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Auxiliary class plasticizer
2017-12-23 11:38:49
Auxiliary class plasticizer
A plasticizer is a kind of plasticizer added to the soft PVC formula at a dose lower than the main plasticizer. In general, auxiliary plasticizers are used to improve some properties of universal plasticizers or to help reduce costs. Adding the auxiliary plasticizer to improve the formulation is usually aimed at improving low temperature flexibility, improving processability, reducing melting temperature or improving flammability.
The effect of the auxiliary plasticizer on the low temperature performance. Sometimes the performance of the general-purpose plasticizer does not fully meet the customer's performance requirements. For example, the brittle temperature of a 50 DINP formula is Tb at -32 C. If the product specifications require Tb to be -36 C, the formula needs to be modified.
Though the increase of DINP number to 57 parts can reduce Tb to the required target value, the hardness will be reduced from 84 to 80, which may not be acceptable in terms of overall performance or cost. The use of poor compatibility plasticizers, such as mineral oils or alkane plasticizers, can improve low temperature performance and help reduce total cost.
In this case, if the plasticizer for 2.5 alkanes (such as JayflexTM210) to replace 1.5 copies of DINP 50 copies of the product in the Tb can be reduced to -36 DEG C, and can maintain the desired hardness. However, some other properties, such as volatility or adhesiveness, may begin to deteriorate with the increase in the number of such plasticizers.
Another way to improve low temperature performance is to use low temperature plasticizers, such as adipic acid, two -2- ethylhexyl ester (DEHA) or adipic two ISO nonyl ester (DINA) as auxiliary plasticizers and main plasticizers.
For example, replacing 8 copies of DINP in the above formula with 7 copies of DINA will reduce Tb to -36 C and keep the hardness of 84. Please note that only a small amount of DINA can replace the part DINP to keep the hardness unchanged. This is because the efficiency of DINA is higher, which can be verified by its lower SF value (SFDINA=0.98).
Improve the processability. Although some plasticizers may be known or used because of some special properties, their performance does not meet the requirements in some production operations.
For example, as a non ortho two carboxylate plasticizer, the dissolution temperature of cyclohexanol carboxylate C9 (DINCH) is higher than that of DIDP and DINP, but their processability is not so good in plasticizing sol or other operations.
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).
In order to improve performance, the usual practice is to use a fast melt plasticizer with a amount of about 10%~30% as an auxiliary plasticizer. Because the sole purpose of using cyclohexyl carboxylic plasticizers is to provide a system of non ortho two carboxylates, so the selected fast melt plasticizer must also be a non o-phenyl two formate.
A suitable rapid melt plasticizer for non - o-phthalic acid esters should be citrate ATBC, alkyl sulfonate or two benzoate two propanediol ester. In order to improve the processability of the phthalate two formate system, the plasticizer with lower relative molecular weight can be added to the phthalate ester.
Krauskopf has shown that in the series of plasticizers of the same chemical category, the dry mixing time increases with the increase of the plasticizer viscosity. For example, the dry mixing time of DINP is shorter than that of DIDP, and the dry mixing time of C9 straight chain phthalate ester is shorter than that of branched chain C8 or C9 phthalate ester.
At the same viscosity, the dry mixing time of phthalate ester is shorter than that of adipate. In general, if dry mixing is indeed a problem, the use of low molecular weight plasticizers or low viscosity plasticizers will help to improve dry mixing. The easier way is to improve the temperature before the plasticizer is added to the mixer, which will help to improve the dry mixing of the mixture.
Improve the flame retardancy. Although PVC itself is flame retardant, it can improve its combustibility after adding plasticizer to the polymer. The function of the plasticizer at this time is equivalent to a kind of fuel, which will support the combustion.
The general way to reduce flammability of soft products is to replace phosphate ester plasticizer with some main components of o-phthalate two plasticizer, brominating plasticizer such as four bromine DEHP, or by using hydrated minerals, chlorinated paraffin, zinc borate or antimony oxide.
According to Moy[6] reports, for 50 DIDP soft PVC formulations (containing 6 antimony oxide), if the phosphate ester (isopropyl phenyl two phenyl ester) instead of 50% of DIDP, its LOI (limit oxygen index) can be increased from 29.8% to 31.2%. In the same basic formula, LOI will increase to 32.9% when DIDP is replaced with phosphate 100%.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
A plasticizer is a kind of plasticizer added to the soft PVC formula at a dose lower than the main plasticizer. In general, auxiliary plasticizers are used to improve some properties of universal plasticizers or to help reduce costs. Adding the auxiliary plasticizer to improve the formulation is usually aimed at improving low temperature flexibility, improving processability, reducing melting temperature or improving flammability.
The effect of the auxiliary plasticizer on the low temperature performance. Sometimes the performance of the general-purpose plasticizer does not fully meet the customer's performance requirements. For example, the brittle temperature of a 50 DINP formula is Tb at -32 C. If the product specifications require Tb to be -36 C, the formula needs to be modified.
Though the increase of DINP number to 57 parts can reduce Tb to the required target value, the hardness will be reduced from 84 to 80, which may not be acceptable in terms of overall performance or cost. The use of poor compatibility plasticizers, such as mineral oils or alkane plasticizers, can improve low temperature performance and help reduce total cost.
In this case, if the plasticizer for 2.5 alkanes (such as JayflexTM210) to replace 1.5 copies of DINP 50 copies of the product in the Tb can be reduced to -36 DEG C, and can maintain the desired hardness. However, some other properties, such as volatility or adhesiveness, may begin to deteriorate with the increase in the number of such plasticizers.
Another way to improve low temperature performance is to use low temperature plasticizers, such as adipic acid, two -2- ethylhexyl ester (DEHA) or adipic two ISO nonyl ester (DINA) as auxiliary plasticizers and main plasticizers.
For example, replacing 8 copies of DINP in the above formula with 7 copies of DINA will reduce Tb to -36 C and keep the hardness of 84. Please note that only a small amount of DINA can replace the part DINP to keep the hardness unchanged. This is because the efficiency of DINA is higher, which can be verified by its lower SF value (SFDINA=0.98).
Improve the processability. Although some plasticizers may be known or used because of some special properties, their performance does not meet the requirements in some production operations.
For example, as a non ortho two carboxylate plasticizer, the dissolution temperature of cyclohexanol carboxylate C9 (DINCH) is higher than that of DIDP and DINP, but their processability is not so good in plasticizing sol or other operations.
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).
In order to improve performance, the usual practice is to use a fast melt plasticizer with a amount of about 10%~30% as an auxiliary plasticizer. Because the sole purpose of using cyclohexyl carboxylic plasticizers is to provide a system of non ortho two carboxylates, so the selected fast melt plasticizer must also be a non o-phenyl two formate.
A suitable rapid melt plasticizer for non - o-phthalic acid esters should be citrate ATBC, alkyl sulfonate or two benzoate two propanediol ester. In order to improve the processability of the phthalate two formate system, the plasticizer with lower relative molecular weight can be added to the phthalate ester.
Krauskopf has shown that in the series of plasticizers of the same chemical category, the dry mixing time increases with the increase of the plasticizer viscosity. For example, the dry mixing time of DINP is shorter than that of DIDP, and the dry mixing time of C9 straight chain phthalate ester is shorter than that of branched chain C8 or C9 phthalate ester.
At the same viscosity, the dry mixing time of phthalate ester is shorter than that of adipate. In general, if dry mixing is indeed a problem, the use of low molecular weight plasticizers or low viscosity plasticizers will help to improve dry mixing. The easier way is to improve the temperature before the plasticizer is added to the mixer, which will help to improve the dry mixing of the mixture.
Improve the flame retardancy. Although PVC itself is flame retardant, it can improve its combustibility after adding plasticizer to the polymer. The function of the plasticizer at this time is equivalent to a kind of fuel, which will support the combustion.
The general way to reduce flammability of soft products is to replace phosphate ester plasticizer with some main components of o-phthalate two plasticizer, brominating plasticizer such as four bromine DEHP, or by using hydrated minerals, chlorinated paraffin, zinc borate or antimony oxide.
According to Moy[6] reports, for 50 DIDP soft PVC formulations (containing 6 antimony oxide), if the phosphate ester (isopropyl phenyl two phenyl ester) instead of 50% of DIDP, its LOI (limit oxygen index) can be increased from 29.8% to 31.2%. In the same basic formula, LOI will increase to 32.9% when DIDP is replaced with phosphate 100%.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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