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    Sizing hydrophobic fibers with acrylate polymers and gelatinized starch or graft copolymers thereof
    1.
    发明授权
    Sizing hydrophobic fibers with acrylate polymers and gelatinized starch or graft copolymers thereof 失效
    用丙烯酸酯聚合物和糊化淀粉或其接枝共聚物调整疏水性纤维

    公开(公告)号：US3061472A

    公开(公告)日：1962-10-30

    申请号：US1227060

    申请日：1960-03-02

    Applicant: STALEY MFG CO A E

    Inventor： BROCKWAY CHARLES E

    IPC: C08F251/00 ,  C08G18/10 ,  C08G18/48 ,  C08G18/84 ,  C08L3/02 ,  C08L71/02 ,  C09J103/02 ,  C09J133/08 ,  D06M15/11 ,  D06M15/267 ,  D06M15/564

    CPC classification number: D06M15/564 ,  C08F251/00 ,  C08G18/10 ,  C08G18/4833 ,  C08G18/84 ,  C08L3/02 ,  C08L71/02 ,  C08L2666/02 ,  C09J103/02 ,  C09J133/08 ,  D06M15/11 ,  D06M15/267 ,  Y10S8/04 ,  Y10S8/18 ,  Y10T428/2933 ,  Y10T442/3049 ,  Y10T442/3228 ,  C08F220/12 ,  C08G18/2805 ,  C08G18/2815 ,  C08G18/302

    Abstract: A sizing composition comprises either: (i) the product obtained by polymerizing a C2-C4 alkyl acrylate with a gelatinized starch in the presence of a free-radical catalyst; or (ii) a blend of an aqueous starch paste and an aqueous emulsion of a polymerized C2-C4 alkyl acrylate, the compositions in both cases containing a nonionic surface active agent in an amount up to 30% of the combined weight of starch and acrylic ester, the water-soluble portion of the agent being a polyoxyethylene of from 2 to 120 units, and the ratio of starch to acrylic ester lying in the range of 7:3 to 1:19. The polymerized acrylic ester may contain a comonomer such as acrylic, methacrylic or itaconic acid, maleic anhydride or acrylamide. The starch used may be a native starch or a modified starch, e.g. oxidized, acid-modified or etherified, or a dextrin. The free-radical catalyst may be hydrogen peroxide, benzoyl peroxide, t-butyl hydroperoxide, sodium hypochlorite, persulphates and redox systems. Preferred surface active agents are octylphenoxy, nonylphenoxy, dioctylphenoxy, tridecylphenoxy and lauryl ethers of polyoxyethylenes.ALSO:Hydrophobic fibres, e.g. polyester fibres, are sized by applying thereto a composition comprising either: (i) the product obtained by polymerizing a C2-C4 alkyl acrylate with a gelatinized starch in the presence of a freeradical catalyst; or (ii) a blend of an aqueous starch paste and an aqueous emulsion of a polymerized C2-C4 alkyl acrylate, the compositions in both cases containing a non-ionic surface active agent in an amount up to 30% of the combined weight of acrylic ester and starch, the water-soluble portion of the agent being a polyoxyethylene of from 2 to 120 units, and the ratio of starch to acrylic ester lying within the range of 7:3 to 1:19. The polymerized acrylic ester may contain a comonomer, e.g. acrylic, methacrylic or itaconic acid, maleic acrylic, aretharacrific or itaconic acid, maleic anhydride or acrylamide. The starch may be a native starch or a modified starch, e.g. oxidized, acid-modified or etherified, or a dextrin. Preferred surface active agents are octylphenoxy, dioctylphenoxy, nonylphenoxy, tridecylphenoxy and lauryl ethers of polyoxyethylenes.

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