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KR-102962996-B1 - synthetic leather

KR102962996B1KR 102962996 B1KR102962996 B1KR 102962996B1KR-102962996-B1

Abstract

An article is provided which comprises, based on the total weight of the upper layer, (A) a composition comprising (i) 70% to 88% by weight of an ethylene-based polymer and (ii) 12% to 30% by weight of oil. The article further comprises (B) a lower layer composed of textile.

Inventors

  • 양, 윈펑
  • 리우, 쉐쥔
  • 양, 홍
  • 매든지안, 리사 에스.

Assignees

  • 다우 글로벌 테크놀로지스 엘엘씨

Dates

Publication Date
20260511
Application Date
20210409

Claims (15)

  1. Synthetic leather including the following A and B: A. An upper layer composed of a composition comprising (i) to (iii) below, based on the total weight of the upper layer: (i) 70% to 88% by weight of an ethylene-based polymer, wherein the ethylene-based polymer is composed of (i) ethylene and (ii) a C4 to C8 α-olefin comonomer, and is selected from the group consisting of ethylene/octene copolymers, ethylene/octene multiblock copolymers, and combinations thereof; (ii) 12% to 30% by weight of oil; and (iii) Optional additives, The sum of (ii) and (iii) amounts to 100 weight% of the upper layer, and The above composition has a melt index (MI) greater than 2.0 g/10 min; and B. Lower layer containing textile.
  2. delete
  3. In paragraph 1, the synthetic leather is an ethylene-octene copolymer having the following: Density of 0.857 g/cc to 0.88 g/cc; A melt index of 0.5 g/10 min to 20 g/10 min; and Shore A value of 75 or less.
  4. In claim 1, the ethylene-based polymer is an ethylene/octene multiblock copolymer having the following, synthetic leather: Density of 0.857 g/cc to 0.88 g/cc; A melt index of 0.5 g/10 min to 20 g/10 min; and Shore A value of 75 or less.
  5. In paragraph 1 or 3, 80% to 87% by weight of ethylene/octene copolymer; It comprises 13% to 20% by weight of oil; Synthetic leather with an upper layer having a bally flex resistance value of over 86,000.
  6. In paragraph 1, 30% to 50% by weight of ethylene/octene multiblock copolymer; 30% to 50% by weight of an ethylene/octene copolymer different from an ethylene/octene multiblock copolymer; It comprises 13% to 30% by weight of oil; Synthetic leather with an upper layer having a Bali bend resistance value of over 86,000.
  7. delete
  8. In any one of paragraphs 1, 3, and 4, the composition of the upper layer is synthetic leather having a Shore A value of less than 80.
  9. In any one of paragraphs 1, 3, and 4, a synthetic leather comprising the following C: C. An intermediate foam layer composed of a composition comprising (i) and (ii) based on the total weight of the intermediate foam layer: (i) an ethylene-based polymer, wherein the ethylene-based polymer is composed of (i) ethylene and (ii) a C4 to C8 α-olefin comonomer, and is selected from the group consisting of ethylene/octene copolymers and ethylene/octene multiblock copolymers and combinations thereof; and (ii) 10% to 30% by weight of oil.
  10. delete
  11. In paragraph 9, the ethylene-based polymer of the intermediate foam layer is an ethylene/octene copolymer having the following, synthetic leather: Density of 0.857 g/cc to 0.88 g/cc; A melt index of 0.5 g/10 min to 20 g/10 min; and Shore A value of 75 or less.
  12. In claim 9, the ethylene-based polymer of the intermediate foam layer is an ethylene/octene multiblock copolymer having the following, synthetic leather: Density of 0.857 g/cc to 0.88 g/cc; A melt index of 0.5 g/10 min to 20 g/10 min; and Shore A value of 75 or less.
  13. In paragraph 9, the intermediate foam layer 80% to 87% by weight of ethylene/octene copolymer; Contains 10% to 20% by weight of oil; Synthetic leather with an intermediate foam layer having a volley bending resistance value of over 60,000.
  14. In paragraph 9, the intermediate foam layer 30% to 50% by weight of ethylene/octene multiblock copolymer; 30% to 50% by weight of an ethylene/octene copolymer different from an ethylene/octene multiblock copolymer; Contains 10% to 30% by weight of oil; Synthetic leather with an intermediate foam layer having a volley bending resistance value of over 86,000.
  15. Synthetic leather, wherein in any one of paragraphs 1, 3, and 4, the oil is mineral oil, excluding aromatic oil, naphthenic oil, paraffinic oil, and triglyceride vegetable oil, synthetic hydrocarbon oil, silicone oil, and combinations thereof.

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- 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, an article is provided, which comprises an upper layer composed of (A) (i) 70 weight% to 88 weight% of an ethylene-based polymer and (ii) 12 weight% to 30 weight% of an oil, based on the total weight of the upper layer. The article further comprises (B) a lower layer composed of a textile. Figure 1 is a dynamic mechanical spectroscopy graph comparing Invention Example 3 (IE3) and Comparison Sample 7 (CS7).definition Any references to the periodic table of elements are from the publication [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 lower and upper limits and include all values therefrom. In the case of a range including explicit values (e.g., a range of 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, implied by the context, or customary in the art, all parts and percentages are based on weight, and all test methods are in use as of the filing date of this invention. 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 to a mixture of materials including not only the composition but also 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” excludes any components, steps, or procedures that are not specifically described or enumerated. Unless otherwise noted, the term “or” refers to the enumerated members individually as well as in