Optical fibres based on polycarbonate fibres, and a process for the
production thereof
    6.
    发明授权
    Optical fibres based on polycarbonate fibres, and a process for the production thereof 失效
    基于聚碳酸酯纤维的光纤及其制造方法

    公开(公告)号:US4919514A

    公开(公告)日:1990-04-24

    申请号:US294079

    申请日:1989-01-05

    摘要: A process for the production of optical fibers based on aromatic polycarbonates wherein the polycarbonate fibres are coated with a plastic, the improvement which comprises(a) to coat the fiber with an UV irradiation-polymerizable mixture which comprises(A) 25 to 75% by weight, based on the total weight of the polymerizable compounds, of a polyfunctional (meth)acrylic acid derivative of the formula ##STR1## (B) 75 to 25% by weight, based on the total weight of the polymerizable compounds, of a monofunctional (meth)acrylate of the formula ##STR2## (C) 0.1 to 10% by weight, based on the total weight of the polymerizable compounds, of a photoinitiator, and(b) to polymerize this mixture on the fibre by UV irradiation.

    摘要翻译: 一种用于生产基于芳族聚碳酸酯的光纤的方法,其中聚碳酸酯纤维用塑料涂覆,其改进包括(a)用UV辐射可聚合混合物涂覆纤维,所述混合物包含(A)25至75% 基于可聚合化合物的总重量,基于总重量的75至25重量%的式(I)+ TR(IMA)(B)的多官能(甲基)丙烯酸衍生物 的可聚合化合物,式(III)(C)的单官能(甲基)丙烯酸酯占基于可聚合化合物的总重量的0.1至10重量%的光引发剂,和(b)至 通过紫外线照射在纤维上聚合该混合物。

    Recyclable thermoplastics foam of high glass temperature
    9.
    发明授权
    Recyclable thermoplastics foam of high glass temperature 失效
    可回收的热塑性塑料泡沫玻璃温度高

    公开(公告)号:US5300543A

    公开(公告)日:1994-04-05

    申请号:US127724

    申请日:1993-09-28

    CPC分类号: C08J9/12

    摘要: A thermoplastic molding composition suitable for the preparation of foam is disclosed. The composition comprises a thermoplastic resinous component and a foaming agent which includes A) (i) 0.01 to 4.8% alumina hydrate (aluminum hydroxide) in combination with (ii) 0.01 to 4.8% of an acidic additive or B) 0.01 to 4.8% of the reaction product of said (i) and said (ii), the percentages being relative to the weight of the composition to be foamed. The invention is based on the finding that the foaming of the composition does not lead to any significant reduction in molecular weight of the resinous component or to troublesome discoloration of the foam, even during its re-extrusion.

    摘要翻译: 公开了一种适于制备泡沫的热塑性模塑组合物。 该组合物包含热塑性树脂组分和发泡剂,其包括A)(i)0.01至4.8%的氧化铝水合物(氢氧化铝)与(ii)0.01至4.8%的酸性添加剂的组合,或B)0.01至4.8%的 所述(i)和所述(ii)的反应产物的百分比相对于要发泡的组合物的重量。 本发明基于以下发现:组合物的发泡不会导致树脂组分的分子量的任何显着降低,或者即使在其再挤出期间泡沫的麻烦变色。