The invention relates to a method for preparing expandable particles containing polylactic acid, which comprises the following steps: a) melting and mixing the following components: i) based on the total weight of components I to I I i, 65 to 95 wt% of polylactic acid, in which polylactic acid consists of components of the following proportions: I a) 65 to 95 wt% of polylactic acid containing 0.3% to 5 wt% of D lactic acid, and ib) 5 to 3 wt% of polylactic acid. Polylactic acid with 10 to 18 wt% D lactic acid; I i) Aliphatic polyesters with 15 to 35 wt% weight based on the total weight of components I to I I I. The polyesters are selected from polybutylene succinate, polybutylene succinate, copolybutylene adipate and polybutylene succinate copolyester, butylene sebacate, and I i) compatibilization based on the total weight of components I to I I i, ranging from 0 to 2 wt%. (i v) based on the total weight of component I to I I i, additives of 0.1 to 5 wt%, additives of 0.1 to 5 wt%, and additives of 0.1 to 5 wt%. b) mixing the following components into polymer melts by means of static or dynamic mixers at least 140 C: v) based on the total weight of component I to I v, organic foaming agents of 1 to 7 wt% and V i) co-foaming agents of 0.01 to 5 wt% are selected from nitrogen, carbon dioxide, argon, helium and their mixtures. C) is discharged through a template with perforation, the diameter of the perforation at the exit of the die is not more than 1.5mm, and d) Under pressure of 1 to 21 bar, the melt containing foaming agent is directly granulated under water outside the template.
【技术实现步骤摘要】
【国外来华专利技术】制备可膨胀的含聚乳酸的颗粒的方法本专利技术涉及一种制备可膨胀的含聚乳酸的颗粒的方法,其包括以下步骤:a)熔化并混合以下组分:i)基于组分i至iii的总重量计,65至95重量%的聚乳酸,其中聚乳酸由以下组分组成:ia)65至95重量%的含有0.3%至5%D-乳酸的聚乳酸,和ib)5至35重量%的含有10%至18%D-乳酸的聚乳酸;ii)基于组分i至iii的总重量计,15至35重量%的脂族聚酯,所述聚酯选自聚丁二酸丁二醇酯、聚丁二酸丁二醇酯-共-己二酸丁二醇酯和聚丁二酸丁二醇酯-共-癸二酸丁二醇酯;iii)基于组分i至iii的总重量计,0至2重量%的增容剂;和iv)基于组分i至iii的总重量计,0.1至5重量%的添加剂,b)借助静态或动态混合器在至少140℃的温度下将以下组分混入聚合物熔体中:v)基于组分i至iv的总重量计,1至7重量%的有机发泡剂和vi)0.01至5重量%的共发泡剂,其选自氮气、二氧化碳、氩气、氦气及其混合物,c)通过带有穿孔的模板排出,所述穿孔在模具出口处的直径为至多1.5mm,和d)在1至21bar的压力下,直接在模板下游将含有发泡剂的熔体水下造粒。制备可膨胀的含聚乳酸的颗粒(可模制的含聚乳酸的泡沫)的方法记载于WO2001/012706、特别是WO2011/086030中。然而,其中描述的可膨胀的含发泡剂的、含聚乳酸的颗粒的储存期并不完全令人满意。WO2008/130226和JP2007169394记载了密度为10至100g/l的膨胀的或可膨胀的可模制泡沫,其已经预发泡并且可以用发泡剂后浸渍。储存期对于那些可模制的泡沫并不是特别重要,因为 ...
【技术保护点】
1.一种制备可膨胀的含聚乳酸的颗粒的方法,其包括以下步骤:a)熔化并混合以下组分:i)基于组分i至iii的总重量计,65至95重量%的聚乳酸,其中聚乳酸由以下组分组成:ia)65至95重量%的含有0.3%至5%D‑乳酸的聚乳酸,和ib)5至35重量%的含有10%至18%D‑乳酸的聚乳酸;ii)基于组分i至iii的总重量计,5至35重量%的脂族聚酯,所述聚酯选自聚丁二酸丁二醇酯、聚丁二酸丁二醇酯‑共‑己二酸丁二醇酯和聚丁二酸丁二醇酯‑共‑癸二酸丁二醇酯;iii)基于组分i至iii的总重量计,0至2重量%的增容剂;和iv)基于组分i至iii的总重量计,0.1至5重量%的添加剂,b)借助静态或动态混合器在至少140℃的温度下将以下组分混入聚合物熔体中:v)基于组分i至iv的总重量计,1至7重量%的有机发泡剂和vi)0.01至5重量%的共发泡剂,其选自氮气、二氧化碳、氩气、氦气及其混合物,c)通过带有穿孔的模板排出,所述穿孔在模具出口处的直径为至多1.5mm,和d)在1至21bar的压力下,直接在模板下游将含有发泡剂的熔体水下造粒。
【技术特征摘要】
【国外来华专利技术】2016.06.07 EP 16173236.71.一种制备可膨胀的含聚乳酸的颗粒的方法,其包括以下步骤:a)熔化并混合以下组分:i)基于组分i至iii的总重量计,65至95重量%的聚乳酸,其中聚乳酸由以下组分组成:ia)65至95重量%的含有0.3%至5%D-乳酸的聚乳酸,和ib)5至35重量%的含有10%至18%D-乳酸的聚乳酸;ii)基于组分i至iii的总重量计,5至35重量%的脂族聚酯,所述聚酯选自聚丁二酸丁二醇酯、聚丁二酸丁二醇酯-共-己二酸丁二醇酯和聚丁二酸丁二醇酯-共-癸二酸丁二醇酯;iii)基于组分i至iii的总重量计,0至2重量%的增容剂;和iv)基于组分i至iii的...
【专利技术属性】
技术研发人员:B·D·S·萨姆帕斯,J·洛曼,P·古特曼,
申请(专利权)人:巴斯夫欧洲公司,
类型:发明
国别省市:德国,DE
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