A kind of ultraviolet photocuring PP free treatment water PVD primer and preparation method thereof
A light-curing, treatment-free technology, applied in coatings, polyester coatings, polyurea/polyurethane coatings, etc., can solve the problems of cost and energy waste, VOC consumption, poor adhesion, etc., to eliminate oil pits and reduce scratches damage, enhance the effect of adhesion
Active Publication Date: 2020-06-02
YIXING HONGTAI CHEM
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Problems solved by technology
[0003] However, polypropylene (PP) plastic has low surface energy, low polarity, poor wettability and certain crystallinity, so it is not easy to directly adhere to materials such as paints containing polar functional groups or polar components.
PP molecules are non-polar, and the adhesion between plastic and foreign objects is one of the worst. Before painting, the polarity of the surface must be treated. It is common to spray a layer of PP treated water on the surface of the PP material, and then spray on the PP treated water. PP vacuum electroplating primer, so that the coating adhesion will be very stable, but spraying PP treated water will cause cost waste, energy consumption and a large amount of VOC emissions, which will cause environmental pollution, and the solvent generally contained in PP treated water is toluene and xylene, which can cause great harm to the human body
Method used
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preparation example Construction
[0037] The following are the preparation methods of PVD primers for various PP materials:
[0038] (1) Add acrylic resin and acrylic acid monomer into the reaction kettle, heat and stir for 6-8 minutes, heat to 55-60°C, add additives and adhesion promoters, keep the temperature and stir, continue heating and stirring for 3-5 minutes;
[0039] (2) Continue to heat until the temperature in the reactor rises to 65-70°C, add photoinitiator and modified polyester alkene resin in the reactor, then adjust the rotating speed of the stirring device to stir for 3-4min; At the same temperature and stirring rate, slowly add full-chain acrylic acid modified polybutadiene resin, and continue heating and stirring for 8-10 minutes;
[0040] (3) When the temperature drops to 28-32°C, add solvent into the reaction kettle, stir evenly, and check the discharge.
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The invention discloses a UV- curable PP treating water-free PVD priming paint, which is characterized by comprising the following ingredients (by weight): 20-30 parts of acrylic resin, 10-20 parts ofacrylic monomer, 15-20 parts of modified polyester acrylic acid, 30-45 parts of whole-chain acrylic modified polybutadiene resin, 1-5 parts of a photoinitiator, 5-10 parts of an adhesion promoter, 0.5-3 parts of an auxiliary agent and 30-40 parts of a solvent. The paint of the invention has good weatherability and strong adhesion. Requirements of people on surface finishing of high-grade productsare met. As spraying of PP treating water is avoided, consumption for production of unit product is reduced, labor productivity is raised, production cost of unit product is greatly reduced, and environmental pollution and the damage to human body are also avoided.
Description
technical field [0001] The invention relates to the field of PVD (Physical Vapor Deposition) of cosmetic PP packaging materials, in particular to a cosmetic PP packaging material PVD primer and a preparation method and application thereof. . Background technique [0002] Polypropylene (PP) is a semi-crystalline thermoplastic. It has high impact resistance, strong mechanical properties, and resistance to various organic solvents and acid and alkali corrosion. It is widely used in cosmetic packaging bottles with its excellent performance advantages and relatively cheap prices. UV vacuum electroplating coating is a new type of ultraviolet curing coating developed on the basis of UV plastic coating. With the development of plastic decoration technology, a plastic products Metallized decoration technology came into being, which is formed by using a plastic substrate to coat a primer, vacuum electroplating, coating a layer of metal film, and then coating a topcoat. The painte...
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IPC IPC(8): C09D147/00C09D175/14C09D163/10C09D133/04C09D167/06C09D7/65
CPCC08L2205/025C08L2205/035C09D7/65C09D147/00C08L75/14C08L63/10C08L67/06C08L51/06C08L83/04C08L33/04
Inventor 陈朝岚吴玉民刘健吴刚强郭猛彭叶刘晓明卢礼灿
Owner YIXING HONGTAI CHEM