PREPARATION OF POLYHEMIACETALS
    112.
    发明专利

    公开(公告)号:AU633126B2

    公开(公告)日:1993-01-21

    申请号:AU6018490

    申请日:1990-08-03

    Abstract: Novel hemiacetalised derivatives of polyketones (linear alternating polymers of carbon monoxide and one or more alkenes are prepared by reacting the polyketone with a diol of formula HOZOH, where Z = -(C(R)2)n-, the R groups are independently H, OH or C1 to C10 alkyl or hydroxyalkyl and n is 2 to 6. The process of preparation is characterised by using a molar ratio of diol to carbonyl groups in the polyketone of at least 5:1.

    CLEANING COMPOSITIONS
    113.
    发明专利

    公开(公告)号:AU1965792A

    公开(公告)日:1993-01-21

    申请号:AU1965792

    申请日:1992-07-13

    Abstract: This invention relates to a composition for cleaning contaminated electronic substrates. The compossition comprises a blend of 2-30% w/w of ethoxyethoxy ethanol and at least one other glycol ether derivative selected from butoxyethoxy ethanol, methoxypropoxy propanol, ethoxypropoxy propanol and C1-C5 monocarboxylic acid esters thereof. These esters are more environmentally safe and more user friendly than halohydrocarbons used hitherto for cleaning fluxes and solders from circuit boards.

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