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Crosslinking agent with phosphorous coating
2017-7-13 19:23:09
Crosslinking agent with phosphorous coating
The use of crosslinked epoxy resin with phosphorus crosslinking agent is one of the methods to introduce phosphorus elements into epoxy resin. The flame retardancy and thermal stability of epoxy resin can be improved by introducing the phosphor group into the structure of the crosslinking agent.
In general, the research of phosphorus crosslinking agent mainly includes several aspects such as phosphate crosslinking agent, phosphorous nitrogen heterocyclic crosslinking agent, DOPO - based heterocyclic crosslinking agent and phosphorus silicon synergistic crosslinking agent.
DOPO base phosphorus heterocyclic compound is a new bright spot in the study, which has become a hot spot to replace the traditional bromine flame retardant due to its excellent flame retardancy, thermal stability and mechanical properties. Huang Shishuai, ortho-phenyl phenol and phosphorus oxychloride first synthesized important intermediates 9, 10 - dihydro - 9 - oxygen impurity fe - 10 - phosphonic chloride (ODC), and then to ODC new types of carboxylic acid has been synthesized epoxy crosslinking agent ODC - TA.
The thermal properties of ODC - TA/CYD - 128 crosslinking were analyzed by TGA. As crosslinking agent containing phosphorus heterocyclic structure of stability, at the same time, the thermal stability of benzene ring is stronger, P - O can key in the key is very large, with the increase of phosphorus content, also with higher initial decomposition temperature, crosslinking material heat resistance was improved.
Crosslinking agent at the same time, phosphorus is the introduction of ODC - TA, makes the ODC - TA/CYD - 128 crosslinked at 750 ℃ and 800 ℃ when the rate of carbon residue was improved obviously, and when the ODC - TA/CYD - 128 = 45:100, achieve greater value, 51.32%, 50.04% respectively, than the DDM/CYD - 128 crosslinked content increased by 69.50% and 98.33%. The introduction of phosphorus element can improve the flame retardant performance of epoxy resin system.
Levchik etc will be 2 - (between - aminobenzene) methyl oxidation '(DNMP) crosslinking DGEBA epoxy resin, the study found that in the 600 ℃ amount of residual carbon increased from 12% to 30%, the flame retardant mechanism of epoxy resin could be due to delayed fracture the volatilization of chain.
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
The use of crosslinked epoxy resin with phosphorus crosslinking agent is one of the methods to introduce phosphorus elements into epoxy resin. The flame retardancy and thermal stability of epoxy resin can be improved by introducing the phosphor group into the structure of the crosslinking agent.
In general, the research of phosphorus crosslinking agent mainly includes several aspects such as phosphate crosslinking agent, phosphorous nitrogen heterocyclic crosslinking agent, DOPO - based heterocyclic crosslinking agent and phosphorus silicon synergistic crosslinking agent.
DOPO base phosphorus heterocyclic compound is a new bright spot in the study, which has become a hot spot to replace the traditional bromine flame retardant due to its excellent flame retardancy, thermal stability and mechanical properties. Huang Shishuai, ortho-phenyl phenol and phosphorus oxychloride first synthesized important intermediates 9, 10 - dihydro - 9 - oxygen impurity fe - 10 - phosphonic chloride (ODC), and then to ODC new types of carboxylic acid has been synthesized epoxy crosslinking agent ODC - TA.
The thermal properties of ODC - TA/CYD - 128 crosslinking were analyzed by TGA. As crosslinking agent containing phosphorus heterocyclic structure of stability, at the same time, the thermal stability of benzene ring is stronger, P - O can key in the key is very large, with the increase of phosphorus content, also with higher initial decomposition temperature, crosslinking material heat resistance was improved.
Crosslinking agent at the same time, phosphorus is the introduction of ODC - TA, makes the ODC - TA/CYD - 128 crosslinked at 750 ℃ and 800 ℃ when the rate of carbon residue was improved obviously, and when the ODC - TA/CYD - 128 = 45:100, achieve greater value, 51.32%, 50.04% respectively, than the DDM/CYD - 128 crosslinked content increased by 69.50% and 98.33%. The introduction of phosphorus element can improve the flame retardant performance of epoxy resin system.
Levchik etc will be 2 - (between - aminobenzene) methyl oxidation '(DNMP) crosslinking DGEBA epoxy resin, the study found that in the 600 ℃ amount of residual carbon increased from 12% to 30%, the flame retardant mechanism of epoxy resin could be due to delayed fracture the volatilization of chain.
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
Deng Jing etc in between two phenol and phosphorus oxychloride as raw materials in the molten state synthesized a kind of hyperbranched poly (3 - hydroxy toluene) phosphate ester (HHPP) crosslinking agent, crosslinking with the product of epoxy resin with alone between two phenol as crosslinking agent of epoxy resin, the glass transition temperature increased from 85.6 ℃ to 114.2 ℃.
When the HHPP/DHB mixed system was used as the crosslinking agent of epoxy resin, the crosslinking sample of 25% HHPP (wt) was increased from 22 to 27, and the maximum heat release rate was 724kW, compared with the pure DHB. M minus 2 goes down to 369kW? M minus 2, the final carbon rate increased from 22.3% to 41.2%, indicating that the addition of a small amount of HHPP to the combustion is a stable crosslinked structure aromatic compound, and HHPP is an effective organophosphate flame retardant.
Phosphate ester, also known as orthophosphate, is a phosphate derivative of phosphoric acid, which is a kind of phosphate derivative. For ternary phosphate acid, so according to replace the hydroxyl number is different, and phosphate can be divided into "phosphate (phosphoric acid ester, alkyl phosphate), secondary phosphate (dihydrogen phosphate ester) and tertiary phosphate (three phosphate ester).
One and two ester of phosphoric acid are strong acids, such as the pKa of phosphate and dimethyl phosphate, respectively 1.54 and 1.29 respectively. Alkyl phosphoric acid, hydrocarbon base pyrophosphate and hydrocarbon triphosphate are all in the form of salt. DNA and RNA can be thought of as [PO2 (OR] OR 'n' - type polymers.
Phosphate ester is mainly used for phosphorous pesticide, nerve gas, hard - burning hydraulic oil, lubricating oil.
1 mole of phosphate and 1, 2, 3 moles of alcohol produce one ester of phosphate, diester and triglyceride.
The special catalytic esterification method is widely used in the field of metal processing, which reduces friction and wear under the condition of high loading. LYCOMAX has developed phosphaters including oily MAX P16, water-based LYCO - P08 LYCO - P30, etc., which are used in aluminum rolling fluid, steel plate rolling, grinding fluid, stamping oil, ultra-fine grinding, grinding fluid, cold rolled fluid and other products.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Deng Jing etc in between two phenol and phosphorus oxychloride as raw materials in the molten state synthesized a kind of hyperbranched poly (3 - hydroxy toluene) phosphate ester (HHPP) crosslinking agent, crosslinking with the product of epoxy resin with alone between two phenol as crosslinking agent of epoxy resin, the glass transition temperature increased from 85.6 ℃ to 114.2 ℃.
When the HHPP/DHB mixed system was used as the crosslinking agent of epoxy resin, the crosslinking sample of 25% HHPP (wt) was increased from 22 to 27, and the maximum heat release rate was 724kW, compared with the pure DHB. M minus 2 goes down to 369kW? M minus 2, the final carbon rate increased from 22.3% to 41.2%, indicating that the addition of a small amount of HHPP to the combustion is a stable crosslinked structure aromatic compound, and HHPP is an effective organophosphate flame retardant.
Phosphate ester, also known as orthophosphate, is a phosphate derivative of phosphoric acid, which is a kind of phosphate derivative. For ternary phosphate acid, so according to replace the hydroxyl number is different, and phosphate can be divided into "phosphate (phosphoric acid ester, alkyl phosphate), secondary phosphate (dihydrogen phosphate ester) and tertiary phosphate (three phosphate ester).
One and two ester of phosphoric acid are strong acids, such as the pKa of phosphate and dimethyl phosphate, respectively 1.54 and 1.29 respectively. Alkyl phosphoric acid, hydrocarbon base pyrophosphate and hydrocarbon triphosphate are all in the form of salt. DNA and RNA can be thought of as [PO2 (OR] OR 'n' - type polymers.
Phosphate ester is mainly used for phosphorous pesticide, nerve gas, hard - burning hydraulic oil, lubricating oil.
1 mole of phosphate and 1, 2, 3 moles of alcohol produce one ester of phosphate, diester and triglyceride.
The special catalytic esterification method is widely used in the field of metal processing, which reduces friction and wear under the condition of high loading. LYCOMAX has developed phosphaters including oily MAX P16, water-based LYCO - P08 LYCO - P30, etc., which are used in aluminum rolling fluid, steel plate rolling, grinding fluid, stamping oil, ultra-fine grinding, grinding fluid, cold rolled fluid and other products.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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