CN102040841A - Dynamic vulcanization halogen-free flame retardant silicon rubber/polyolefin thermoplastic elastomer - Google Patents
Dynamic vulcanization halogen-free flame retardant silicon rubber/polyolefin thermoplastic elastomer Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
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Abstract
The invention relates to the technical field of a thermoplastic elastomer material, in particular to a dynamic vulcanization halogen-free flame retardant silicon rubber/polyolefin thermoplastic elastomer and a preparation method thereof. The dynamic vulcanization halogen-free flame retardant silicon rubber/polyolefin thermoplastic elastomer comprises the following components in parts by weight: 100 parts of silicon rubber, 50-100 parts of polyolefin, 10-50 parts of white carbon black, 100-200 parts of halogen-free flame retardant, 1-5 parts of bulking agent, 1-2 parts of antioxidant, 1-3 parts of cross linking agent, 1-5 parts of hydroxyl silicone oil and 0.5-1 part of silane coupling agent. The thermoplastic elastomer can be widely applied to fields of automobiles, electronic and electrical engineering, cables and wires, medical equipment, architectural decoration and the like, not only contains no halogen and is environmentally friendly, but also has good flame retardant effect, and the oxygen index of the thermoplastic elastomer can reach up to 38.
Description
Technical field
The present invention relates to the thermoplastic elastic material technical field, particularly relate to a kind of dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic and preparation method thereof.
Background technology
Dynamic vulcanization thermoplastic elastomer is a kind of fluidity of molten of caoutchouc elasticity and thermoplastics and material of repeat performance of having concurrently.Its notable feature is that rubber and thermoplastic resin " on the spot " when melt blending cure; Simultaneously, mixture is subjected to the high speed shear stress of mixing machinery, and rubber is sulfided into crosslinked particle, also claim microcell (Domain), be dispersed in the resin, this crosslinked rubber domain mainly provides the elasticity of mixture, and resin then provides the plastic flow under the melt temperature.Because its excellent physical and mechanical properties, electrical insulation properties and process industrial art performance, and be widely used in various fields such as automobile, electric, electric wire, medicine equipment, building packing, progressively replaced vulcanized rubber and nonrigid plastic.
Silicon rubber (MVQ) is compared with general organic rubber as a kind of macromolecular material that has inorganic and organic character concurrently, has excellent high temperature resistant, anti-marquis, ageing-resistant, low compression set and electrical insulation capability.With silicon rubber is that the thermoplastic elastomer that main component prepares has the performance more excellent than general thermoplastic elastomer.In the prior art, mainly concentrating on the prescription and the preparation method of the dynamic vulcanization thermoplastic elastomer of EPDM/PP and NBR/PP type, is that the thermoplastic elastomer research report of elastic component is less with silicon rubber.Chinese patent CN 1188468C discloses the thermoplastic silicone elastomers by the preparation of compatibilized polyamide resin, and it is formed by dynamical cure by polyamide resin, silicone binder, expanding material and specific linking agent; U.S. Pat 6013715 (Gornowiez etc.) discloses the elastomeric preparation of TPSiV, be dispersed in polyolefine or the polybutylene terephthalate resin with silicone gum (or filled silicon rubber sizing material), make described sizing material dynamic vulcanization therein by the hydrosilation curing system then.Though above-mentioned patent disclosure some formula techniques of thermoplastic silicone elastomers, its flame retardant resistance is all lower, general oxygen index is all less than 22.
Along with consideration to safe handling, people begin the performance of the fire-retardant aspect of thermoplastic silicone elastomers is studied, Chinese patent application number is that 200310106228.0 document discloses a kind of dynamic vulcanization fire retardant EPT rubber/thermoplastic elastomer, it mainly is by terpolymer EP rubber (EPDM), polypropylene (PP), cross-linking system, flame-retardant system, weighting material, softening agent and auxiliary agent are formed, and through the preparation of twin screw extruder dynamic vulcanization extruding pelletization and get, though the oxygen index of this thermoplastic elastomer (OI) reaches as high as 32, but its flame-retardant system has been used bromide, and is friendly inadequately to environment.And Chinese patent application number is 00310112701.6, a kind of halogen-free flameproof dynamic vulcanization EPT rubber/thermoplastic elastomer is also disclosed, it mainly is made up of terpolymer EP rubber (EPDM), polypropylene (PP), linking agent, halogen-free flame-retardant system, softening agent and auxiliary agent, and process forcing machine dynamic vulcanization extruding pelletization makes, though used halogen-free flame-retardant system, but its oxygen index is up to 30, and its flame retardant effect is relative still lower, can not accomplish safety very.
Summary of the invention
In order to address the above problem, one of purpose of the present invention is, a kind of dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic is provided.
Another object of the present invention is, the preparation method of above-mentioned dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic is provided; This is invented, and not only preparation technology is simple, and with low cost.
The present invention is achieved through the following technical solutions:
A kind of dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic, its raw material comprise the following component of calculating by weight:
100 parts of methyl vinyl silicon kautschuks;
50～100 parts of polyolefin resines;
10～50 parts of white carbon blacks;
100～200 parts of halogen-free flame-retardant systems;
1～5 part of expanding material;
1～2 part in oxidation inhibitor;
1～3 part of linking agent;
0.5～1 part of silane coupling agent;
1～5 part of hydroxy silicon oil;
Wherein, described methyl vinyl silicon kautschuk, the molar fraction of its vinyl is 0.05%～0.5%.
Described polyolefin resin is one or more the mixture in new LDPE (film grade) (LDPE), linear low density polyethylene (LLDPE), high density polyethylene(HDPE) (HDPE) or the polypropylene (PP).
Described white carbon black is thermal silica or precipitated silica.
Described linking agent is di-t-butyl peroxide (DTBP), dicumyl peroxide (DCP) or 2,5-dimethyl-2, the one or more combination thing in the 5-di-t-butyl hexane peroxide (DBPMH).
Described silane coupling agent is the one or more combination thing in Union carbide A-162, vinyltriethoxysilane, γ-(methacryloxypropyl) propyl trimethoxy silicane, γ-(2,3-epoxy third oxygen) propyl trimethoxy silicane.
Described expanding material is a silane grafted polyolefin resin, as: silane grafting LDPE, silane grafting LLDPE or silane grafting HDPE etc.
Preferably, described halogen-free flame-retardant system is the compound of aluminium hydroxide and zinc borate, melamine cyanurate or micro encapsulation red phosphorus, and the components by weight of this system is:
100 parts in aluminium hydroxide;
0～20 part in zinc borate, melamine cyanurate or micro encapsulation red phosphorus.
Described halogen-free flame-retardant system is the compound of magnesium hydroxide and zinc borate, melamine cyanurate or micro encapsulation red phosphorus, and the components by weight of this system is:
100 parts of magnesium hydroxides;
0～20 part in zinc borate, melamine cyanurate or micro encapsulation red phosphorus.
Described halogen-free flame-retardant system is the compound of aluminium hydroxide and magnesium hydroxide and zinc borate, melamine cyanurate or micro encapsulation red phosphorus, and the components by weight of this system is:
100 parts of aluminium hydroxide and magnesium hydroxides;
0～20 part in zinc borate, melamine cyanurate or micro encapsulation red phosphorus;
Weight ratio between described aluminium hydroxide and the magnesium hydroxide 1: 0.2～1.
Preferably, described oxidation inhibitor is four [methyl-β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol ester or β-positive octadecanol esters of (3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid.
Described oxidation inhibitor is four [methyl-β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol ester or β-(3, the 5-di-tert-butyl-hydroxy phenyl) the positive octadecanol ester of propionic acid is 1～2: 1 compound with three [2, the 4-di-tert-butyl-phenyl] phosphorous acid ester respectively by weight.
The preparation method of dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic comprises being prepared as follows step:
A, with raw-silastic continuously, white carbon black, fire retardant, hydroxy silicon oil, silane coupling agent in kneader 150 ± 5 ℃ mixing evenly, make rubber unvulcanizate I;
B, add linking agent in rubber unvulcanizate I, twin-roll mixing under the normal temperature makes mixtures II;
C, polyolefine, expanding material and oxidation inhibitor high-speed mixing is even makes mixtures III;
D, the main spout of mixtures III from parallel dual-screw extruding machine added, mixtures II is forced to feed by second district of rubber extruding machine from parallel dual-screw extruding machine, through parallel dual-screw extruding machine dynamic vulcanization extruding pelletization, make halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic.
The length-to-diameter ratio L/D of described parallel dual-screw extruding machine is more than 42, the extrusion temperature of twin screw extruder is: 120 ℃～160 ℃ of feeding sections, 160 ℃～190 ℃ of compression sections, 180 ℃～220 ℃ of homogenizing zones, 180 ℃～220 ℃ of machine head port mould parts, screw speed is 100～400r/min.
The present invention is counted by weight percentage, and comprises 100 parts of silicon rubber, 50～100 parts of polyolefine, 10～50 parts of white carbon blacks, 100～200 parts of halogen-free flame retardantss, 1～5 part of expanding material, 1～2 part of oxidation inhibitor, 1～3 part of linking agent, 1～5 part of hydroxy silicon oil, 0.5～1 part of silane coupling agent; The present invention can be widely used in automobile, electric, cable and wire, medicine equipment, various fields such as building decoration, since the halogen-free flame retardants among the present invention be aluminium hydroxide and (or) magnesium hydroxide and zinc borate, the compound of melamine cyanurate or micro encapsulation red phosphorus, employed oxidation inhibitor is four [methyl-β-(3 simultaneously, the 5-di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol ester, β-(3, the 5-di-tert-butyl-hydroxy phenyl) the positive octadecanol ester of propionic acid or they are respectively with three [2, the 4-di-tert-butyl-phenyl] compound of 1～2: 1 ratio of phosphorous acid ester, make the present invention not only not halogen-containing, environmentally friendly, and good flame retardation effect, its oxygen index reaches as high as 38.
Concrete embodiment
The present invention is described in further detail below in conjunction with embodiment, understands the present invention to help those skilled in the art.
Embodiment 1
A kind of dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic, its raw material comprise the following component of calculating by weight:
100 parts of methyl vinyl silicon kautschuks, 70 parts of new LDPE (film grade)s, 40 parts of thermal silicas, 170 parts in aluminium hydroxide, 2 parts of pentaerythritol esters of silane grafting LDPE2 part, four [methyl-β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic ester], 3 parts of di-t-butyl peroxides, 1 part of Union carbide A-162,2 parts of hydroxy silicon oils.
The preparation method comprises being prepared as follows step:
A, with raw-silastic continuously, white carbon black, fire retardant, hydroxy silicon oil, silane coupling agent in kneader 150 ± 2 ℃ mixing evenly, make rubber unvulcanizate I;
B, add linking agent in rubber unvulcanizate I, twin-roll mixing under the normal temperature makes mixtures II;
C, polyolefine, expanding material and oxidation inhibitor high-speed mixing is even makes mixtures III;
D, the main spout of mixtures III from parallel dual-screw extruding machine added, mixtures II is forced to feed by second district of rubber extruding machine from parallel dual-screw extruding machine, through parallel dual-screw extruding machine dynamic vulcanization extruding pelletization, make halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic.
The extrusion temperature of described parallel dual-screw extruding machine is: 120 ℃ of feeding sections, and 160 ℃ of compression sections, 190 ℃ of homogenizing zones, 190 ℃ of machine head port mould parts, screw speed is 200r/min.
Embodiment 2
100 parts of methyl vinyl silicon kautschuks, 100 parts of high density polyethylene(HDPE)s, 10 parts of precipitated silicas, 200 parts of magnesium hydroxides, silane grafting LLDPE1 part, β-1.5 parts of the positive octadecanol esters of (3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid,, 3 parts of dicumyl peroxides, γ-0.5 part of (methacryloxypropyl) propyl trimethoxy silicane, 5 parts of hydroxy silicon oils.
The preparation method is with embodiment 1, and wherein, the extrusion temperature of described parallel dual-screw extruding machine is: 160 ℃ of feeding sections, and 190 ℃ of compression sections, 220 ℃ of homogenizing zones, 220 ℃ of machine head port mould parts, screw speed is 400r/min.
Embodiment 3
100 parts of methyl vinyl silicon kautschuks, 60 parts of polyolefin resines (wherein, olefin resin is the composition of 40 parts of 20 parts of linear low density polyethylenes and high density polyethylene(HDPE)s), 10 parts of thermal silicas, 120 parts (halogen-free flame-retardant system is the compound of aluminium hydroxide and micro encapsulation red phosphorus to halogen-free flame-retardant system, wherein: 100 parts in aluminium hydroxide, 20 parts in micro encapsulation red phosphorus), 5 parts of expanding materials (expanding material is the composition of silane grafting LDPE1 part and silane grafting LLDPE4 part), 1 part (oxidation inhibitor is four [methyl-β-(3 to oxidation inhibitor, the 5-di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol ester and three [2, the 4-di-tert-butyl-phenyl] compound of 1: 1 ratio of phosphorous acid ester), 1 part (linking agent is 0.8 part of dicumyl peroxide and 2 to linking agent, 5-dimethyl-2, the composition that the 5-di-t-butyl hexane peroxide is 0.2 part, 0.5 part of silane coupling agent (silane coupling agent is the composition of 0.4 part of 0.1 part of vinyltriethoxysilane and γ-(2,3-epoxy third oxygen) propyl trimethoxy silicane), 2.5 parts of hydroxy silicon oils.
The preparation method is with embodiment 1, and wherein, the extrusion temperature of described parallel dual-screw extruding machine is: 140 ℃ of feeding sections, and 180 ℃ of compression sections, 185 ℃ of homogenizing zones, 190 ℃ of machine head port mould parts, screw speed is 250r/min.
Embodiment 4
100 parts of methyl vinyl silicon kautschuks, 80 parts of polyolefin resines (wherein, olefin resin is 10 parts of new LDPE (film grade)s, 10 parts of linear low density polyethylenes, the composition that 40 parts of high density polyethylene(HDPE)s and polypropylene are 20 parts), 20 parts of precipitated silicas, 150 parts of halogen-free flame-retardant systems (halogen-free flame-retardant system is 70 parts in aluminium hydroxide and magnesium hydroxide 70 and the compound of 10 parts of melamine cyanurates), 1.3 parts (expanding material is silane grafting LDPE0.5 part to expanding material, the composition of silane grafting LLDPE0.5 part and silane grafting HDPE0.3 part), 2 parts (oxidation inhibitor is β-(3 to oxidation inhibitor, the 5-di-tert-butyl-hydroxy phenyl) the positive octadecanol ester of propionic acid and three [2, the 4-di-tert-butyl-phenyl] compound of 2: 1 ratios of phosphorous acid ester), 1 part (linking agent is 0.2 part of a di-t-butyl peroxide to linking agent, 0.2 part of dicumyl peroxide and 2,5-dimethyl-2, the composition that the 5-di-t-butyl hexane peroxide is 0.6 part), 0.7 part (silane coupling agent is 0.1 part of a vinyltriethoxysilane to silane coupling agent, the composition that γ-0.1 part of (methacryloxypropyl) propyl trimethoxy silicane and γ-(2,3-epoxy third oxygen) propyl trimethoxy silicane are 0.5 part), 5 parts of hydroxy silicon oils.
The preparation method is with embodiment 1, and wherein, the extrusion temperature of described parallel dual-screw extruding machine is: 130 ℃ of feeding sections, and 170 ℃ of compression sections, 180 ℃ of homogenizing zones, 180 ℃ of machine head port mould parts, screw speed is 100r/min.
Embodiment 5
100 parts of methyl vinyl silicon kautschuks, 50 parts of polypropylene, 50 parts of thermal silicas, 100 parts (halogen-free flame-retardant system is 70 parts in an aluminium hydroxide to halogen-free flame-retardant system, the compound that 20 parts of magnesium hydroxides and zinc borate are 10 parts), 3 parts of expanding materials (solubilizing agent is the composition of silane grafting LDPE0.2 part and silane grafting HDPE2.8 part), four [methyl-β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic ester] 1.2 parts of pentaerythritol esters, 2,5-dimethyl-2,2 parts of 5-di-t-butyl hexane peroxides, 0.8 part of γ-(2,3-epoxy third oxygen) propyl trimethoxy silicane, 3 parts of hydroxy silicon oils.
The preparation method is with embodiment 1, and wherein, the extrusion temperature of described parallel dual-screw extruding machine is: 145 ℃ of feeding sections, and 175 ℃ of compression sections, 185 ℃ of homogenizing zones, 200 ℃ of machine head port mould parts, screw speed is 300r/min.
Embodiment 6
100 parts of methyl vinyl silicon kautschuks, 90 parts of polyolefin resines (olefin resin is a linear low density polyethylene), 15 parts of thermal silicas, 185 parts of halogen-free flame-retardant systems (halogen-free flame-retardant system is 160 parts of magnesium hydroxides and the compound of 25 parts of melamine cyanurates), silane grafting LLDPE4 part, 1 part (oxidation inhibitor is β-(3 to oxidation inhibitor, the 5-di-tert-butyl-hydroxy phenyl) the positive octadecanol ester of propionic acid and three [2, the 4-di-tert-butyl-phenyl] compound of 1.5: 1 ratios of phosphorous acid ester), 2,5-dimethyl-2,1 part of 5-di-t-butyl hexane peroxide, 0.9 part of silane coupling agent (silane coupling agent is the composition of 0.8 part of γ-0.1 part of (methacryloxypropyl) propyl trimethoxy silicane and γ-(2,3-epoxy third oxygen) propyl trimethoxy silicane), 3.1 parts of hydroxy silicon oils.
The preparation method is with embodiment 1, and wherein, the extrusion temperature of described parallel dual-screw extruding machine is: 150 ℃ of feeding sections, and 185 ℃ of compression sections, 210 ℃ of homogenizing zones, 210 ℃ of machine head port mould parts, screw speed is 350r/min.
The foregoing description is preferred embodiment of the present invention, is not to be used for limiting the scope of the present invention, so all equivalences of being done with described feature of claim of the present invention and principle change or modify, all should be included within the claim scope of the present invention.
The product that obtains after testing, the gained performance data sees Table 1.
Table 1
As can be seen from Table 1, through detecting, among the present invention the oxygen index of embodiment minimum be 32, be up to 38, visible the present invention is when guaranteeing other performance index, flame retardant resistance is very good.
Claims (10)
1. a dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic is characterized in that, its raw material comprises the following component of calculating by weight:
100 parts of methyl vinyl silicon kautschuks;
50～100 parts of polyolefin resines;
10～50 parts of white carbon blacks;
100～200 parts of halogen-free flame-retardant systems;
1～5 part of expanding material;
1～2 part in oxidation inhibitor;
1～3 part of linking agent;
0.5～1 part of silane coupling agent;
1～5 part of hydroxy silicon oil;
Described polyolefin resin is one or more the mixture in new LDPE (film grade), linear low density polyethylene, high density polyethylene(HDPE) or the polypropylene; Described white carbon black is thermal silica or precipitated silica; Described expanding material is a silane grafted polyolefin resin; Described linking agent is di-t-butyl peroxide, dicumyl peroxide, 2,5-dimethyl-2, the one or more combination thing in the 5-di-t-butyl hexane peroxide.
2. dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic according to claim 1 is characterized in that, described methyl vinyl silicon kautschuk, and the molar fraction of its vinyl is 0.05%～0.5%.
3. dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic according to claim 1, it is characterized in that, described halogen-free flame-retardant system is the compound of aluminium hydroxide and zinc borate, melamine cyanurate or micro encapsulation red phosphorus, and the components by weight of this system is:
100 parts in aluminium hydroxide;
0～20 part in zinc borate, melamine cyanurate or micro encapsulation red phosphorus.
4. dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic according to claim 1, it is characterized in that, described halogen-free flame-retardant system is the compound of magnesium hydroxide and zinc borate, melamine cyanurate or micro encapsulation red phosphorus, and the components by weight of this system is:
100 parts of magnesium hydroxides;
0～20 part in zinc borate, melamine cyanurate or micro encapsulation red phosphorus.
5. dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic according to claim 1, it is characterized in that, described halogen-free flame-retardant system is the compound of aluminium hydroxide and magnesium hydroxide and zinc borate, melamine cyanurate or micro encapsulation red phosphorus, and the components by weight of this system is:
100 parts of aluminium hydroxide and magnesium hydroxides;
0～20 part in zinc borate, melamine cyanurate or micro encapsulation red phosphorus;
Weight ratio between described aluminium hydroxide and the magnesium hydroxide 1: 0.2～1.
6. dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic according to claim 1, it is characterized in that, described oxidation inhibitor is four [methyl-β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol ester or β-positive octadecanol ester of (3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid.
7. dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic according to claim 1, it is characterized in that, described oxidation inhibitor is four [methyl-β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol ester or β-(3, the 5-di-tert-butyl-hydroxy phenyl) the positive octadecanol ester of propionic acid is 1～2: 1 compound with three [2, the 4-di-tert-butyl-phenyl] phosphorous acid ester respectively by weight.
8. dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic according to claim 1, it is characterized in that, described silane coupling agent is the one or more combination thing in Union carbide A-162, vinyltriethoxysilane, γ-(methacryloxypropyl) propyl trimethoxy silicane, γ-(2,3-epoxy third oxygen) propyl trimethoxy silicane.
9. the preparation method of a dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic as claimed in claim 1 is characterized in that, comprises being prepared as follows step:
A, with raw-silastic continuously, white carbon black, fire retardant, hydroxy silicon oil, silane coupling agent in kneader 150 ± 5 ℃ mixing evenly, make rubber unvulcanizate I;
B, add linking agent in rubber unvulcanizate I, twin-roll mixing under the normal temperature makes mixtures II;
C, polyolefine, expanding material and oxidation inhibitor high-speed mixing is even makes mixtures III;
D, the main spout of mixtures III from parallel dual-screw extruding machine added, mixtures II is forced to feed by second district of rubber extruding machine from parallel dual-screw extruding machine, through parallel dual-screw extruding machine dynamic vulcanization extruding pelletization, make halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic.
10. the preparation method of described dynamic vulcanization halogen-free anti-flaming silicon rubber/Thermoplastic Elastomer, Olefinic according to claim 9, it is characterized in that, the extrusion temperature of twin screw extruder described in the step D is: 120 ℃～160 ℃ of feeding sections, 160 ℃～190 ℃ of compression sections, 180 ℃～220 ℃ of homogenizing zones, 180 ℃～220 ℃ of machine head port mould parts, screw speed is 100～400r/min.
Priority Applications (1)
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