Dihydroxy-pendant rigid-rod benzobisazole copolymer
    2.
    发明授权
    Dihydroxy-pendant rigid-rod benzobisazole copolymer 失效
    二羟基 - 侧链刚性棒苯并二唑共聚物

    公开(公告)号:US5136012A

    公开(公告)日:1992-08-04

    申请号:US709252

    申请日:1991-06-03

    IPC分类号: C08G73/18 C08G73/22 C08G75/32

    CPC分类号: C08G75/32 C08G73/18 C08G73/22

    摘要: There are provided novel rod-like heterocyclic aromatic copolymers having peating groups of the formula: ##STR1## wherein n has a value of 0.01 to 0.50, wherein Ar is a para-oriented aromatic group and Q is an aromatic heterocyclic group of the formula: ##STR2## wherein Y is --S--, --O-- or --NR--, wherein R is selected from the group consisting of --H, alkyl having 1 to 4 carbon atoms, and aromatic having 1 or 2 aromatic rings.

    摘要翻译: 提供了具有下式重复基团的新型棒状杂环芳族共聚物:其中n为0.01至0.50,其中Ar为对位取向芳族基团,Q为下式芳族杂环基: 其中Y是-S-,-O-或-NR-,其中R选自-H,具有1至4个碳原子的烷基和具有1或2个芳环的芳族。

    Dihydroxy-pendant rigid-rod benzobisazole copolymer
    4.
    发明授权
    Dihydroxy-pendant rigid-rod benzobisazole copolymer 失效
    二羟基 - 侧链刚性棒苯并二唑共聚物

    公开(公告)号:US5039778A

    公开(公告)日:1991-08-13

    申请号:US498256

    申请日:1990-03-23

    IPC分类号: C08G73/18 C08G73/22 C08G75/32

    CPC分类号: C08G75/32 C08G73/18 C08G73/22

    摘要: There are provided novel rod-like heterocyclic aromatic copolymers having repeating groups of the formula: ##STR1## wherein n has a value of 0.01 to 0.50, wherein Ar is a para-oriented aromatic group and Q is an aromatic heterocyclic group of the formula: ##STR2## wherein Y is --S--, --O-- or --NR--, wherein R is selected from the group consisting of --H, alkyl having 1 to 4 carbon atoms, and aromatic having 1 or 2 aromatic rings.

    摘要翻译: 提供了具有下式重复基团的新型棒状杂环芳族共聚物:其中n为0.01至0.50,其中Ar为对位取向芳族基团,Q为下式芳族杂环基: 其中Y是-S-,-O-或-NR-,其中R选自-H,具有1至4个碳原子的烷基和具有1或2个芳环的芳族。

    Melt stabilized polyketone blend containing a titanium alkoxide compound
    5.
    发明授权
    Melt stabilized polyketone blend containing a titanium alkoxide compound 失效
    熔融稳定的含有烷氧基钛化合物的聚酮共混物

    公开(公告)号:US5141979A

    公开(公告)日:1992-08-25

    申请号:US782186

    申请日:1991-10-24

    IPC分类号: C08K5/00

    CPC分类号: C08K5/0091

    摘要: A stabilized polymer composition comprising a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon, at least one melt stabilizing agent selected from the group consisting of titanium alkoxides. A process of preparing the composition and articles of manufacture produced from the composition are also disclosed.

    摘要翻译: 一种稳定的聚合物组合物,其包含一氧化碳和至少一种烯键式不饱和烃的线性交替聚合物,至少一种选自烷氧化钛的熔融稳定剂。 还公开了由组合物制备组合物和制品的方法。

    Fabrication of benzbisazole polymers into monolithic articles
    6.
    发明授权
    Fabrication of benzbisazole polymers into monolithic articles 失效
    苯并二唑聚合物制成单片制品

    公开(公告)号:US5326509A

    公开(公告)日:1994-07-05

    申请号:US134194

    申请日:1993-10-07

    摘要: A method for fabricating a monolithic polybenzbisazole article including the steps of:(a) dissolving at least one benzbisazole polymer in a strong acid at an elevated temperature;(b) transferring the resulting solution to a mold;(c) cooling the solution in the mold to a temperature below the gelation temperature of the acid-polymer mixture, thus providing a polymer-acid gel;(d) ageing the gel for about 0.25 to 10 days;(e) replacing the acid in the gel with water;(f) replacing the water in the gel with a lower aliphatic alcohol; and(g) densifying the gel.

    摘要翻译: 一种制造整体式聚苯并咪唑制品的方法,包括以下步骤:(a)在高温下将至少一种苯并咪唑聚合物溶解在强酸中; (b)将所得溶液转移到模具中; (c)将模具中的溶液冷却至低于酸 - 聚合物混合物的凝胶化温度的温度,从而提供聚合物 - 酸性凝胶; (d)将凝胶老化约0.25至10天; (e)用水代替凝胶中的酸; (f)用低级脂肪醇代替凝胶中的水; 和(g)使凝胶致密化。

    Process for recycling mixed polymer containing polyethylene terephthalate
    7.
    发明授权
    Process for recycling mixed polymer containing polyethylene terephthalate 失效
    回收含聚对苯二甲酸乙二醇酯的混合聚合物的方法

    公开(公告)号:US5554657A

    公开(公告)日:1996-09-10

    申请号:US436078

    申请日:1995-05-08

    摘要: The invention described herein provides a process for recycling a mixed polymer recycle stream containing polyester polymers, particularly polyethylene terephthalate (PET) typically in the form of carbonated soft drink or other containers. This novel process includes the steps of: (1) contacting the mixed polymer recycle stream with a solvent which selectively dissolves the PET. (2) separating the selective solvent containing PET from the residual mixed polymer, (3) cooling the selective solvent to precipitate the PET, and (4) removing the selective solvent from the precipitated PET. It is preferable that the mixed polymer recycle stream be prepared for recycling by conventional steps, such as water washing. In a preferred embodiment, the mixed polymer recycle stream is chemically washed subsequent to water washing and prior to contact with the selective solvent. The PET recovered is preferably combined with "virgin" PET and further processed to increase its molecular weight.

    摘要翻译: 本文描述的本发明提供了一种用于再循环含有聚酯聚合物,特别是通常为碳酸软饮料或其它容器形式的聚对苯二甲酸乙二醇酯(PET)的混合聚合物再循环料流的方法。 该新方法包括以下步骤:(1)使混合的聚合物再循环流与选择性溶解PET的溶剂接触。 (2)从残留混合聚合物中分离含有选择性溶剂的PET,(3)冷却选择性溶剂使PET沉淀,(4)从析出的PET中除去选择性溶剂。 优选混合聚合物再循环流通过常规步骤如水洗来制备用于再循环。 在优选的实施方案中,混合聚合物再循环料流在水洗后和与选择性溶剂接触之前进行化学洗涤。 回收的PET优选与“原始”PET组合并进一步加工以增加其分子量。