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US 6,203,893 B1Granted
Propylene resin composition, molded articles thereof and propylene resin laminate
AssigneeShowa Denko K.K.
InventorsYasuhiro Nohara, Kazuyuki Watanabe
Life of this patent
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Abstract
A mixture comprising: a composition containing polypropylene possessing specific properties, 45˜70 parts by weight; a polyolefin resin possessing specific properties, 5˜20 parts by weight; an inorganic filler selected from precipitated calcium carbonate, hydrated silicic acid, and hydrated calcium silicate, 5˜30 parts by weight; and an inorganic filler selected from talc, mica, and potassium titanate, 5˜30 parts by weight; is superior in scratch resistance, moldability, and balance of rigidity and impact resistance. In addition, a laminate having a layer of this mixture has superior gloss. This mixture and the laminate are useful in automobile parts, electric and electronic parts, packaging materials, etc.
Claims15
A propylene resin composition comprising:
- a rubber polymer, 3˜15 parts by weight;
- a composition containing polypropylene, 45˜70 parts by weight, said composition containing polypropylene possessing:
- a portion insoluble in xylene at 25° C. by solvent extraction method of not less than 98% by weight;
- an isotactic pentad fraction of not less than 96.5% as determined by 13C-NMR;
- an isotactic average chain length of not less than 90 as determined by 13C-NMR;
- and
- a total amount of fractions each of which has an isotactic average chain length of not less than 300 as determined by 13C-NMR, according to a column fractionation method, of not less than 10% by weight;
- a polyolefin resin selected from the group consisting of polyethylene resin and polypropylene resin, 5˜20 parts by weight, possessing:
- a ratio of η1/η2 of 4˜20, wherein η1 is a complex dynamic viscosity at an angular frequency of 10−1 rad/sec at 190° C., and η2 is a complex viscosity at an angular frequency of 10 rad/sec at 190° C.;
- Tcp of 110˜130° C., and Tmp/(Tmp-Tcp) of 3.0˜9.8, wherein Tcp is crystallization peak temperature, and Tmp is melting peak temperature of said polyolefin resin, said Tcp and said Tmp measurements obtained by a differential scanning calorimetry method wherein, for polyethylene, Tcp is measured after raising a temperature of said polyethylene resin to 190° C. and maintaining the temperature for five minutes, then lowering said temperature at a rate of 10° C./minute until said temperature reaches 30° C. and Tmp is then measured by raising said temperature at a rate of 10° C./minute to 190° C., and for polypropylene, Tcp is measured after raising a temperature of said polypropylene resin 230° C. and maintaining the temperature for five minutes, then lowering said temperature at a rate of 20° C. minute until said temperature reaches 30° C., and Tmp is then measured by raising said temperature at rate of 20° C./minute to 230° C.;
- and
- a crystal structure of an a-axis orientation in a diffraction pattern according to an X-ray diffraction method;
- at least one inorganic filler selected from the group consisting of precipitated calcium carbonate, hydrated silicic acid, and hydrated calcium silicate, 5˜30 parts by weight;
- and at least one inorganic filler selected from the group consisting of talc, mica, and potassium titanate, 5˜30 parts by weight.
11 more elements
A molded article of manufacture produced with material comprising:
- a composition containing polypropylene, 45˜70 parts by weight, said composition containing polypropylene possessing:
- a portion insoluble in xylene at 25° C. by solvent extraction method of not less than 98.0% by weight;
- an isotactic pentad fraction of not less than 96.5% as determined by 13C-NMR;
- an isotactic average chain length of not less than 90 as determined by 13C-NMR;
- and
- a total amount of fractions each of which has an isotactic average chain length of not less than 300 as determined by 13C-NMR, according to a column fractionation method, of not less than 10% by weight;
- a polyolefin resin selected from the group consisting of polyethylene resin and polypropylene resin, 5˜20 parts by weight, possessing:
- a ratio of η1/η2 of 4-20, wherein η1 is a complex dynamic viscosity at an angular frequency of 10−1 rad/sec at 190° C., and η2 is a complex viscosity at an angular frequency of 10 rad/sec at 190° C.;
- Tcp of 110˜130° C., and Tmp/(Tmp-Tcp) of 3.0˜9.8, wherein Tcp is crystallization peak temperature, and Tmp is melting peak temperature of said polyolefin resin, said Tcp and said Tmp measurements obtained by a differential scanning calorimetry method wherein, for polyethylene, Tcp is measured after raising a temperature of said polyethylene resin to 190° C. and maintaining the temperature for five minutes, then lowering said temperature at a rate of 10° C./minute until said temperature reaches 30° C. and Tmp is then measured by raising said temperature at a rate of 10° C./minute to 190° C., and for polypropylene, Tcp is measured after raising a temperature of said polypropylene resin 230° C. and maintaining the temperature for five minutes, then lowering said temperature at a rate of 20° C. minute until said temperature reaches 30° C., and Tmp is then measured by raising said temperature at rate of 20° C./minute to 230° C.;
- and
- a crystal structure of an a-axis orientation in a diffraction pattern according to an X-ray diffraction method;
- at least one inorganic filler selected from the group consisting of precipitated calcium carbonate, hydrated silicic acid, and hydrated calcium silicate, 5˜30 parts by weight;
- and at least one inorganic filler selected from the group consisting of talc, mica, and potassium titanate, 5˜30 parts by weight.
10 more elements
A propylene resin laminate comprising:
- a polypropylene layer which incorporates 0.005˜0.5% by weight of a dibenzylidenesorbitol derivative in a polypropylene, and
- a propylene resin layer containing a propylene resin composition comprising:
- a composition containing polypropylene, 45˜70 parts by weight, said composition containing polypropylene possessing;
- a portion insoluble in xylene at 25° C. by solvent extraction method of not less than 98.0% by weight;
- an isotactic pentad fraction of not less than 96.5% as determined by 13C-NMR;
- an isotactic average chain length of not less than 90 as determined by 13C-NMR;
- and
- a total amount of fractions each of which has an isotactic average chain length of not less than 300 as determined by 13C-NMR, according to a column fractionation method, of not less than 10% by weight;
- a polyolefin resin selected from the group consisting of polyethylene resin and polypropylene resin, 5˜20 parts by weight, possessing:
- a ratio of η1/η2 of 4˜20, wherein η1 is a complex dynamic viscosity at an angular frequency of 10−1 rad/sec at 190° C., and η2 is a complex viscosity at an angular frequency of 10 rad/sec at 190° C.;
- Tcp of 110˜130° C., and Tmp/(Tmp-Tcp) of 3.0˜9.8, wherein Tcp is crystallization peak temperature, and Tmp is melting peak temperature of said polyolefin resin, said Tcp and said Tmp measurements obtained by a differential scanning calorimetry method wherein, for polyethylene, Tcp is measured after raising a temperature of said polyethylene resin to 190° C. and maintaining the temperature for five minutes, then lowering said temperature at a rate of 10° C./minute until said temperature reaches 30° C. and Tmp is then measured by raising said temperature at a rate of 10° C./minute to 190° C., and for polypropylene, Tcp is measured after raising a temperature of said polypropylene resin 230° C. and maintaining the temperature for five minutes, then lowering said temperature at a rate of 20° C. minute until said temperature reaches 30° C., and Tmp is then measured by raising said temperature at rate of 20° C./minute to 230° C.;
- and
- a crystal structure of an a-axis orientation in a diffraction pattern according to an X-ray diffraction method;
- at least one inorganic filler selected from the group consisting of precipitated calcium carbonate, hydrated silicic acid, and hydrated calcium silicate, 5˜30 parts by weight;
- and at least one inorganic filler selected from the group consisting of talc, mica, and potassium titanate, 5˜30 parts by weight.
12 more elements
Dependencies are inferred from the claim text.