Shandong Xinguang Chemical; Amine compound 2: dihydrotallowylamine, brand name XGSA-DiHT, manufactured by Shandong Xinguang Chemical; Amine compound 3: Tetradecyl primary amine, brand name XGPA-14, manufactured by Shandong Xinguang Chemical; Amine compound 4: tallow-based primary amine, brand name XGPA-T, manufactured by Shandong Xinguang Chemical; Lubricant 1: Fatty acid amide, brand name MSA-255, manufactured by MB in South Korea; Lubricant 2: Pentaerythritol tetrastearate, brand name MSA-120, manufactured by MB in South Korea; Lubricant 3: Zinc stearate, commercially available; Heat stabilizer: Phosphite antioxidant, brand name Antioxidant 168, manufacturer is Lianlong; Toughening agent: Polyolefin elastomer, brand name POE 7447, manufactured by Dow Chemical; Filler: Talc powder, brand name TYT-777A, manufactured by Liaoning Beihai Industrial Group; Antioxidant: It is a compound of tris(2,4-di-tert-butylphenyl) phosphite (antioxidant 168) and pentaerythritol β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (antioxidant 1010) in a 1:1 mass ratio.

[0031] Unless otherwise specified, all components and raw materials used in the embodiments and comparative examples of this invention are commercially available, and the same type of components and raw materials are used in each parallel experiment.

[0032] Examples 1-10 Examples of the VOC reduction composition of the present invention are shown in Table 1, and the components of the VOC reduction composition and the weight parts of each component are shown in Table 1.

[0033] The method for preparing the VOC reduction composition includes the following steps: The components are mixed and then melt-extruded and granulated using a twin-screw extruder to obtain the VOC reduction composition. During melt extrusion, the temperature zones of the twin-screw extruder from the feeding section to the die head are as follows: Zone 1 temperature 190℃, Zone 2 temperature 210℃, Zone 3 temperature 210℃, extrusion die head temperature 230℃, screw speed 500rpm, and screw length-to-diameter ratio 40:1.

[0034] Table 1 (Unit: parts by weight) Comparative Examples 1-7 The only difference between each comparative example and the embodiment is the type and ratio of components, as shown in Table 2.

[0035] Table 2 (Unit: parts by weight) Application Examples 1-15 Application examples of the polypropylene composite material of the present invention are shown in Table 3, where each component of the polypropylene composite material and the weight parts of each component are shown.

[0036] The preparation method of the polypropylene composite material includes the following steps: The components are mixed and then melt-extruded and granulated using a twin-screw extruder to obtain the polypropylene composite material. During melt extrusion, the temperature zones of the twin-screw extruder from the feeding section to the die head are as follows: Zone 1 temperature 190℃, Zone 2 temperature 210℃, Zone 3 temperature 210℃, extrusion die head temperature 230℃, screw speed 500rpm, and screw length-to-diameter ratio 40:1.

[0037] Table 3 (Unit: parts by weight) Application Comparative Examples 1-7 The differences between the comparative examples and the application examples are only in the types and proportions of components, as shown in Table 4.

[0038] Table 4 Example of effect The composite materials prepared in each application example and comparative example were subjected to the following performance tests. The test results are shown in Tables 5 and 6. The test methods are as follows: The sample was injection molded into a 100mm*100mm*3mm square plate and tested using the 10L bag method according to the Li Auto OEM standard Q / LiA5400018-2021(V3). The pass standard is: acetaldehyde content ≤80μg / m³. 3 .

[0039] Table 5 Table 6 As can be seen from application examples 1-15, the present invention, through the compounding of polypropylene, a specific lubricant, and a specific amine compound, can enable the composition to reduce aldehyde VOCs during processing such as extrusion granulation and injection molding, resulting in an acetaldehyde content of less than 60 μg / m³ in the prepared polypropylene composite material. 3 .

[0040] As can be seen from Application Examples 1 and 13-15, based on the sum of the masses of the amine compound and the lubricant, the composition has a better effect on reducing aldehyde VOCs during processing when the mass percentage of the lubricant is 4.7-8.5%.

[0041] As can be seen from Application Example 1, Application Example 8, Application Comparative Example 1 and Application Comparative Example 7, compared with other amine compounds, the hydrogenated palmityl primary amine and / or dihydrogenated tallow amine used in this invention can significantly reduce the acetaldehyde content.

[0042] As can be seen from Application Example 1 and Application Comparative Example 2, compared with other lubricants, the present invention can significantly reduce the acetaldehyde content by introducing fatty acid ester lubricants or fatty acid amide lubricants into the VOC reduction composition.

[0043] As can be seen from Application Example 1 and Application Comparative Examples 3-6, the present invention can significantly reduce the acetaldehyde content by rationally selecting the weight parts of each component in the VOC reduction composition.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A VOC abatement composition characterized in that, The product comprises the following components in parts by weight: 28-82 parts of a first polypropylene resin, 19-62 parts of an amine compound, and 0.4-5.2 parts of a lubricant; wherein the amine compound includes at least one of hydrogenated palmityl amine and dihydrogenated tallow amine, and the lubricant includes at least one of fatty acid ester lubricant and fatty acid amide lubricant.

2. The VOC abatement composition of claim 1, wherein, Based on the sum of the masses of the amine compound and the lubricant, the mass percentage of the lubricant is 2-12%, more preferably 4.7-8.5%.

3. The VOC abatement composition of claim 1, wherein, The melt flow rate of the first polypropylene resin at 230°C and 2.16 kg load is 1~150 g / 10 min.

4. The VOC abatement composition of claim 1, wherein, The composition comprises the following components in parts by weight: 45-55 parts of a first polypropylene resin, 40-50 parts of an amine compound, and 2-4 parts of a lubricant.

5. The VOC abatement composition of claim 1, wherein, It also includes the following components in parts by weight: 0.5 to 5 parts of heat stabilizer.

6. A process for the preparation of the VOC abatement composition according to any one of claims 1 to 5, characterized in that, Includes the following steps: The components of the VOC reduction composition are mixed and then fed into a twin-screw extruder for melt extrusion granulation to obtain the VOC reduction composition.

7. The use of a VOC-reducing composition as described in any one of claims 1 to 5 in the preparation of automotive interior parts.

8. A polypropylene composite, characterized in that, Includes the VOC reduction composition as described in any one of claims 1 to 5.

9. The polypropylene composite of claim 8, wherein the polypropylene is a homopolymer of propylene. It comprises the following components in parts by weight: 60-99 parts of second polypropylene resin and 1-10 parts of VOC reduction composition.

10. The application of a polypropylene composite material as described in any one of claims 8 to 9 in the preparation of automotive interior parts.

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