PVC composite environmental-friendly fire retardant and PVC flame retardant plastics
Technical field
The present invention relates to a kind of fire retardant and PVC plastics, relate in particular to a kind of PVC composite environmental-friendly fire retardant and PVC flame retardant plastics.
Background technology
Fire is the symbol of human civilization, and its application in the human lives had once promoted historical progress, but it can engulf a large amount of wealth of societys again in seconds simultaneously, harm people's life security.According to statistics, the annual presence of fire in the whole world is about more than 500 ten thousand, and nearly 100,000 people die among the sea of fire, and hundreds of millions of properties are destroyed, and countless people have lost their relatives.
In China, fire hazard situation allows of no optimist equally, and some fire disaster accidents occur again and again.For example, on November 15th, 2010,28 floor flat building generation fire disasters of Jing'an District, Shanghai City.Official investigation rises because operate against regulations, cause that the inflammable materials such as various nylon wires, polyurethane foam burn rapidly on the dwelling house scaffolding without the card welding operator, leads to 58 people and dies in an accident the tragedy that 70 people are injured.
Most plastics all are inflammable substances, and the material of construction of plastics, communications and transportation material, home electric appliance material etc. all need plastics not burn, and good flame retardant properties is arranged, and require the degree of being fuming of plastics in big fire little.For this reason, in plastic formula, select to add fire retardant and just become extremely important.
Requirement to fire retardant:
(1) good anti-flaming function will be arranged, consumption seldom just can obviously play fire retardation;
(2) can not affect the physical strength of plastics after fire retardant adds, particularly can not reduce heat-drawn wire, mechanics temperature and the electrical insulation capability of plastics;
(3) to get well with the consistency of resin, in plastics, not move, do not separate out, be not extracted;
(4) in high-temperature fusion moulding and thermoforming process engineering, do not decompose, do not react with other materials yet;
(5) in plastics, be easy to be uniformly dispersed, good weatherability, persistence is good, makes plastics have long-term flame retardant resistance.
As seen, the selection of fire retardant in the plastics is a very complicated process, must consider above-mentioned every factor.In existing textbook, provided such as: protective membrane mechanism, not so mechanism such as gas mechanism, coolant mechanism and terminating chain lock reactor mechanism; these can select to provide a fuzzy direction to fire retardant, effectively help but but can't provide real.
Summary of the invention
For above shortcomings in the prior art, one of technical problem to be solved by this invention provides a kind of PVC composite environmental-friendly fire retardant.
Two of technical problem to be solved by this invention provides a kind of PVC flame retardant plastics.
Technical problem to be solved by this invention is achieved by the following technical solution:
A kind of PVC composite environmental-friendly fire retardant is comprised of the component of following weight parts: trimethylsilyl dimethyl methyl phosphonate 10-20 part, melamine cyanurate 30-50 part, molybdic oxide 10-20 part, ammonium polyphosphate 40-60 part.
Trimethylsilyl dimethyl methyl phosphonate, melamine cyanurate, molybdic oxide and ammonium polyphosphate are mixed, can make this PVC composite environmental-friendly fire retardant.
The present invention also provides a kind of PVC flame retardant plastics, is comprised of by weight following component: 100 parts of polyvinyl chloride resins, PVC are used composite environmental-friendly fire retardant 10-30 part.
Take by weighing polyvinyl chloride resin and PVC composite environmental-friendly fire retardant by proportioning, after mixing, adopt industry universal method melting mixing, extruding pelletization, namely obtain the PVC flame retardant plastics.
PVC, Chinese: polyvinyl chloride English name: polyvinylchloride is the polymkeric substance with random configuration structure that a kind of repeating unit is.
Thermotolerance and the flame retardant resistance of PVC flame retardant plastics of the present invention are more excellent, and preparation technology is simple, and product cost is low, and the over-all properties of product is more excellent.
PVC of the present invention has good anti-flaming function with the composite environmental-friendly fire retardant, good with the consistency of PVC, in PVC, do not move, do not separate out, be not extracted, be easy to be uniformly dispersed, good weatherability, persistence is good, in high-temperature fusion moulding and the thermoforming process engineering, do not decompose, the performances such as the PVC flame retardant plastics heat-drawn wire, mechanics temperature and the electrical insulation capability that make are not affected, and plastics have long-term flame retardant resistance.
Embodiment
The trimethylsilyl dimethyl methyl phosphonate, CAS number: 13433-42-6.Its English name is: Phosphonic acid, P-[(trimethylsilyl) methyl]-, dimethyl ester.
Melamine cyanurate, English name melamine cyanurate, Chinese another name: melamine pyrophosphate; Halogen-free flame retardants MPP; Melamine cyanurate; MCA; The halogen-free flameproof lubricant, CAS number: 37640-57-6.
The embodiment 1PVC preparation of composite environmental-friendly fire retardant
Take by weighing: 15 kilograms of trimethylsilyl dimethyl methyl phosphonates, 40 kilograms of melamine cyanurates, 15 kilograms of molybdic oxides, 50 kilograms of ammonium polyphosphates.
Trimethylsilyl dimethyl methyl phosphonate, melamine cyanurate, molybdic oxide and ammonium polyphosphate are mixed, can make this PVC composite environmental-friendly fire retardant.
The preparation of embodiment 2PVC flame retardant plastics
Take by weighing the PVC of 100 kilograms of polyvinyl chloride resins and embodiment 1 preparation with 20 kilograms of composite environmental-friendly fire retardants, after mixing, adopt industry universal method melting mixing, extruding pelletization, namely obtain the PVC flame retardant plastics.
Comparative example
Take by weighing: 15 kilograms of tricresyl phosphate (2-chloropropyl) esters, 40 kilograms of melamine cyanurates, 15 kilograms of molybdic oxides, 50 kilograms of ammonium polyphosphates, mix, make the composite environmental-friendly fire retardant.
Take by weighing 20 kilograms of 100 kilograms of polyvinyl chloride resins and above-mentioned composite environmental-friendly fire retardants, after mixing, adopt industry universal method melting mixing, extruding pelletization, namely obtain the PVC flame retardant plastics.
Test case
To blank example, embodiment 2 and comparative example are tested, and concrete data see Table 1.Wherein, blank example is pure PVC, does not add any fire retardant.
Table 1:PVC flame retardant plastics flame retardant properties test chart
|
The UL-94 flame retardant rating, (1.6mm) |
LOI,% |
Blank example |
NR |
45.5 |
Embodiment 2 |
V0 |
61.5 |
Comparative example |
V0 |
59.6 |
The trade mark that PVC in blank example, embodiment 2 and the comparative example all is selected from Qilu Petrochemical production is the PVC of S-700.
Thermotolerance and the flame retardant resistance of PVC flame retardant plastics of the present invention are more excellent, and preparation technology is simple, and product cost is low, and the over-all properties of product is more excellent.
And embodiment 2 has descended 44.5% with respect to the routine smoke density of blank.
PVC of the present invention composite environmental-friendly fire retardant, not halogen-containing, have good anti-flaming function, good with the consistency of PVC, in PVC, do not move, do not separate out, be not extracted, be easy to be uniformly dispersed, good weatherability, persistence is good, in high-temperature fusion moulding and the thermoforming process engineering, do not decompose, the performances such as the PVC flame retardant plastics heat-drawn wire, mechanics temperature and the electrical insulation capability that make are not affected, and plastics have long-term flame retardant resistance.