CN101033325A - Thermoplastic elastomer compositions and preparation method thereof - Google Patents
Thermoplastic elastomer compositions and preparation method thereof Download PDFInfo
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- CN101033325A CN101033325A CNA2006100114436A CN200610011443A CN101033325A CN 101033325 A CN101033325 A CN 101033325A CN A2006100114436 A CNA2006100114436 A CN A2006100114436A CN 200610011443 A CN200610011443 A CN 200610011443A CN 101033325 A CN101033325 A CN 101033325A
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Abstract
The invention relates to a thermoplastic elastic compound and its preparation method, which includes: class 3 hydrogenated styrene block copolymer, polypropylene, maleic anhydride grafted copolymer, paraffin oil, antioxidant, CTBN, structure rheological control agent and inorganic filler. Its preparation method: firstly, it dries the inorganic with coupling, and then, it puts other components into the material, mixing, melt mixing, and it cools the mixture into a solid material in the water tank, and then, it cuts and packs the material for preservation.
Description
Technical field
The present invention relates to a kind of composition for thermoplastic elastomer, relate in particular to a kind of handle for tool, cooker handle, sports goods of being used for and the Overmolded elastic composition of secondary such as hold.
Another purpose of the present invention is to provide the method for preparing above-mentioned composition.
Technical background
Along with increasing rapidly of Chinese economic development and foreign trade, China has become products export big country, particularly household electrical appliance such as dishwasher, washing machine, air-conditioning, refrigerator, gasket of suction cleaner and other household electrical appliance (bar) and component, sports goods such as golf club handle, handle of bicycle, the racket handgrip, the tennis racket handgrip, skiing equipment handgrip, the excellent handgrip of skating, frog footwear, frog mirror, respiratory siphon, headband, the ice skate brake facing, the elbow protector for sports sheet, chest expanding bar and other various sports equipment handgrips, household supplies such as cutter handgrip, the comb handgrip, the scissors handgrip, door and window sealing strip, the tea pad, the bathroom sliding-proof pad, door handle of refrigerator, instrument for defecation, toilet sealing valve, water pipe, the suitcase handle, the knapsack base, the handbag base, school bag backpiece pad, foot board, stair non-slip nosing etc., instrument articles for use such as various craft and power tool handgrip, various garden tool handgrips etc., medical device such as bottle stopper, inhale ball, Mi Sai, the mouth mask band, the eyes attachment of nose bridge pad, syringe is annotated plug, medical device handgrip etc., shoe-making industry such as heel, toe-cap, the low group's footwear material that draws in the high rigidity, transparent footwear material etc., toy industry such as wheel, handle, pipeline, transport tape etc., up to hundred million dollars of hundreds ofs, be the integral part of China's products export to American-European export amount every year.These products all will use soft plastics or elastomeric material.The nonrigid plastic that the present most products of China use is SPVC (flexible PVC), and this material contains some heavy metals such as lead etc. and a large amount of phthalate materials.And the European just new environmental regulation of these materials is forbidden, so all China these products all are faced with and are eliminated, return goods and quit the subscription of single problem.German maximum supermarket Aldi announces as: on June 17th, 2005, has found so-called dense carcinogenic substance in the soft handle sheath of 4 cover hammers of middle home made article black that they sell, English be PAH ' s (
Polycyclic Aromatic Hydrocarbon, polycyclic aromatic hydrocarbons).This shipments is that Shandong produces, and amounts to nearly 1,000,000 dollars goods and all withdraws from from all markets of aldi, announces all human consumers that buy this product simultaneously and can freely replace.
In order to preserve the ecological environment; on February 13rd, 2003; European Union has announced two instruction: WEEE (depleted Electrical and Electronic device), RoHS (restriction uses its waste can produce some material of objectionable impurities in the Electrical and Electronic device); instruction regulation must be at depleted in the electronic product such as electric or electronic equipment, bans use of six kinds of hazardous materials: materials such as lead, sexavalent chrome, cadmium, polychlorobiphenyl, halogenated fire-retardants, radioactive substance, asbestos.On July 1st, 2006 was last execution date.In order to observe two instructions of European Union, must be to elastomer material change or improvement, and adopt the novel environment-friendly elastomer material.Therefore exploitation and production Halogen, no antimony, heavy metal free, no multiring aromatic hydrocarbon substance, the environmental type high-performance of no phthalate material, low-cost elastomer material are eager and necessary.
Summary of the invention
The object of the present invention is to provide a kind of composition for thermoplastic elastomer.This elastomerics has good flowability, high and binding propertys matrix resins such as PP and ABS, nylon, excellent feel, objectionable impuritiess such as not halogen-containing, phosphorus, antimony, not Halogen belong to, not phosphorous, do not contain antimony, do not contain heavy metal, do not contain the phthalate material, do not contain polycyclic aromatic hydrocarbons, be new green environment protection type high performance material, be used for the quadric injection mould moulding of handle for tool etc.
Another purpose of the present invention is to provide a kind of method for preparing above-mentioned composition.
For achieving the above object, composition for thermoplastic elastomer provided by the invention by mass parts, comprising:
20～100 parts of hydrogenated styrene analog triblock copolymers
20～100 parts of polypropylene (PP)
20～150 parts of whiterusss
5～25 parts of maleic anhydride graft copolymers
0.1～5 part of white carbon black
0.1～10 part of liquid end group butadienecopolymer
1～50 part of mineral filler
0.1～5 part of silane coupling agent
0.1～5 part in oxidation inhibitor
Structure rheology control agent 0.01～10
Wherein, the hydrogenated styrene analog triblock copolymer comprises vinylbenzene-hydrogenated butadiene-styrene triblock copolymer (SEBS), styrene-ethylene-propylene-styrene segmented copolymer (SEPS).SEBS and SEPS this as thermoplastic elastomer with superperformance, but because it be a powdery, difficultly directly carry out injection molding, need the granulation modification; In addition, SEBS, SEPS hardness are higher, need utilize modification to regulate hardness, to adapt to different environments for use; Also have, the cohesiveness of matrix resins such as SEBS, SEPS and PP is also not high, needs to improve; Simultaneously, SEBS, SEPS price are too high, in general products such as instrument class the application cost increase too high, the user can't accept.Therefore SEBS, SEPS being improved processing is one of effective ways of preparation high-performance, environment protection elastic body composition.
The present invention has used polypropylene simultaneously, comprises homo-polypropylene, atactic copolymerized polypropene, block copolymerization polypropylene, and melting index (MI) is injection stage or extrusion grade within 3～15g/10min; After using polypropylene, the one, can improve the tensile strength and the tear strength of elastic composition, the 2nd, improve and the binding property of PP (because be the biphasic injection of base material coat resilient material be the most frequently used and consumption maximum) with PP, the 3rd, reduce cost.
The whiteruss that the present invention uses comprises white mineral oil, white oil, and kinematic viscosity is 10～1000 lis and drags (cST) under the room temperature; Can improve the flowability and the flexibility of composition behind the filling liquid paraffin greatly, improve the processibility of composition, give excellent feel, also greatly reduce the cost of composition simultaneously.
The maleic anhydride graft copolymer that the present invention uses comprises: polypropylene grafted maleic anhydride multipolymer, ABS (acrylonitrile-butadiene-styrene copolymer) grafted maleic anhydride, POE (ethene-1-octene copolymer) grafted maleic anhydride, EPDM (terpolymer EP rubber) grafted maleic anhydride, PS (polystyrene) grafted maleic anhydride, SEBS grafted maleic anhydride, and maleic anhydride grafting ratio is 0.5～10%; The main purpose of using maleic anhydride grafted polymer is to improve the bounding force of composition and nylon, ABS isopolarity polymkeric substance.
The bounding force promotor that the present invention uses also has liquid end group butadienecopolymer to comprise: liquid nbr carboxyl terminal (CTBN), Liquid Hydroxyl-Terminated Polybutadiene (HTPB), liquid carboxy terminated polybutadiene (CTPB).
The present invention uses silane coupling agent that surface treatment is carried out in mineral filler, and employed silane coupling agent is: γ-(2, the 3-glycidoxy) propyl trimethoxy silicane (KH-560), γ-An Jibingjisanyiyangjiguiwan (KH-550) or azide silane.Owing to contain epoxy group(ing), amino isoreactivity group in the silane coupling agent, these groups can (OH) react with the hydroxyl of inorganic filler surface, thereby improve the bounding force of silicon powder and Resins, epoxy greatly, improve physics, mechanical property and the thermal characteristics of moulding compound, also improve the water tolerance of moulding compound simultaneously greatly.Its mechanism of action is:
The oxidation inhibitor that the present invention uses comprises: phenolic antioxidant 1010 and phosphite ester kind antioxidant 168, and composite use, the two ratio are 1: 1～1: 4; Antioxidant 1010 is a primary antioxidant, can catch the free radical that degradation with aging and thermal-oxidative degradation produce, thereby plays the effect of oxidation inhibitor; Phosphite antioxidant 168 is an auxiliary antioxidant, and the two uses simultaneously has synergistic effect, improves greatly than the effect of the two independent use.
The structure rheology control agent that the present invention uses comprises: dicumyl peroxide (DCP), ethene-acetic acid (acetate) ethylene copolymer (EVA), triallyl triisocyanate (TAIC), glycidyl acrylate (GMA), Tributyl phosphate ester; By in the extruding pelletization process, forming the interchain polymkeric substance, thereby improve the consistency between each polymkeric substance, reach the purpose that improves the composition over-all properties.
Preparation method provided by the invention comprises mixing, melting mixing, cooling, pelletizing, packing, warehouse-in preservation of surface treatment, the component of mineral filler etc.Main process is: mineral filler is handled in mixing machine with coupling agent, mixed 1-2 minute earlier, left standstill 2-5 minute again, carry out repeatedly so repeatedly, to improve the surface treatment effect of mineral filler greatly; Add other component then in proportion, mixed 3-5 minute, with the mixture melting mixing, melting temperature 150-210 ℃, mixing time 3-5 minute; After the product cooling, pelletizing, packing is deposited below 25 ℃.
The present invention adopts the twin screw extruder melting mixing, adopts and mediates co-rotating twin screw extruder, and its length-to-diameter ratio is 32～40.
Environmental type high performance elastomer composition provided by the invention can use the molded coating of carrying out handle for tool, sports goods handle etc. of secondary, and processibility is good.Its characteristics are:
1) do not contain PAHs, do not contain heavy metal (lead, cadmium, mercury, caesium, chromium etc.), do not contain the phthalate material, meet the requirement of the new environmental regulation in Europe, elasticity and feel and high P/C ratio with excellent moulding processability, excellence, make China's exported product satisfy the requirement of European environmental regulation, and the cost raising is few, still keeps bigger competitive power.
2) SEBS, SEPS are carried out graft modification, make it the interface of matrix material is controlled, improve the interface adhesion of matrix material, the structure that reaches matrix material becomes more meticulous and controlledization, with the less bigger effect of consumption performance;
3) in order to improve the binding property of materials such as elastomer material and PP, ABS, nylon, need to add bounding force promotor, the synthetic of such bounding force promotor is key problem in technology and difficult point;
4) constituent optimization of composition: synthetic and to use the component that does not contain PAHs, does not contain heavy metal, do not contain the phthalate material be the key of preparation environment-friendly type novel elastomer material;
5) cost degradation of composition;
6) complete processing of novel compositions: novel material is used widely, must has good processibility, factory just likes using like this.This project is by adding the composite highly effective oiling system, and preparation has material high workability, excellent in workability.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Describe technical characterictic of the present invention and its effect below for example in detail, but do not mean that constraint the present invention, protection scope of the present invention is as the criterion with the claim of application.
The typical performance such as the table 1 of composition for thermoplastic elastomer of the present invention:
Table 1
The physicals resin
Density 0.9～1.0g/cm
3
100% stress at definite elongation 3.9MPa
Melting index 13.5g/10min
Hardness, Shao Shi A 40～85
Fracture tensile strength 6.6MPa
Elongation at break 530%
The continuous No-break of low temperature notched shock strength
Tear strength, 23 ℃ of 109kN/m
Abrasion, mg/1000Cycles 26
75 ℃ of maximum operation (service) temperatures
Processing temperature 175-240 ℃
Embodiment 1
Prescription:
100 parts of SEBS 3151 (Taiwan rubber company)
50 parts of polypropylene (PP) (K1003, Beijing Yanshan Petrochemical)
150 parts of whiterusss (Kelamayi, Xinjiang refinery)
5 parts of maleic anhydride graft PP multipolymers (self-control)
1 part of white carbon black
0.5 part of liquid CTBN (Zibo two imperial chemical industry company limited)
5 parts of talcum powder (1200 orders, Yunnan superfine material company limited)
0.1 part of silane coupling agent KH-560 (Wuhan University chemical plant)
0.1 part of antioxidant 1010 (Beijing Chemical Factory No. 3)
0.2 part in oxidation inhibitor 168 (Beijing Chemical Factory No. 3)
2 parts of EVA (4055, French Instituut Voor Agrotechnologisch Onderzoek (ATO-DLO))
0.8 part of stearic acid
Technology is seen Fig. 1.
Performance sees Table 2:
| Physicals | Examination criteria | Unit | Performance | The SPVC performance |
| Density melt index hardness; The abrasion of Shore A fracture tensile strength elongation at break tensile set, the caking property cost environment-friendly type of the caking property of mg/1000 Cycles and PP and the caking property of ABS and nylon | ASTM D792 210℃/2.16kg ASTM D2240 ASTM D412 ASTM D412 CS-17 Wheel， 1000g； ASTM D1044 | g/cm 3 g/10min MPa ％ ％ | 0.96 the low environmental protection of 16 55 6.8 600 10 25 excellent middle differences | Low not environmental protection during 1.1 14 55 5.5 550 20 differences are excellent |
Embodiment 2
Prescription:
100 parts of SEBS 3151 (Taiwan rubber company)
30 parts of polypropylene (PP) (K1003, Beijing Yanshan Petrochemical)
150 parts of whiterusss (Kelamayi, Xinjiang refinery)
25 parts of maleic anhydride grafted ABS multipolymers (self-control)
1 part of white carbon black
5 parts of liquid CTBN (Zibo two imperial chemical industry company limited)
5 parts of talcum powder (1200 orders, Yunnan superfine material company limited)
0.1 part of silane coupling agent KH-560 (Wuhan University chemical plant)
0.1 part of antioxidant 1010 (Beijing Chemical Factory No. 3)
0.3 part in oxidation inhibitor 168 (Beijing Chemical Factory No. 3)
1 part of EVA (4055, French Instituut Voor Agrotechnologisch Onderzoek (ATO-DLO))
0.8 part of stearic acid
Technology such as Fig. 1.
Performance sees Table 3:
| Physicals | Examination criteria | Unit | Performance | The SPVC performance |
| Density melt index hardness; The abrasion of Shore A fracture tensile strength elongation at break tensile set, the caking property cost environment-friendly type of the caking property of mg/1000 Cycles and PP and the caking property of ABS and nylon | ASTM D792 210℃/2.16kg ASTM D2240 ASTM D412 ASTM D412 CS-17 Wheel， 1000g； ASTM D1044 | g/cm 3 g/10min MPa ％ ％ | 0.95 13 50 7.2 548 12 27 good good in low environmental protection | Low not environmental protection during 1.1 14 55 5.5 550 20 differences are excellent |
Embodiment 3
Prescription:
100 parts of SEBS (Kraton 1650, U.S. Shell company)
20 parts of polypropylene (PP) (K1003, Beijing Yanshan Petrochemical)
150 parts of whiterusss (Kelamayi, Xinjiang refinery)
8 parts of maleic anhydride graft SEBS multipolymers (Kraton 1901, U.S. Shell company)
25 parts of maleic anhydride graft PP (self-control)
1 part of white carbon black
5 parts of liquid HTPB (Zibo two imperial chemical industry company limited)
3 parts in lime carbonate (1200 orders, Yunnan superfine material company limited)
0.1 part of silane coupling agent KH-560 (Wuhan University chemical plant)
0.1 part of antioxidant 1010 (Beijing Chemical Factory No. 3)
0.3 part in oxidation inhibitor 168 (Beijing Chemical Factory No. 3)
0.1 part of dicumyl peroxide (DCP)
0.2 part of triallyl triisocyanate (TAIC)
2 parts of glycidyl acrylates (GMA)
0.5 part of stearic acid
Technology such as Fig. 1.
Performance sees Table 4:
| Physicals | Examination criteria | Unit | Performance | The SPVC performance |
| Density melt index hardness; The abrasion of Shore A fracture tensile strength elongation at break tensile set, the caking property of mg/1000 Cycles and PP | ASTM D792 210℃/2.16kg ASTM D2240 ASTM D412 ASTM D412 CS-17 Wheel， 1000g； ASTM D1044 | g/cm 3 g/10min MPa ％ ％ | 0.95 10 52 8.1 550 14 25 is good | 1.1 14 55 5.5 550 20 is poor |
| With the cohesiveness of ABS and the cohesiveness cost environment-friendly type of nylon | Environmental protection in excellent | Low not environmental protection in excellent |
Claims (13)
1, a kind of composition for thermoplastic elastomer comprises following composition, by mass parts:
20～100 parts of hydrogenated styrene analog triblock copolymers
20～100 parts of polypropylene (PP)
20～150 parts of whiterusss
5～25 parts of maleic anhydride graft copolymers
0.1～5 part of white carbon black
0.1～10 part of liquid end group butadienecopolymer
1～50 part of mineral filler
0.1～5 part of silane coupling agent
0.1～5 part in oxidation inhibitor
Structure rheology control agent 0.01～10.
2, composition as claimed in claim 1, wherein the hydrogenated styrene analog triblock copolymer comprises vinylbenzene-hydrogenated butadiene-styrene triblock copolymer (SEBS) or styrene-ethylene-propylene-styrene segmented copolymer (SEPS).
3, composition as claimed in claim 1, wherein polypropylene comprises homo-polypropylene, atactic copolymerized polypropene or block copolymerization polypropylene, melting index (MI) is injection stage or extrusion grade within 3～15g/10min.
4, composition as claimed in claim 1, wherein silane coupling agent is γ-(2, the 3-glycidoxy) propyl trimethoxy silicane, γ-An Jibingjisanyiyangjiguiwan or azide silane.
5, composition as claimed in claim 1, wherein whiteruss comprises white mineral oil or white oil, kinematic viscosity is 10～1000 lis and drags (cST) under the room temperature.
6, composition as claimed in claim 1, wherein maleic anhydride graft copolymer comprises: polypropylene grafted maleic anhydride multipolymer, ABS (acrylonitrile-butadiene-styrene copolymer) grafted maleic anhydride, POE (ethene-1-octene copolymer) grafted maleic anhydride, EPDM (terpolymer EP rubber) grafted maleic anhydride, PS (polystyrene) grafted maleic anhydride or SEBS grafted maleic anhydride, maleic anhydride grafting ratio is 0.5～10%.
7, composition as claimed in claim 1, wherein liquid end group butadienecopolymer comprises: liquid nbr carboxyl terminal (CTBN), Liquid Hydroxyl-Terminated Polybutadiene (HTPB) or liquid carboxy terminated polybutadiene (CTPB).
8, composition as claimed in claim 1, wherein mineral filler comprises: lime carbonate, talcum powder, clay or hollow glass microbead, fineness are more than 800 orders, below 5000 orders.
9, composition as claimed in claim 1, wherein oxidation inhibitor comprises: phenolic antioxidant 1010 and phosphite ester kind antioxidant 168, and composite use, the two ratio are 1: 1～1: 4.
10, composition as claimed in claim 1, wherein the structure rheology control agent comprises: dicumyl peroxide (DCP), ethene-acetic acid (acetate) ethylene copolymer (EVA), triallyl triisocyanate (TAIC), glycidyl acrylate (GMA) or Tributyl phosphate ester.
11, the method for preparing the described composition for thermoplastic elastomer of claim 1, its main process is:
Mineral filler and coupling agent were handled in mixing machine 3-5 minute, added other component then, mixed 3-5 minute, with the mixture melting mixing, 150～220 ℃ of melting temperatures, mixing time 3-5 minute; Product cooling, pelletizing, packing, warehouse-in.
12, method as claimed in claim 11, wherein mineral filler mixed 1-2 minute earlier in mixing machine with coupling agent, left standstill 2-5 minute again, carried out repeatedly repeatedly.
13, method as claimed in claim 11, wherein melting mixing is to adopt to mediate co-rotating twin screw extruder, its length-to-diameter ratio is 32～40.
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2006
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