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公开(公告)号：EP0751975A4
公开(公告)日：1997-12-17
申请号：EP95912571
申请日：1995-02-15
IPC分类号： C08F8/04 , C08C19/04 , C08C19/22 , C08C19/34 , C08F8/30 , C08F8/32 , C08L39/00 , C08F20/44 , C08F36/06 , C08L9/00 , C08L9/04
摘要： The present invention relates to a process for the preparation of a latex of hydrogenated elastomeric polymer comprising: (1) combining an unsaturated polymer in latex form with (a) an oxidant selected from the group consisting of oxygen, air and hydroperoxide; (b) a reducing agent selected from hydrazine and hydrates thereof; and (c) a metal ion activator; (2) heating the mixture to a temperature from 0 DEG C to the reflux temperature of the reaction mixture; (3) treating the mixture with ozone in an amount and under conditions which are sufficient for the ozone to react with residual polymer unsaturation to form an ozonated latex of elastomeric polymer having at least one terminal aldehyde end group; (4) treating the ozonated latex with hydroxylamine in an amount and under conditions which are sufficient to convert aldehyde end groups of the elastomeric polymer to oxime end groups to form an oximated polymer latex.
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公开(公告)号：EP0663869A4
公开(公告)日：1996-05-15
申请号：EP93919932
申请日：1993-08-09
CPC分类号： C08J7/047 , B60C13/002 , C08J2415/00 , C09D115/00 , Y10T428/24967 , Y10T428/31833 , Y10T428/31924 , Y10T428/31931
摘要： A polymeric article which is subject to attack by oxygen ozone and/or ultraviolet light is coated with a thin coating of a polymer which is resistant to oxygen, ozone and UV light. It protects the article from cracking or degradation due to any of these causes. The uncoated article serves as a substrate. The substrate may be any polymer which is subject to attach by oxygen, ozone and/or ultraviolet light. A preferred coating is cured from a highly saturated polymer having only a small amount of unsaturation, as for example, hydrogenated nitrile rubber (HNBR, or hydrogenated nitrile/butadiene copolymer), highly saturated styrene/butadiene copolymer, hydrogenated polybutadiene, or hydrogenated styrene/vinylpyridine/butadiene terpolymer. The hydrogenated or highly saturated polymer of the coating is obtained by hydrogenating an unsaturated polymer which is a polymer of 1,3-butadiene (5-100% by weight) and optionally one or more monoethylenically unsaturated polymers (0-95% by weight). The cured coatings are typically elastomeric. The coating is applied as an uncured highly saturated polymer latex, which is dried and cured in place on the substrate to yield the desired coated article. The thickness of the coating may be about 0.5 mil (0.0005 inch) up to approximately 10 mils (0.01 inch).
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