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CN-122011691-A - Temperature-dependent smell-variable master batch, PC/ABS alloy, method and application

CN122011691ACN 122011691 ACN122011691 ACN 122011691ACN-122011691-A

Abstract

The application discloses a temperature-dependent variable odor master batch, a PC/ABS alloy, a method and application thereof, and belongs to the technical field of PC/ABS alloy materials. The temperature-dependent variable odor master batch is prepared from the following components, by weight, 50-95 parts of carrier resin, 1-15 parts of compatilizer, 0.1-1 part of sodium copper chlorophyllin, 0.1-1 part of vanillin and 0.1-1 part of zeolite powder. The application also provides a PC/ABS alloy with low emission and changeable smell along with temperature, which comprises, by weight, 50-90 parts of polycarbonate, 10-50 parts of ABS, 1-10 parts of toughening agent, 1-5 parts of porous adsorbent, 0.5-3 parts of deodorant and 0.1-1 part of smell along with temperature. The PC/ABS alloy has the characteristic of low VOC, the technical index meets the mechanical property requirement of the automotive interior material, and meets the requirements of bamboo fragrance at normal temperature and bean fragrance at high temperature, and the smell feeling is pleasant.

Inventors

  • SHI JIAN
  • HE XIAOXIANG

Assignees

  • 奇瑞新能源汽车股份有限公司

Dates

Publication Date
20260512
Application Date
20260106

Claims (10)

  1. 1. The temperature-dependent variable odor master batch for the PC/ABS alloy is characterized by being prepared from the following components in parts by weight: 82-95 parts of carrier resin; 1-15 parts of compatilizer; 0.1-1 part of sodium copper chlorophyllin; 0.1-1 part of vanillin; 0.1-1 part of zeolite powder.
  2. 2. The temperature-dependent variable odor master batch of claim 1 wherein said carrier resin is polybutylene terephthalate.
  3. 3. The temperature-dependent variable odor master batch of claim 1 wherein said compatibilizer is an ethylene methyl acrylate glycidyl methacrylate terpolymer.
  4. 4. The temperature-dependent variable odor master batch according to claim 1, wherein the purity of the sodium copper chlorophyllin is more than or equal to 98%, the purity of the vanillin is more than or equal to 99.5%, the ammonia absorption amount of the zeolite powder is more than or equal to 160mmol/100g, and the particle size is 1000-5000 meshes.
  5. 5. The PC/ABS alloy with low emission and variable odor with temperature is characterized by comprising the following components in parts by weight: 50-85 parts of polycarbonate; 10-45 parts of ABS; 1-10 parts of toughening agent; 1-5 parts of porous adsorbent; 0.5-3 parts of deodorant; 0.1-1 part of smell master batch; wherein the odor master batch adopts the temperature-dependent variable odor master batch according to any one of claims 1 to 4.
  6. 6. The low emission temperature-dependent variable odor PC/ABS alloy of claim 5 wherein said toughening agent comprises one or more of a methyl methacrylate-styrene type toughening agent, a methyl methacrylate-acrylic type toughening agent, an acrylic-silicone rubber type toughening agent.
  7. 7. The low emission temperature-dependent variable odor PC/ABS alloy of claim 5 wherein the porous adsorbent comprises one or more of zeolite powder or activated carbon; The deodorant comprises one or more of active zinc oxide, phenolic antioxidant 1010 or phosphate antioxidant 168; the number average molecular weight of the ABS is 90000-150000, wherein the mass ratio of butadiene is 5-25wt%, the mass ratio of acrylonitrile is 10-30wt%, and the mass ratio of styrene is 40-70wt%; The polycarbonate has a number average molecular weight of 18000-30000 and a glass transition temperature of 140-150 ℃.
  8. 8. A method for producing a PC/ABS alloy having a low emission of a temperature-dependent variable odor according to any one of claims 5 to 7, comprising the steps of: mixing carrier resin, compatilizer, sodium copper chlorophyllin, vanillin and zeolite powder to obtain a mixed material; banburying the mixed materials to prepare master batches with smell changeable along with temperature; Premixing the temperature-dependent variable odor master batch, the polycarbonate, the ABS, the toughening agent, the porous adsorbent and the deodorant to obtain a premix; And (3) putting the premix into a double-screw extruder, injecting nitrogen from the first region to the second region of the extruder, injecting supercritical carbon dioxide into the third region to the fourth region and the fifth region to the eighth region of the extruder respectively, carrying out melt extrusion, and granulating to obtain the PC/ABS alloy.
  9. 9. The method for preparing a low emission temperature dependent odor causing PC/ABS alloy according to claim 8 wherein the banburying is performed at 180-260 ℃ for 8-15min.
  10. 10. Use of a low-emission temperature-dependent variable odor PC/ABS alloy according to any one of claims 5 to 7 in automotive interior material.

Description

Temperature-dependent smell-variable master batch, PC/ABS alloy, method and application Technical Field The application belongs to the technical field of PC/ABS alloy materials, and particularly relates to a temperature-dependent smell-variable master batch, a PC/ABS alloy, a method and application. Background The environmental quality of the automobile interior has become a key index for measuring the quality and the driving comfort of the whole automobile, and is mainly divided into two indexes of VOC and smell of the interior of the whole automobile. Firstly, the requirement of VOC limit is passed, wherein pentacene trialdehyde is the main limiting substance, namely benzene, toluene, ethylbenzene, xylene, styrene, formaldehyde, acetaldehyde and acrolein. Furthermore, in terms of odor index, it is desirable to meet both odor level requirements and odor perception requirements, i.e., odor is perceived as pleasant by consumers rather than irritating negative perception, as is typical of several negative odor perception: refuse smell, namely smell of refuse piled up place. This is a sulfur, sour, acetic odor. Smelly fish smell-smell of rotten fish, smell of stale fish. This smell is an amine smell. Animal smell, smell of fur of livestock, smell of barn of livestock. This is mainly a phenolic odour. Pungent smell-the pungent sensation that the nose or throat can feel immediately after inhaling or sniffing. In odor testing, a sample plate or block of material is typically heated to a specific temperature, typically 80 ℃, for 2 hours. Under high temperature conditions, the material releases small molecules, causing different odor sensations. The heat resistance of matrix resin and small molecule residues of the automotive interior material, especially plastic material, easily affect the odor performance, and in order to meet the performance requirements of corresponding parts, a plurality of auxiliary agents or master batches are required to be added, and the more the additives are, the more small molecule substances easily migrate to the surface and are emitted into the air in a high-temperature environment, so that the VOC value and the odor performance of the whole automobile are affected. Among them, polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) alloys are widely used for automotive interior parts, such as instrument panels, door shields, etc., due to their excellent combination of properties. However, the ABS component in PC/ABS material is not high in heat resistance, the residual micromolecule substances, especially thiol substances, of the ABS under the high temperature condition are difficult to remove by the process, the olfactory threshold is extremely low, the PC/ABS material can be perceived at extremely low concentration, the odor tends to be bad, and negative feelings such as pungent odor are generated. In order to improve the smell, the prior art mainly has three ideas, namely, small molecular substances are removed as much as possible, VOC is reduced, and thus the smell grade is reduced. However, the base material has specific process requirements, and the surface treatment piece is easy to get to the negative feeling of the pungent smell if not treated with special smell type. As disclosed in patent document CN101469122B, a low-odor and low-emission PC/ABS alloy material and a preparation method thereof are disclosed, wherein hydrophobic odor master batch is prepared by using a hydrophobic odor inhibitor, and the hydrophobic odor adsorption master batch is used as a hydrophobic odor adsorption system to prepare low-odor and low-emission PC/ABS, and volatile small molecules and organic compounds generating odor are adsorbed by the adsorption system. As disclosed in patent document CN106751680B, a PC/ABS alloy with ultra-low odor and ultra-low emission and a preparation method thereof are disclosed, wherein after a premix is prepared by a porous structure of a silicate porous material, the silicate porous material is added through a side feeding port, and the PC/ABS composite material is prepared by granulating. In both schemes, no measure for improving the odor feeling by adding specific odor substances is added. Secondly, in order to avoid negative odor feeling, raw material manufacturers add specific odor substances, represented by green tea flavor and chrysanthemum flavor, into PC/ABS base materials, but tests show that the addition of the substances easily causes VOC fluctuation, and meanwhile, insufficient odor stability is caused at normal temperature and high temperature, so that uniform evaluation feeling is difficult to obtain. In particular, at high temperatures, the odor volatile substances increase and the intensity increases, and in theory the odor sensation should be more pronounced than at normal temperature, but the replicability of the odor sensation is reduced due to the instability of the odor tendency. In an actual vehicle use state, the temperature inside the vehic