Graft-modified ethylene/1-butene copolymer, polyamide resin composition, and shaped product
AssigneeMitsui Chemicals, Inc.
InventorsShuhei NOZAKI, Tetsuya NAKAMURA
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Abstract
One embodiment of the present invention provides a graft-modified ethylene/1-butene copolymer suitable as an impact modifier for an engineering plastic such as polyamide, and provides a polyamide resin composition excellent in balance between impact resistance of a shaped product and flowability of the polyamide resin composition, using the graft-modified ethylene/1-butene copolymer. One embodiment of the present invention is a graft-modified ethylene/1-butene copolymer (A), obtained by graft-modifying an ethylene/1-butene copolymer (a) satisfying requirements (a-i) and (a-ii) with a polar compound. The requirements (a-i) and (a-ii) are described in the present description.
Claims12
A graft-modified ethylene/1-butene copolymer (A), obtained by graft-modifying an ethylene/1-butene copolymer (a) with a polar compound,
- wherein the ethylene/1-butene copolymer (a) satisfies the following requirements (a-i) and (a-ii):
- requirement (a-i):
- a ratio (MFR10/MFR2.16) of a melt flow rate (MFR10) measured under conditions of 190° C. and a load of 10 kg in accordance with ASTM D1238 to a melt flow rate (MFR2.16) measured under conditions of 190° C. and a load of 2.16 kg in accordance with ASTM D1238 is in the range of 6.7 to 9.0;
- and
- requirement (a-ii):
- a vinyl group content is in the range of 5.0 to 20.0 groups and a total amount of unsaturated bonds is in the range of 40.0 to 200.0 bonds, per 100,000 carbon atoms as calculated by 1H-NMR.
A graft-modified ethylene/1-butene copolymer (A), obtained by graft-modifying an ethylene/1-butene copolymer (a) with a polar compound,
- wherein the graft-modified ethylene/1-butene copolymer (A) satisfies the following requirements (A-i) to (A-v):
- requirement (A-i):
- a ratio (MFR10/MFR2.16) of a melt flow rate (MFR10) measured under conditions of 190° C. and a load of 10 kg in accordance with ASTM D1238 to a melt flow rate (MFR2.16) measured under conditions of 190° C. and a load of 2.16 kg in accordance with ASTM D1238 is in the range of 11.5 to 18.0;
- requirement (A-ii):
- a vinyl group content is in the range of 5.0 to 20.0 groups, and a total amount of unsaturated bonds is in the range of 40.0 to 200.0 bonds, per 100,000 carbon atoms as calculated by 1H-NMR;
- requirement (A-iii):
- an amount of graft modification is in the range of 0.1 to 2.0% by mass based on 100% by mass of the graft-modified ethylene/1-butene copolymer (A);
- requirement (A-iv):
- a melt flow rate (MFR2.16) measured in accordance with ASTM D1238 under conditions of 190° C. and a load of 2.16 kg, is in the range of 0.01 to 5.00 g/10 min;
- and
- requirement (A-v):
- a density measured in accordance with ASTM D1505 under condition of 25° C., is in the range of 850 to 885 kg/m3.
A polyamide resin composition comprising 1 to 50 parts by mass of the graft-modified ethylene/1-butene copolymer (A) according to claim 1 and 50 to 99 parts by mass of a polyamide resin (B), based on 100 parts by mass of a total of the graft-modified ethylene/1-butene copolymer (A) and the polyamide resin (B).
Dependencies are inferred from the claim text.