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    Method of preparing polyethylene foam
    2.
    发明授权
    Method of preparing polyethylene foam 失效
    制备聚乙烯泡沫的方法

    公开(公告)号：US3892690A

    公开(公告)日：1975-07-01

    申请号：US26586572

    申请日：1972-06-23

    Applicant: CITIES SERVICE CO

    Inventor： SETTERSTROM CARL A

    IPC: C08J9/14 ,  C08F47/10 ,  C08F3/04

    CPC classification number: C08J9/141 ,  B29C44/505 ,  B29K2023/06 ,  C08J2323/06 ,  Y10S264/05

    Abstract: A method of manufacturing a foamed polyethylene material is disclosed herein, wherein the polyethylene-ethylene product stream from a high pressure polymerization reactor is introduced to an extruder after an intermediate pressure reduction and preferably extruded through a die at a pressure differential of from about 150 to 1,200 psi and preferably 200 to 750 psi. The polyethylene stream to the extruder comprises about 0.1% to 5% wt. ethylene, which acts as a foaming agent during the extrusion.

    Abstract translation: 本文公开了一种制造泡沫聚乙烯材料的方法，其中来自高压聚合反应器的聚乙烯 - 乙烯产物流在中间压力降低之后被引入挤出机中，并且优选通过模头以约150至 1200psi，优选200-750psi。 挤出机的聚乙烯流包含约0.1％至5％ 乙烯，其在挤出期间起发泡剂的作用。

    Rigid polyethylene foam
    3.
    发明授权
    Rigid polyethylene foam 失效
    刚性聚乙烯泡沫

    公开(公告)号：US3856717A

    公开(公告)日：1974-12-24

    申请号：US37358673

    申请日：1973-06-25

    Applicant: GULF RESEARCH DEVELOPMENT CO

    Inventor： THEARD L ,  PETERSON F ,  RUSSELL J ,  REIERSON R

    IPC: C08J9/14 ,  C08F47/10 ,  C08J1/26

    CPC classification number: C08J9/141 ,  C08J9/14 ,  C08J2323/00 ,  C08J2323/06

    Abstract: Rigid polyethylene foams are prepared by heating a mixture of a linear polyethylene and a hydrocarbon boiling below 30* C. in a closed reaction zone to at least the critical temperature of the hydrocarbon in the absence of stirring, and therafter venting the hydrocarbon at a temperature above or below the melting point of the polyethylene.

    Abstract translation: 刚性聚乙烯泡沫通过将线性聚乙烯和沸点低于30℃的烃混合物在封闭的反应区中加热至至少在不搅拌下的烃的临界温度下制备，然后在温度下排出烃 高于或低于聚乙烯的熔点。

    Low density polystyrene pearls and methods of making them
    5.
    发明授权
    Low density polystyrene pearls and methods of making them 失效
    低密度聚苯乙烯珍珠及其制备方法

    公开(公告)号：US3723362A

    公开(公告)日：1973-03-27

    申请号：US3723362D

    申请日：1968-10-21

    Applicant: SAINT GOBAIN

    Inventor： BATTIGELLI J

    IPC: B29C44/34 ,  C08J9/228 ,  C08F33/02 ,  C08F47/10

    CPC classification number: C08J9/228 ,  B29C44/3461 ,  C08J2325/00 ,  Y10S264/09

    Abstract: POLYSTYRENE PEARLS ARE MADE BY INSUFFLATING POLYSTYRENE PARTICLES CONTAINING EXPANSION AGENT BY HOT AIR FOLLOWED BY BRIEF INSUFFLATION BY SUPERHEATED STREAM. A FURTHER ADVANTAGE CAN BE OBTAINED BY SUBJECTING THESE EXPANDED PEARLS TO HEAT TREATMENT IN AN AUTOCLAVE. THE SUCCESSIVE TREATMENTS BY HOT AIR AND STREAM ARE AT ATMOSPHERIC PRESSURE AND AT TEMPERATURE WHICH ARE ADEQUATE TO SOFTEN THE POLYSTYRENE AND ACTIVATE THE EXPANSION AGENT. PRODUCTS CAN BE PRODUCED WHICH HAVE ANY CHOSEN DENSITY FROM 2.5 KG./M3. UPWARD. PRODUCTS OF LOWEST DENSITIES ARE UNIQUE.

    Cell stabilizer for vinyl resin foams
    6.
    发明授权
    Cell stabilizer for vinyl resin foams 失效
    用于乙烯树脂的细胞稳定剂

    公开(公告)号：US3717595A

    公开(公告)日：1973-02-20

    申请号：US9285070

    申请日：1970-11-25

    Applicant: AIR PROD & CHEM

    Inventor： HUNTZINGER E ,  SCHWARTZ N

    IPC: C08F20060101 ,  C08J9/00 ,  C08F47/10 ,  C08F29/24

    CPC classification number: C08J9/0061 ,  C08J2327/00 ,  C08J2327/06 ,  C08J2433/00 ,  Y10S521/908 ,  C08L27/06 ,  C08L33/10

    Abstract: Production of cellular vinyl foams having desirably low density, good physical characteristics, fine uniform cell structure and the capability for production with short cycle times is achieved by incorporating a new cell stabilizer additive in a foamable precursor composition, such as a plastisol comprising a vinyl resin, plasticizer and blowing agent. The cell stabilizer additive is one or more of the copolymers obtained by the copolymerization of (A) a monomeric C2 to C6 methacrylate and (B) a nitrogen-containing, ethylenically unsaturated monomer in an amount providing nitrogen in the copolymerizate in the range of 0.1 to 10 percent by weight.

    Abstract translation: 通过在可发泡的前体组合物中引入新的细胞稳定剂添加剂，例如包含乙烯基树脂的增塑溶胶来生产具有期望的低密度，良好的物理特性，细小的均匀的细胞结构和具有短的循环时间的生产能力的细胞乙烯基泡沫体 ，增塑剂和发泡剂。 电池稳定剂添加剂是通过（A）单体C 2至C 6甲基丙烯酸酯和（B）含氮的烯属不饱和单体共聚得到的共聚物中得到的一种或多种共聚物，其量为0.1 至10重量％。

    Method for producing foamed article from polypropylene
    7.
    发明授权
    Method for producing foamed article from polypropylene 失效
    从聚丙烯生产泡沫制品的方法

    公开(公告)号：US3714083A

    公开(公告)日：1973-01-30

    申请号：US3714083D

    申请日：1969-01-13

    Applicant: MITSUBISHI PETROCHEMICAL CO

    Inventor： NAKAYAMA Y ,  FUKADA T ,  OGAWA M

    IPC: C08F255/02 ,  C08J9/10 ,  C08F47/10 ,  C08F1/16 ,  C08F19/20

    CPC classification number: C08F255/02 ,  C08J9/10 ,  Y10S521/915

    Abstract: A method of producing a foamed article having a uniform cellular structure using a modified polypropylene produced by irradiating polypropylene with an ionizing radiation of from 0.1 to 5.0 megarad and graft-copolymerizing the irradiated polypropylene with from 0.5 - 6 percent by weight divinyl benzene or with from 0.5 - 6 percent by weight of divinyl benzene and not more than 10 percent by weight of an acrylic acid ester.

    Abstract translation: 使用改性聚丙烯制造具有均匀多孔结构的发泡制品的方法，所述改性聚丙烯通过用0.1至5.0兆拉德的电离辐射照射聚丙烯，并将经辐射的聚丙烯与0.5-6重量％的二乙烯基苯接触共聚， 0.5-6重量％的二乙烯基苯和不超过10重量％的丙烯酸酯。

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