公开(公告)号：US4762860A

公开(公告)日：1988-08-09

申请号：US863628

申请日：1986-05-15

申请人： Chung P. Park

发明人： Chung P. Park

IPC分类号： C08J9/00 ,  C08J9/14 ,  C08K5/00 ,  C08K5/05

CPC分类号： C08K5/05 ,  C08J9/0023 ,  C08J9/144 ,  C08K5/0025

摘要： An expandable ethylenic or styrenic polymer composition for production of lightly crosslinked foamed polymers and a process for controlling the degree of crosslinking of the polymer prior to extrusion foaming. The control is obtained by use of (a) a reversible gas-yielding crosslinking reaction which is delayed in the foam extrusion line in the presence of gaseous products (alcohols) and (b) added amounts of an alcohol such as an aliphatic alcohol. Suitable crosslinking agents include silanes, azido functional silanes, titanates, and amino compounds.

摘要翻译： 用于生产轻度交联的发泡聚合物的可膨胀的乙烯或苯乙烯聚合物组合物和在挤出发泡之前控制聚合物的交联度的方法。 通过使用（a）在气态产物（醇）和（b）加入量的醇如脂族醇的存在下在泡沫挤出生产线中延迟的可逆气体产生交联反应来获得对照。 合适的交联剂包括硅烷，叠氮官能的硅烷，钛酸酯和氨基化合物。

公开(公告)号：US4734441A

公开(公告)日：1988-03-29

申请号：US71443

申请日：1987-07-09

申请人： Chung P. Park

发明人： Chung P. Park

IPC分类号： C08J9/00 ,  C08J9/14 ,  C08J9/22

CPC分类号： C08J9/0061 ,  C08J2325/00 ,  Y10S264/05 ,  Y10S521/91

摘要： An expandable alkenyl aromatic polymer composition and methods of preparation are provided. The composition is admixed with a volatile blowing agent and an expansion aid which includes a polyphenylene ether. The composition may be extruded and then expanded by exposure to steam or hot air or may be impregnated with blowing agent and then expanded.

摘要翻译： 提供了一种可膨胀的链烯基芳族聚合物组合物及其制备方法。 将该组合物与包含聚苯醚的挥发性发泡剂和膨胀助剂混合。 组合物可以挤出，然后通过暴露于蒸汽或热空气而膨胀，或者可以用发泡剂浸渍，然后膨胀。

公开(公告)号：US4714716A

公开(公告)日：1987-12-22

申请号：US672001

申请日：1984-11-16

申请人： Chung P. Park

发明人： Chung P. Park

IPC分类号： B29C47/00 ,  B29K23/00 ,  B29K105/04 ,  C08J9/00 ,  C08J9/04 ,  C08J9/12 ,  C08J9/14

CPC分类号： C08J9/0066 ,  C08J9/0014

摘要： A substantially closed-celled linear polyolefin foam is made by melt processing under pressure a linear polyolefin together with a volatile blowing agent and a crosslinking agent and then expanding the polymer. Suitable crosslinking agents, including azido and vinyl functional silanes, organic peroxides, multifunctional vinyl monomers, and oxygen, increase the melt tension and melt viscosity of the polymer by lightly crosslinking the polymer with itself to enable the production of foams having improved properties in comparison with branched polyolefin foams.

摘要翻译： 通过在压力下通过熔融加工线性聚烯烃与挥发性发泡剂和交联剂一起制备基本上闭孔的直链聚烯烃泡沫体，然后使聚合物膨胀。 合适的交联剂，包括叠氮基和乙烯基官能硅烷，有机过氧化物，多官能乙烯基单体和氧，通过与聚合物本身轻度交联来增加聚合物的熔体张力和熔融粘度，使得能够生产具有改进性能的泡沫与 支链聚烯烃泡沫。

公开(公告)号：US4694027A

公开(公告)日：1987-09-15

申请号：US813315

申请日：1985-12-24

申请人： Chung P. Park

发明人： Chung P. Park

IPC分类号： C08J9/14

CPC分类号： C08J9/149 ,  C08J9/141 ,  C08J2323/04 ,  Y10S264/05 ,  Y10S521/91

摘要： An expandable polyolefin composition and a method of preparation are provided. Isobutane or mixtures of isobutane with other physical blowing agents are utilized to expand polyolefin compositions which have been modified by the addition of a stability control agent. The composition has a high degree of dimensional stability and exhibits minimal shrinkage during curing and/or aging.

公开(公告)号：US4663361A

公开(公告)日：1987-05-05

申请号：US843422

申请日：1986-03-24

申请人： Chung P. Park

发明人： Chung P. Park

IPC分类号： C08J9/12 ,  C08J9/14

CPC分类号： C08J9/149 ,  C08J9/141 ,  C08J2323/04 ,  Y10S264/05 ,  Y10S521/91

摘要： An expandable polyolefin composition and a method of preparation are provided. Isobutane or mixtures of isobutane with other physical blowing agents are utilized to expand polyolefin compositions which have been modified by the addition of a stability control agent. The composition has a high degree of dimensional stability and exhibits minimal shrinkage during curing and/or aging.

公开(公告)号：US4663360A

公开(公告)日：1987-05-05

申请号：US814567

申请日：1985-12-30

申请人： Chung P. Park ,  Gerald A. Garcia

发明人： Chung P. Park ,  Gerald A. Garcia

IPC分类号： C08J9/14 ,  C08L25/04

CPC分类号： C08J9/14 ,  B29C44/50 ,  B29K2025/00 ,  C08J2325/00 ,  Y10S264/05 ,  Y10S521/918

摘要： A steam expandable alkenyl aromatic polymer composition and methods of preparation are provided. The composition is mixed with a volatile blowing agent containing, as a primary blowing agent, dichlorodifluoromethane and as a secondary blowing agent, a halogenated hydrocarbon, a hydrocarbon, or an aliphatic alcohol containing from 1 to 4 carbon atoms, the secondary blowing agent having a normal atmospherpic boiling point of from about 0.degree. to about 100.degree. C. The composition may be expanded by steam immediately after extrusion foaming or may be expanded after aging of the composition which has been impregnated with volatile blowing agent.

公开(公告)号：US4581383A

公开(公告)日：1986-04-08

申请号：US773010

申请日：1985-09-06

申请人： Chung P. Park

发明人： Chung P. Park

IPC分类号： C08J9/00 ,  C08J9/14 ,  C08K5/54 ,  C08L23/02

CPC分类号： C08J9/149 ,  C08J9/0061 ,  C08J9/147 ,  C08K5/54 ,  C08L23/02 ,  C08L23/06 ,  C08J2323/02 ,  C08L2312/00

摘要： An expandable blend of a linear olefinic polymer and a crosslinkable polymer for production of lightly crosslinked foamed polymers and a process for the preparation thereof is provided. The presence of a crosslinkable polymer component in the blend increases the melt strength of the linear olefinic component so that conventional melt processing techniques may be utilized to produce foamed polymers. Both open and closed cell foams may be produced.

摘要翻译： 提供线性烯烃聚合物和用于生产轻链交联的发泡聚合物的可交联聚合物的可膨胀共混物及其制备方法。 共混物中可交联聚合物组分的存在增加了线性烯烃组分的熔体强度，使得可以利用常规的熔融加工技术来生产发泡聚合物。 可以生产开孔和闭孔泡沫。

公开(公告)号：US4226946A

公开(公告)日：1980-10-07

申请号：US14184

申请日：1979-02-22

申请人： Chung P. Park ,  Richard A. Bouton

发明人： Chung P. Park ,  Richard A. Bouton

IPC分类号： C08L23/00 ,  B29B7/00 ,  B29C47/00 ,  C08J9/00 ,  C08J9/12 ,  C08J9/14 ,  C08L101/00

CPC分类号： C08J9/0061 ,  C08J9/143 ,  C08J2323/06 ,  C08J2423/00

摘要： Low density foams from polyethylene blends having substantially closed cell structure and improved compressive strength are prepared using gel-forming extrusion technology. The polyethylene blend comprises from about 35 to about 60 weight percent of low density branched polyethylene in admixture with from about 40 to about 65 weight percent of intermediate density linear polyethylene. An exemplary blowing agent is 1,2-dichlorotetrafluoroethane, there being up to about 0.12 gram-mole of such blowing agent per 100 grams of resin blend in the flowable gel.

摘要翻译： 使用凝胶成型挤出技术制备具有基本上闭孔的结构和改进的抗压强度的聚乙烯共混物的低密度泡沫。 聚乙烯共混物包含约35至约60重量％的低密度支化聚乙烯与约40至约65重量％的中密度线性聚乙烯的混合物。 示例性的发泡剂是1,2-二氯四氟乙烷，可流动凝胶中每100克树脂共混物中含有高达约0.12克摩尔的这种发泡剂。

公开(公告)号：US4129530A

公开(公告)日：1978-12-12

申请号：US861938

申请日：1977-12-19

申请人： Chung P. Park ,  John M. Corbett ,  Warren H. Griffin

发明人： Chung P. Park ,  John M. Corbett ,  Warren H. Griffin

IPC分类号： C08J9/14

CPC分类号： C08J9/147 ,  C08J2323/02 ,  Y10S264/05

摘要： Low density, closed cell, soft foam products having dimensional stability are made from ethylenic resins having low stiffness, especially comprising copolymers consisting essentially of ethylene and monoethylenically unsaturated non-ionic comonomers, by release to lower pressure of a flowable, foamable gel under pressure, e.g., by extrusion foaming, wherein the gel comprises the ethylenic polymer and a volatile mixed blowing agent. The starting polymers are preferably copolymers of ethylene and vinyl acetate having stiffness less than about 20,000 psi. The mixed blowing agents are particularly characterized as mixtures of dichlorodifluoromethane and at least one fluorocarbon constituent A, as defined. Exemplary mixtures contain (I) dichlorodifluoromethane and (II) from 35 to 50 percent chloropentafluoroethane, octafluoropropane or octafluorocyclobutane based on the mixtures of I and II.

摘要翻译： 具有尺寸稳定性的低密度，闭孔，软泡沫产品由具有低刚度的乙烯树脂制成，特别是包括基本上由乙烯和单烯属不饱和非离子共聚单体组成的共聚物，通过在压力下释放到可流动的可发泡凝胶的较低压力下， 例如通过挤出发泡，其中凝胶包含乙烯类聚合物和挥发性混合发泡剂。 起始聚合物优选具有刚度小于约20,000psi的乙烯和乙酸乙烯酯的共聚物。 混合发泡剂特别表征为二氯二氟甲烷和至少一种氟碳成分A的混合物，如所定义。 基于I和II的混合物，示例性混合物含有（I）二氯二氟甲烷和（II）35-50％的氯五氟乙烷，八氟丙烷或八氟环丁烷。