A kind of flame retardant copper clad laminate composition containing soft filler

Abstract

A flame retardant copper-clad plate composition containing a soft filler is disclosed. The composition includes, by weight, 60-90 parts of flame retardant epoxy resin, 10-40 parts of a soft composite filler, a curing agent the adding amount of which is 0.5-5% of the adding amount of the flame retardant epoxy resin, an accelerant the adding amount of which is 0.05-1% of the adding amount of the flame retardant epoxy resin and a solvent the adding amount of which is 30-60% of the total solid amount. The flame retardant epoxy resin includes phosphorus-containing epoxy resin, bromine-containing epoxy resin or a mixture with phosphorus-free bromine-free epoxy resin at any ratio. Chemical components of the soft composite filler are powder of blend melt, eutectic or mixtures of oxides and sulfates of silicon, magnesium, aluminum, antimony and barium elements. Raw materials are rich in source and low in price. The composition has obvious functions of inhibiting growth of microbes and funguses. The composition is low in Moh's hardness, and can reduce abrasion to processing equipment, thus significantly reducing the cost.

Description

technical field [0001] The invention belongs to the field of design and manufacture of printed circuit boards (PCBs), and in particular relates to a flame-retardant copper-clad laminate composition made of soft fillers. Background technique [0002] In the past fifty years, lead and its alloys such as solder and solder paste have been widely used in the processing fields of electronic PCB plating, HASL, welding and assembly. If these lead-containing electronic products are improperly disposed of in the process of manufacturing, processing, storage and disposal, lead and its lead ions will seep into the soil and water sources, causing pollution and passing through food chains such as fish, shrimp, vegetables, breathing, drinking water, etc. The material circulation route enters the human body. Lead will accumulate in human blood, and when it reaches a certain concentration, it will cause poisoning, manifested as ADHD, inattention, mental decline and even dementia; the digest...

AI Technical Summary

Problems solved by technology

The industry habitually divides the hardness into three segments: Mohs hardness 10-8 is high hardness, Mohs hardness 7-4 is medium hardness, Mohs hardness below 3 is low hardness (soft material), containing medium and high Mohs hardness fillers The copper clad laminate has a great wear and tear on the drill bit and gong cutter during drilling and gong shape, which accounts for a high proportion of the cost

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