News Details
PVC coating plasticizer
2017-12-20 11:55:08
PVC coating plasticizer
The role of PVC coating plasticizer is to increase the softness of the coating. Plasticizers are essential for some coating materials that are brittle and have good softness and other mechanical properties.
PVC coating plasticizers are usually low molecular weight volatile organic compounds, but some polymer resins can also be used as plasticizers (also known as plasticized resins), such as alkyd resins, often used as plasticized resins for chlorinated rubber and nitrocellulose coatings. Both plasticizer and plasticizer must have better compatibility with the plasticized resin.
PVC coating plasticizer should be low toxicity. While increasing the flexibility of the coating, it should reduce the hardness of the coating as little as possible, and not change the color of the coating, especially when the coating is used outdoors. The types and dosage of plasticizers vary according to the difference in the resin of the base material in the coating and the requirements for the use of the coatings.
The plasticizing effect of the plasticizer is achieved by reducing the vitrification temperature of the base resin (Tg).
The vitrification temperature (Tg) is the transition temperature of the resin from a hard brittle solid state (glass state) to a rubber like high projectile state (high elastic state). Plasticizers can usually be divided into two types. One type is the main plasticizer (solvent plasticizer), the other is a plasticizer (non solvent plasticizer).
The main plasticizer is like a solvent of base resin. Some of their groups can interact with some groups in the resin, so the main plasticizer and resin can intermix with each other.
Because plasticizer molecules are small, it can enter the molecular structure of resin polymers and reduce the rigidity of resin, but the addition of plasticizers will also cause some loss of mechanical properties of coatings.
The plasticizers do not dissolve the base resin, and they can be mixed with the base resin only if they are not too much added. The plasticizer has only physical function (lubrication) on the base resin, and the effect on the mechanical strength of the coating is not as large as the main plasticizer. But the plasticizer is easy to migrate or infiltrate from the coating, which makes the flexibility of the coating worse.
The addition of plasticizers in coatings has a certain influence on many properties of the coating, such as tensile strength, strength and toughness, extensibility, permeability and adhesion. According to the different types of polymer and plasticizer, the effects on these properties are different. In general, the addition of plasticizers will increase the extensibility of the coating and reduce its tensile strength.
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).
Within a certain amount of plasticizer, the permeability of the coating will remain basically unchanged, but when the plasticizer dosage continues to increase, the permeability of the coating will increase dramatically. The strength and adhesion of the film increase first with the addition of the plasticizer, but it decreases gradually after reaching a peak. In addition to affecting the mechanical properties of the coating, plasticizer will also affect some other properties of the coating. Therefore, the most appropriate amount of plasticizer should be comprehensively balanced according to the consideration of various factors, and later determined.
The following is a brief introduction to some plasticizers commonly used in the coatings.
1. synthetic plant ester is a completely environment-friendly, non-toxic plasticizer. It has good solubilitywith all kinds of resins, and is widely applied in coatings. The synthetic plant ester has smaller yellowing tendency to paint film, low volatility, good light resistance and heat resistance. It is commonly used in nitrocellulose coatings, PVC plastic sol, organo sol coatings and chlorinated rubber coatings. If the synthesis of ester and dibutyl phthalate (DBP) plant or adjacent benzene two formic acid two ester (DOP) mixed use, than the three alone with better results.
Dibutyl phthalate (DBP) 2. this plasticizer of resin has good compatibility, so it is widely used in coatings. The yellowing tendency of dibutyl phthalate on film is small, but it's not very low volatile.
It is a weakness because of the gradual reduction of plasticizer. Commonly used in coatings and dibutyl phthalate cellulose nitrate polyvinyl acetate emulsion paint etc..
3. adjacent benzene two formic acid two ester (DOP) and its performance is similar to the DBP, but it is less volatile, light resistance and good heat resistance. It is often used in nitrocellulose coatings and polyvinyl chloride plastic sol and organic sol coatings.
4. chlorinated paraffin paraffin wax is mainly used as a plasticizer for chlorinated rubber paint. Its addition amount can reach 50%, and it will not make the chemical resistance of chlorinated rubber coating worse.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
The role of PVC coating plasticizer is to increase the softness of the coating. Plasticizers are essential for some coating materials that are brittle and have good softness and other mechanical properties.
PVC coating plasticizers are usually low molecular weight volatile organic compounds, but some polymer resins can also be used as plasticizers (also known as plasticized resins), such as alkyd resins, often used as plasticized resins for chlorinated rubber and nitrocellulose coatings. Both plasticizer and plasticizer must have better compatibility with the plasticized resin.
PVC coating plasticizer should be low toxicity. While increasing the flexibility of the coating, it should reduce the hardness of the coating as little as possible, and not change the color of the coating, especially when the coating is used outdoors. The types and dosage of plasticizers vary according to the difference in the resin of the base material in the coating and the requirements for the use of the coatings.
The plasticizing effect of the plasticizer is achieved by reducing the vitrification temperature of the base resin (Tg).
The vitrification temperature (Tg) is the transition temperature of the resin from a hard brittle solid state (glass state) to a rubber like high projectile state (high elastic state). Plasticizers can usually be divided into two types. One type is the main plasticizer (solvent plasticizer), the other is a plasticizer (non solvent plasticizer).
The main plasticizer is like a solvent of base resin. Some of their groups can interact with some groups in the resin, so the main plasticizer and resin can intermix with each other.
Because plasticizer molecules are small, it can enter the molecular structure of resin polymers and reduce the rigidity of resin, but the addition of plasticizers will also cause some loss of mechanical properties of coatings.
The plasticizers do not dissolve the base resin, and they can be mixed with the base resin only if they are not too much added. The plasticizer has only physical function (lubrication) on the base resin, and the effect on the mechanical strength of the coating is not as large as the main plasticizer. But the plasticizer is easy to migrate or infiltrate from the coating, which makes the flexibility of the coating worse.
The addition of plasticizers in coatings has a certain influence on many properties of the coating, such as tensile strength, strength and toughness, extensibility, permeability and adhesion. According to the different types of polymer and plasticizer, the effects on these properties are different. In general, the addition of plasticizers will increase the extensibility of the coating and reduce its tensile strength.
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).
Within a certain amount of plasticizer, the permeability of the coating will remain basically unchanged, but when the plasticizer dosage continues to increase, the permeability of the coating will increase dramatically. The strength and adhesion of the film increase first with the addition of the plasticizer, but it decreases gradually after reaching a peak. In addition to affecting the mechanical properties of the coating, plasticizer will also affect some other properties of the coating. Therefore, the most appropriate amount of plasticizer should be comprehensively balanced according to the consideration of various factors, and later determined.
The following is a brief introduction to some plasticizers commonly used in the coatings.
1. synthetic plant ester is a completely environment-friendly, non-toxic plasticizer. It has good solubilitywith all kinds of resins, and is widely applied in coatings. The synthetic plant ester has smaller yellowing tendency to paint film, low volatility, good light resistance and heat resistance. It is commonly used in nitrocellulose coatings, PVC plastic sol, organo sol coatings and chlorinated rubber coatings. If the synthesis of ester and dibutyl phthalate (DBP) plant or adjacent benzene two formic acid two ester (DOP) mixed use, than the three alone with better results.
Dibutyl phthalate (DBP) 2. this plasticizer of resin has good compatibility, so it is widely used in coatings. The yellowing tendency of dibutyl phthalate on film is small, but it's not very low volatile.
It is a weakness because of the gradual reduction of plasticizer. Commonly used in coatings and dibutyl phthalate cellulose nitrate polyvinyl acetate emulsion paint etc..
3. adjacent benzene two formic acid two ester (DOP) and its performance is similar to the DBP, but it is less volatile, light resistance and good heat resistance. It is often used in nitrocellulose coatings and polyvinyl chloride plastic sol and organic sol coatings.
4. chlorinated paraffin paraffin wax is mainly used as a plasticizer for chlorinated rubber paint. Its addition amount can reach 50%, and it will not make the chemical resistance of chlorinated rubber coating worse.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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