PATENT CLAIM ANALYSIS

Application Number: 16213349
Application Type: Utility
Filing Date: 2018-12
Publication Date: 2019-04
Patent Classification: ["525", "247000"]

Abstract:
A method for producing a propylene-based block copolymer produces a propylene-based copolymer that exhibits excellent stereoregularity, rigidity, and impact resistance in a convenient and efficient manner while achieving high polymerization activity. The method for producing a propylene-based block copolymer includes bringing a catalyst into contact with propylene, or propylene and an α-olefin, and bringing an electron donor compound into contact with the resulting product to produce a propylene-based block copolymer, the catalyst including a solid catalyst component that includes titanium, magnesium, a halogen, and an internal electron donor compound, a specific organoaluminum compound, and a specific external electron donor compound.

Claim (Index 1):
A method for producing a propylene-based block copolymer comprising:\n a first step of homopolymerizing propylene during which an electron donor compound (IV) is added to form a propylene homopolymer by bringing an olefin polymerization catalyst into contact with propylene; subsequent to the first step, a second step of copolymerizing propylene and an \u03b1-olefin other than propylene in the presence of the olefin polymerization catalyst and the propylene homopolymer; the olefin polymerization catalyst comprising a solid catalyst component for olefin polymerization that comprises titanium, magnesium, a halogen, and an internal electron donor compound, an organoaluminum compound represented by a general formula (I), and an external electron donor compound represented by a general formula (II) or an external electron donor compound represented by a general formula (III),\n R 1 p AlQ 3-p \u2003\u2003(I) \n wherein R 1  is a hydrocarbyl group having 1 to 6 carbon atoms, p is a real number that satisfies 0<p\u22643, provided that a plurality of R 1  are either identical to or different from each other when a plurality of R 1  are present, and Q is a hydrogen atom, a hydrocarbyloxy group having 1 to 6 carbon atoms, or a halogen atom, provided that a plurality of Q are either identical to or different from each other when a plurality of Q are present,\n R 2 Si(OR 3 ) 3 \u2003\u2003(II) \n wherein R 2  is a hydrogen atom, a linear alkyl group having 1 to 20 carbon atoms, a branched alkyl group having 3 to 20 carbon atoms, a vinyl group, an allyl group, a linear or branched alkenyl group having 3 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, a cycloalkenyl group having 3 to 20 carbon atoms, an aromatic hydrocarbon group having 6 to 24 carbon atoms, a nitrogen atom-containing hydrocarbon group having 2 to 24 carbon atoms that is terminated by a carbon atom, or an amino group having 2 to 24 carbon atoms, and R 3  is a linear alkyl group having 1 to 20 carbon atoms, a branched alkyl group having 3 to 20 carbon atoms, a vinyl group, an allyl group, a linear or branched alkenyl group having 3 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, a cycloalkenyl group having 3 to 20 carbon atoms, or an aromatic hydrocarbon group having 6 to 24 carbon atoms, provided that the three R 3  are either identical to or different from each other,\n (R 4 R 5 N)Si(OR 6 ) 3 \u2003\u2003(III) \n wherein R 4  and R 5  are a hydrogen atom, a linear alkyl group having 1 to 20 carbon atoms, a branched alkyl group having 3 to 20 carbon atoms, a vinyl group, an allyl group, a linear or branched alkenyl group having 3 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, a cycloalkenyl group having 3 to 20 carbon atoms, an aromatic hydrocarbon group having 6 to 24 carbon atoms, a nitrogen atom-containing hydrocarbon group having 2 to 24 carbon atoms that is terminated by a carbon atom, or an amino group having 2 to 24 carbon atoms, provided that R 4  and R 5  are either identical to or different from each other, and are optionally bonded to each other to form a ring, and R 6  is a linear alkyl group having 1 to 20 carbon atoms, a branched alkyl group having 3 to 20 carbon atoms, a vinyl group, an allyl group, a linear or branched alkenyl group having 3 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, a cycloalkenyl group having 3 to 20 carbon atoms, or an aromatic hydrocarbon group having 6 to 24 carbon atoms, provided that the three R 6  are either identical to or different from each other.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 98.0
- Lexical Diversity: 1.96491
- Patent Class: 525.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15504482', '15109611', '14427204', '14131052', '14770974']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8114106947094086
- 35 USC 102 Novelty (BERT): 0.5529197146294832
- Combined Prediction Score: 0.7855615967014161
- Mean Citation Score: 388.883534
- Max Citation Score: 447.78867
- Similarity Product: 426.56359482804544

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test