发明名称 |
Polymers having polyethylenic backbone useful in packaging and adhesive applications and their use as oxygen scavengers in packaged products |
摘要 |
Disclosed is a process for esterifying and/or transesterifying a polymer having a polyethylenic backbone and pendant acid and/or ester moieties comprising contacting a melt of the polymer with a transesterifying compound so that the polymer undergoes esterification and/or transesterification but not alcoholysis. The esterified or transesterified polymer also has pendant ester moieties that differ in kind and/or number from the unreacted polymer. In one embodiment, the process also comprises adding an amount of a transition metal salt that is effective to promote oxygen scavenging. Also in a further embodiment, the process comprises irridiating the transesterified polymer with actinic radiation to reduce the induction period before oxygen scavenging commences. Also disclosed are compositions comprising a component which comprises an ethylenic or polyethylenic backbone and a pendant or terminal moiety comprising a benzylic, allylic, or ether-containing radical. The invention also embodies new polyethylenic oxygen scavenging compositions comprising a transition-metal salt and the above component. Methods of making the compositions, and methods and compositions using the ethylenic or polyethylenic compositions, are disclosed.
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申请公布号 |
NZ307065(A) |
申请公布日期 |
1999.11.29 |
申请号 |
NZ19960307065 |
申请日期 |
1996.04.29 |
申请人 |
CHEVRON CHEMICAL COMPANY |
发明人 |
CHING, TA YEN;KATSUMOTO, KIYOSHI;CURRENT, STEVEN P;THEARD, LESLIE P |
分类号 |
B65D65/40;B32B27/08;B32B27/18;B32B27/32;B65D65/38;C08F8/00;C08F8/14;C08J5/18;C08K5/098;C08L23/08;C08L23/26;(IPC1-7):C08F216/12;C08L33/08 |
主分类号 |
B65D65/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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