Abstract An ethylene copolymer having the following characteristics (A) to (I): (A) it has a melt flow rate of from 0.01 to 200 g/10 min.; (B) it has a density of from 0.900 to 0.945 g/cm<3>; (C) it has a composition distribution parameter (U), defined by the equation U = 100 x (Cw/Cn - 1) wherein Cw is the weight average degree of branching, and Cn is the number average degree of branching, of not more than 50; (D) the amount of components having a degree of branching of not more than 2/1000 carbons is 15% by weight based on the ethylene copolymer; (E) the amount of components having a degree of branching of at least 30/1000 carbons is not more than 15% by weight based on the ethylene copolymer; (F) the average chain length ratio of the methylene groups is not more than 2.0; (G) it has n melting points measured by a differential scanning calorimeter (DSC) (where n>/=2); the highest melting point (T1) among these DSC melting points is given by the equation T1 = (175 x d - 46) DEG C SIMILAR 125 DEG C(d is the density of the copolymer); the difference between T1 and the lowest melting point (Tn) among the DSC melting point is given by 0 DEG C < T1 - Tn </= 18 DEG C; and the difference between T1 and the second highest melting point T2 is given by 0 DEG C < T 1 - T2 </= 5 DEG C, provided that when there are two (n=2) DSC melting points, the difference is in accordance with the above expression 0 DEG C < T1 - Tn </= 18 DEG C; (H) the ratio of the amount of heat of crystal fusion (H1) at the highest melting point (T1) to the total amount of heat of crystal fusion (HT) is given by 0 < H1/HT </= 0.40, (I) it is a copolymer of ethylene with at least one C4-C20 alpha -olefin.
Inventors
👤 Masaki Kohyama
👤 Masanori Motooka
👤 Takashi Ueda
Bibliographic Details
Application Number—
JurisdictionEP
Data Sourcegoogle_patents
Last Synchronized2026-11-06 10:29
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16; C08F10/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
13 words
- An ethylene copolymer having in combination the following characteristics (A) to (I):
Claim 2
Dependent Claim
13 words
- An ethylene copolymer having in combination the following characteristics (A) to (I):
Claim 3
Dependent Claim
295 words
(A) it has a melt flow rate of from 0.01 to 200 g/10 min.; (B) it has a density of from 0.900 to 0.945 g/cm 3 ; (C) it has a composition distribution parameter (U), defined by the following equation (1) wherein Cw is the weight average degree of branching, and Cn is the number average degree of branching, of not more than 50; (D) the amount of components having a degree of branching of not more than 2/1000 carbons is not more than 15% by weight based on the ethylene copolymer; (E) the amount of components having a degree of branching of at least 30/1000 carbons is not more than 15% by weight based on the ethylene copolymer; (F) the average chain length ratio of the methylene groups is not more than 2.0; (G) it has n melting points measured by a differential scanning calorimeter (DSC) (where n≧2); the highest melting point (T 1 ) among these DSC melting points is given by the following equation wherein d is the density (g/cm 3 ) of the copolymer; the difference between T 1 and the lowest melting point (T ) among the DSC melting point is given by and the difference between T 1 and the second highest melting point T 2 is given by provided that when there are two (n=2) DSC melting points, the difference is in accordance with the above expression 0°C<T 1 - T n ≦ 18°C; (H) the ratio of the amount of heat of crystal fusion (H 1 ) at the highest melting point (T 1 ) to the total amount of heat of crystal fusion (H T ) is given by and (I) it is a copolymer of ethylene with at least one C 4 -C 20 a-olefin.
Claim 4
Dependent Claim
295 words
(A) it has a melt flow rate of from 0.01 to 200 g/10 min.; (B) it has a density of from 0.900 to 0.945 g/cm 3 ; (C) it has a composition distribution parameter (U), defined by the following equation (1) wherein Cw is the weight average degree of branching, and Cn is the number average degree of branching, of not more than 50; (D) the amount of components having a degree of branching of not more than 2/1000 carbons is not more than 15% by weight based on the ethylene copolymer; (E) the amount of components having a degree of branching of at least 30/1000 carbons is not more than 15% by weight based on the ethylene copolymer; (F) the average chain length ratio of the methylene groups is not more than 2.0; (G) it has n melting points measured by a differential scanning calorimeter (DSC) (where n≧2); the highest melting point (T 1 ) among these DSC melting points is given by the following equation wherein d is the density (g/cm 3 ) of the copolymer; the difference between T 1 and the lowest melting point (T ) among the DSC melting point is given by and the difference between T 1 and the second highest melting point T 2 is given by provided that when there are two (n=2) DSC melting points, the difference is in accordance with the above expression 0°C<T 1 - T n ≦ 18°C; (H) the ratio of the amount of heat of crystal fusion (H 1 ) at the highest melting point (T 1 ) to the total amount of heat of crystal fusion (H T ) is given by and (I) it is a copolymer of ethylene with at least one C 4 -C 20 a-olefin.
Claim 5
Dependent Claim
30 words
An ethylene copolymer according to claim 1 which further has the following characteristic (J), (J) the copolymer has an n-decane-soluble content at 23°C of not more than 5% by weight.
Claim 6
Dependent Claim
20 words
An ethylene copolymer according to claim 1 or 2 wherein the highest melting point (T 1 ) is defined by
Claim 9
Dependent Claim
14 words
Shaped articles of an ethylene copolymer as claimed in claim 1, 2 or 3.