36
J. Chen et al.
plastic products in the world in the 1990s was 9%, and demand is expected to rise
after 20,000 years.
As a filler, calcium carbonate and talc are used the most. The total consumption
of fillers for plastics is about 10% of the amount of resin used, especially in PVC
and PP. For example, in the PP packing tape, the CaCO 3 filler can be added in an
amount of more than 50% of the total weight, which greatly reduces the production
cost.
In order to improve the compatibility between inorganic fillers and synthetic
resins, and to improve the processing technology and product quality, the surface
modification technology of fillers has been widely used. Commonly used surface
agents are two types of coupling agents and surfactants. The coupling agent is bonded
to the surface of the filler by chemical bonds, and the effect is good, but the cost
is high, sensitive to moisture and the operation is inconvenient; the surfactant is
modified by adsorption, the operation is convenient and the cost is low. The amount
of the surface treatment agent is about 1–2% of the amount of the filler, and it
is estimated that the surface treatment agent consumption for the plastics industry
alone is between 150,000 and 250,000 tons per year. The oleochemicals currently
used as surface treatment agents are mainly stearic acid and its salts. In addition,
long-chain quaternary ammonium-treated organic clay has long been used as an
additive to coatings.
➅ Coatings Industry
The use of unsaturated oils such as tung oil to prepare oils can be seen as the earliest
examples of oleochemicals used in the coatings industry. After nearly 10 years of
efforts, China’s coating production has ranked fourth in the world, and the product
structure has entered the era of synthetic coatings. According to statistics from the
chemical industry, in 1997 China’s coating output was 1.37 million tons, of which
synthetic resin coatings accounted for 65%.
The development direction of the coatings industry is water-based, solvent-free
and powdered. It is predicted that the twenty-first century will be the century of functional coatings, and leaving the additives and their applications, this prediction is just
empty talk. Among the main additives of class l9, there may be emulsifiers, pigmentwetting agents, dispersants, defoamers, leveling agents, thickeners, antistatic agents,
adhesion promoters and the like.
➆ Food Industry
China is a country with a large population. The output value of the food industry is
above 600 million yuan, accounting for 11.5% of the total industrial output value.
The average growth rate in the past 10 years is around 12%. However, from the
perspective of development speed, processing depth and product structure, there are
still many problems. One of the important issues is that the food additive industry
can’t meet the needs: less varieties, lower quality and higher prices.
Food emulsifiers are one of the most demanding additives, and the current annual
consumption in the world is between 250,000 and 300,000 tons. Due to the backwardness of food processing technology in China, the dosage of emulsifier is only
J. Chen et al.
plastic products in the world in the 1990s was 9%, and demand is expected to rise
after 20,000 years.
As a filler, calcium carbonate and talc are used the most. The total consumption
of fillers for plastics is about 10% of the amount of resin used, especially in PVC
and PP. For example, in the PP packing tape, the CaCO 3 filler can be added in an
amount of more than 50% of the total weight, which greatly reduces the production
cost.
In order to improve the compatibility between inorganic fillers and synthetic
resins, and to improve the processing technology and product quality, the surface
modification technology of fillers has been widely used. Commonly used surface
agents are two types of coupling agents and surfactants. The coupling agent is bonded
to the surface of the filler by chemical bonds, and the effect is good, but the cost
is high, sensitive to moisture and the operation is inconvenient; the surfactant is
modified by adsorption, the operation is convenient and the cost is low. The amount
of the surface treatment agent is about 1–2% of the amount of the filler, and it
is estimated that the surface treatment agent consumption for the plastics industry
alone is between 150,000 and 250,000 tons per year. The oleochemicals currently
used as surface treatment agents are mainly stearic acid and its salts. In addition,
long-chain quaternary ammonium-treated organic clay has long been used as an
additive to coatings.
➅ Coatings Industry
The use of unsaturated oils such as tung oil to prepare oils can be seen as the earliest
examples of oleochemicals used in the coatings industry. After nearly 10 years of
efforts, China’s coating production has ranked fourth in the world, and the product
structure has entered the era of synthetic coatings. According to statistics from the
chemical industry, in 1997 China’s coating output was 1.37 million tons, of which
synthetic resin coatings accounted for 65%.
The development direction of the coatings industry is water-based, solvent-free
and powdered. It is predicted that the twenty-first century will be the century of functional coatings, and leaving the additives and their applications, this prediction is just
empty talk. Among the main additives of class l9, there may be emulsifiers, pigmentwetting agents, dispersants, defoamers, leveling agents, thickeners, antistatic agents,
adhesion promoters and the like.
➆ Food Industry
China is a country with a large population. The output value of the food industry is
above 600 million yuan, accounting for 11.5% of the total industrial output value.
The average growth rate in the past 10 years is around 12%. However, from the
perspective of development speed, processing depth and product structure, there are
still many problems. One of the important issues is that the food additive industry
can’t meet the needs: less varieties, lower quality and higher prices.
Food emulsifiers are one of the most demanding additives, and the current annual
consumption in the world is between 250,000 and 300,000 tons. Due to the backwardness of food processing technology in China, the dosage of emulsifier is only