PATENT CLAIM ANALYSIS

Application Number: 15766434
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-11
Patent Classification: ["524", "417000"]

Abstract:
The present invention relates to a polyimide film and a preparation method thereof. According to the present invention, a polyamic acid solution having a high weight-average molecular weight may be obtained by adjusting viscosity and solid content of the polyamic acid solution, and thus, a desired polyimide film may be prepared therefrom. Furthermore, since a length of carbon chains rearranged during graphitization is increased, a graphite sheet having excellent thermal conductivity can be prepared from the polyimide film of the present invention. Also, since the polyimide film has improved windability by further including inorganic particles as a filler, it may facilitate the wind operation.

Claim (Index 1):
A method of preparing a polyimide film for graphite, the method comprising:\n (a) preparing a polyamic acid solution by reaction of a diamine monomer with an acid dianhydride monomer in a solvent; (b) mixing the polyamic acid solution with an imidization solution to prepare a gel film; and (c) imidizing the gel film by performing a heat treatment, wherein, a solid content (\u03b2 1 ) of the polyamic acid solution is in a range of 15% to 20% where the solid content (\u03b2 1 ) of the polyamic acid solution denotes a weight percentage of the monomers based on a total weight of the solvent and the monomers used in the reaction; the polyamic acid solution has a viscosity (\u03b2 2 ) (23\u00b0 C.) of 55,000 cps to 900,000 cps; and the solid content (\u03b2 1 ) and viscosity (\u03b2 2 ) of the polyamic acid solution satisfy Equation 1:\n \u22120.87\u2264\u22121.46 log 10 (\u03b2 1 )+0.18 log 10 (\u03b2 2 ).\u2003\u2003[Equation 1]

Metadata:
- Claim Count in Document: 9.0
- Percentile: 91.0
- Lexical Diversity: 1.69118
- Patent Class: 524.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15360253', '13191027', '13259858', '15668964', '10343277']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8083418537459688
- 35 USC 102 Novelty (BERT): 0.4738646987821633
- Combined Prediction Score: 0.7748941382495883
- Mean Citation Score: 195.226474
- Max Citation Score: 208.10262
- Similarity Product: 156.0505075181115

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

Dataset: test