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    • 1. 发明授权
    • Modified polyacetal and method of producing the same
    • 改性聚缩醛及其制备方法
    • US5973081A
    • 1999-10-26
    • US663279
    • 1996-06-07
    • Hiroyuki KanaiHajime SerizawaKatsuhei OhnishiEiji MasudaKaoru Yamamoto
    • Hiroyuki KanaiHajime SerizawaKatsuhei OhnishiEiji MasudaKaoru Yamamoto
    • C08F283/06C08F290/14C08G2/30C08L61/02C08L67/00C08L75/04C08L77/00
    • C08F290/142C08F283/06C08G2/30
    • A modified polyacetal is obtainable by heating 0.1 to 30 parts by weight of (B) a polymerizable compound having a modifying group such as an epoxy group, a carboxyl group or an acid anhydride group relative to 100 parts by weight of (A) a base polyacetal and introducing the modifying group of the polymerizable compound to the base polyacetal. The base polyacetal (A) includes (A1) a polyacetal selected from polyoxymethylene homopolymers and copolymers, and (A2) a polymerizable polyacetal having a functional group comprising a polymerizablly unsaturated bond. The introduction efficiency of the modifying group can be enhanced by adding 0.01 to 2.5 parts by weight of (C) a free-radical initiator relative to 100 parts by weight of the total amount of the components (A) and (B), and mixing the resultant mixture under a molten state of the polyacetal. According to such method, the affinity of the polyacetal is improved by introducing the modifying group to the base polyacetal with ease and high efficiency.
    • PCT No.PCT / JP95 / 02138 Sec。 371日期1996年6月7日第 102(e)日期1996年6月7日PCT提交1995年10月19日PCT公布。 第WO96 / 13535号公报 日期:1996年5月9日改性聚缩醛相对于100重量份的(B)具有环氧基,羧基或酸酐基等改性基团的聚合性化合物,加热0.1〜30重量份, A)基础聚缩醛,并将可聚合化合物的改性基团引入到基础聚缩醛中。 基础聚缩醛(A)包括(A1)选自聚甲醛均聚物和共聚物的聚缩醛,(A2)具有包含可聚合不饱和键的官能团的聚合性缩醛。 相对于100重量份的组分(A)和(B)的总量,通过加入0.01至2.5重量份的(C)自由基引发剂可以提高改性基团的引入效率,并且混合 所得混合物在聚缩醛的熔融状态下。 根据这种方法,通过将改性基团容易且高效率地引入到基础聚缩醛中来改善聚缩醛的亲和性。
    • 2. 发明授权
    • Process for preparing polyacetal copolymer
    • 制备聚缩醛共聚物的方法
    • US5866670A
    • 1999-02-02
    • US698190
    • 1996-08-15
    • Akira NakaiKaoru YamamotoEiji MasudaHiroyuki Kanai
    • Akira NakaiKaoru YamamotoEiji MasudaHiroyuki Kanai
    • C08G2/06C08G4/00
    • C08G2/06
    • A process for producing a polyacetal copolymer, which is extremely heat-stable and is extremely reduced in the quantity of unstable terminals even in a high polymerization yield in which trioxane as the principal monomer, comprises copolymerization of trioxane as the principal monomer with a cyclic ether or cyclic formal having at least one carbon-to-carbon bond as the comonomer by using a specific heteropoly-acid or acid salt thereof as a polymerization catalyst until the content of the remaining monomers is lowered to at most 10% by weight based on all the monomers fed, adding 0.01 to 10% by weight, based on the resulting crude polymer, of a solution containing a catalyst deactivator, or contacting a basic gas as the deactivator to deactivate the catalyst, and subjecting the crude polymer as such to heat melting treatment without washing thereof.
    • 即使在作为主要单体的三恶烷的高聚合产率下,也包含三恶烷作为主要单体与环状醚的共聚,该聚缩醛共聚物的制造方法是非常热稳定且极不稳定的终端量极少的方法 或具有至少一个碳 - 碳键作为共聚单体的环状缩甲醛,通过使用其特定的杂多酸或其酸盐作为聚合催化剂,直到剩余单体的含量基于所有物质降至至多10重量% 单体进料,基于所得粗聚合物添加0.01至10重量%的含有催化剂失活剂的溶液,或使碱性气体作为钝化剂使其失活,并使粗聚合物如此加热熔化 处理而不洗涤。
    • 7. 发明授权
    • Process for preparing polyacetal copolymer
    • 制备聚缩醛共聚物的方法
    • US5844059A
    • 1998-12-01
    • US791469
    • 1997-01-27
    • Kaoru YamamotoHiroyuki Kanai
    • Kaoru YamamotoHiroyuki Kanai
    • C08G2/06C08G2/10C08G2/18C08G2/28C08G6/00C08G2/00
    • C08G2/18C08G2/06C08G2/10C08G2/28
    • To prepare a thermally very stable polyacetal copolymer containing a very small amount of unstable parts in a high yield according to a simple process wherein an isopolyacid or an acid salt thereof is used as the polymerization catalyst in the copolymerization of trioxane as the principal monomer with a comonomer copolymerizable therewith, and wherein deactivation of the catalyst can be effected simply without fail through contact with a basic gas after polymerization without the necessity for any washing step. In the preparation of a polyacetal copolymer by the copolymerization of trioxane as the principal monomer with a cyclic ether or cyclic formal having at least one carbon--carbon bond as a comonomer, the copolymerization is effected using an isopolyacid or an acid salt thereof as the polymerization catalyst, followed by contact with a basic gas as a deactivator to deactivate the catalyst, and subsequent heat-melting treatment of the resulting crude polymer intact without washing thereof.
    • 为了制备含有非常少量的不稳定部分的热非常稳定的聚缩醛共聚物,根据简单的方法,其中在三恶烷作为主要单体的共聚合中使用异多酸或其酸盐作为聚合催化剂, 可与其共聚的共聚单体,并且其中催化剂的失活可以通过在聚合后与碱性气体接触而简单地进行,而不需要任何洗涤步骤。 在通过三恶烷作为主要单体与具有至少一个碳 - 碳键作为共聚单体的环状醚或环状缩甲醛进行共聚制备聚缩醛共聚物时,使用等多酸或其酸性盐作为聚合反应进行共聚 催化剂,然后与作为失活剂的碱性气体接触以使催化剂失活,随后对所得粗聚合物进行热熔融处理而不洗涤。