Plasticizer is widely used in industrial production of polymer materials auxiliaries, also known as plasticizers. All substances added to polymer materials that increase polymer plasticity are called plasticizers. The use of plasticizer can improve the properties of polymer materials, reduce production costs and improve production efficiency. is a class of important chemical product additives, as additives are widely used in plastic products, concrete, marl, cement, gypsum, cosmetics and cleaning agents and other materials, especially in polyvinyl chloride plastic products, in order to increase plastic plasticity and improve the strength of plastics, phthalates need to be added, which can sometimes reach 50% of the product.       The main plasticizer is compatible with the resin, its permeability is small and its volatility is low, which can improve the plasticizing efficiency. The main plasticizers commonly used are phthalates and phosphate esters. The secondary plasticizer is also called auxiliary plasticizer, and its main function is to use it with the main plasticizer to reduce the cost. The common secondary plasticizers are cold resistant and cyclic plasticizers such as aliphatic dicarboxylate.

Anhui Sinograce Chemical Co., Ltd Polyurethane condoms, known as condoms, are made of polyurethane condoms, similar to latex condoms. Polyurethane was applied to condom production in Japan, until the emergence of China's Nakagawa 001, which broke Japan's monopoly on the production field. Because the common latex condoms on the market are thicker and polyurethane has good ductility, condoms are often thin, such as Nakagawa 001, thin to 0.01. It is said that every time the condom thickness is reduced by 0.01, male pleasure will increase by 20. Then you can imagine how ultra-thin polyurethane condoms such as Nakagawa 001 swell in passion. In addition to ultra-thin, the toughness and thermal conductivity of polyurethane condoms are very good, especially in polyurethane condoms such as Nakagawa 001 outstanding, but also to solve the past polyurethane condoms poor elasticity, toughness, softness is not enough shortcomings, coupled with ultra-thin mental energy, The overall sense of use is great. Polyurethane condoms also have a hidden advantage, that is, anti-allergic. About 8% of the world's people have latex allergies, which are clearly not suitable for latex condoms, and polyurethane condoms can bring them more happiness. In addition, polyurethane condoms due to material deconstruction, no cavity, so contraceptive effect is better, worth trying oh. The company mainly engaged in polyurethane emulsion, acrylic emulsion, welcome to buy.

1.Introduction to silicone acrylic emulsion Silicon-acrylic emulsion is a kind of composite emulsion. It is a copolymer emulsion of organosilicone and acrylate.Acrylic resin has many excellent characteristics, such as weather resistance and light resistance, long time under ultraviolet irradiation is not easy to yellow。In addition, it also has flexibility, so it is often used as a leather finishing agent。However, as acrylic resin belongs to thermoplastic materials, it is a linear molecular structure, lack of crosslink points, not easy to form a network structure, sensitive to temperature changes, high temperature return viscosity, low temperature lack of elastic, that is, easy to appear hot viscosity cold brittle phenomenon. The main chain of organosilicon resin is si-o bond, and its bond energy is 450k J/mol, which is much higher than the bond energy of 345kJ/mol of c-c bond and bond energy of 351kJ/mol of c-o bond. Therefore, organosilicon resin has good resistance to high temperature, infrared radiation and ultraviolet light, chemical resistance；In addition, the surface energy of organosilicon resin and low vitrification temperature are low.With good hydrophobic wear resistance and anti - pollution. In summary, the modification of acrylic resin with an appropriate amount of silicone resin can not only make up for the defects of acrylate, but also improve its mechanical properties. 2.Modification method of silicon - acrylic emulsion Silicone acrylic emulsion modified method there are two ways: the physical method is to a certain amount of siloxane and acrylate mechanical mixing, this method is simple, but due to both the surface and the difference of molecular structure, poor compatibility with polysiloxane acrylate, because the former is migration, caused by composite emulsion stability is poor, prone to phase separation phenomenon, the result is not ideal.Chemical method is the use of emulsion polymerization, in addition to the siloxane and acrylate have a simple physical cross-linking, but also the existence of chemical bonds, so that the two components of the polarity of the material with a large difference in the combination, in the micro to achieve uniform dispersion, improve the stability of the emulsion. The silicon-propylene composite emulsion was prepared by chemical method, and then the silicon-propylene composite emulsion was used to replace the water-borne polyurethane emulsion.The modified waterborne polyurethane emulsion has the advantages of three, and the water resistance is improved. According to the preparation method of si-acrylic emulsion, si-acrylic emulsion was prepared by seed emulsion polymerization with methyl methacrylate acrylic vinyl silicone oil as raw material.Then the prepared silicon-acrylic emulsion was modified to the prepared waterborne polyurethane, the composite emulsion was configured by blending method, the film was formed on different substrates, and the mechanical properties of the film such as adhesion...

In February 2020, during the severe situation of covid-19, Sinograce Chemical company dared to assume social responsibilities and made a modest contribution to the fight against covid-19. It donated alcohol and 84 disinfectant and other epidemic prevention materials to hefei primary and secondary schools and universities for daily disinfection of schools, with a total of 10 tons of 84 disinfectant and 5,000 liters of alcohol.In the hope of an early end to COVID-19 epidemic, received the school's praise and thanks!