Two-stage oxidation of polyarylene sulfides
    2.
    发明授权
    Two-stage oxidation of polyarylene sulfides 失效
    聚亚芳基硫化物的两段氧化

    公开(公告)号:US5496917A

    公开(公告)日:1996-03-05

    申请号:US237271

    申请日:1994-05-03

    摘要: Polyarylene thioethers having recurring units of the formula[--(S--E--).sub.a --(--SO--E--).sub.b --(SO.sub.2 --E).sub.c --](I)in which E are, independently of one another, phenylene, naphthylene or biphenylene, a and c have, independently of one another, values from 0 to less than 1 and b has values from greater than zero to less than 1, with the proviso that the sum of a+b+c is equal to 1 and at least two of the indices are greater than zero, are obtained by oxidation of polyarylene sulfides in two stages, wherein in the first stage a polymer in solid form in a suspension medium is oxidized with ozone and the reaction product obtained is in the second stage reacted in acetic acid with hydrogen peroxide in the presence of catalytic amounts of concentrated sulfuric acid and/or with addition of equilibrium per-acids. The polyarylene thioethers are suitable for the production of molded parts having high temperature resistance and high resistance to chemicals.

    摘要翻译: 具有式[ - (SE-)a - ( - SO-E-)b-(SO2-E)c - ](I)重复单元的聚亚芳基硫醚,其中E彼此独立地为亚苯基,亚萘基或亚苯基 亚联苯,a和c彼此独立地具有0至小于1的值,b具有大于0至小于1的值,条件是a + b + c的和等于1且在 指标中的至少两个大于零,是通过两段式聚亚芳基硫化物的氧化获得的,其中在第一阶段中,悬浮介质中固体形式的聚合物被臭氧氧化,并且所得反应产物在第二阶段中反应 在乙酸中与过氧化氢在催化量的浓硫酸存在下和/或加入平衡过酸。 聚亚芳基硫醚适用于生产具有耐高温性和高耐化学性的成型部件。

    Filter material and process for removing ozone from gases and liquids
    4.
    发明授权
    Filter material and process for removing ozone from gases and liquids 失效
    用于从气体和液体中去除臭氧的过滤材料和工艺

    公开(公告)号:US5423902A

    公开(公告)日:1995-06-13

    申请号:US110586

    申请日:1993-08-23

    摘要: A filter material based on a polyarylene thioether having repeating units of the formula--[(Ar.sup.1).sub.n --X)].sub.m --[(Ar.sup.2).sub.i --Y)].sub.j --[(Ar.sup.3).sub.k --Z)].sub.l --[(Ar.sup.4).sub.o --W)].sub.p --(I)in which Ar.sup.1, Ar.sup.2, Ar.sup.3, Ar.sup.4, W, X, Y and Z, independently of each other, are identical or different, the indices n, m, i, j, k, l, o and p, independently of each other, are zero or integers 1, 2, 3 or 4, their sum being at least 2, Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.4 are arylene systems having 6 to 18 carbon atoms, and W, X, Y and Z are divalent linking groups, selected from --SO.sub.2 --, --S--, --SO--, --CO--, --O--, --CO.sub.2 --, or alkylene groups or alkylidene groups having 1 to 6 carbon atoms is suitable for removing ozone from gases or liquids. The removal proceeds quantitatively, no volatile products being formed.

    摘要翻译: 基于具有式[[(Ar 1)n X)] m - [(Ar 2)i Y)] j - [(Ar 3)k Z)] - [(Ar 4)o W)] p]的重复单元的聚芳硫醚的过滤材料 - (I)其中Ar1,Ar2,Ar3,Ar4,W,X,Y和Z彼此独立地相同或不同,指数n,m,i,j,k,l,o和p, 彼此独立,为零或整数1,2,3或4,它们的和为至少2,Ar 1,Ar 2,Ar 3和Ar 4为具有6至18个碳原子的亚芳基体系,W,X,Y和Z分别为 选自-SO 2 - , - S - , - SO - , - CO - , - O - , - CO 2 - 或具有1至6个碳原子的亚烷基或亚烷基的二价连接基团适用于从气体或 液体。 清除量定量进行,不形成挥发性物质。

    Oxidized polyarylene sulfides
    5.
    发明授权
    Oxidized polyarylene sulfides 失效
    氧化聚亚芳基硫化物

    公开(公告)号:US6020442A

    公开(公告)日:2000-02-01

    申请号:US585267

    申请日:1996-01-11

    摘要: Oxidation product of polyarylene sulfides comprising recurring units of the formula.brket open-st.C.sub.6 H.sub.4 --S.brket close-st. (I)in the form of a compound comprising recurring units of the formula.brket open-st..paren open-st.C.sub.6 H.sub.4 --S.paren close-st..sub.a .paren open-st.C.sub.6 H.sub.4 --SO.paren close-st..sub.b .brket close-st.(II)in which the sulfur/oxygen ratio is from 1:0.1 to 1:1, the sum of a and b always being 1 and a and b each being greater than zero or with the proviso that a is zero if b is 1.

    摘要翻译: 包含式+ 547 C6H4-S + 548(I)的重复单元的聚亚芳基硫化物的氧化产物为包含式+ 547 +545 C6H4-S + 546a + 545C6H4-SO + 546的重复单元的化合物形式 b + 548(II),其中硫/氧比为1:0.1至1:1,a和b之和始终为1,a和b各自大于零,或者条件是a为0,如果 b为1。

    Ter material and process for removing ozone from gases and liquids
    6.
    发明授权
    Ter material and process for removing ozone from gases and liquids 失效
    用于从气体和液体中除去臭氧的绝缘材料和工艺

    公开(公告)号:US5593594A

    公开(公告)日:1997-01-14

    申请号:US396475

    申请日:1995-03-02

    摘要: A filter material based on a polyarylene thioether having repeating units of the formula--[(Ar.sup.1).sub.n --X)].sub.m --[(Ar.sup.2).sub.i --Y)].sub.j --[(Ar.sup.3).sub.k --Z)].sub.1 --[(Ar.sup.4).sub.o --W)].sub.p --(I)in which Ar.sup.1, Ar.sup.2, Ar.sup.3, Ar.sup.4, W, X, Y and Z, independently of each other, are identical or different, the indices n, m, i, j, k, l, o and p, independently of each other, are zero or integers 1, 2, 3 or 4, their sum being at least 2, Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.4 are arylene systems having 6 to 18 carbon atoms, and W, X, Y and Z are divalent linking groups, selected from --SO.sub.2 --, --S--, --SO--, --CO--, --O--, --CO.sub.2 --, or alkylene groups or alkylidene groups having 1 to 6 carbon atoms is suitable for removing ozone from gases or liquids. The removal proceeds quantitatively, no volatile products being formed.

    摘要翻译: 基于具有式[[(Ar1)nX)] m - [(Ar2)iY)] j - [(Ar3)kZ)] 1 - [(Ar4)oW)] p]的重复单元的聚芳硫醚的过滤材料 - (I)其中Ar1,Ar2,Ar3,Ar4,W,X,Y和Z彼此独立地相同或不同,指数n,m,i,j,k,l,o和p, 彼此独立,为零或整数1,2,3或4,它们的和为至少2,Ar 1,Ar 2,Ar 3和Ar 4为具有6至18个碳原子的亚芳基体系,W,X,Y和Z分别为 选自-SO 2 - , - S - , - SO - , - CO - , - O - , - CO 2 - 或具有1至6个碳原子的亚烷基或亚烷基的二价连接基团适用于从气体或 液体。 清除量定量进行,不形成挥发性物质。

    Process for the preparation of polyacetal copolymers
    9.
    发明授权
    Process for the preparation of polyacetal copolymers 失效
    制备聚缩醛共聚物的方法

    公开(公告)号:US5587449A

    公开(公告)日:1996-12-24

    申请号:US521998

    申请日:1995-08-31

    CPC分类号: C08G2/24 C08G2/00 C08G2/28

    摘要: In the process for the preparation, with simultaneous end group stabilization, of polyacetal copolymers in a homogeneous phase and working up thereof, cyclic formaldehyde oligomers are copolymerized with cyclic acetals in the presence of an initiator in a polymerization reactor and immediately thereafter the initiator is deactivated by addition of basic substances, the unstable chain ends being degraded down to 0.01% to 1% in the presence of residual monomer, the product losing the majority of the residual monomer at the reactor outlet by letting down into a pelletizing device and the residual monomer which remains and the impurities dissolved in the product being removed by extraction with solvents and the product being pelletized, after drying and stabilization.

    摘要翻译: 在制备方法中,同时进行端基稳定化,聚缩醛共聚物在均相和加工中,环状甲醛低聚物在聚合反应器中在引发剂存在下与环状缩醛共聚,此后引发剂失活 通过添加碱性物质,在残留单体存在下,不稳定的链末端降解至0.01%至1%,产物通过放入造粒装置而丢失大部分残留单体,并将剩余的单体 其残留并且溶解在产物中的杂质通过用溶剂萃取除去,产物在干燥和稳定后被造粒。

    Method of blow or extrusion molding polyoxymethylene resin
    10.
    发明授权
    Method of blow or extrusion molding polyoxymethylene resin 失效
    吹塑或挤压成型聚甲醛树脂的方法

    公开(公告)号:US5458839A

    公开(公告)日:1995-10-17

    申请号:US51903

    申请日:1993-04-27

    摘要: A process for efficiently producing a hollow molding or a sheet- or rod-shaped molding includes subjecting a composition containing a polyoxymethylene copolymer resin having substantially a linear molecular structure and a melt flow index (MI) value (190.degree. C., 2160 g load) of 0.1 to 2.0 g/10 min to blow -molding or extrusion-molding operations. The preferred polyoxymethylene copolymer is prepared by copolymerizing trioxane as the principle monomer with a cyclic ether or cyclic formal comonomer in the presence of 1.times.10.sup.-3 to 1.times.10.sup.-2 molar % of a boron trifluoride catalyst or a coordination compound thereof, while regulating the chain-terminating or chain-transferring impurities in the reaction system to 1.times.10.sup.-2 molar % or less, and then cooling the product obtained to a temperature of 45.degree. or below within 30 seconds so as to deactivate the catalyst.

    摘要翻译: 一种用于有效地生产中空成型或片状或棒状成型的方法包括使含有基本上具有线性分子结构和熔体流动指数(MI)值(190℃,2160g载荷)的聚甲醛共聚物树脂 )为0.1〜2.0g / 10分钟,以进行吹塑或挤出成型操作。 优选的聚甲醛共聚物通过在1×10 -3至1×10 -2摩尔%的三氟化硼催化剂或其配位化合物的存在下,将三恶烷作为主要单体与环醚或环状形式共聚单体共聚而制备, 将反应体系中的杂质终止或链转移至1×10 -2摩尔%以下,然后在30秒内将得到的产物冷却至45℃以下,使催化剂失活。