News Details
4 fluorine paint crosslinking agent
2017-5-3 16:26:27
4 fluorine paint crosslinking agent. China's economy continues to grow rapidly, providing extensive market space for the application of four-fluorine coatings.
Room temperature crosslinking type four fluorine coating keep conventional fluoride coating excellent durability and stain resistance and resistance to chemical media comprehensive performance, under the condition of normal temperature drying and low temperature bake, construction excellent performance, can be widely used in high-rise buildings, large steel structure, shipbuilding and chemical construction and other fields.
The initiator used in the synthesis process has certain effect on the performance of teflon. Four fluorine resin mostly USES is abroad peroxide (e.g., SEC. Uncle amyl peroxide) as initiator, domestic products use more on azo as initiator. Peroxide caused major free radicals reaction cannot take hydrogen, easy generation linear polymer, it synthetic polymer with low viscosity, and a more uniform molecular weight distribution, four fluorine resin composite has more excellent performance.
Tetrafluoroethylene is a polymer of tetrafluoroethylene. PTFE is abbreviated in English. The basic structure of ptfe. - CF2 - CF2 - CF2 - CF2 - CF2 - CF2 - CF2 - CF2 - CF2 - CF2 -. Ptfe is widely used in all kinds of resistance to acid and alkali and organic solvent, itself has no toxic to people, but in the process of production use of the raw material of total acid ammonium (PFOA) is considered possible carcinogenic.
Ptfe relative molecular mass is bigger, for hundreds of thousands of low, high of more than ten million, generally for millions of polyethylene (degree of polymerization in 104 orders of magnitude, and only in 103). General crystallinity is 90 ~ 95%, melting temperature is 327 ~ 342 ℃. Ptfe molecular of CF2 unit in terms of the sawtooth shape due to hydrogen fluorine atom radius is larger, so the adjacent CF2 unit can't completely according to the trans cross orientation, it forms a spiral twisted chains, fluorine atoms almost covers the entire surface of the polymer chain. This molecular structure explains the various properties of ptfe. Temperature is lower than the 19 ℃, form a spiral 13/6; Phase transition in 19 ℃, molecular slightly untied, form a spiral 15/7.
Although carbon - carbon bonds in whole fluorine carbon compounds and carbon - fluorine key fracture need to absorb energy, respectively, 346.94 and 484.88 kJ/mol, but ptfe depolymerization generated 1 mol tetrafluoroethylene only energy of 171.38 kJ. So in the high temperature cracking, polytetrafluoroethylene is the main solution to the tetrafluoroethylene.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
Ptfe in 260, 370 and 420 ℃ when the weight loss rate (%) per hour, respectively 1 x 10-4, 4 x 10-3 and 9 x 10-2. Visible, ptfe at 260 ℃ for long-term use. Due to the high temperature cracking and produce toxic by-products fluorine phosgene and perfluorinated isobutylene, etc., so it is important to pay special attention to the safety and prevent the ptfe contact with open flame.
The friction coefficient of ptfe is very small, only one fifth of polyethylene, which is an important feature of fluorocarbon surface. Polytetrafluoroethylene is not viscous because of the low pressure of the fluorine carbon chain.
Ptfe in - within the wider temperature range 196 ~ 260 ℃ have excellent mechanical properties, one of the characteristics of the fluorocarbon polymer is in a constant low temperature brittle.
In addition to the molten alkali metals, ptfe is almost immune from any chemical reagent. In concentrated sulfuric acid, nitric acid, hydrochloric acid, for example, even in aqua regia to boil, its weight and performance are no change, almost insoluble in all solvents, only at above 300 ℃ is slightly soluble in total alkane (0.1 g / 100 g). Polytetrafluoroethylene is not moist, it is not burning, it is extremely stable for oxygen and uv, so it has excellent weatherability.
Ptfe is produced by free radical polymerization of teflon. The industrial polymerization is stirred by large amounts of water, which is used to disperse the heat of reaction and to control the temperature. Polymerization in 40 ~ 80 ℃, 3 ~ 26 kg/cm2 pressure, under available inorganic sulfate, organic peroxide as the initiator, also can use the REDOX initiator system. Every mole tetrafluoroethylene polymerization is 171.38 kJ. Dispersive polymerization must be added with a full fluorotype surface active agent, such as perfluoric acid or its salt.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Room temperature crosslinking type four fluorine coating keep conventional fluoride coating excellent durability and stain resistance and resistance to chemical media comprehensive performance, under the condition of normal temperature drying and low temperature bake, construction excellent performance, can be widely used in high-rise buildings, large steel structure, shipbuilding and chemical construction and other fields.
The initiator used in the synthesis process has certain effect on the performance of teflon. Four fluorine resin mostly USES is abroad peroxide (e.g., SEC. Uncle amyl peroxide) as initiator, domestic products use more on azo as initiator. Peroxide caused major free radicals reaction cannot take hydrogen, easy generation linear polymer, it synthetic polymer with low viscosity, and a more uniform molecular weight distribution, four fluorine resin composite has more excellent performance.
Tetrafluoroethylene is a polymer of tetrafluoroethylene. PTFE is abbreviated in English. The basic structure of ptfe. - CF2 - CF2 - CF2 - CF2 - CF2 - CF2 - CF2 - CF2 - CF2 - CF2 -. Ptfe is widely used in all kinds of resistance to acid and alkali and organic solvent, itself has no toxic to people, but in the process of production use of the raw material of total acid ammonium (PFOA) is considered possible carcinogenic.
Ptfe relative molecular mass is bigger, for hundreds of thousands of low, high of more than ten million, generally for millions of polyethylene (degree of polymerization in 104 orders of magnitude, and only in 103). General crystallinity is 90 ~ 95%, melting temperature is 327 ~ 342 ℃. Ptfe molecular of CF2 unit in terms of the sawtooth shape due to hydrogen fluorine atom radius is larger, so the adjacent CF2 unit can't completely according to the trans cross orientation, it forms a spiral twisted chains, fluorine atoms almost covers the entire surface of the polymer chain. This molecular structure explains the various properties of ptfe. Temperature is lower than the 19 ℃, form a spiral 13/6; Phase transition in 19 ℃, molecular slightly untied, form a spiral 15/7.
Although carbon - carbon bonds in whole fluorine carbon compounds and carbon - fluorine key fracture need to absorb energy, respectively, 346.94 and 484.88 kJ/mol, but ptfe depolymerization generated 1 mol tetrafluoroethylene only energy of 171.38 kJ. So in the high temperature cracking, polytetrafluoroethylene is the main solution to the tetrafluoroethylene.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
Ptfe in 260, 370 and 420 ℃ when the weight loss rate (%) per hour, respectively 1 x 10-4, 4 x 10-3 and 9 x 10-2. Visible, ptfe at 260 ℃ for long-term use. Due to the high temperature cracking and produce toxic by-products fluorine phosgene and perfluorinated isobutylene, etc., so it is important to pay special attention to the safety and prevent the ptfe contact with open flame.
The friction coefficient of ptfe is very small, only one fifth of polyethylene, which is an important feature of fluorocarbon surface. Polytetrafluoroethylene is not viscous because of the low pressure of the fluorine carbon chain.
Ptfe in - within the wider temperature range 196 ~ 260 ℃ have excellent mechanical properties, one of the characteristics of the fluorocarbon polymer is in a constant low temperature brittle.
In addition to the molten alkali metals, ptfe is almost immune from any chemical reagent. In concentrated sulfuric acid, nitric acid, hydrochloric acid, for example, even in aqua regia to boil, its weight and performance are no change, almost insoluble in all solvents, only at above 300 ℃ is slightly soluble in total alkane (0.1 g / 100 g). Polytetrafluoroethylene is not moist, it is not burning, it is extremely stable for oxygen and uv, so it has excellent weatherability.
Ptfe is produced by free radical polymerization of teflon. The industrial polymerization is stirred by large amounts of water, which is used to disperse the heat of reaction and to control the temperature. Polymerization in 40 ~ 80 ℃, 3 ~ 26 kg/cm2 pressure, under available inorganic sulfate, organic peroxide as the initiator, also can use the REDOX initiator system. Every mole tetrafluoroethylene polymerization is 171.38 kJ. Dispersive polymerization must be added with a full fluorotype surface active agent, such as perfluoric acid or its salt.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian