◆ Low-temperature type: The decomposition temperature of common ADC is generally higher than 200°C. For many resins with low softening point and heat aging, it is hoped that they can have low-temperature decomposed products. At present, the development of low-temperature ADC is the main research topic in the field of modification. one. The main choice is to choose one or more activators and ADC in a certain proportion. The activator can use chromium, zinc, lead and other metal compounds, urea derivatives and nitroguanidine, etc. The minimum decomposition temperature of ADC foaming agent after modification can reach 80°C.
â—† Highly disperse type: In order to obtain a homogeneous, non-porous, smooth surface polymer, it is required that the blowing agent be completely dispersed within the polymer. The general ADC foaming agent is susceptible to agglomeration by groups such as static electricity, which affects the quality of the product. Therefore, it is very important to develop highly dispersible products. ADC blowing agents can be mixed with fine powders of certain inert inorganic compounds. In addition, surfactants can be added to ADC products to obtain highly dispersed products.
â—† Inhibiting foaming type: Dicarboxylic acids and their hydrazides, phenols, amines and triazoles can inhibit the decomposition of ADC. When metal ion activators are present, the inhibitory effect is better. If a foaming-type foaming agent material is added, uneven patterns are caused due to the difference in the foaming effect, thereby producing an upholstery material such as foamed wallpaper.
â—† Compound type: The compounding of ADC can mix other additives with specific functions with ADC or several foaming agents. At present, the development of plastics additives industry is the mainstream.
â—† Foaming masterbatch: As with the development trend of other synthetic material additives, masterbatch has become one of the trends in the modification of blowing agent ADC. The masterbatch can be obtained by mixing the ADC, foaming aids, and polymers to effectively solve problems such as dispersion and dust pollution. At present, there is no domestic development. For example, Americhem Corporation, the world's most famous foaming agent masterbatch manufacturer, currently has a special ADC product series available for Supercell; the Exocerol and other foaming agents introduced by Henly Corporation in the US also use masterbatches. Appears, such as Exocerol 232 and LAB 010 are endothermic/exothermic blends, AO 38 is a mixture of several exothermic blowing agents.
Therefore, in the future, the key to ADC foaming agent is to learn from foreign experience and vigorously develop endothermic, endothermic/exothermic and pyrolytic foaming agent types, and to reduce the dust pollution of the foaming agent through masterbatch and surface modification. .
Blowing agent OBSH
Foaming agent OBSH is a low-temperature foaming agent commonly used in the plastics and rubber industry. It is mainly obtained from the reaction of diphenyl ether sulfonated with hydrazine hydrate. The advantage is that the decomposition temperature is low, and it is not necessary to add decomposition aids. It is suitable for various synthetic materials. Very low toxicity, suitable for contact with food packaging materials; good electrical insulation properties; with the dual role of vulcanizing agent and foaming agent; fine and uniform cell. First developed and used in Japan, it has been favored and widely used in the field of UHF wire and cable. At present, a variety of OBSH modified serialized products have been developed abroad, such as OBSH modified products such as NW 3000, 5000, 100S, and 100M manufactured by Yonghe Chemicals. China also carries out research and development of OBSH. Currently, Shanxi Chemical Research Institute and Hangzhou Haihong Company have established small-scale production facilities. However, due to its relatively high price, applications are limited.
Blowing agent DPT, chemical name N, N'-dinitrosopentamethyltetramine, mainly used as rubber foaming agent, heat of decomposition, often added urea, urea derivatives, melamine, etc. to prevent irritation The odor is basically not used for plastic foaming. There are many domestic production companies and the consumption is not high.
â—† Highly disperse type: In order to obtain a homogeneous, non-porous, smooth surface polymer, it is required that the blowing agent be completely dispersed within the polymer. The general ADC foaming agent is susceptible to agglomeration by groups such as static electricity, which affects the quality of the product. Therefore, it is very important to develop highly dispersible products. ADC blowing agents can be mixed with fine powders of certain inert inorganic compounds. In addition, surfactants can be added to ADC products to obtain highly dispersed products.
â—† Inhibiting foaming type: Dicarboxylic acids and their hydrazides, phenols, amines and triazoles can inhibit the decomposition of ADC. When metal ion activators are present, the inhibitory effect is better. If a foaming-type foaming agent material is added, uneven patterns are caused due to the difference in the foaming effect, thereby producing an upholstery material such as foamed wallpaper.
â—† Compound type: The compounding of ADC can mix other additives with specific functions with ADC or several foaming agents. At present, the development of plastics additives industry is the mainstream.
â—† Foaming masterbatch: As with the development trend of other synthetic material additives, masterbatch has become one of the trends in the modification of blowing agent ADC. The masterbatch can be obtained by mixing the ADC, foaming aids, and polymers to effectively solve problems such as dispersion and dust pollution. At present, there is no domestic development. For example, Americhem Corporation, the world's most famous foaming agent masterbatch manufacturer, currently has a special ADC product series available for Supercell; the Exocerol and other foaming agents introduced by Henly Corporation in the US also use masterbatches. Appears, such as Exocerol 232 and LAB 010 are endothermic/exothermic blends, AO 38 is a mixture of several exothermic blowing agents.
Therefore, in the future, the key to ADC foaming agent is to learn from foreign experience and vigorously develop endothermic, endothermic/exothermic and pyrolytic foaming agent types, and to reduce the dust pollution of the foaming agent through masterbatch and surface modification. .
Blowing agent OBSH
Foaming agent OBSH is a low-temperature foaming agent commonly used in the plastics and rubber industry. It is mainly obtained from the reaction of diphenyl ether sulfonated with hydrazine hydrate. The advantage is that the decomposition temperature is low, and it is not necessary to add decomposition aids. It is suitable for various synthetic materials. Very low toxicity, suitable for contact with food packaging materials; good electrical insulation properties; with the dual role of vulcanizing agent and foaming agent; fine and uniform cell. First developed and used in Japan, it has been favored and widely used in the field of UHF wire and cable. At present, a variety of OBSH modified serialized products have been developed abroad, such as OBSH modified products such as NW 3000, 5000, 100S, and 100M manufactured by Yonghe Chemicals. China also carries out research and development of OBSH. Currently, Shanxi Chemical Research Institute and Hangzhou Haihong Company have established small-scale production facilities. However, due to its relatively high price, applications are limited.
Blowing agent DPT, chemical name N, N'-dinitrosopentamethyltetramine, mainly used as rubber foaming agent, heat of decomposition, often added urea, urea derivatives, melamine, etc. to prevent irritation The odor is basically not used for plastic foaming. There are many domestic production companies and the consumption is not high.
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