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KR-102962994-B1 - synthetic leather

KR102962994B1KR 102962994 B1KR102962994 B1KR 102962994B1KR-102962994-B1

Abstract

The present disclosure provides an article. In one embodiment, the article comprises an upper layer composed of (A) (i) 51 weight% to 90 weight% of a propylene-based polymer and (ii) 10 weight% to 49 weight% of an ethylene/octene multiblock copolymer having hard segments and soft segments. The ethylene/octene multiblock copolymer has a soft segment melting temperature (SS-Tm) of less than 2°C. The article also comprises (B) a lower layer composed of textile.

Inventors

  • 양, 윈펑
  • 리우, 쉐쥔
  • 매든지안, 리사 에스.
  • 페섹, 스테이시 엘.
  • 얀, 진리앙
  • 문로, 제프리 씨.

Assignees

  • 다우 글로벌 테크놀로지스 엘엘씨

Dates

Publication Date
20260511
Application Date
20210409

Claims (10)

  1. Synthetic leather including the following A and B: A. An upper layer composed of a composition including the following: (i) 51 wt% to 90 wt% of a propylene-based polymer; and (ii) an ethylene/octene multiblock copolymer having hard segments and soft segments in an amount of 10 to 49 weight%, wherein the soft segment contains 21 mol% to 35 mol% octene and has a soft segment melting temperature (SS-Tm) of less than 2°C; and B. Lower layer containing textile.
  2. delete
  3. In claim 1, the composition of the upper layer is synthetic leather having the following: (i) a bally flex resistance value greater than 60,000; and (ii) Shore A hardness of less than 80.
  4. Synthetic leather according to claim 1 or 3, wherein the propylene-based polymer is a propylene/ethylene copolymer having the following: Density of 0.85 g/cc to 0.87 g/cc; and Melt flow rate of 5 g/10 min to 30 g/10 min.
  5. In claim 1 or 3, the composition of the upper layer comprises synthetic leather: 10% to 49% by weight of the following A first ethylene/octene multiblock copolymer having hard segments and soft segments, wherein the first ethylene/octene multiblock copolymer has a soft segment melting temperature (SS-Tm) of less than 2°C; and A second ethylene/octene multiblock copolymer different from the first ethylene/octene multiblock copolymer, having a hard segment and a soft segment, and having a soft segment melting temperature (SS-Tm) of less than 2°C.
  6. In paragraph 1 or 3, synthetic leather comprising the following C: C. An intermediate foam layer composed of a composition including the following: (i) 51 wt% to 90 wt% of a propylene-based polymer; and (ii) an ethylene/octene multiblock copolymer having 10 to 49 weight% hard segments and soft segments, wherein the soft segment contains 21 mol% to 35 mol% octene and has a soft segment melting temperature (SS-Tm) of less than 2°C.
  7. delete
  8. In paragraph 6, the synthetic leather, wherein the propylene-based polymer of the intermediate foam layer is a propylene/ethylene copolymer having the following: Density of 0.85 g/cc to 0.87 g/cc; and Melt flow rate of 5 g/10 min to 30 g/10 min.
  9. In paragraph 6, the composition of the intermediate foam layer comprises the following, synthetic leather: 10 weight% to 49 weight% of A first ethylene/octene multiblock copolymer having hard segments and soft segments, wherein the first ethylene/octene multiblock copolymer has a soft segment melting temperature (SS-Tm) of less than 2°C; and A second ethylene/octene multiblock copolymer different from the first ethylene/octene multiblock copolymer, having a hard segment and a soft segment, and having a soft segment melting temperature (SS-Tm) of less than 2°C.
  10. In claim 9, the first ethylene/octene multiblock copolymer of the intermediate foam layer comprises 21 mol% to 35 mol% octene in the soft segment; Synthetic leather, wherein the second ethylene/octene multiblock copolymer of the intermediate foam layer comprises 21 mol% to 35 mol% octene in the soft segment.

Description

synthetic leather The applications of synthetic leather continue to expand. Synthetic leather is used to produce clothing, shoes, bags and luggage, home coverings, and automotive seats. Synthetic leather exhibits performance and tactile properties similar to natural leather. It has the additional advantage of being animal-friendly and is cheaper to produce compared to natural leather. Conventional synthetic leather has disadvantages. The production of polyurethane-based synthetic leather (PU leather) requires the use of organic solvents, typically dimethylformamide (DMF), to form the polyurethane synthetic leather matrix. DMF is harmful to manufacturers, processors, consumers, and the environment. Polyvinyl chloride synthetic leather (PVC-leather) requires halogenated polymers and plasticizers, generally phthalate-based plasticizers. Both halogenated polymers and phthalate-based plasticizers are harmful to manufacturers, processors, consumers, and the environment. Polyolefin elastomer-based synthetic leather (POE leather) is advantageous because it is halogen-free and phthalate-free, and its production eliminates the need for harmful solvents such as DMF. POE leather offers the additional benefit of being recyclable due to its thermoplastic properties. In terms of performance, POE exhibits excellent weather resistance and low-temperature flexibility, as well as resistance to hydrolysis and yellowing. Furthermore, because POE leather has a lower density compared to PU leather and PVC leather, it is gaining popularity in the current lightweighting trend in the luggage/bag, footwear, and automotive interior segments. Consequently, the industry recognizes the need for POE leather. The industry recognizes the need for POE leather that meets or exceeds the bally flex resistance performance and flexibility of PU leather and/or PVC synthetic leather. The present disclosure provides an article. In one embodiment, the article comprises an upper layer composed of (A) (i) 51 weight% to 90 weight% of a propylene-based polymer and (ii) 10 weight% to 49 weight% of an ethylene/octene multiblock copolymer having hard segments and soft segments. The ethylene/octene multiblock copolymer has a soft segment melting temperature (SS-Tm) of less than 2°C. The article also comprises (B) a lower layer composed of textile. Figure 1 shows a scanning electron microscope (SEM) image of Invention Example 7 (IE7) (left) and a SEM image of Comparative Sample 18 (CS18) (right). Figure 2 shows the SEM of IE1 (left) and CE6 (right). Figure 3 shows the SEM of CS9. definition Any references to the periodic table of elements are from the publications of CRC Press, Inc. (1990–1991). References to the groups of elements in this periodic table follow the new notation for group numbering. For the purposes of U.S. patent practice, the contents of any referenced patent, patent application, or disclosure are incorporated by reference in their entirety, particularly with respect to the disclosure of definitions and the general knowledge of the art (without contradiction to any definition specifically provided in this disclosure) (or equivalent U.S. versions thereof are also incorporated by reference). The numerical ranges disclosed herein include all values, including lower and upper limits. In the case of a range including explicit values (e.g., 1 or 2, or 3 to 5, or 6, or 7), any sub-range between any two explicit values is included (e.g., the above range of 1 to 7 includes sub-ranges of 1 to 2; 2 to 6; 5 to 7; 3 to 7; 5 to 6; etc.). Unless otherwise specified or implied in the context, all parts and percentages are based on weight, and all test methods are in use as of the filing date of this disclosure. As used herein, the terms “blend” or “polymer blend” refer to a blend of two or more polymers. Such blends may be miscible (not phase-separated at the molecular level) or may not be miscible. Such blends may or may not phase-separate. Such blends may or may not contain one or more domain configurations when measured by transmission electron spectroscopy, light scattering, X-ray scattering, and other methods known in the art. The term "composition" refers not only to a mixture of materials containing the composition but also to reaction products and decomposition products formed from the materials of the composition. The terms “comprising,” “including,” “having,” and their derivatives are not intended to exclude the presence of any additional components, steps, or procedures, whether or not specifically disclosed. To avoid doubt, any composition claimed through the use of the term “comprising” may include any additional additives, adjuvants, or compounds, whether polymeric or not, unless otherwise noted. In contrast, the term “essentially consisting of” excludes any other components, steps, or procedures from the category of any subsequent enumeration, excluding those that are not essential to the feasibility of implementation. The term “consisting of