News Details
Plasticizers of polyvinyl chloride (PVC) resin
2017-12-20 11:55:19
Plasticizers of polyvinyl chloride (PVC) resin
Polyvinyl chloride (PVC) is the most processed plastic variety in China. Among the various auxiliaries used for processing PVC, the amount of plasticizers is the largest.
The investment of polyvinyl chloride (PVC) resin plasticizer is much higher than that of other additives. Even in some soft material formulations, the investment of PVC resin is more than the main raw material. It is of great economic and social significance to study and discuss the use of polyvinyl chloride (PVC) resin plasticizer in the present situation of economic benefit and product quality.
The selection of polyvinyl chloride (PVC) resin plasticizer. Polyvinyl chloride is a kind of strong polar polymer. There is a great force between molecules. It is necessary to heat a certain temperature to show the plasticity. It is sensitive to heat. When heated to 130~140 "C, it begins to break down seriously. It becomes brown or black. The strong forces made by the molecules make the products hard and lack flexibility and flexibility.
The role of plasticizer is to weaken the interaction force between PVC molecules, so as to reduce the softening temperature, reduce the viscosity of the solution, increase its fluidity, and improve the processability and flexibility of PVC products. The plasticized Vitex is usually a highly volatile high boiling point ester. A few are low melting points. They are generally not chemically reacted with the polymer (PVC).
There are different classification methods of plasticized Vitex. The common classification methods are classified according to chemical structure, application performance, molecular weight, adding way, solubility, compatibility and toxicity.
Plasticizer usage conditions are of good compatibility with resin; low cost; high plasticizing efficiency; plasticizing speed; good durability (low volatility, Yi moving small. High resistance to extraction); good environmental stability (heat and light resistance, bacteria, chemical resistance and flame retardant good); good health (human, livestock and crops, no pollution, non-toxic and tasteless); good insulation; good viscosity stability.
However, no plasticizer can satisfy all the conditions. Most of the plasticizers are made up of two or more combinations to get the best plasticizing effect and achieve perfect performance requirements.
Plasticizer is selected in a formula. It is impossible to make all the properties of the product reach the best value. Therefore, first of all, the main performance requirements should be guaranteed when selecting plasticizer. The main performance such as children's toys and food packaging requirements such as non-toxic, beautiful appearance quality requirements; plastic sheeting is harmless to crops, light and heat; and the main requirements of the cable material is good insulation and so on, in addition to these requirements, the plastic should also increase Jing factors again consider the following 5 aspects. The plasticizer Jing itself; the properties of PVC resin products; performance requirements; increase the processing adaptability of plasticizers: cost.
Two octyl terephthalate (plasticizer DOTP) information:
Shipping port: Shanghai port
Price quotation validity: 15 days
Entry time: 15 days (inspection declaration)
Export authority: the company's right to import and export
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.
In addition, the properties of the plasticized wattle are considered. The phase solubility is the most important for the plasticized wattle. It is the basic factor that must be taken into consideration when selecting the plasticized wattle. The plasticizer has good compatibility with the resin, and the plasticizer has high plasticizing efficiency. The plasticizer does not segregate and does not exudate. The flexibility of the products is good and the service life is long.
Compatibility refers to two or more substances in the mix of mutual affinity, i.e. molecular compatibility, good compatibility to form a homogeneous mixture system. In the production practice, the compatibility of the plasticizer in the polymer is determined mainly by the coordination test and experience. The simple way to evaluate compatibility is to mix the plasticized Vitex, resin and the appropriate solvent in a certain proportion.
A uniform delay modulation solution flow into thin film and its transparent observation to judge. The film has good compatibility. The homogeneous transparent representation of fuzzy mean poor compatibility. Another method of plasticizer and PVC resin are mixed according to a certain proportion. The uniform heating plasticization after cooling to room temperature. The observation surface no exudate. No plasticizer exudation shows good solubility, exudation of plasticizer is more that the worse the compatibility. According to the general rule.
The more close the polarity is, the easier to dissolve. Therefore, the solubility parameter of the plasticized wattle is closer to the solubility parameter of the resin. The better the compatibility is. The dielectric constant is a function of the molecular polarity, which is greatly influenced by the dipole moment and the hydrogen bond.
The dielectric constant can be used as a parameter to judge the compatibility of the plasticized wattle. According to the results of the research on PVC, the solubility parameters of the plasticized Vitex are generally selected from 8.4 to 11.4. The compatibility of dielectric constant from 4 to 8. is ideal.
The bulk polymerization process is polymerized without water, dispersant and initiator. No post-processing equipment is needed. The investment is small, energy saving and low cost. The products produced by PVC resin are high transparency, good electrical insulation and easy to process. The equipment used for processing suspension resin can be used for processing bulk resin. The PVC technology has been greatly developed in 80s.
However, although theoretically the suspension and bulk polymerization resin reaction process can be used in the same field, actually processing plants generally used only one of them, because the suspension and bulk resin can not be mixed, even a small amount of liquidity will be mixed polymer powder is reduced due to the electrostatic effect and lead to more easily obtained by suspension polymerization resin therefore, most processing plants give up the body resin, in recent years there have been stalled or state of recession process ontology.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Polyvinyl chloride (PVC) is the most processed plastic variety in China. Among the various auxiliaries used for processing PVC, the amount of plasticizers is the largest.
The investment of polyvinyl chloride (PVC) resin plasticizer is much higher than that of other additives. Even in some soft material formulations, the investment of PVC resin is more than the main raw material. It is of great economic and social significance to study and discuss the use of polyvinyl chloride (PVC) resin plasticizer in the present situation of economic benefit and product quality.
The selection of polyvinyl chloride (PVC) resin plasticizer. Polyvinyl chloride is a kind of strong polar polymer. There is a great force between molecules. It is necessary to heat a certain temperature to show the plasticity. It is sensitive to heat. When heated to 130~140 "C, it begins to break down seriously. It becomes brown or black. The strong forces made by the molecules make the products hard and lack flexibility and flexibility.
The role of plasticizer is to weaken the interaction force between PVC molecules, so as to reduce the softening temperature, reduce the viscosity of the solution, increase its fluidity, and improve the processability and flexibility of PVC products. The plasticized Vitex is usually a highly volatile high boiling point ester. A few are low melting points. They are generally not chemically reacted with the polymer (PVC).
There are different classification methods of plasticized Vitex. The common classification methods are classified according to chemical structure, application performance, molecular weight, adding way, solubility, compatibility and toxicity.
Plasticizer usage conditions are of good compatibility with resin; low cost; high plasticizing efficiency; plasticizing speed; good durability (low volatility, Yi moving small. High resistance to extraction); good environmental stability (heat and light resistance, bacteria, chemical resistance and flame retardant good); good health (human, livestock and crops, no pollution, non-toxic and tasteless); good insulation; good viscosity stability.
However, no plasticizer can satisfy all the conditions. Most of the plasticizers are made up of two or more combinations to get the best plasticizing effect and achieve perfect performance requirements.
Plasticizer is selected in a formula. It is impossible to make all the properties of the product reach the best value. Therefore, first of all, the main performance requirements should be guaranteed when selecting plasticizer. The main performance such as children's toys and food packaging requirements such as non-toxic, beautiful appearance quality requirements; plastic sheeting is harmless to crops, light and heat; and the main requirements of the cable material is good insulation and so on, in addition to these requirements, the plastic should also increase Jing factors again consider the following 5 aspects. The plasticizer Jing itself; the properties of PVC resin products; performance requirements; increase the processing adaptability of plasticizers: cost.
Two octyl terephthalate (plasticizer DOTP) information:
Shipping port: Shanghai port
Price quotation validity: 15 days
Entry time: 15 days (inspection declaration)
Export authority: the company's right to import and export
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.
In addition, the properties of the plasticized wattle are considered. The phase solubility is the most important for the plasticized wattle. It is the basic factor that must be taken into consideration when selecting the plasticized wattle. The plasticizer has good compatibility with the resin, and the plasticizer has high plasticizing efficiency. The plasticizer does not segregate and does not exudate. The flexibility of the products is good and the service life is long.
Compatibility refers to two or more substances in the mix of mutual affinity, i.e. molecular compatibility, good compatibility to form a homogeneous mixture system. In the production practice, the compatibility of the plasticizer in the polymer is determined mainly by the coordination test and experience. The simple way to evaluate compatibility is to mix the plasticized Vitex, resin and the appropriate solvent in a certain proportion.
A uniform delay modulation solution flow into thin film and its transparent observation to judge. The film has good compatibility. The homogeneous transparent representation of fuzzy mean poor compatibility. Another method of plasticizer and PVC resin are mixed according to a certain proportion. The uniform heating plasticization after cooling to room temperature. The observation surface no exudate. No plasticizer exudation shows good solubility, exudation of plasticizer is more that the worse the compatibility. According to the general rule.
The more close the polarity is, the easier to dissolve. Therefore, the solubility parameter of the plasticized wattle is closer to the solubility parameter of the resin. The better the compatibility is. The dielectric constant is a function of the molecular polarity, which is greatly influenced by the dipole moment and the hydrogen bond.
The dielectric constant can be used as a parameter to judge the compatibility of the plasticized wattle. According to the results of the research on PVC, the solubility parameters of the plasticized Vitex are generally selected from 8.4 to 11.4. The compatibility of dielectric constant from 4 to 8. is ideal.
The bulk polymerization process is polymerized without water, dispersant and initiator. No post-processing equipment is needed. The investment is small, energy saving and low cost. The products produced by PVC resin are high transparency, good electrical insulation and easy to process. The equipment used for processing suspension resin can be used for processing bulk resin. The PVC technology has been greatly developed in 80s.
However, although theoretically the suspension and bulk polymerization resin reaction process can be used in the same field, actually processing plants generally used only one of them, because the suspension and bulk resin can not be mixed, even a small amount of liquidity will be mixed polymer powder is reduced due to the electrostatic effect and lead to more easily obtained by suspension polymerization resin therefore, most processing plants give up the body resin, in recent years there have been stalled or state of recession process ontology.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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