CN1215121C - Super malleable poly butylene terephthalate (PBT) complex and its preparing method - Google Patents
Super malleable poly butylene terephthalate (PBT) complex and its preparing method Download PDFInfo
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- CN1215121C CN1215121C CN 03114187 CN03114187A CN1215121C CN 1215121 C CN1215121 C CN 1215121C CN 03114187 CN03114187 CN 03114187 CN 03114187 A CN03114187 A CN 03114187A CN 1215121 C CN1215121 C CN 1215121C
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Abstract
The present invention discloses a polybutylene terephthalate (PBT) composition with super toughness, and a preparation method thereof. The composition comprises 20 to 90 parts of polybutylene terephthalate (PBT) and 10 to 70 parts of composite toughening agents by weight. The polybutylene terephthalate (PBT) composition adopts the cooperative toughening action of a A+B type composite toughening agent to achieve the effect of super toughness, solves the problems of poor toughening effect, greatly reduction of strength and rigidness after toughening, and the like existing in the conventional toughening agent, and realizes the actual effects of high notch impact strength, no reduction of tensile strength, bending strength and bending modulus, and low cost. The polybutylene terephthalate (PBT) composition with super toughness can be widely used for preparing components and parts of electronic apparatuses, machines, , household electrical appliances, etc.
Description
Technical field
The present invention relates to polymeric material field, particularly a kind of super tough polybutylene terephthalate (PBT) mixture and preparation method thereof.
Background technology
Polybutylene terephthalate (PBT) is a kind of crystalline polymer of high comprehensive performance, but because the crystalline influence causes material big to notch sensitivity, notched Izod impact strength is lower, generally is lower than 8KJ/m
2Polybutylene terephthalate (PBT) self poor fire in addition can lingering, has further limited its application aspect the engineering plastics product.
Improve the notched Izod impact strength of polybutylene terephthalate (PBT), research in this respect at present is more, but very limited to the notched Izod impact strength raising of PBT, but all less than 25KJ/m
2But the occasion of much having relatively high expectations in actual applications, but needs notched Izod impact strength greater than 50KJ/m
2Usually adopt some thermoplastic elastomers to come toughness reinforcing polybutylene terephthalate (PBT) at present, the Izod notched Izod impact strength generally is difficult to reach 25KJ/m
2More than, but can cause tensile strength, flexural strength and the modulus in flexure of material to descend significantly simultaneously, the consistency of these toughner and polybutylene terephthalate (PBT) is not fine in addition, will make the layers of material peeling when addition in case surpass 10%.
Secondly polybutylene terephthalate (PBT), is absolutely necessary with being used of other auxiliary agents such as fire retardant in some practical application as engineering plastics.Low molecule fire retardants such as many at present employing Poly Brominated Diphenyl Ethers, and Poly Brominated Diphenyl Ethers can be moved to product surface in the process of using, make product surface " frosting " phenomenon occur, other research shows that also Poly Brominated Diphenyl Ethers can produce the chemical substance that carcinogenesis is arranged in the incendiary process, begun the use of this based flame retardant of Poly Brominated Diphenyl Ethers is formed certain restriction at present abroad.
Summary of the invention
The object of the present invention is to provide a kind of shortcoming that overcomes prior art, high notched Izod impact strength and the tensile strength that do not reduce, flexural strength and modulus in flexure, super tough polybutylene terephthalate (PBT) mixture that cost is low.
Another object of the present invention is to provide the preparation method of above-mentioned mixture.
Super tough polybutylene terephthalate of the present invention (PBT) mixture, this mixture comprises: polybutylene terephthalate (PBT) 20-90 weight part, composite toughing agent 10-70 weight part.Wherein polybutylene terephthalate (PBT) especially is the 20-80 weight part, can also contain composite flame-retardant agent 5-30 part.
Super tough polybutylene terephthalate of the present invention (PBT) mixture, wherein said composite toughing agent is the A+B type.Composite toughing agent is made up of 5-95 weight part toughner A and 95-5 weight part toughner B.A is a kind of ester bond superpolymer or multiple mixture that contains the ester bond superpolymer of containing; The mixture of one or more in the superpolymer that B is superpolymer, the superpolymer with butadiene with styrene group, have the hydrogenant butadiene.The preparation method of composite toughing agent is: earlier toughner A is added thorough mixing in the kneader, be warming up to 200-240 ℃ simultaneously, mediate and then added toughner B in 10-15 minute, further mediated 5-10 minute, the discharging postcooling is pulverized to room temperature and is obtained composite toughing agent.
Adopt the advantage of A+B type composite toughing agent to be that very big synergy is arranged between them, thereby can reach the effect of " super tough ".A+B type composite toughing agent has remedied intensity and the inflexible decline that conventional toughner causes to a great extent when toughness reinforcing simultaneously.Adopt A+B type composite toughing agent to make polybutylene terephthalate (PBT) reach the superelevation Izod notched Izod impact strength of 66KJ/m2 not reducing under polybutylene terephthalate (PBT) the inflexible prerequisite.
Super tough polybutylene terephthalate of the present invention (PBT) mixture, when needs during than high flame resistance, wherein contained composite flame-retardant agent is a brominated flame-retardant and antimonous oxide is composite forms, wherein the weight ratio of bromine and antimony is 2.4～2.6: 1.Both have good synergistic, and the flame retarding efficiency height is good with composite toughing agent consistency of the present invention.Brominated flame-retardant in the fire retardant is one or more a mixture of brominated polyphenylene butylene, poly-bromination benzene butylene, brominated epoxy resin, poly-bromination carbonic ether, brominated polycarbonate, polyacrylic acid pentabromo-benzyl ester.
Also can add multiple auxiliary agents such as photostabilizer, thermo-stabilizer, pigment, releasing agent, lubricant and matting agent in super tough polybutylene terephthalate of the present invention (PBT) mixture.
The preparation method of super tough polybutylene terephthalate of the present invention (PBT) mixture is: earlier polybutylene terephthalate (PBT), composite toughing agent are mixed through high-speed stirring, send into twin screw extruder by the feeder of delicate metering again, subsequently composite flame-retardant agent is added forcing machine from the delicate metering feeder, fully plasticizing, fusion, compound, again through extrude, tie rod, cooling, pelletizing, oven dry and packing.
The length-to-diameter ratio that is applied to the twin screw extruder among the mixture preparation method of the present invention is at least 32, more preferably greater than 36; Have at least two covers to have the feeding device of precision measuring instrument; Have precise dose control and vacuum-pumping equipment.
Each section extruder temperature among the mixture preparation method of the present invention should be controlled between 225-315 ℃, preferably is controlled between 240-290 ℃.
The super tough polybutylene terephthalate of the present invention (PBT) mixture, adopt the coordination plasticizing effect of A+B type composite toughing agent and reached the effect of " super tough ", solve poor, simultaneously toughness reinforcing back intensity of conventional toughner toughening effect and rigidity and descended the degradation problem significantly, realize high notched Izod impact strength and do not reduced tensile strength, flexural strength and modulus in flexure, the actual effect that cost is low.Super tough polybutylene terephthalate of the present invention (PBT) mixture can be widely used in the component of making electronic apparatus, machine machinery, household electrical appliances etc.
Embodiment
Following examples will help those of ordinary skill in the art further to understand the present invention, but not limit the present invention in any form
Specific embodiments is provided by embodiment.
The Example formulations of super tough polybutylene terephthalate of the present invention (PBT) mixture sees Table 2.Wherein the composite toughening agent prescription sees Table 1.The embodiment prescription that contains other super tough polybutylene terephthalate (PBT) mixture of higher flame retardant grade sees Table 3.The performance test results of each embodiment mixture sees Table 4,5
Table 1
| Title | The polydimethyl vinylformic acid two ethanol ester that contracts | Styrene-ethylene/butadiene-styrene |
| Parts by weight | 60 | 40 |
Table 2
| Title | Polybutylene terephthalate (PBT) | Composite toughing agent |
| Parts by weight | 70 | 30 |
Table 3
| Title | Polybutylene terephthalate (PBT) | Composite toughing agent | Composite flame-retardant agent | |
| Polyacrylic acid pentabromo-benzyl ester | Antimonous oxide | |||
| Parts by weight | 60 | 20 | 15 | 5 |
Table 4
| Project | Testing method | Unit | Index |
| Tensile strength | GB1040 | MPa | 55 |
| Flexural strength | GB9341 | MPa | 85 |
| Modulus in flexure | GB9341 | MPa | 2300 |
| Notched Izod impact strength | GB1843 | KJ/m 2 | 66 |
| Flame retardant properties | UL94 | 0.8mm | HB |
Table 5
| Project | Testing method | Unit | Index |
| Tensile strength | GB1040 | MPa | 50 |
| Flexural strength | GB9341 | MPa | 85 |
| Modulus in flexure | GB9341 | MPa | 2350 |
| Notched Izod impact strength | GB1843 | KJ/m 2 | 60 |
| Flame retardant properties | UL94 | 0.8mm | V-0 |
Claims (6)
1. a super tough polybutylene terephthalate (PBT) mixture, this mixture comprises: polybutylene terephthalate (PBT) 20-90 weight part, composite toughing agent 10-70 weight part; Described composite toughing agent is made up of 5-95 weight part toughner A and 95-5 weight part toughner B, the preparation method of described composite toughing agent is: earlier toughner A is added thorough mixing in the kneader, be warming up to 200-240 ℃ simultaneously, mediate and then added toughner B in 10-15 minute, further mediated 5-10 minute, the discharging postcooling is pulverized to room temperature and is obtained composite toughing agent; Wherein said toughner A is a kind of ester bond superpolymer or multiple mixture that contains the ester bond superpolymer of containing, the mixture of one or more in the superpolymer that described toughner B is superpolymer, the superpolymer with butadiene with styrene group, have the hydrogenant butadiene.
2. super tough polybutylene terephthalate as claimed in claim 1 (PBT) mixture is characterized in that polybutylene terephthalate (PBT) 20-80 weight part.
3. super tough polybutylene terephthalate as claimed in claim 2 (PBT) mixture is characterized in that also containing composite flame-retardant agent 5-30 weight part.
4. super tough polybutylene terephthalate according to claim 3 (PBT) mixture is characterized in that composite flame-retardant agent is a brominated flame-retardant and antimonous oxide is composite forms.
5. super tough polybutylene terephthalate according to claim 4 (PBT) mixture is characterized in that brominated flame-retardant in the composite flame-retardant agent is one or more a mixture of brominated polyphenylene butylene, poly-bromination benzene butylene, brominated epoxy resin, poly-bromination carbonic ether, brominated polycarbonate, polyacrylic acid pentabromo-benzyl ester.
6. the preparation method of the described super tough polybutylene terephthalate of claim 3 (PBT) mixture is: earlier polybutylene terephthalate (PBT), composite toughing agent are mixed through high-speed stirring, send into twin screw extruder by the feeder of delicate metering again, subsequently composite flame-retardant agent is added forcing machine from the delicate metering feeder, fully plasticizing, fusion, compound, again through extrude, tie rod, cooling, pelletizing, oven dry and packing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03114187 CN1215121C (en) | 2003-04-10 | 2003-04-10 | Super malleable poly butylene terephthalate (PBT) complex and its preparing method |
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| CN 03114187 CN1215121C (en) | 2003-04-10 | 2003-04-10 | Super malleable poly butylene terephthalate (PBT) complex and its preparing method |
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| CN1215121C true CN1215121C (en) | 2005-08-17 |
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| CN 03114187 Expired - Lifetime CN1215121C (en) | 2003-04-10 | 2003-04-10 | Super malleable poly butylene terephthalate (PBT) complex and its preparing method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100617706B1 (en) * | 2004-10-21 | 2006-08-28 | 주식회사 삼양사 | Polybutylene Terephthalate Resin Composition and Multi-layer Insulating Electric Wire Comprising the Same |
| CN101412841B (en) * | 2008-12-02 | 2011-09-14 | 上海金发科技发展有限公司 | Heat resisting super ductibility polybutylene terephthalate complex and preparation thereof |
| CN103044864A (en) * | 2012-12-10 | 2013-04-17 | 常州大学 | Flame-retardant PET (Polythylene Terephthalate) material and preparation method thereof |
| CN105176014A (en) * | 2015-09-22 | 2015-12-23 | 苏州博利迈新材料科技有限公司 | PBT toughening plastic and preparation method thereof |
| CN107915965B (en) * | 2017-12-06 | 2019-10-18 | 厦门源亚泰塑胶科技有限公司 | A kind of high tenacity flame retardant PBT composition |
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Denomination of invention: Super malleable poly butylene terephthalate (PBT) complex and its preparing method Effective date of registration: 20100414 Granted publication date: 20050817 Pledgee: Industrial Commercial Bank of China Ltd. Guangzhou third sub branch Pledgor: KINGFA SCI. & TECH. Co.,Ltd.|SHANGHAI KINGFA SCI.,&TECH. Co.,Ltd. Registration number: 2010990000735 |
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