News Details
Unsaturated resins with flame retardant
2017-10-28 11:44:30
Unsaturated resins with flame retardant
Using unsaturated resin with flame retardant agent and 1.2 - propylene glycol, maleic anhydride, phthalic anhydride, styrene as raw materials was synthesized without halogen flame retardant unsaturated polyester resin, unsaturated resin with the addition of flame retardant volume and flame retardant unsaturated polyester resin product acid value, the curing time and oxygen index were studied. The main properties of synthetic flame retardant unsaturated polyester resin products are better under the initial conditions.
Unsaturated polyester resin (UPR) is a kind of very important thermosetting resin. It is widely used in many fields such as transportation, electrical engineering, aerospace, chemical industry and so on. Because of the general type unsaturated polyester resin of high content of carbon, hydrogen, it is easy to burn, and produce a large amount of harmful smoke during burning, therefore, are important in many occasions, all need flame retardant unsaturated polyester resin.
In order to make unsaturated polyester resin flame retardant, two methods are commonly used: one is to add flame retardant (added flame retardant UPR) to the forming process of unsaturated polyester resin. Another is synthetic unsaturated polyester resin (reactive flame retardant UPR) with flame retardant elements. The latter is directly in the polyester structure, the flame retardant effect is stable, and the physical properties of the products are improved greatly.
At present, domestic and foreign production reactive flame retardant UPR, most of the use of halogen series flame retardants, they have serious shortcomings. Due to the introduction of the halogen decreased by flame retardant uv resistance of the body material, burns produce large amounts of toxic gases, smoke and corrosive and personal lives a serious threat to the environment.
Therefore, the use of halogen flame retardants, especially phosphor flame retardants, to replace halogen flame retardants, the synthetic reactive flame retardant UPR products is a research hotspot in this field. The application of phosphorus flame retardants in unsaturated polyester resin shows a new prospect.
Main instruments: unsaturated polyester resin by mouth flask, beaker, measuring cylinder, temperature 300 ℃, the cooling pipe, adjustable electric heating jacket, alkali type buret, 50 ml 250 ml conical flask, desktop day equality.
In the dry three-mouth flask, the anhydride, benzyl anhydride and propylene glycol are added to the measure, slowly heating and cooling water in the straight condensing tube. Up to 80 ℃ in 15 minutes, fully stirring, reoccupy 45 minutes will increase temperature to 160 ℃. Within 30 minutes after the temperature rise to 190 ~ 200 ℃, and maintain the reaction under the temperature for 1 hour, stop heating, the reactant cooling to 180 ℃.
Acid value have obvious effects on unsaturated polyester resin, with the decrease of acid value, the molecular weight of polymer increases gradually, the viscosity increases gradually, but the high acid value, easy to cause the polycondensation reaction is incomplete, affect the physical performance of a product. The ratio of raw materials must be considered sufficiently to determine whether the acid value is suitable or not.
Temperature is too high, side reaction, the system viscosity will increase in a short period of time, response is difficult to control, make the resin gelation easily when higher than 200 ℃. Temperature is too low, difficult to, the temperature is below 190 ℃, the esterification reaction is too slow, take too long. You should try to use a gradual temperature rise to control the reaction time.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Cas No:13674 -84-5
HS Code HS: 29199000
The most important indicator of product:
colorless transparent liquid, moisture ≤ 0.1, Acid value ≤ 0.1, Chroma ≤ 50, the phosphorus content: 9.4 ± 0.5
Raw materials: phosphorus oxychloride and epichlorohydrin.
Belong to several categories of dangerous goods:
Currently Tris(2-chloroisopropyl)Phosphate TCPP general cargo exports are not dangerous.
The product is used for the soft / hard polyurethane foam, with thermal and hydrolytic stability good, especially suitable for ASTME84 (Level 11) foam, with low viscosity unsaturated polyester resin in low temperature application and phenolic plastics at. This product is also used to grab the foam sealant and sheet production. For polyvinyl chloride, polystyrene, phenolic resin, acrylic resin and rubber, coating, flame retardant, also used for soft and hard polyurethane foam, epoxy resin, polystyrene, cellulose acetate, ethyl cellulose tree and phenolic plastics, polyvinyl acetate and gun type foam sealant production. Particularly recommended for rigid polyurethane foam has excellent thermal and hydrolytic stability is particularly suitable for ASTM84 (II), compound for polyurethane foam and unsaturated resin and phenolic plastics.
As the reaction progresses, the reactants are constantly consumed and the acid value of the system gradually decreases, and the degree of reaction can be estimated by the acid value of the measurement system.
Unsaturated polyester, this response is generated in the process of experiment are by-products of water discharge, through the collection of water reflects the consumption of the reactants can be calculated, thus the degree of reaction.
As the reaction is carried out, the viscosity of the system increases, and a small drop of reaction fluid is taken out at different times to measure its viscosity, thus the degree of the estimated reaction can be estimated.
Maleic anhydride M= 98,16.5 g, 0.168 mol. Phthalic anhydride M= 148,25g, 0.168 mol. Propylene glycol M= 76,28.25 g, 0.372 mol. An overdose of alcohol, an excess of about 10% of the total acid, can ensure a smooth response.
The significance of acid value: the number of KOH (KOH/g resin) consumed by neutralizing 1g resin. Because before the start of the reaction is not raw material have a theory, acid value, as the reaction of acid or anhydride is used, the acid value and immediately change, until the end of the reaction should also have a acid value, which can determine the reaction end point.
Heating up too fast can result in the loss of propylene glycol, which makes the system viscosity increase and the acid value is high, the temperature rise is too fast, and the side reaction is easy to occur. The reaction time was prolonged and the reaction time was prolonged, which also resulted in the loss of propylene glycol. Temperature is too high, side reaction, the system viscosity will increase in a short period of time, response is difficult to control, make the resin gelation easily when higher than 200 ℃. Temperature is too low, difficult to, the temperature is below 190 ℃, the esterification reaction is too slow, take too long. So the reaction temperature should be at 190 ~ 190 ℃ advisable.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Using unsaturated resin with flame retardant agent and 1.2 - propylene glycol, maleic anhydride, phthalic anhydride, styrene as raw materials was synthesized without halogen flame retardant unsaturated polyester resin, unsaturated resin with the addition of flame retardant volume and flame retardant unsaturated polyester resin product acid value, the curing time and oxygen index were studied. The main properties of synthetic flame retardant unsaturated polyester resin products are better under the initial conditions.
Unsaturated polyester resin (UPR) is a kind of very important thermosetting resin. It is widely used in many fields such as transportation, electrical engineering, aerospace, chemical industry and so on. Because of the general type unsaturated polyester resin of high content of carbon, hydrogen, it is easy to burn, and produce a large amount of harmful smoke during burning, therefore, are important in many occasions, all need flame retardant unsaturated polyester resin.
In order to make unsaturated polyester resin flame retardant, two methods are commonly used: one is to add flame retardant (added flame retardant UPR) to the forming process of unsaturated polyester resin. Another is synthetic unsaturated polyester resin (reactive flame retardant UPR) with flame retardant elements. The latter is directly in the polyester structure, the flame retardant effect is stable, and the physical properties of the products are improved greatly.
At present, domestic and foreign production reactive flame retardant UPR, most of the use of halogen series flame retardants, they have serious shortcomings. Due to the introduction of the halogen decreased by flame retardant uv resistance of the body material, burns produce large amounts of toxic gases, smoke and corrosive and personal lives a serious threat to the environment.
Therefore, the use of halogen flame retardants, especially phosphor flame retardants, to replace halogen flame retardants, the synthetic reactive flame retardant UPR products is a research hotspot in this field. The application of phosphorus flame retardants in unsaturated polyester resin shows a new prospect.
Main instruments: unsaturated polyester resin by mouth flask, beaker, measuring cylinder, temperature 300 ℃, the cooling pipe, adjustable electric heating jacket, alkali type buret, 50 ml 250 ml conical flask, desktop day equality.
In the dry three-mouth flask, the anhydride, benzyl anhydride and propylene glycol are added to the measure, slowly heating and cooling water in the straight condensing tube. Up to 80 ℃ in 15 minutes, fully stirring, reoccupy 45 minutes will increase temperature to 160 ℃. Within 30 minutes after the temperature rise to 190 ~ 200 ℃, and maintain the reaction under the temperature for 1 hour, stop heating, the reactant cooling to 180 ℃.
Acid value have obvious effects on unsaturated polyester resin, with the decrease of acid value, the molecular weight of polymer increases gradually, the viscosity increases gradually, but the high acid value, easy to cause the polycondensation reaction is incomplete, affect the physical performance of a product. The ratio of raw materials must be considered sufficiently to determine whether the acid value is suitable or not.
Temperature is too high, side reaction, the system viscosity will increase in a short period of time, response is difficult to control, make the resin gelation easily when higher than 200 ℃. Temperature is too low, difficult to, the temperature is below 190 ℃, the esterification reaction is too slow, take too long. You should try to use a gradual temperature rise to control the reaction time.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Cas No:13674 -84-5
HS Code HS: 29199000
The most important indicator of product:
colorless transparent liquid, moisture ≤ 0.1, Acid value ≤ 0.1, Chroma ≤ 50, the phosphorus content: 9.4 ± 0.5
Raw materials: phosphorus oxychloride and epichlorohydrin.
Belong to several categories of dangerous goods:
Currently Tris(2-chloroisopropyl)Phosphate TCPP general cargo exports are not dangerous.
The product is used for the soft / hard polyurethane foam, with thermal and hydrolytic stability good, especially suitable for ASTME84 (Level 11) foam, with low viscosity unsaturated polyester resin in low temperature application and phenolic plastics at. This product is also used to grab the foam sealant and sheet production. For polyvinyl chloride, polystyrene, phenolic resin, acrylic resin and rubber, coating, flame retardant, also used for soft and hard polyurethane foam, epoxy resin, polystyrene, cellulose acetate, ethyl cellulose tree and phenolic plastics, polyvinyl acetate and gun type foam sealant production. Particularly recommended for rigid polyurethane foam has excellent thermal and hydrolytic stability is particularly suitable for ASTM84 (II), compound for polyurethane foam and unsaturated resin and phenolic plastics.
As the reaction progresses, the reactants are constantly consumed and the acid value of the system gradually decreases, and the degree of reaction can be estimated by the acid value of the measurement system.
Unsaturated polyester, this response is generated in the process of experiment are by-products of water discharge, through the collection of water reflects the consumption of the reactants can be calculated, thus the degree of reaction.
As the reaction is carried out, the viscosity of the system increases, and a small drop of reaction fluid is taken out at different times to measure its viscosity, thus the degree of the estimated reaction can be estimated.
Maleic anhydride M= 98,16.5 g, 0.168 mol. Phthalic anhydride M= 148,25g, 0.168 mol. Propylene glycol M= 76,28.25 g, 0.372 mol. An overdose of alcohol, an excess of about 10% of the total acid, can ensure a smooth response.
The significance of acid value: the number of KOH (KOH/g resin) consumed by neutralizing 1g resin. Because before the start of the reaction is not raw material have a theory, acid value, as the reaction of acid or anhydride is used, the acid value and immediately change, until the end of the reaction should also have a acid value, which can determine the reaction end point.
Heating up too fast can result in the loss of propylene glycol, which makes the system viscosity increase and the acid value is high, the temperature rise is too fast, and the side reaction is easy to occur. The reaction time was prolonged and the reaction time was prolonged, which also resulted in the loss of propylene glycol. Temperature is too high, side reaction, the system viscosity will increase in a short period of time, response is difficult to control, make the resin gelation easily when higher than 200 ℃. Temperature is too low, difficult to, the temperature is below 190 ℃, the esterification reaction is too slow, take too long. So the reaction temperature should be at 190 ~ 190 ℃ advisable.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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