| US 7,402,638 B2 | ||
| Propylene polymer particle method of producing the same and use thereof | ||
| Shuji Matsumura, Takaishi (Japan); Keita Itakura, Sodegaura (Japan); Satoshi Hashizume, Takaishi (Japan); Akihiro Inukai, Sodegaura (Japan); Kouichirou Yamamoto, Sodegaura (Japan); Ayako Kadosaka, Sodegaura (Japan); Yoshio Sasaki, Takaishi (Japan); Masashi Higuchi, Takaishi (Japan); and Hiroshi Nishikawa, Sodegaura (Japan) | ||
| Assigned to Mitsui Chemicals, Inc., Tokyo (Japan) | ||
| Appl. No. 10/568,964 PCT Filed Aug. 20, 2004, PCT No. PCT/JP2004/012331 § 371(c)(1), (2), (4) Date Feb. 21, 2006, PCT Pub. No. WO2005/019283, PCT Pub. Date Mar. 03, 2005. |
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| Claims priority of application No. 2003-298335 (JP), filed on Aug. 22, 2003; application No. 2004-152218 (JP), filed on May 21, 2004; application No. 2004-181518 (JP), filed on Jun. 18, 2004; and application No. 2004-211935 (JP), filed on Jul. 20, 2004. | ||
| Prior Publication US 2006/0222849 A1, Oct. 05, 2006 | ||
| Int. Cl. C08F 210/06 (2006.01); C08F 4/6592 (2006.01); B32B 27/08 (2006.01) | ||
| U.S. Cl. 526—129 [526/142; 526/160; 526/165; 526/943; 502/103; 502/120; 502/126; 502/152; 428/407] | 16 Claims |
| 1. A propylene random copolymer particle having a trilayer structure consisting of a first skin layer [L1] that is present at the outermost crust, a second skin layer [L2] that is internally contacting with the first skin layer, and a core [L3] that is present inner to the second skin layer,
wherein, in the transmission electron microscope (TEM) photograph (magnification×4000) of an ultrathin section of the core
[L3] after metal oxide staining, no stained component which has a particle diameter of 3 μm or greater is observed, and
wherein the propylene random copolymer satisfies the following requirements [1] to [4]:
[1] the concentration (Pa, % by mole) of a constituent of the copolymer derived from propylene (a), and the concentration
(Px, % by mole) of a constituent of the copolymer derived from at least one olefin selected from ethylene (b) and α-olefins
having 4 to 20 carbon atoms (c), each of which is contained in the propylene random copolymer, satisfy the following relational
expressions (Eq-1) to (Eq-3):
85≤Pa<100 (Eq-1)
0<Px≤15 (Eq-2)
Pa+Px=100 (Eq-3);
[2] the concentration (Pa, % by mole) of the constituent of the copolymer derived from propylene (a) contained in the propylene
random copolymer, and the melting point (Tm) measured with a differential scanning calorimeter satisfy the following relational
expression (Eq-4):
135−4×(100−Pa)<Tm<165−4×(100−Pa) (Eq-4);
[3] the total amount of 2,1-bonded and 1,3-bonded non-stereoregular fractions is less than or equal to 0.2% by mole; and
[4] the amount of the n-decane (nC10)-soluble fraction is less than or equal to 2.0% by weight.
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