Propylene-based random copolymers and propylene-based resin compositions, films thereof and propylene-based resin laminates
AssigneeIdemitsu Petrochemical Co., Ltd.
InventorsYasushi Seta, Yutaka Minami
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Abstract
The invention provides (1) a propylene-ethylene-1-butene random copolymer having specific properties, (2) a resin composition comprising a propylene-ethylene-1-butene random copolymer with specific properties, and a nucleating agent, (3) a resin composition comprising a propylene-ethylene-1-butene random copolymer with specific properties, and a propylene-based polymer; and their films, and multi-layered, propylene-based laminates of which the outermost layer is made of a specific propylene-based polymer. The films and the laminates exhibit excellent heat-sealability, and have good slip characteristics and good anti-blocking characteristics.
Claims38
A propylene-ethylene-1-butene random copolymer satisfying the following:
- the sum of α and β,(α+β), wherein α means ethylene unit content and β means 1-butene unit content as measured through 13C-NMR, falls between 0.1 and 15% by mole;
- the amount of its fraction, Wp, eluted within the temperature range between (Tp−5)° C. and (Tp+5)° C. in temperature-programmed fractionation chromatography is at least 20% by weight, with Tp (° C.) being the peak temperature for essential elution;
- the amount of its fraction, W0, % by weight, eluted within the temperature range not higher than 0° C. in temperature-programmed fractionation chromatography, and (α+β) satisfy the relationship therebetween given by the following formula (I-1) to (I-3):
- in the case of 0.1≦(α+β)<2, W0≦1 (I-1);
- in the case of 2≦(α+β)<12, W0≦(α+β)/2 (I-2);
- in the case of 12≦(α+β)≦15, W0≦6 (I-3).
A propylene random copolymer composition comprising (i) a propylene-ethylene-1-butene random copolymer and (ii) a nucleating agent, of which the peak top temperature, Tc (° C.), on the highest temperature side in its crystallization curve plotted in differential scanning calorimetry (DSC), and the peak top temperature, Tm (° C.), on the lowermost temperature side in its melting curve plotted in DSC satisfy the following formula (II-1):
- Tc≧0.75×Tm−5 (II-1),
- and the amount of the fraction, W0, % by weight, eluted within the temperature range not higher than 0° C. in temperature-programmed fractionation chromatography is at most 6% by weight.
A propylene random copolymer composition comprising (i) a propylene-ethylene-1-butene random copolymer and (ii) a nucleating agent, wherein the copolymer (i) satisfies the following conditions:
- the sum of α and β, (α+β), wherein α means ethylene unit content and β means 1-butene unit content as measured through 13C-NMR, falls between 0.1 and 15% by mole;
- the amount of its fraction, Wpt, eluted within the temperature range between (Tpt−5)° C. and (Tpt+5)° C. in temperature-programmed fractionation chromatography is at least 20% by weight, with Tpt (° C.) being the peak temperature for essential elution;
- the amount of its fraction, W0t, % by weight, eluted within the temperature range not higher than 0° C. in temperature-programmed fractionation chromatography, and (α+β) satisfy the relationship therebetween given by the following formula (I-1) to (I-3):
- in the case of 0.1≦(α+β)<2, W0t≦1 (II-2);
- in the case of 2≦(α+β)<12, W0t(α+β)/2 (II-3);
- in the case of 12≦(α+β)≦15, W0t≦6 (II-4).
A propylene resin composition comprising (A) from 55 to 99 parts by weight of a propylene-ethylene-1-butene random copolymer and (B) from 1 to 45 parts by weight of a propylene polymer of which the crystallization temperature TCB (° C.), as measured through differential scanning calorimetry, is higher than the crystallization temperature TCA (° C.) of the component (A) measured through the same;
- the composition being such that its peak top temperature, Tc (° C.), on the highest temperature side in its crystallization curve plotted in differential scanning calorimetry, and the peak top temperature, Tm (° C.), on the lowermost temperature side in its melting curve plotted in the same satisfy the relationship therebetween given by the following formula (III-1):
- Tc≧0.75×Tm−5 (III-1),
- and that the amount of its fraction, W0, eluted within the temperature range not higher than 0° C. in temperature-programmed fractionation chromatography (TREF) is at most 6% by weight.
A multi-layered, propylene resin laminate, of which at least one outermost layer comprises the following propylene polymer A and B:
- propylene polymer A is a propylene-ethylene random copolymer satisfying the following:
- its ethylene unit content, γ, as measured through 13C-NMR, falls between 0.2 and 10% by weight;
- the amount of its fraction, Wp, eluted within the temperature range between (Tp−5)° C. and (Tp+5)° C. in temperature-programmed fractionation chromatography is at least 20% by weight, with Tp (° C.) being the peak temperature for essential elution;
- the amount of its fraction, W0, % by weight, eluted within the temperature range not higher than 0° C. in temperature-programmed fractionation chromatography, and γ satisfy the relationship therebetween given by the following formula (A1):
- W0≦(3+2γ)/4 (A1).
- propylene polymer B is a propylene-ethylene-1-butene random copolymer satisfying the following:
- the sum of α and β, (α+β) wherein α means ethylene unit content and β means 1-butene unit content as measured through 13C-NMR, falls between 0.1 and 15% by mole;
- the amount of its fraction, Wp, eluted within the temperature range between (Tp−5)° C. and (Tp+5)° C. in temperature-programmed fractionation chromatography is at least 20% by weight, with Tp (° C.) being the peak temperature for essential elution;
- the amount of its fraction, W0, % by weight, eluted within the temperature range not higher than 0° C. in temperature-programmed fractionation chromatography, and (α+β) satisfy the relationship therebetween given by the following formula (B1) to (B3):
- in the case of 0.1≦(α+β)<2, W0≦1 (B1);
- in the case of 2≦(α+β)<12, W0≦(α+β)/2 (B2);
- in the case of 12≦(α+β)≦15, W0≦6 (B3).
A multi-layered, propylene resin laminate, of which at least one outermost layer comprises the following propylene polymer B:
- a propylene-ethylene-1-butene random copolymer satisfying the following:
- the sum of α and β, (α+β), wherein α means ethylene unit content and β means 1-butene unit content as measured through 13C-NMR, falls between 0.1 and 15% by mole;
- the amount of its fraction, Wp, eluted within the temperature range between (Tp−5)° C. and (Tp+5)° C. in temperature-programmed fractionation chromatography is at least 20% by weight, with Tp (° C.) being the peak temperature for essential elution;
- the amount of its fraction, W0, % by weight, eluted within the temperature range not higher than 0° C. in temperature-programmed fractionation chromatography, and (α+β) satisfy the relationship therebetween given by the following formula (B1) to (B3):
- in the case of 0.1≦(α+β)<2, W0≦1 (B1);
- in the case of 2≦(α+β)<12, W0≦(α+β)/2 (B2);
- in the case of 12≦(α+β)≦15, W0≦6 (B3).
Dependencies are inferred from the claim text.