PURPOSE: To obtain a foamable melt processible fluoropolymer resin composition by blending BN with a specific inorganic salt. ;CONSTITUTION: This nucleation system is obtained by blending (i) BN, and (ii) an inorganic salt which is thermally stable at the extruding temperature of fluoropolymers and consist of metal cation and multi-atomic anion and meets formulae I-III (r = crystal ion radius of cation(Å); g = valence of cation; pka=log of ka for the reaction of formula IV; A = anion; H = hydrogen; q=absolute number of valence of anion). The foamable composition comprising a fluoropolymer is obtained by blending a fluoropolymer with ≥35 wt.% of fluorine content, and the component (i) with 0.02-2.0 wt.% and the said nucleation system comprising the component (ii) with 25-1000 ppm for the obtained composition, respectively.;COPYRIGHT: (C)1989,JPO展开▼
机译:用途:通过将BN与特定的无机盐共混来获得可发泡的可熔融加工的含氟聚合物树脂组合物。 ;组成:该成核体系是通过共混(i)BN和(ii)在含氟聚合物的挤出温度下是热稳定的,由金属阳离子和多原子阴离子组成,并满足式I-III(r =阳离子的晶体离子半径(Å); g =阳离子的化合价; pka =式IV的反应的ka的对数; A =阴离子; H =氢; q =阴离子化合价的绝对数)。包含氟聚合物的可发泡组合物是通过将氟含量≥35重量%的氟聚合物和0.02-2.0重量%的组分(i)和包含25-1000的组分(ii)的成核体系共混而获得的。分别为所得组合物的ppm .;版权:(C)1989,JPO展开▼
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