News Details
Universal plasticizer
2017-12-22 11:39:47
Universal plasticizer
For most applications, plasticizers, the plasticizers known as the GP type, are the first plasticizers to be considered when developing the required formula.
The universal plasticizer has a balanced performance characteristic, which has proved to be suitable for many applications and production processes and can be obtained in large quantities in the market. The general-purpose plasticizer accounts for about 85% of all plasticizers, and continues to grow at a rate that is slightly higher than the global GNP (GNP) each year.
The consumption of general-purpose plasticizers in 2007 was estimated to be 4000kt. General-purpose plasticizers are usually the lowest price plasticizers.
In North America, there are 4 kinds of plasticizers are divided into general type: phthalate two formic acid isoamyl ester two (DIHP), two formic acid and two phthalate isononyl ester (DINP) phthalate two formic acid and two isodecyl phthalate (DIDP) and two formic acid two -2- ethyl ester (DEHP) also known as adjacent benzene two formic acid two ester (DOP). A few years ago, the C7~C11 linear chain two alkyl esters of o-benzoic acid two were also on the list, but their cost structure changed, so they no longer belong to universal plasticizers.
In many parts of the world, DEHP is still regarded as a universal plasticizer. However, with the increasing demand for labels and concerns, DEHP is not as popular in the US and Western Europe as it used to be.
As a result, manufacturers in the United States and Europe no longer use DEHP as a general-purpose plasticizer. Some users may also remove other plasticizers from the list of general general-purpose plasticizers because of production constraints. For example, DIDP is seldom used as a general plasticizer in plasticizer operation due to its shortcomings in processing, such as requiring high melting temperature or processing temperature.
People may find traces of plasticizers in some plasticizers, but they are usually used in conjunction with fast melt plasticizers such as BBP or low molecular weight two phthalate esters, two benzoates or citric esters to ensure the smooth processing. The selection of plasticizers most suitable for certain specific uses from these four general-purpose plasticizers depends on their physical properties and processing capacity. According to the requirement of plasticizer, it tends to remove the plasticizer, DIDP, which has less solubility.
It is almost always preferable to choose C10 phthalate two formate DIDP if it is required to have low volatility or higher overall performance during the process.
The universal plasticizer DINP provides the best balance between processability, durability, overall performance and low cost. Therefore, DINP is always preferred as the starting point for the selection of universal plasticizers. The volatility of various plasticizers, including general plasticizers, was compared.
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.
Packing method:
200KG/ net galvanized steel drum (a small pallet loaded 16 tons), 1000KG/IB (a small barrel loaded 18 tons or 23 tons of ISOTANK).
The relationship between the hardness of the plasticizer and the number of plasticizers has been very clear. When a new formula is developed, the properties of the product, such as hardness, are usually prescribed in advance.
Once the requirements have been determined, the curve relationship or the formula (1) based on the laboratory test of DINP system can be used to determine the number of plasticizers in the formula without filling.
Number (DINP) = (115- Shaoshi A hardness) /0.61 (1)
After estimating the number of DINP plasticizers according to the required hardness, the relative substitution coefficient (SF) can be used to determine the number of other plasticizers needed to achieve the same hardness.
These coefficients are the ratio of the number of plasticizers to the number of DEHP portions to reach 80 of the hardness of the Shaoshi A. Table 1 lists the SF values of most commonly used PVC plasticizers. The following examples are given to illustrate how to use these coefficients. For example, it is assumed that the hardness of the Shaw A84 needs 50 copies of DINP to reach the hardness of the Shaw A84. In order to transform this value into the value of DIDP formula, we can use DINP's SF (1.06) and DIDP's SF (1.10) to calculate the number of DIDP needed to achieve the same hardness according to the formula (2).
Number (DIDP) =50 portion (DINP) x 1.10/1.06=52 DIDP (2)
So, using 52 copies of DIDP and 50 copies of DINP can achieve the same hardness of the Shaw A 84. Other more extensive computer tools have been proved to be available for such calculations, not only for the hardness of the Shaw, but also for various physical properties. One of them is the COPPCOSM[1] simulation program developed by Exxon Mobil.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
For most applications, plasticizers, the plasticizers known as the GP type, are the first plasticizers to be considered when developing the required formula.
The universal plasticizer has a balanced performance characteristic, which has proved to be suitable for many applications and production processes and can be obtained in large quantities in the market. The general-purpose plasticizer accounts for about 85% of all plasticizers, and continues to grow at a rate that is slightly higher than the global GNP (GNP) each year.
The consumption of general-purpose plasticizers in 2007 was estimated to be 4000kt. General-purpose plasticizers are usually the lowest price plasticizers.
In North America, there are 4 kinds of plasticizers are divided into general type: phthalate two formic acid isoamyl ester two (DIHP), two formic acid and two phthalate isononyl ester (DINP) phthalate two formic acid and two isodecyl phthalate (DIDP) and two formic acid two -2- ethyl ester (DEHP) also known as adjacent benzene two formic acid two ester (DOP). A few years ago, the C7~C11 linear chain two alkyl esters of o-benzoic acid two were also on the list, but their cost structure changed, so they no longer belong to universal plasticizers.
In many parts of the world, DEHP is still regarded as a universal plasticizer. However, with the increasing demand for labels and concerns, DEHP is not as popular in the US and Western Europe as it used to be.
As a result, manufacturers in the United States and Europe no longer use DEHP as a general-purpose plasticizer. Some users may also remove other plasticizers from the list of general general-purpose plasticizers because of production constraints. For example, DIDP is seldom used as a general plasticizer in plasticizer operation due to its shortcomings in processing, such as requiring high melting temperature or processing temperature.
People may find traces of plasticizers in some plasticizers, but they are usually used in conjunction with fast melt plasticizers such as BBP or low molecular weight two phthalate esters, two benzoates or citric esters to ensure the smooth processing. The selection of plasticizers most suitable for certain specific uses from these four general-purpose plasticizers depends on their physical properties and processing capacity. According to the requirement of plasticizer, it tends to remove the plasticizer, DIDP, which has less solubility.
It is almost always preferable to choose C10 phthalate two formate DIDP if it is required to have low volatility or higher overall performance during the process.
The universal plasticizer DINP provides the best balance between processability, durability, overall performance and low cost. Therefore, DINP is always preferred as the starting point for the selection of universal plasticizers. The volatility of various plasticizers, including general plasticizers, was compared.
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.
Packing method:
200KG/ net galvanized steel drum (a small pallet loaded 16 tons), 1000KG/IB (a small barrel loaded 18 tons or 23 tons of ISOTANK).
The relationship between the hardness of the plasticizer and the number of plasticizers has been very clear. When a new formula is developed, the properties of the product, such as hardness, are usually prescribed in advance.
Once the requirements have been determined, the curve relationship or the formula (1) based on the laboratory test of DINP system can be used to determine the number of plasticizers in the formula without filling.
Number (DINP) = (115- Shaoshi A hardness) /0.61 (1)
After estimating the number of DINP plasticizers according to the required hardness, the relative substitution coefficient (SF) can be used to determine the number of other plasticizers needed to achieve the same hardness.
These coefficients are the ratio of the number of plasticizers to the number of DEHP portions to reach 80 of the hardness of the Shaoshi A. Table 1 lists the SF values of most commonly used PVC plasticizers. The following examples are given to illustrate how to use these coefficients. For example, it is assumed that the hardness of the Shaw A84 needs 50 copies of DINP to reach the hardness of the Shaw A84. In order to transform this value into the value of DIDP formula, we can use DINP's SF (1.06) and DIDP's SF (1.10) to calculate the number of DIDP needed to achieve the same hardness according to the formula (2).
Number (DIDP) =50 portion (DINP) x 1.10/1.06=52 DIDP (2)
So, using 52 copies of DIDP and 50 copies of DINP can achieve the same hardness of the Shaw A 84. Other more extensive computer tools have been proved to be available for such calculations, not only for the hardness of the Shaw, but also for various physical properties. One of them is the COPPCOSM[1] simulation program developed by Exxon Mobil.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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