What is the function of plastic anti aging agents, and what are the functions of plasticizers

Polymer material products, in the process of its use, will be affected by external factors such as light, heat, oxygen, water and chemicals, so that the internal molecular structure changes, there will be a decrease in performance, the relative molecular weight will be reduced, and the surface of the product will appear yellowing, loss of luster, cracking, hardening and other phenomena, this phenomenon is called aging phenomenon. Aging phenomenon, in fact, in the synthesis of polymer materials, processing, storage and finished product application of all stages may occur, aging will lead to the short or end of the service life of polymer materials, aging products will be a large number of waste, resulting in a great waste of resources and serious environmental pollution.

Therefore, the anti-aging of polymer materials has become an urgent problem that needs to be solved in the polymer industry. The so-called anti-aging is to add antioxidants and light stabilizers and other stabilization additives to macromolecular substances, so as to delay the breakage or cross-linking of molecular chains, so that macromolecular polymers can better maintain their original structure and play an anti-aging role. Among them, amine antioxidant (TY1971CN antioxidant H, etc.) is one of the earliest developed antioxidant agents with the best antioxidant effect, which not only has a good protective effect on oxygen and ozone, but also plays a good protective role in light, heat, copper, etc., so it is very suitable for anti-aging use of polymer materials such as plastics and rubber.

Classification of plastic anti-aging agents:

The plastic antioxidants produced and consumed in China are divided into four categories: hindered phenols, phosphites, thioates and composite products.

1. Hindered phenol antioxidant: It is the main antioxidant of plastic materials, and its main role is to react with oxidative free radicals produced by oxidation in plastic materials to interrupt the growth of the active chain. Hindered phenol antioxidants are divided into monophenols, bisphenols, polyphenols, and nitrogen heterocyclic polyphenols according to their molecular structure.

2. Phosphite antioxidants and sulfur-containing antioxidants: both are auxiliary antioxidants. The main mechanism of action of the co-antioxidant is to decompose the highly reactive hydroperoxide in the plastic into the low-activity molecule through the change of the valency of phosphorus or sulfur atoms in the molecule.

3. Compound antioxidants: different types of main and auxiliary antioxidants, or antioxidants with different molecular structures of the same type, have different functions and application effects, each with its own advantages and disadvantages. Composite antioxidants are compounded by two or more different types or different varieties of antioxidants of the same type, which can learn from each other's strengths and weaknesses in plastic materials, show synergistic effects, and achieve the best anti-thermal and oxidative aging effect with the minimum amount and lowest cost.

Apply. Plasticizers are bulk industrial products, widely used in various fields of the national economy, including plastics, rubber, adhesives, cellulose, resins, medical equipment, cables and thousands of other products. For example, the commonly used plastic wrap is an additive-free PE (polyethylene) material, but its viscosity is poor; Another widely used is PVC (polyvinyl chloride) plastic wrap, which has a large amount of plasticizer to make PVC (polyvinyl chloride) material soft and increase viscosity, which is very suitable for fresh food packaging.

Another widely stocked plasticizer product is children's toys made of PVC, and the European Union has specified that the content of plasticizers in plastic toys must be below, but there are no clear regulations or restrictions in Taiwan. Cosmetics such as perfumes and nail polish that are often used by women use phthalates as fixatives to maintain the fragrance smell or make the nail polish film smoother.

Harm to human genes.

The research team of Taiwan Normal University also found that plasticizers will cause genotoxicity, which will harm human genes, and long-term consumption has the greatest risk of cardiovascular disease, and it will also cause great harm to the liver and urinary system.

Plasticizers can be used in the production of plastic products, and are also added to some materials such as concrete, wall plaster, cement and gypsum. Plasticizers have different effects in different materials. In plastics, it can make plastic products softer, tougher and more resilient, and more durable.

Plasticizers are often added to many plastic products that we come into contact with in our daily lives, from plastic packaging or containers, cosmetics, toys, to building materials such as plastic pipes and cable skins.

Hindered phenols, secondary aromatic amines and other hydrogen donors; tertiary amine electron donors; Free radical scavengers such as quinones can be used as plastic antioxidants. Anti-UV compound additives are added, and antioxidants are added at the same time for modified granulation.

Plastic anti-aging scanner is a kind of external light that can effectively vibrate the nucleus and absorb the external light of the purple letter with a wavelength of 270-380 nanometers, and is mainly used in unsaturated resins and products containing unsaturated resins.

Impairing male reproductive ability and promoting precocious puberty in women may cause gender disorders in children, and long-term ingestion of large amounts can also lead to liver cancer.

Long-term ingestion of large amounts can lead to liver cancer.

Increased risk of cardiovascular disease.

Reduced human reproductive capacity.