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    • 1. 发明申请
    • POLYMERS FOR CONTACT LENSES
    • 聚合物用于接触镜片
    • WO2011055110A8
    • 2012-05-31
    • PCT/GB2010002026
    • 2010-11-02
    • OCUTEC LTDRASHID ABDULBOWERS RODERICK WILLIAM JONATHANTIPTON WADEGRAHAM NEIL BONNETTE
    • RASHID ABDULBOWERS RODERICK WILLIAM JONATHANTIPTON WADEGRAHAM NEIL BONNETTE
    • C08G18/48C08G18/66G02B1/04
    • C08G18/4833C08G18/6674C08G2220/00G02B1/043C08L75/08
    • The present invention relates to a thermoplastic polyurethane contact lens prepared from a mixture comprising: (a) at least one polyethylene glycol; (b) at least one di-isocyanate; and (c) at least one diol of formula (I): wherein n is an integer from 1 to 25; wherein the polyethylene glycol, di-isocyanate and diol are reacted under substantially anhydrous conditions. Further aspects of the invention relate to a process for preparing a contact lens. The invention also relates to a process for preparing a polyurethane xerogel in the form of a molded article, said process comprising the steps of: (i) preparing a reaction mixture comprising at least one polyethylene glycol, at least one di-isocyanate and at least one diol of formula I as described above; (ii) reacting the reaction mixture formed in step (i) under substantially anhydrous conditions to form a polyurethane xerogel; (iii) injection molding the polyurethane xerogel to form a molded article, (iv) hydrating the xerogel molded article to form a contact lens.
    • 本发明涉及由以下混合物制备的热塑性聚氨酯隐形眼镜:(a)至少一种聚乙二醇; (b)至少一种二异氰酸酯; 和(c)至少一种式(I)的二醇:其中n是1至25的整数; 其中聚乙二醇,二异氰酸酯和二醇在基本无水条件下反应。 本发明的其它方面涉及一种制备隐形眼镜的方法。 本发明还涉及一种制备模制品形式的聚氨酯干凝胶的方法,所述方法包括以下步骤:(i)制备包含至少一种聚乙二醇,至少一种二异氰酸酯和至少一种二异氰酸酯的反应混合物 如上所述的一种式I的二醇; (ii)在基本上无水条件下使步骤(i)中形成的反应混合物反应形成聚氨酯干凝胶; (iii)注射成型聚氨酯干凝胶以形成模塑制品,(iv)将干凝胶模塑制品保湿以形成隐形眼镜。
    • 2. 发明申请
    • POLYMERS FOR CONTACT LENSES
    • 用于隐形眼镜的聚合物
    • WO2011051689A3
    • 2011-06-23
    • PCT/GB2010002018
    • 2010-11-02
    • OCUTEC LTDRASHID ABDULBOWERS RODERICK WILLIAM JONATHANTIPTON WADEGRAHAM NEIL BONNETTE
    • RASHID ABDULBOWERS RODERICK WILLIAM JONATHANTIPTON WADEGRAHAM NEIL BONNETTE
    • C08G18/48C08G18/61C08K5/00G02B1/04
    • C08G71/04C08G18/4825C08G18/4829C08G18/4833C08G18/61C08G2101/0091C08G2210/00G02B1/043C08L69/00
    • The present invention relates to a polyurethane polymer composition comprising polyethyleneglycol dialkyl ether. There is also provided a process for preparing a polyurethane. The invention also relates to a process for preparing a polyurethane xerogel in the form of a molded article, said process comprising the steps of: i. preparing a mixture of a. at least one polyethylene glycol or at least one polyol of formula (I), wherein at least three Of X1, X2, X3, X4 and X5 are each independently an OH-terminated group, and the remainder of X1, X2, X3, X4 and X5 are each independently H or absent, and Z is a central linking unit, a. at least one di- or poly-isocyanate, b. optionally at least one OH-terminated chain extender, and c. at least one polyethyleneglycol dialkyl ether; ii. dispensing the reaction mixture formed in step i) into a mold; iii. allowing the reaction mixture to react and cure; iv. removing the molded article from the mold; and v. hydrating the molded article.
    • 本发明涉及包含聚乙二醇二烷基醚的聚氨酯聚合物组合物。 还提供了一种制备聚氨酯的方法。 本发明还涉及制备模制品形式的聚氨酯干凝胶的方法,所述方法包括以下步骤:i。 准备一种混合物。 至少一种聚乙二醇或至少一种式(I)的多元醇,其中X 1,X 2,X 3,X 4和X 5中的至少三个各自独立地为OH-封端的基团,且X 1,X 2,X 3,X 4的剩余部分 和X 5各自独立地为H或不存在,且Z为中心连接单元,a。 至少一种二异氰酸酯或多异氰酸酯,b。 任选至少一种OH-封端的增链剂,和c。 至少一种聚乙二醇二烷基醚; II。 将步骤i)中形成的反应混合物分配到模具中; III。 使反应混合物反应并固化; IV。 从模具中取出模制品; 和v。使模制品水合。