• 专利标题:   Aqueous based PTC conductive coating comprises PTC functional slurry including PTC functional components having paraffin wax, stearic acid, emulsifier and first defoamer and conductive paste having adhesive, defoamer and wetting and water.
  • 专利号:   CN112391097-A, CN112391097-B
  • 发明人:   ZHANG L
  • 专利权人:   MATERIAL IND TECHNOLOGY RES INST BEIJI
  • 国际专利分类:   C09D163/00, C09D191/06, C09D005/24, C09D007/63
  • 专利详细信息:   CN112391097-A 23 Feb 2021 C09D-163/00 202122 Pages: 11 Chinese
  • 申请详细信息:   CN112391097-A CN10745011 13 Aug 2019
  • 优先权号:   CN10745011

▎ 摘  要

NOVELTY - Aqueous based PTC conductive coating comprises PTC functional slurry and conductive slurry in mass ratio of (30-50): (50-70). The PTC functional slurry comprises 20-35 wt.% PTC functional components and 65-80 wt.% water. The PTC functional components includes 15-30 wt.% paraffin wax, 45-65 wt.% stearic acid, 10-25 wt.% emulsifier and 0.1-1 wt.% first defoamer. The conductive paste includes 30-40 wt.% adhesive, 0.3-1 wt.% second defoamer, 1-10 wt.% wetting and dispersing agent, 5-20 wt.% conductive carbon material and 40-60 wt.% water. USE - The aqueous based PTC conductive coating is useful in planar electric heating device (claimed). ADVANTAGE - The aqueous based PTC conductive coating has excellent self-limiting temperature performance; and is safe and environmentally friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing aqueous based PTC conductive coating comprising (a) mixing the components in PTC functional components to melt the paraffin and stearic acid under heating conditions to obtain a mixed liquid, mixing and emulsifying with water to obtain PTC functional slurry material, (b) mixing and grinding adhesive, second defoamer, wetting and dispersing agent and the conductive carbon material with water to obtain the conductive slurry and (c) mixing PTC functional paste with the conductive paste.