CN102516672B - Beta crystal form ethylene propylene polypropylene random copolymer composite and preparation method thereof - Google Patents
Beta crystal form ethylene propylene polypropylene random copolymer composite and preparation method thereof Download PDFInfo
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- CN102516672B CN102516672B CN201110358836.5A CN201110358836A CN102516672B CN 102516672 B CN102516672 B CN 102516672B CN 201110358836 A CN201110358836 A CN 201110358836A CN 102516672 B CN102516672 B CN 102516672B
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Abstract
The invention relates to a beta crystal form ethylene propylene polypropylene random copolymer composite, which comprises the following components in percentage by weight: 97-99 percent of polypropylene, 0.1-1 percent of heat stabilizer, 0.1-1 percent of lubricating agent, and 0.1-1 percent of beta crystal form nucleating agent, wherein the polypropylene is polypropylene random copolymer with the molar content of ethylene being less than or equal to 10 percent, and the beta crystal form nucleating agent is one or the mixture of aryl amide nucleating agent, aromatic amine nucleating agent and rare-earth metal complex nucleating agent. The polypropylene composite has favorable elasticity and chemical resistance, is very suitable for manufacturing seal rings of automobile storage batteries, and can be used under the acidity working condition of the automobile storage batteries at the temperature below 80 DEG C for a long time. The polypropylene composite can be prepared through extrusion by a conventional screw rod, and a preparation method is simple.
Description
Technical field
the invention belongs to technical field of polymer materials, be specifically related to a kind of beta crystal form ethylene propylene polypropylene random copolymer composite and preparation method thereof, this polypropylene composite is suitable for making the automobile component that automobile storage battery sealing-ring etc. is had relatively high expectations to elastic properties of materials, erosion resistance very much.
Background technology
what at present, the material of making automobile storage battery sealing-ring was generally used is sulfuration cis-1,4-polybutadiene rubber.The critical defect of sulfuration cis-1,4-polybutadiene rubber is that chemically-resistant electrolyte property is poor, and this has directly caused the use properties of automobile storage battery sealing-ring not good, and work-ing life is short.In addition, during due to battery-operated, the top temperature of electrolyte inside can reach 80 ℃, and vulcanizes cis-1,4-polybutadiene rubber at high temperature elasticity, toughness meeting variation, and therefore vulcanizing cis-1,4-polybutadiene rubber is difficult to bear this high temperature.
Summary of the invention
technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and a kind of have favorable elasticity and the corrosive beta crystal form ethylene propylene polypropylene random copolymer composite of excellent chemical are provided.
the present invention also will provide a kind of preparation method of above-mentioned beta crystal form ethylene propylene polypropylene random copolymer composite.
the 3rd object of the present invention is above-mentioned beta crystal form ethylene propylene polypropylene random copolymer composite to be applied to make the sealing-ring of automobile storage battery.
for solving above technical problem, the present invention takes following technical scheme:
, by weight percentage, the composition of raw materials of described polypropylene composite comprises:
polypropylene 97-99%
thermo-stabilizer 0.1-1%
lubricant 0.1-1%
beta crystal-type nucleater 0.1-1%
described polypropylene is the atactic copolymerized polypropene of ethene molar content≤10%, and described beta crystal-type nucleater is one or more the mixture in aryl amide nucleator, aromatic amine nucleator and rare earth metal complex class nucleator.
preferably, described beta crystal-type nucleater is aryl amide nucleator.
preferably, described polyacrylic melt flow rate (MFR) is 0.01～100 g/10min.
preferably, described thermo-stabilizer is one or more the combination in phenols thermo-stabilizer, amine thermo-stabilizer, phosphorous acid ester type thermal stabilizing agent and calixarene kind thermo-stabilizer.
preferably, described lubricant is one or more the combination in metal soap lubricant, stearic acid complex ester series lubricant agent and amides lubricant.
above-mentioned beta crystal form ethylene propylene polypropylene random copolymer composite can be undertaken making after melt blending, extruding pelletization by raw material being sent in the screw extrusion press that length-to-diameter ratio is 35 ~ 56:1, and preferred processing temperature is 170 ℃ ~ 240 ℃.
beta crystal form ethylene propylene polypropylene random copolymer composite of the present invention is very applicable to making the sealing-ring of automobile storage battery.
due to the enforcement of above technical scheme, the present invention compared with prior art tool has the following advantages:
it is matrix that the composition of raw materials of polypropylene composite of the present invention be take the Co-polypropylene of ethene molar content≤10%, adds beta crystal-type nucleater, and the beta crystal form ethylene propylene polypropylene random copolymer composite making has good elasticity and chemical resistance.Tensile strength >=the 25MPa of polypropylene composite of the present invention, modulus in flexure >=1000MPa, normal temperature (23 ℃) notched Izod impact strength >=40KJ/m2, tension set >=400%, life-time service under the acid Working environment of automobile storage battery that can be at 80 ℃, elasticity under hot environment can reach the T080 grade in the standard DISO of Dongfeng Automobile 37, soaks after 7 days in 20% sulphuric acid soln, and stretching strength retentivity is more than 95%.
polypropylene composite of the present invention can obtain by conventional Screw Extrusion preparation, and preparation method is simple.
Embodiment
below in conjunction with specific embodiment, the present invention will be further described in detail, but be not limited to these embodiment.
embodiment 1
by 98 kilograms of atactic copolymerized polypropenes, 0.5 kilogram of phenols thermo-stabilizer Irganox 1010(CIBA company), melting mixing is disperseed in 0.5 kilogram of Lubricate EBS (a kind of amides lubricant), the 1 kilogram of terephthalic acid Cyclohexamide beta crystal-type nucleater twin screw extruder that is 40:1 in length-to-diameter ratio, extruding pelletization, obtains the polypropylene composite of the present embodiment.Processing temperature is 200 ℃.
the performance of the present embodiment gained polypropylene composite is as follows:
* sample is placed on to mass concentration and is in 20% sulfuric acid and soak 7 days.
embodiment 2
by 98.5 kilograms of atactic copolymerized polypropenes, 0.5 kilogram of phenols thermo-stabilizer Irganox 1010(CIBA company), 0.5 kilogram of Lubricate EBS (a kind of amides lubricant), 0.5 kilogram of TMB-5(benzamide beta crystal-type nucleater) melting mixing is disperseed in the twin screw extruder that is 40:1 in length-to-diameter ratio, extruding pelletization, obtains the polypropylene composite of the present embodiment.Processing temperature is 200 ℃.
the performance of the present embodiment gained polypropylene composite is as follows:
* sample is placed on to mass concentration and is in 20% sulfuric acid and soak 7 days.
embodiment 3
by 98.7 kilograms of atactic copolymerized polypropenes, 0.5 kilogram of phenols thermo-stabilizer Irganox 1010(CIBA company), 0.5 kilogram of lubricant stearic acid zinc, 0.3 kilogram of TMB-5(benzamide beta crystal-type nucleater) melting mixing is disperseed in the twin screw extruder that is 40:1 in length-to-diameter ratio, extruding pelletization, obtains the polypropylene composite of the present embodiment.Processing temperature is 200 ℃.
the performance of the present embodiment gained polypropylene composite is as follows:
* sample is placed on to mass concentration and is in 20% sulfuric acid and soak 7 days.
above the present invention is described in detail; its object is to allow the personage who is familiar with this art can understand content of the present invention and be implemented; can not limit the scope of the invention with this; the equivalence that all spirit according to the present invention are done changes or modifies, and all should be encompassed in protection scope of the present invention.
Claims (8)
1. beta crystal form ethylene propylene polypropylene random copolymer composite is used for the purposes of making automobile storage battery sealing-ring, it is characterized in that: by weight percentage, the composition of raw materials of described polypropylene composite comprises:
Polypropylene 97-99%
Thermo-stabilizer 0.1-1%
Lubricant 0.1-1%
Beta crystal-type nucleater 0.1-1%
Described polypropylene is the atactic copolymerized polypropene of ethene molar content≤10%, and described beta crystal-type nucleater is one or more the mixture in aryl amide nucleator, aromatic amine nucleator and rare earth metal complex class nucleator.
2. purposes according to claim 1, is characterized in that: described beta crystal-type nucleater is aryl amide nucleator.
3. purposes according to claim 1 and 2, is characterized in that: by weight percentage, the composition of raw materials of described polypropylene composite comprises:
Polypropylene 98 ~ 99%
Thermo-stabilizer 0.1 ~ 1%
Lubricant 0.1 ~ 1%
Beta crystal-type nucleater 0.3 ~ 1%.
4. purposes according to claim 1 and 2, is characterized in that: described polyacrylic melt flow rate (MFR) is 0.01～100 g/10min.
5. purposes according to claim 1 and 2, is characterized in that: described thermo-stabilizer is one or more the combination in phenols thermo-stabilizer, amine thermo-stabilizer, phosphorous acid ester type thermal stabilizing agent and calixarene kind thermo-stabilizer.
6. purposes according to claim 1 and 2, is characterized in that: described lubricant is one or more the combination in metal soap lubricant, stearic acid complex ester series lubricant agent and amides lubricant.
7. purposes according to claim 1 and 2, is characterized in that: described beta crystal form ethylene propylene polypropylene random copolymer composite is to be undertaken making after melt blending, extruding pelletization by raw material being sent in the screw extrusion press that length-to-diameter ratio is 35 ~ 56:1.
8. purposes according to claim 7, is characterized in that: the processing temperature of preparing described polypropylene composite is 170 ℃ ~ 240 ℃.
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| CN201110358836.5A CN102516672B (en) | 2011-11-14 | 2011-11-14 | Beta crystal form ethylene propylene polypropylene random copolymer composite and preparation method thereof |
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| CN102516672B true CN102516672B (en) | 2014-02-05 |
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| CN101338056A (en) * | 2007-07-03 | 2009-01-07 | 中国石化上海石油化工股份有限公司 | Acrylic resin for manufacturing syringes for medical use |
| CN101993565A (en) * | 2009-08-19 | 2011-03-30 | 中国石化上海石油化工股份有限公司 | High tenacity and high impact polypropylene resin composition |
| CN101891923B (en) * | 2010-07-30 | 2012-04-18 | 四川大学 | Method for preparing low-temperature flexible random copolymerization polypropylene product |
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