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    • 1. 发明授权
    • Alkyl percarbonates
    • 烷基过碳酸酯
    • US4584142A
    • 1986-04-22
    • US548373
    • 1983-11-03
    • Robert H. TangJames A. Barter
    • Robert H. TangJames A. Barter
    • C07C409/34C08F299/04C07C179/15
    • C08F299/045C07C409/32
    • Organic peroxydicarbonates represented by the following graphic formula are described. ##STR1## In the formula, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently selected from an alkyl group containing from 1 to 4 carbon atoms. R.sub.1 and R.sub.2 and/or R.sub.3 and R.sub.4 can participate in a cycloalkyl group having from 3 to 6 carbon atoms. The peroxydicarbonates are useful as initiators for the polymerization or copolymerization of ethylenically unsaturated monomers or the cross-linking of unsaturated polyester resins. The organic peroxydicarbonates can be used in combination with commercially available peroxydicarbonates, particularly those having a longer half-life, or with peresters, diacylperoxides and azo compounds.
    • 描述由以下图形公式表示的有机过氧化二碳酸酯。 在该式中,R 1,R 2,R 3和R 4各自独立地选自含有1至4个碳原子的烷基。 R 1和R 2和/或R 3和R 4可以参与具有3至6个碳原子的环烷基。 过氧二碳酸酯可用作烯属不饱和单体的聚合或共聚的引发剂或不饱和聚酯树脂的交联。 有机过氧二碳酸酯可以与市售的过氧化二碳酸酯,特别是具有较长半衰期的过氧碳酸酯,或与过氧化物,二酰基过氧化物和偶氮化合物组合使用。
    • 4. 发明授权
    • Organic acid anhydride-peroxydicarbonate composition
    • 有机酸酐 - 过氧化二碳酸酯组合物
    • US4008175A
    • 1977-02-15
    • US594411
    • 1975-07-09
    • James A. Barter
    • James A. Barter
    • C08F2/00C08F4/32C08F283/01C08F299/04C08F4/34C08F4/38
    • C08F299/0442C08F283/01C08F4/32
    • Ethylenically unsaturated material susceptible to free-radical polymerization, e.g., vinyl chloride and unsaturated polyesters, is polymerized, e.g., in an aqueous medium with an alkaline buffering reagent and an initiator system comprising an acid anhydride, e.g., isobutyric anhydride, and a peroxygen compound selected from an organic peroxy acid (peracid), e.g., peracetic acid, and hydrogen peroxide. Optionally, a further organic free-radical type initiator, e.g., lauroyl peroxide, a dialkyl peroxydicarbonate or azobisisobutyronitrile, is used in combination with the acid anhydride and peroxygen compound.Preferably, the anhydride and peroxygen compound are introduced separately into the polymerization medium. It is believed that at least a portion of the anhydride combines with the peroxygen compound to form the corresponding diacyl peroxide.
    • 易于自由基聚合的烯键式不饱和物质,例如氯乙烯和不饱和聚酯,例如在具有碱性缓冲剂的水性介质和包含酸酐(例如异丁酸酐和过氧化合物)的引发剂体系中聚合 选自有机过氧酸(过酸),例如过乙酸和过氧化氢。 任选地,将另外的有机自由基型引发剂,例如过氧化月桂酰,过氧化二碳酸二烷基酯或偶氮二异丁腈与酸酐和过氧化合物组合使用。