• 专利标题:   Polymeric positive temperature coefficient nano coating material for normal temperature thermal control, comprises low-melting-point paraffin, conductive filler, dispersing modifier, low-temperature initiator, emulsifier and deionized water.
  • 专利号:   CN114672250-A
  • 发明人:   TAO J, CHEN X
  • 专利权人:   BEIJING FUTONG ELECTRONIC TECHNOLOGY CO
  • 国际专利分类:   C09D191/06, C09D005/24
  • 专利详细信息:   CN114672250-A 28 Jun 2022 C09D-191/06 202278 Chinese
  • 申请详细信息:   CN114672250-A CN10429164 22 Apr 2022
  • 优先权号:   CN10429164

▎ 摘  要

NOVELTY - Polymeric positive temperature coefficient (PPTC) nano coating material comprises 100 pts. wt. low-melting-point paraffin, 60-150 pts. wt. conductive filler, 3-8 pts. wt. dispersing modifier, 0.1-0.8 pts. wt. low-temperature initiator, 1-3 pts. wt. emulsifier and 200-300 pts. wt. deionized water. USE - Polymeric positive temperature coefficient nano coating material for normal temperature thermal control and circuit protection and electric heater. ADVANTAGE - The PPTC nano-coating material has good coating property and stability, and high PTC effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing PPTC nano coating material, which involves: (1) adding the dispersion modifier, low-temperature initiator and conductive filler into the low-melting-point paraffin wax at the temperature of 55-70℃, stirring to uniformly mix components, and then dispersing uniformly by adopting ultrasonic waves to obtain composite conductive material; (2) adding the emulsifier into the deionized water to be dissolved into a transparent state to obtain an emulsion; (3) pouring the emulsion into the composite conductive material at the temperature of 55-70℃ while stirring to ensure that the emulsion is completely uniform to obtain nano emulsion with the average particle size of 100-300 nm; and (4) coating the nano emulsion into a coating with the thickness of 300-800 nm, and curing at 70-90℃ to obtain nano PPTC coating material.