结合磷型丙烯酸酯阻燃压敏胶的制备与性能

Preparation and properties of a flame retardant acrylic pressure-sensitive adhesive copolymerized with a monomer containing phosphate

将丙烯酸聚醚磷酸酯与丙烯酸酯进行自由基溶液聚合,制得具有本征阻燃性能的结合磷型丙烯酸酯共聚物溶液,然后将该溶液与油性聚磷酸铵浆料共混制得结合磷型丙烯酸酯阻燃压敏胶。考察了引发剂用量、单体配比、丙烯酸聚醚磷酸酯用量、聚磷酸铵用量等因素对压敏胶的压敏性和阻燃性的影响规律,并用IR和TG对共聚物进行了表征。结果表明,当丙烯酸丁酯、丙烯酸羟乙酯、醋酸乙烯酯、丙烯酸-2-乙基己酯、丙烯酸和丙烯酸聚醚磷酸酯(PAM-300)的质量比为56.0∶4.2∶23.7∶14.0∶2.1∶10.0,引发剂质量分数为0.6%,聚磷酸铵质量分数为24%时,可制得阻燃性和压敏性均佳的压敏胶,所得压敏胶阻燃性能和常规性能均与进口阻燃压敏胶BMS5-133D的性能相当。

A series of acrylic copolymer solutions have been synthesized by solution radical polymerization using acrylic polyether phosphate as a co-monomer, and flame retardant acrylate pressure-sensitive adhesives were pre- pared by adding ammonium polyphosphate as a flame retardant. The effects of varying the initiator dosage, the ratio of monomers, the amounts of phosphate monomer, as well as the mass ratio of ammonium polyphosphate on the pressure sensitivity and flame retardant properties of the acrylate pressure-sensitive adhesive were investigated in de- tail. The copolymers were characterized by infrared spectroscopy and thermogravimetric analysis. When the mass ratio of butyl acrylate, 2-ethylhexyl ester, vinyl acetate, 2-hydroxyethyl acrylate, acrylic acid and PAM-300 was 56.0： 4. 2： 23.7： 14.0： 2. 1 ： 10.0, and the mass fraction of the initiator was 0.6% , the atamonium polyphosphate loading was 24% , the performance of the pressure-sensitive adhesive was identical to that of the imported commer- cial sample BMS5-133D. This shows that a flame retardant pressure-sensitive adhesive can be easily prepared using acrylic polyether phosphate as a co-monomer, and mixing the resulting adhesive with a small amount of inorganic flame retardant can improve its intrinsic flame retardant properties significantly. The earlier problem of having to compromise between the pressure-sensitive ability and the flame retardant ability can be compeletely overcome by means of this method.