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Internal plasticizer and external plasticizer
2017-12-10 17:49:34
Internal plasticizer and external plasticizer
Plasticizers can be divided into two types, that is, the internal plasticizer and the external plasticizer.
The internal plasticizer is actually a part of the polymer. The general internal plasticizer is the second monomer introduced in the polymerization process of the polymer. Because of the second monomers in the molecular structure of the polymer, the polymer chains have lower isotacticity, which reduce the crystallinity of polymer chain. For example, the vinyl chloride vinyl ester copolymer is more soft than the vinyl chloride homopolymer. The internal plasticizer has a narrow range of use temperature and must be added to the polymerization process, so the internal plasticizer is less used.
An external plasticizer is a low molecular weight compound or polymer that is added to the polymer that needs to be plasticized, which can increase the plasticity of the polymer. An external plasticizer is usually a highly boiling liquid or a low melting point solid, and most of them are organic compounds. Usually, they do not react with polymers. The interaction with polymers is mainly due to swelling at elevated temperatures, forming a solid solution with polymers.
The external plasticizer has more comprehensive performance and convenient production and use, and is widely used. Generally speaking, plasticizers are external plasticizers. The adjacent benzene two formic acid two ester (DOP) and dibutyl phthalate (DBP) are outside the plasticizer. In order to meet the actual requirements, it should be compatible, durable, machinability, safe and economical.
Internal plasticizers and external plasticizers have increased rapidly in recent years, and are widely used. Internal plasticizers and external plasticizers are commonly used in all aspects of national life.
Plasticizer (Plasticizers), or plasticizer, plasticizer, is a kind of soft characteristics such as material additives. It is not only used in the production of plastic products, but also in a part of concrete, wall plaster, cement and gypsum. The effects of plasticizers are different in different materials. In plastic, it can make the plastic more soft, flexible, flexible, and more durable.
There are many kinds of plasticizers, but the most commonly used are DEHP[, two phthalic acid two (2- ethyl hexyl) ester. It is mainly used in PVC (polyvinyl chloride) plastic products, such as fresh-keeping film, food packaging, toys and so on. A lot of medical plastics, such as catheters, infusion bags and so on, also contain this kind of material. It has a wide range of changes in the content of plastic products, from 1% to 40%.
DEHP does not use a solid covalent bond in plastic, it is easier to get out of the plastic and enter the environment or the human body.
Two octyl terephthalate (plasticizer DOTP) raw materials are generally synthesized from the process route of terephthalic acid or two methyl terephthalate as raw material.
Safety data for export goods of two octyl terephthalate (plasticizer DOTP)
CAS No.:6422-86-2
State of the goods: export by general goods.
Use of two octyl terephthalate (plasticizer DOTP)
1.DOTP has good electrical and thermal properties. It can be used to replace DOP in the sheath of PVC plastic wire and can also be used in the production of artificial leather membrane. In addition, with excellent compatibility, terephthalic acid ester is two PVC acrylonitrile derivatives plastic plasticizer, plasticizer, plasticizer, polyvinyl butyral nitrile rubber plasticizer, plasticizer for cellulose nitrate. The improvement of the product and plays the role of hardness and deformation, can be used as softener in NBR, chloroprene rubber, EPDM rubber and other products three. Especially for cable material, it has good plasticizing effect and low volatility. It is widely used in various products that require heat resistance and high insulation. It is an ideal plasticizer for producing 70 PVC cable material and other volatile resistant products.
2.DOTP is used for the PVC products in the car, which can solve the fog problem of the glass window. DOTP is also used for high quality lubricants or lubricant additives furniture and interior decoration paint, and precision instruments, nitro varnish additives, paper softener, biaxially oriented polyester amide membrane film, plastic bags and other crafts, plasma storage.
3. because the linear molecular structure of DOTP is similar to DOS and DOA, its cold resistance is also better.
The volume resistivity of 4.DOTP is 10-20 times higher than that of DOP, and its mobility is excellent.
5., because DOTP does not contain o-phthalate two formate, it is not an environmental friendly plasticizer in the range of 16 16 kinds of plasticizers containing o-phthalic acid in the European Union and other countries.
Plasticizing method
There are 4 main types:
Thermal mixing: mixing plasticizer with powdered synthetic resin (including other plastic additives), and then mixing it with mixer or open mill at a certain temperature.
Dry mixing: adding plasticizer into synthetic resin powder, stirring at certain temperature, and making dry mixed powder with no difference from original synthetic resin.
Third, paste: the fine particle type synthetic resin is mixed into the plasticizer in the fully shearing mixing machine, forming stable and pour paste or slurry (see plasticizing paste processing).
(4) making solution: dissolving the synthetic resin into suitable solvent or mixed solvent, then mixing the plasticizer with adjustable solubility, that is, the plasticizer solution of synthetic resin. The first 3 methods need to be heated and need to be stirred, and the fourth methods do not need to be heated.
Because of the large amount of plasticizers and various kinds of plasticizers, the production technology of plasticizers tends to develop in two aspects. On the one hand, it is the continuous production of the main plasticizers; on the other hand, it is the batch production of the special plasticizers in many varieties and small quantities.
With the increase of PVC production and the development of petrochemical industry, plasticizer has developed into a large-scale chemical industry based on petrochemicals and o-phthalate two. Phthalate two formate accounted for more than 80% of the total plasticizer production, which provided conditions for large-scale continuous production. Because of the existence of many kinds of plasticizers and small batch plasticizers, it is necessary for the "universal" production device to be intermittent production.
In order to reduce the color of the product, improve the thermal stability of the product and further simplify the process, the non acid catalyst has been industrialized. The non acid catalyst has the advantages of less side reaction, lighter product color, simpler product purification, less waste water, better water quality, better thermal stability and higher yield.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Plasticizers can be divided into two types, that is, the internal plasticizer and the external plasticizer.
The internal plasticizer is actually a part of the polymer. The general internal plasticizer is the second monomer introduced in the polymerization process of the polymer. Because of the second monomers in the molecular structure of the polymer, the polymer chains have lower isotacticity, which reduce the crystallinity of polymer chain. For example, the vinyl chloride vinyl ester copolymer is more soft than the vinyl chloride homopolymer. The internal plasticizer has a narrow range of use temperature and must be added to the polymerization process, so the internal plasticizer is less used.
An external plasticizer is a low molecular weight compound or polymer that is added to the polymer that needs to be plasticized, which can increase the plasticity of the polymer. An external plasticizer is usually a highly boiling liquid or a low melting point solid, and most of them are organic compounds. Usually, they do not react with polymers. The interaction with polymers is mainly due to swelling at elevated temperatures, forming a solid solution with polymers.
The external plasticizer has more comprehensive performance and convenient production and use, and is widely used. Generally speaking, plasticizers are external plasticizers. The adjacent benzene two formic acid two ester (DOP) and dibutyl phthalate (DBP) are outside the plasticizer. In order to meet the actual requirements, it should be compatible, durable, machinability, safe and economical.
Internal plasticizers and external plasticizers have increased rapidly in recent years, and are widely used. Internal plasticizers and external plasticizers are commonly used in all aspects of national life.
Plasticizer (Plasticizers), or plasticizer, plasticizer, is a kind of soft characteristics such as material additives. It is not only used in the production of plastic products, but also in a part of concrete, wall plaster, cement and gypsum. The effects of plasticizers are different in different materials. In plastic, it can make the plastic more soft, flexible, flexible, and more durable.
There are many kinds of plasticizers, but the most commonly used are DEHP[, two phthalic acid two (2- ethyl hexyl) ester. It is mainly used in PVC (polyvinyl chloride) plastic products, such as fresh-keeping film, food packaging, toys and so on. A lot of medical plastics, such as catheters, infusion bags and so on, also contain this kind of material. It has a wide range of changes in the content of plastic products, from 1% to 40%.
DEHP does not use a solid covalent bond in plastic, it is easier to get out of the plastic and enter the environment or the human body.
Two octyl terephthalate (plasticizer DOTP) raw materials are generally synthesized from the process route of terephthalic acid or two methyl terephthalate as raw material.
Safety data for export goods of two octyl terephthalate (plasticizer DOTP)
CAS No.:6422-86-2
State of the goods: export by general goods.
Use of two octyl terephthalate (plasticizer DOTP)
1.DOTP has good electrical and thermal properties. It can be used to replace DOP in the sheath of PVC plastic wire and can also be used in the production of artificial leather membrane. In addition, with excellent compatibility, terephthalic acid ester is two PVC acrylonitrile derivatives plastic plasticizer, plasticizer, plasticizer, polyvinyl butyral nitrile rubber plasticizer, plasticizer for cellulose nitrate. The improvement of the product and plays the role of hardness and deformation, can be used as softener in NBR, chloroprene rubber, EPDM rubber and other products three. Especially for cable material, it has good plasticizing effect and low volatility. It is widely used in various products that require heat resistance and high insulation. It is an ideal plasticizer for producing 70 PVC cable material and other volatile resistant products.
2.DOTP is used for the PVC products in the car, which can solve the fog problem of the glass window. DOTP is also used for high quality lubricants or lubricant additives furniture and interior decoration paint, and precision instruments, nitro varnish additives, paper softener, biaxially oriented polyester amide membrane film, plastic bags and other crafts, plasma storage.
3. because the linear molecular structure of DOTP is similar to DOS and DOA, its cold resistance is also better.
The volume resistivity of 4.DOTP is 10-20 times higher than that of DOP, and its mobility is excellent.
5., because DOTP does not contain o-phthalate two formate, it is not an environmental friendly plasticizer in the range of 16 16 kinds of plasticizers containing o-phthalic acid in the European Union and other countries.
Plasticizing method
There are 4 main types:
Thermal mixing: mixing plasticizer with powdered synthetic resin (including other plastic additives), and then mixing it with mixer or open mill at a certain temperature.
Dry mixing: adding plasticizer into synthetic resin powder, stirring at certain temperature, and making dry mixed powder with no difference from original synthetic resin.
Third, paste: the fine particle type synthetic resin is mixed into the plasticizer in the fully shearing mixing machine, forming stable and pour paste or slurry (see plasticizing paste processing).
(4) making solution: dissolving the synthetic resin into suitable solvent or mixed solvent, then mixing the plasticizer with adjustable solubility, that is, the plasticizer solution of synthetic resin. The first 3 methods need to be heated and need to be stirred, and the fourth methods do not need to be heated.
Because of the large amount of plasticizers and various kinds of plasticizers, the production technology of plasticizers tends to develop in two aspects. On the one hand, it is the continuous production of the main plasticizers; on the other hand, it is the batch production of the special plasticizers in many varieties and small quantities.
With the increase of PVC production and the development of petrochemical industry, plasticizer has developed into a large-scale chemical industry based on petrochemicals and o-phthalate two. Phthalate two formate accounted for more than 80% of the total plasticizer production, which provided conditions for large-scale continuous production. Because of the existence of many kinds of plasticizers and small batch plasticizers, it is necessary for the "universal" production device to be intermittent production.
In order to reduce the color of the product, improve the thermal stability of the product and further simplify the process, the non acid catalyst has been industrialized. The non acid catalyst has the advantages of less side reaction, lighter product color, simpler product purification, less waste water, better water quality, better thermal stability and higher yield.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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