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公开(公告)号：US20070066693A1
公开(公告)日：2007-03-22
申请号：US10568771
申请日：2004-07-14
IPC分类号： C08J9/00
CPC分类号： C08J9/16 , C08J9/0061 , C08J9/20 , C08J2203/14 , C08J2325/06 , C08J2491/00
摘要： The invention relates to an expandable polystyrene composition in the form of expandable beads, comprising by weight (1) 100 parts of a styrene polymer, (2) from 2.2 to less than 4.0 parts of at least one blowing agent, and (3) from 0.01 to 0.4 part of at least one plasticizing. The composition is particularly useful for manufacturing medium density expanded moulded polystyrene objects, particularly with a density from 40 to 190 g/l. The invention also relates to a process for manufacturing such objects, employing an expandable polystyrene composition in the form of beads containing by weight (1) 100 parts of a styrene polymer, (2) from 2.2 to less than 4.0 parts of at least one blowing agent, and (3) from 0 to 0.4 part of at least one plasticizing agent. The process comprises (i) a pre-expansion stage by heating the expandable beads so as to form pre-expanded beads with a bulk density of 40 to 190 g/l, (ii) a stabilization stage by contacting the pre-expanded beads with a gaseous medium at 0 to 40° C., under an absolute pressure of 50 to 160 kPa, for a period of 6 to 48 hours, and (iii) a moulding stage by introducing and heating the beads thus stabilized into a mould. The invention also relates to pre-expanded beads with a bulk density of 40 to 190 g/l, containing by weight (a) 100 parts of a styrene polymer, (b) from 0.5 to less than 3.0 parts of at least one blowing agent, and (c) from 0 to 0.4 part of at least one plasticizing agent.
摘要翻译： 本发明涉及可发泡珠粒形式的可发性聚苯乙烯组合物，其包含：（1）100份苯乙烯聚合物，（2）2.2至小于4.0份至少一种发泡剂，和（3） 0.01至0.4份至少一种增塑剂。 该组合物特别适用于制造中密度发泡模塑聚苯乙烯物体，特别是密度为40至190g / l。 本发明还涉及一种用于制造这种物体的方法，使用以重量计的珠粒形式的可发性聚苯乙烯组合物（1）100份苯乙烯聚合物，（2）2.2至小于4.0份至少一种吹塑 试剂，和（3）0至0.4份至少一种增塑剂。 该方法包括（i）通过加热可膨胀珠粒以形成体积密度为40至190g / l的预发泡珠粒的预膨胀阶段，（ii）通过使预发泡的珠粒与 0至40℃的气态介质，绝对压力为50至160kPa，时间为6至48小时;以及（iii）通过引入和加热稳定到模具中的珠粒的成型阶段。 本发明还涉及体积密度为40至190g / l的预发泡珠粒，其含量为（a）100份苯乙烯聚合物，（b）0.5至小于3.0份的至少一种发泡剂 ，和（c）0至0.4份至少一种增塑剂。
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公开(公告)号：US08536240B2
公开(公告)日：2013-09-17
申请号：US10568771
申请日：2004-07-14
CPC分类号： C08J9/16 , C08J9/0061 , C08J9/20 , C08J2203/14 , C08J2325/06 , C08J2491/00
摘要： An expandable polystyrene composition in the form of expandable beads, comprising by weight (1) 100 parts of a styrene polymer, (2) from 2.2 to less than 4.0 parts of at least one blowing agent, and (3) from 0.01 to 0.4 part of at least one plasticizing. The composition is particularly useful for manufacturing medium density expanded moulded polystyrene objects, particularly with a density from 40 to 190 g/l. A process for manufacturing such objects,is provided, together with pre-expanded beads with a buld density of 40 to 190 g/l, containing by weight (a) 100 parts of a styrene polymer, (b) from 0.5 to less than 3.0 parts of at least one blowing agent, and (c) from 0 to 0.4 part of at least one plasticizing agent.
摘要翻译： 发泡珠形式的可发性聚苯乙烯组合物，其包含（1）100份苯乙烯聚合物，（2）2.2至小于4.0份至少一种发泡剂，和（3）0.01至0.4份 的至少一种增塑剂。 该组合物特别适用于制造中密度发泡模塑聚苯乙烯物体，特别是密度为40至190g / l。 提供了一种制造这种物体的方法，连同预先发泡的珠粒一起，其密度为40至190g / l，包含重量百分比（a）100份苯乙烯聚合物，（b）0.5至小于3.0 至少一种发泡剂的部分，和（c）0至0.4份至少一种增塑剂。
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公开(公告)号：US06271272B1
公开(公告)日：2001-08-07
申请号：US09338584
申请日：1999-06-23
IPC分类号： C08J920
CPC分类号： C08J9/0061 , C08J9/20 , C08J2203/14 , C08J2325/06 , C08J2491/00
摘要： The present invention relates to a homogeneous composition of an expandable styrene polymer in the form of beads comprising (a) 100 parts b.w. of a styrene polymer having a weight-average molecular mass of 150,000 to 300,000 and a residual monomer content of less than 2,000 ppm, (b) from 2 to 9 parts by weight of at least one blowing agent comprising n-pentane, (c) from 0.1 to less than 1.0 part by weight of a petroleum wax comprising a mixture of C18 to C80 alkanes, and (d) from 0 to 1.0 part by weight of a nucleating agent chosen from synthetic Fisher-Tropsch or polyolefin waxes. The composition allows the step of pre-expanding the beads to be improved by increasing the rate of expansion of the beads and by improving the productivity of the pre-expansion step, without substantially affecting the final molding step.
摘要翻译： 本发明涉及珠粒形式的可发性苯乙烯聚合物的均匀组合物，其包含（a）100份b.w. 的重均分子量为150,000至300,000，残余单体含量小于2,000ppm的苯乙烯聚合物，（b）2至9重量份的至少一种包含正戊烷的发泡剂，（c） 0.1至小于1.0重量份的包含C18至C80烷烃的混合物的石油蜡，和（d）0至1.0重量份的选自合成的费 - 托或聚烯烃蜡的成核剂。 组合物允许通过增加珠粒的膨胀速率和提高预膨胀步骤的生产率来改进预先膨胀珠粒的步骤，而基本上不影响最终成型步骤。
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