Halogen-free flame retardant PC/PBT alloy material and preparation method thereof

Abstract

The invention discloses a halogen-free flame retardant PC / PBT alloy material and a preparation method thereof. The alloy material has a blending system consisting of plastic alloy formed by blending PC resin and PBT resin and additives blended into the plastic alloy; the additives comprise flame retardants, compatible toughening agent, lubricating dispersant and antioxidant; the number of the flame retardants is three, wherein the first flame retardant is phosphate, the second flame retardant is sulfonate and the third flame retardant is polysiloxane; and the alloy material comprises the following components in part by weight: 50 to 80 parts of PC resin, 20 to 50 parts of PBT resin, 5 to 25 of three flame retardants, 5 to 20 parts of compatible toughening agent, 1.0 to 3.0 parts of lubricating dispersant and 0.1 to 0.6 parts of antioxidant. The halogen-free flame retardant PC / PBT alloy material has the advantages of high comprehensive mechanical strength, good flame retardant property, good forming workability, environmental protection and non-toxicity.

Description

technical field [0001] The invention relates to a polymer composite material and a preparation method thereof, in particular to a halogen-free flame-retardant PC / PBT alloy material and a preparation method thereof. Background technique [0002] PC / PBT alloy plastics can be used in the production of electronic appliances, communication equipment, modern office equipment, interior parts of rail transit vehicles, auto parts and other products. [0003] As people pay more and more attention to health, environment and ecological protection, the flame retardant standards and environmental protection standards of plastics are becoming more and more stringent. Excellent flame retardant performance, but also low toxicity and low smoke. For example, Sweden's TCO-99 and Nordic's Ecolable-9 (white swan) environmental protection label require that polyvinyl chloride resin and bromine-containing flame retardants should not be used as computer materials. Germany's Blue Angel logo (BlueAn...

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Problems solved by technology

[0004] Chinese patent document CN101407621A (application number 200810219445.3) discloses a flame-retardant PC / PBT plastic alloy and its production method. Lubricant; wherein the composite flame retardant is tetrabromobisphenol A polycarbonate oligomer and antimony trioxide, and the lubricant is silicone lubricant; the deficiency of this patent is: due to the use of bromine-containing flame retardant, resulting in The plastic parts produced with this alloy material will produce toxic and irritating hydrogen bromide gas during combustion, which is likely to cause secondary disasters (that is, cause suffocation, coma or even death of the victim). Such bromine-containing alloy flame-retardant materials have been banned banned in many countries

[0005] Chinese patent document CN101469123A (application number 200710301373.2) discloses a plastic alloy and its preparation method; the flame retardant used in the plastic alloy is a phosphoric ester flame retardant and / or a perfluorobutylsulfonate flame retardant; the The disadvantage of the patent is that the price of the flame retardant perfluorobutane sulfonate used is relatively high, so the production cost is relatively high

[0006] Chinese patent document CN100406520C (application number 200510022573.5) discloses an environmentally friendly flame-retardant PC / PBT plastic alloy; the composite flame retardant used in the plastic alloy is aromatic phosphate and benzyl silicone, and the compatibilizer used is MBS synthetic resin and SMAH, the toughening agent used is nano-calcium carbonate; the shortcoming of this patent is: using nano-calcium carbonate as the toughening agent, because in practical application, nano-calcium carbonate is very easy to agglomerate and difficult to disperse when used, Greatly affect the toughening effect

[0007] Chinese patent document CN101508834A (application number 200810241524.4) discloses a PC / PBT alloy and its preparation method; the flame retardant used in it is polyurethane flame retardant, and the toughening compatibilizer used is methyl methacrylate, Butadiene and styrene terpolymer; the disadvantage of this patent is that the content of PC is obviously higher than that of PBT, so the melt viscosity of the alloy plastic is high, forming and processing is difficult, and the notched impact strength is low

In addition, the halogen-free flame retardant PX-220 described in the specific examples of this document is actually a phosphate composite flame retardant, which is not consistent with the polyurethane flame retardant described in this document