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Organo boron system flame retardant for polyolefin
2017-12-3 15:48:12
Organo boron system flame retardant for polyolefin
At present, the most common with flame retardant effect of the elements are: group 3, group B IV boron Ti / Zr, V A and N / P / sb and br / Group VII chloride.
The standard of fire retardants should be considered whether they are flame retardant, whether they are toxic or not, whether toxic gases are generated during processing, and whether they produce large amounts of smoke and harmful gases during combustion. There are a variety of flame retardants due to toxic and is disabled, as early as three (N-heterocyclic propyl) phosphine oxide (APO, also known as TEPA), decabromodiphenyl oxide and the recent (DEBDE) and six (HBCD) twelve ring alkyl bromide.
Phosphorus - based flame retardants have good flame retardancy, and halogen - containing flame retardants have good flame retardancy, but they produce two times in the process of use and combustion.
With the continuous introduction of new environmental regulations, organic boron based flame retardants for polyolefin are attracting attention due to their excellent flame-retardant, low toxicity and smoke suppression characteristics, which conform to the development trend of halogenation, innocuity and smoke suppression of flame retardants.
Boron is rich in resources. As early as eighteenth Century, borax was used as a flame retardant, and it was the earliest inorganic boron - based flame retardant. The application of organo boron compounds is limited to some extent because of the instability of the organo boron compounds, which causes the washing of water and the expensive price. However, compared with organophosphorus flame retardants, the toxicity of polyolefin with organophosphorus flame retardants is much less than that of the latter, and it also has good smoke suppression.
If the organic nitrogen, phosphorus, and boron compounds, such as halogen silicon into a molecular structure in the synthesis of boron containing compound flame retardant, and try to improve the content of boron in the molecule, one can improve the pure boron flame retardant high hydrolysis stability and reduce the price, but also can reduce bromine and phosphorus flame retardant toxicity.
Nitrogen system flame retardant when used alone, the flame retardant effect is poor, but the combination of phosphorus compound flame retardant effect and enhanced together, such as ammonium phosphate and inorganic phosphorus, poly ammonium phosphate, phosphite ester, amide phosphonic acid esters, N- hydroxymethyl two methyl phosphonate propylene amine organic type (NMPPA four) and hydroxymethyl phosphonium chloride and urea prepolymer (Proban) etc..
The compound flame retardant of boron and nitrogen, or the compound flame retardant formed by the coordination chain of two elements of boron and nitrogen, can show good flame retardancy. Their synergistic flame retardancy is carried out respectively. When the nitrogen additive is heated to generate ammonia and nitrogen and other non combustible gases, coupled with flame retardant cellulose produced by the presence of carbon dioxide, these non flammable gas dilution of the combustible gas in the air to produce oxygen and polymer when heated, and non flammable gas generated, take a part for heat absorption and heat at the same time and reaction; nitrogen can capture free radicals, inhibition of polymer chain reaction, plays the role of free radicals.
Boron nitrogen compound flame retardant is to introduce boron and nitrogen two elements into the same molecular structure, and the two elements have better synergistic flame retardancy when they are burning.
Triphenyl Phosphate (TPP)
Flame retardant TPP has many advantages, such as excellent transparency, softness, bacterial resistance, and water proof, grease-proof, good electric insulation, as well as good compatibility. Flame retardant TPP is mainly used as the flame-retardant plasticizer for cellulose resin, vinyl resin, natural rubber and synthetic rubber. And it may also be used as the flame-retardant plasticizer for glyceryl triacetate thin ester and film, rigid polyurethane foam, phenolic aldehyde resin, and PPO, etc.
Flame retardant TPP is a kind of halogen-free environment-friendly flame retardant with phosphorus element. Most of the products in the market are self-colored flaky crystal, our product is self-colored crystalline powder, and is more soluble in organic solvents. TPP is not soluble in water, but soluble in benzene, chloroform, ether and acetone, and slightly soluble in Z alcohol. Flame retardant TPP is nonflammable with slight aromatic odor and slight deliquescence. The fusion point is about 50 ℃, and fast melts to hoop-shape when heated. The lubricate effect is excellent, and it is often used as the flame retardant plasticize lubricant. What is more, it is used as the flame retardant for many plastics and resins, such as phenolic aldehyde resin, epoxy resin and so on.
Boric acid is the basic raw material for the synthesis of borosilicate flame retardants. It is a one element weak acid. The main intermediates for the synthesis of these flame retardants are 2- allyl -1,3- oxo boron heterocyclic pentane, which is obtained from the reaction of potassium borohydride with allyl alcohol under the action of acetic acid. The compound is a boron oxygen five membered heterocyclic ring, which is very stable and does not hydrolyze. The reaction with ethanolamine and two ethanol were B - N ligand monocyclic and bicyclic compounds.
The flame retardant has B - N coordination chain, using conventional rolling baking finishing technology on cotton fabrics, flame retardant, good flame retardant effect, the LOI values were 24.2 and 25.2.
The intermediate is heated to 150~160 DEG, partial hydrolysis, and often pressure distillation to remove allyl alcohol; or reaction with ethylene glycol and heating from allyl alcohol, two products were obtained, with flame retardant properties of LOI were 25.2 and 22.4. The former has higher boron content than the latter and shows better flame retardancy.
Phosphoric - containing flame retardants will decompose and produce phosphoric acid at lower temperature, and become polyphosphoric acid with the increase of temperature, then the polyphosphoric acid will be synthesized. Polyphosphoric acid is a strong dehydrating agent that promotes the carbonization of cellulose and inhibits the formation of combustible cellulose lysates, thus producing flame retardancy. In addition, the decomposed phosphoric acid forms a non volatile protective layer that insulates the air.
However, phosphoric acid is a catalyst for cellulose to oxidize carbon to carbon monoxide in combustion. It reduces the production of carbon dioxide by continuous oxidation and prevents the flame retardancy of cellulose caused by exothermic reaction. The flame retardancy of phosphorus containing flame retardant mainly occurs in the phase of solidified phase.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
At present, the most common with flame retardant effect of the elements are: group 3, group B IV boron Ti / Zr, V A and N / P / sb and br / Group VII chloride.
The standard of fire retardants should be considered whether they are flame retardant, whether they are toxic or not, whether toxic gases are generated during processing, and whether they produce large amounts of smoke and harmful gases during combustion. There are a variety of flame retardants due to toxic and is disabled, as early as three (N-heterocyclic propyl) phosphine oxide (APO, also known as TEPA), decabromodiphenyl oxide and the recent (DEBDE) and six (HBCD) twelve ring alkyl bromide.
Phosphorus - based flame retardants have good flame retardancy, and halogen - containing flame retardants have good flame retardancy, but they produce two times in the process of use and combustion.
With the continuous introduction of new environmental regulations, organic boron based flame retardants for polyolefin are attracting attention due to their excellent flame-retardant, low toxicity and smoke suppression characteristics, which conform to the development trend of halogenation, innocuity and smoke suppression of flame retardants.
Boron is rich in resources. As early as eighteenth Century, borax was used as a flame retardant, and it was the earliest inorganic boron - based flame retardant. The application of organo boron compounds is limited to some extent because of the instability of the organo boron compounds, which causes the washing of water and the expensive price. However, compared with organophosphorus flame retardants, the toxicity of polyolefin with organophosphorus flame retardants is much less than that of the latter, and it also has good smoke suppression.
If the organic nitrogen, phosphorus, and boron compounds, such as halogen silicon into a molecular structure in the synthesis of boron containing compound flame retardant, and try to improve the content of boron in the molecule, one can improve the pure boron flame retardant high hydrolysis stability and reduce the price, but also can reduce bromine and phosphorus flame retardant toxicity.
Nitrogen system flame retardant when used alone, the flame retardant effect is poor, but the combination of phosphorus compound flame retardant effect and enhanced together, such as ammonium phosphate and inorganic phosphorus, poly ammonium phosphate, phosphite ester, amide phosphonic acid esters, N- hydroxymethyl two methyl phosphonate propylene amine organic type (NMPPA four) and hydroxymethyl phosphonium chloride and urea prepolymer (Proban) etc..
The compound flame retardant of boron and nitrogen, or the compound flame retardant formed by the coordination chain of two elements of boron and nitrogen, can show good flame retardancy. Their synergistic flame retardancy is carried out respectively. When the nitrogen additive is heated to generate ammonia and nitrogen and other non combustible gases, coupled with flame retardant cellulose produced by the presence of carbon dioxide, these non flammable gas dilution of the combustible gas in the air to produce oxygen and polymer when heated, and non flammable gas generated, take a part for heat absorption and heat at the same time and reaction; nitrogen can capture free radicals, inhibition of polymer chain reaction, plays the role of free radicals.
Boron nitrogen compound flame retardant is to introduce boron and nitrogen two elements into the same molecular structure, and the two elements have better synergistic flame retardancy when they are burning.
Triphenyl Phosphate (TPP)
Flame retardant TPP has many advantages, such as excellent transparency, softness, bacterial resistance, and water proof, grease-proof, good electric insulation, as well as good compatibility. Flame retardant TPP is mainly used as the flame-retardant plasticizer for cellulose resin, vinyl resin, natural rubber and synthetic rubber. And it may also be used as the flame-retardant plasticizer for glyceryl triacetate thin ester and film, rigid polyurethane foam, phenolic aldehyde resin, and PPO, etc.
Flame retardant TPP is a kind of halogen-free environment-friendly flame retardant with phosphorus element. Most of the products in the market are self-colored flaky crystal, our product is self-colored crystalline powder, and is more soluble in organic solvents. TPP is not soluble in water, but soluble in benzene, chloroform, ether and acetone, and slightly soluble in Z alcohol. Flame retardant TPP is nonflammable with slight aromatic odor and slight deliquescence. The fusion point is about 50 ℃, and fast melts to hoop-shape when heated. The lubricate effect is excellent, and it is often used as the flame retardant plasticize lubricant. What is more, it is used as the flame retardant for many plastics and resins, such as phenolic aldehyde resin, epoxy resin and so on.
Boric acid is the basic raw material for the synthesis of borosilicate flame retardants. It is a one element weak acid. The main intermediates for the synthesis of these flame retardants are 2- allyl -1,3- oxo boron heterocyclic pentane, which is obtained from the reaction of potassium borohydride with allyl alcohol under the action of acetic acid. The compound is a boron oxygen five membered heterocyclic ring, which is very stable and does not hydrolyze. The reaction with ethanolamine and two ethanol were B - N ligand monocyclic and bicyclic compounds.
The flame retardant has B - N coordination chain, using conventional rolling baking finishing technology on cotton fabrics, flame retardant, good flame retardant effect, the LOI values were 24.2 and 25.2.
The intermediate is heated to 150~160 DEG, partial hydrolysis, and often pressure distillation to remove allyl alcohol; or reaction with ethylene glycol and heating from allyl alcohol, two products were obtained, with flame retardant properties of LOI were 25.2 and 22.4. The former has higher boron content than the latter and shows better flame retardancy.
Phosphoric - containing flame retardants will decompose and produce phosphoric acid at lower temperature, and become polyphosphoric acid with the increase of temperature, then the polyphosphoric acid will be synthesized. Polyphosphoric acid is a strong dehydrating agent that promotes the carbonization of cellulose and inhibits the formation of combustible cellulose lysates, thus producing flame retardancy. In addition, the decomposed phosphoric acid forms a non volatile protective layer that insulates the air.
However, phosphoric acid is a catalyst for cellulose to oxidize carbon to carbon monoxide in combustion. It reduces the production of carbon dioxide by continuous oxidation and prevents the flame retardancy of cellulose caused by exothermic reaction. The flame retardancy of phosphorus containing flame retardant mainly occurs in the phase of solidified phase.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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