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Crosslinking agent for fluorine paint
2017-8-28 11:42:35
Crosslinking agent for fluorine paint
China's economy continues to grow rapidly, providing a wide market for the application of teflon paint crosslinking agent.
Room temperature four fluorine coating crosslinking agent can keep regular fluoride coating excellent durability and stain resistance and resistance to chemical media comprehensive performance, four fluorine coating crosslinking agent can 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 of tetrafluorochemicals in the synthesis process has some influence on the performance of teflon.Most of the four fluorine resins abroad are used as initiators of peroxides (e.g., tert-pentyl peroxide) as initiators, and the domestic product is used more with azo as the 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.
Teflon is a polymer of tetrafluoroethylene.The abbreviation is PTFE.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.
Polytetrafluoroethylene is relatively high in molecular weight, with a low of hundreds of thousands, with a height of more than 10 million, usually of millions (the aggregation is at 104 orders of magnitude, while polyethylene is only 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.
While the fracture of carbon-carbon bonds and carbon-fluorine bonds in perfluorocarbon compounds requires energy absorption of 346.94 and 484.88 kJ/mol, the polytetrafluoroethylene solution generates 1 mole of tetrafluoroethylene only with energy 171.38 kJ.So in pyrolysis, polytetrafluoroethylene is the main solution of polytetrafluoroethylene.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
China's economy continues to grow rapidly, providing a wide market for the application of teflon paint crosslinking agent.
Room temperature four fluorine coating crosslinking agent can keep regular fluoride coating excellent durability and stain resistance and resistance to chemical media comprehensive performance, four fluorine coating crosslinking agent can 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 of tetrafluorochemicals in the synthesis process has some influence on the performance of teflon.Most of the four fluorine resins abroad are used as initiators of peroxides (e.g., tert-pentyl peroxide) as initiators, and the domestic product is used more with azo as the 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.
Teflon is a polymer of tetrafluoroethylene.The abbreviation is PTFE.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.
Polytetrafluoroethylene is relatively high in molecular weight, with a low of hundreds of thousands, with a height of more than 10 million, usually of millions (the aggregation is at 104 orders of magnitude, while polyethylene is only 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.
While the fracture of carbon-carbon bonds and carbon-fluorine bonds in perfluorocarbon compounds requires energy absorption of 346.94 and 484.88 kJ/mol, the polytetrafluoroethylene solution generates 1 mole of tetrafluoroethylene only with energy 171.38 kJ.So in pyrolysis, polytetrafluoroethylene is the main solution of polytetrafluoroethylene.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
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, the toxic by-products fluorofluorine and perfluoroisobutylene are also produced, so it is necessary to pay special attention to safety protection and prevent ptfe exposure.
The friction coefficient of ptfe is very small, only 1/5 of PE, which is an important feature of the whole fluorocarbon surface.The fluorine - carbon chain has a very low intermolecular force, so teflon is not viscous.
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.
Polytetrafluoroethylene is almost free from any chemical reagent, except for molten alkali.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 a moisture absorption, it is not combustible, it is extremely stable for oxygen and ultraviolet ray, so it has excellent weatherability.
Because the coating is increasingly strict environmental protection laws and regulations, and the production cost and product quality control consciousness growing, workpiece internal containing thermosensitive materials such as thermal rubber washer, wire, etc., its heat resistance temperature does not exceed 120 ° C.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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, the toxic by-products fluorofluorine and perfluoroisobutylene are also produced, so it is necessary to pay special attention to safety protection and prevent ptfe exposure.
The friction coefficient of ptfe is very small, only 1/5 of PE, which is an important feature of the whole fluorocarbon surface.The fluorine - carbon chain has a very low intermolecular force, so teflon is not viscous.
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.
Polytetrafluoroethylene is almost free from any chemical reagent, except for molten alkali.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 a moisture absorption, it is not combustible, it is extremely stable for oxygen and ultraviolet ray, so it has excellent weatherability.
Because the coating is increasingly strict environmental protection laws and regulations, and the production cost and product quality control consciousness growing, workpiece internal containing thermosensitive materials such as thermal rubber washer, wire, etc., its heat resistance temperature does not exceed 120 ° C.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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