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  • 专利标题:   Making a thermally and electrically conductive coating containing graphene on natural leather or on textile substrate for the production of synthetic leather, comprises formation of internal layer, intermediate layers and external layer.
  • 专利号:   WO2022023137-A1, KR2023048068-A, CN116157570-A, EP4189156-A1
  • 发明人:   CESAREO G G, RIZZI L G, BAMBINI A, RICHIE L G
  • 专利权人:   DIRECTA PLUS SPA, DIRECTA PLUS SPA
  • 国际专利分类:   C01B032/19, D06N003/00, D06N003/14
  • 专利详细信息:   WO2022023137-A1 03 Feb 2022 202219 Pages: 22 English
  • 申请详细信息:   WO2022023137-A1 WOEP070341 21 Jul 2021
  • 优先权号:   IT00018433, CN80058682, KR706413

▎ 摘　　要

NOVELTY - Making a thermally and electrically conductive coating containing graphene on natural leather or on a textile substrate suitable for the production of synthetic leather, characterized in that it comprises (a) formation of an internal layer (A), comprising at least one aliphatic polyurethanes, having a thickness from 10-50 pm, applied on the natural leather or the textile substrate, (b) formation of at least one intermediate layers (B;B1), each having a thickness from 10-50 pm, each comprising at least one aliphatic polyurethanes and graphene nano-platelets, where at least 90% of the graphene nano-platelets has a lateral dimension (x, y) from 50-50000 nm and a thickness (z) from 0.34-50 nm, and where the C/O ratio is greater than or equal to 100:1, and (c) formation of an external layer (C) comprising at least one aliphatic polyurethanes, having a thickness from 2-10 pm, applied on one of the intermediate layers (B;B1). USE - The method is useful for manufacture of garments or other articles e.g. seats, and sofas. ADVANTAGE - The method to give it surface finishes having particular aesthetic effects. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for natural or synthetic leather comprising a coating characterized in that it comprises an internal adhesive layer (A) comprising at least one aliphatic polyurethanes, having a thickness from 10-50 pm, in contact with the natural leather or with a textile substrate, at least one intermediate layers (B;B1), each having a thickness from 10-50 mu m, superimposed on the internal adhesive layer (A), each of the intermediate layers (B) comprising at least one aliphatic polyurethanes and nano-platelets of graphene, where at least 90% of the graphene nano-platelets has a lateral dimension (x, y) from 50-50000 nm and a thickness (z) from 0.34-50 nm, and where the C/O ratio is greater than or equal to 100:1, an outer layer (C), comprising at least one aliphatic polyurethanes, having a thickness from 2-10 mu m, superimposed on one of the intermediate layers (B;B1).