Methacrylate resin blends
    1.
    发明授权
    Methacrylate resin blends 失效
    甲基丙烯酸酯树脂混合物

    公开(公告)号:US5777034A

    公开(公告)日:1998-07-07

    申请号:US745393

    申请日:1996-11-08

    摘要: The invention encompasses a new methacrylate resin blend composition, and a method of making the blend composition, having improved solvent craze resistance. The new blend composition contains a methacrylate matrix resin, particles of a single layer polymer, and, optionally, an acrylic multi-layer polymer. Particles of the single layer polymer derived from 50% or more methyl methacrylate, and having weight average molecular weight (Mw) at least 120% of the Mw of the methacrylate matrix resin component of the blend, the particles having a diameter of from 50 to 500 nanometers, have been discovered to confer a solvent craze resistance value to the methacrylate resin blend which is at least twice the solvent craze resistance value of the methacrylate resin absent particles of the single layer polymer. Solvent craze resistance of the blend may be improved by as much as 10-fold or more over the solvent craze resistance of the methacrylate matrix resin alone.

    摘要翻译: 本发明包括新的甲基丙烯酸酯树脂共混物组合物,以及制备该共混组合物的方法,具有改进的耐溶剂耐热性。 新的共混组合物包含甲基丙烯酸酯基质树脂,单层聚合物的颗粒和任选的丙烯酸多层聚合物。 衍生自50%或更多甲基丙烯酸甲酯的单层聚合物的颗粒,其重均分子量(Mw)为共混物的甲基丙烯酸酯基树脂组分的Mw的至少120%,颗粒的直径为50至 已经发现500纳米的甲基丙烯酸酯树脂共混物的溶剂耐热性值是甲基丙烯酸酯树脂不含单层聚合物颗粒的溶剂耐热性的至少两倍。 混合物的溶剂耐热性可以比单独的甲基丙烯酸酯基体树脂的溶剂耐热性提高多达10倍或更多。

    Oxidation of alkanes to unsaturated aldehydes and carboxylic acids using a catalyst containing Mo, V, Te and Nb
    3.
    发明授权
    Oxidation of alkanes to unsaturated aldehydes and carboxylic acids using a catalyst containing Mo, V, Te and Nb 有权
    使用含有Mo,V,Te和Nb的催化剂将烷烃氧化成不饱和醛和羧酸

    公开(公告)号:US06180825B2

    公开(公告)日:2001-01-30

    申请号:US09316007

    申请日:1999-05-21

    IPC分类号: C07C5116

    摘要: A process for preparing a catalyst comprises: admixing metal compounds, at least one of which is an oxygen containing compound, and at least one solvent to form a solution; removing the solvent from the solution to obtain a catalyst precursor; and calcining the catalyst precursor under an inert atmosphere to form a catalyst having the formula AaMmNnXxOo wherein a, m, n, x and o are the molar proportions of A, M, N, X and O, respectively, and o is dependent on the oxidation state of the elements A, M, N and X, wherein A is Mo, W, Fe, Nb, Ta, Zr, Ru or mixtures thereof, M is V, Ce, Cr or mixtures thereof, N is Te, Bi, Sb, Se or mixtures thereof, and X is Nb, Ta, W, Ti, Al, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ni, Pd, Pt, Sb, Bi, B, In, Ce or mixtures thereof. The catalyst is useful for the gas phase oxidation of alkanes to unsaturated aldehydes or carboxylic acids.

    摘要翻译: 制备催化剂的方法包括:将至少一种是含氧化合物的金属化合物和至少一种溶剂混合以形成溶液; 从溶液中除去溶剂,得到催化剂前体; 并在惰性气氛下煅烧催化剂前体以形成具有甲醛的催化剂,m,n,x和o分别是A,M,N,X和O的摩尔比,o取决于氧化态 的元素A,M,N和X,其中A是Mo,W,Fe,Nb,Ta,Zr,Ru或其混合物,M是V,Ce,Cr或其混合物,N是Te,Bi,Sb, Se或其混合物,X为Nb,Ta,W,Ti,Al,Zr,Cr,Mn,Fe,Ru,Co,Rh,Ni,Pd,Pt,Sb,Bi,B,In,Ce或其混合物 。 该催化剂可用于将烷烃气相氧化成不饱和醛或羧酸。