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1. 发明申请

WO1992003234A1 EPOXY/POLYOLEFIN COATING PROCESS 审中-公开
标题翻译：环氧/聚烯烃涂层工艺
公开(公告)号：WO1992003234A1
公开(公告)日：1992-03-05
申请号：PCT/CA1991000293
申请日：1991-08-16
申请人： DU PONT CANADA INC. , VALSPAR, INC. , COX, James, John, William , PFAFF, Toni, Alois
发明人： DU PONT CANADA INC. , VALSPAR, INC.
IPC分类号： B05D07/14
CPC分类号： C08J7/04 , B05D7/148 , C08J2363/00 , F16L58/1054
摘要： A method of coating metallic pipe is disclosed. The method comprises heating the pipe to a temperature of at least 200 °C and applying an epoxy resin composition having a thickness of at least 300 microns to the outer surface of the heated pipe. Before the epoxy resin composition has completely cured, but preferably after it has gelled, a coating of a modified polyolefin is applied in a thickness of up to 500 microns. The modified polyolefin is a homopolymer or copolymer of hydrocarbon alpha-olefins having 2-10 carbon atoms that has been modified by grafting with ethylenically unsaturated organic carboxylic acid or anhydride. An outer coating of a polyolefin is then applied in a thickness of at least 300 microns, the polyolefin being a homopolymer or copolymer of hydrocarbon alpha-olefins having 2-10 carbon atoms and preferably a homopolymer of ethylene or propylene, or a copolymer of ethylene and a C3-C10 hydrocarbon alpha-olefin. The resultant coating is resistant to impact damage and cathodic disbondment. The coated pipe may be used in buried pipelines in the petroleum industry.

2. 发明申请

WO1990012657A1 EPOXY/POLYOLEFIN COATING PROCESS 审中-公开
标题翻译：环氧/聚烯烃涂层工艺
公开(公告)号：WO1990012657A1
公开(公告)日：1990-11-01
申请号：PCT/CA1990000115
申请日：1990-04-06
申请人： DU PONT CANADA, INC. , VALSPAR, INC. , COX, James, John, William , MATTHEWS, Christopher, Ernest
发明人： DU PONT CANADA, INC. , VALSPAR, INC.
IPC分类号： B05D07/14
CPC分类号： F16L58/109 , B05D7/148 , F16L58/1072
摘要： A method of coating metallic pipe is disclosed. The method comprises heating the pipe to a temperature of at least 200 DEG C and applying an epoxy resin composition having a thickness of at least 300 microns to the outer surface of the heated pipe. Before the epoxy resin composition has completely cured, but preferably after it has gelled, a coating of a modified polyolefin is applied in a thickness of at least 300 microns. The modified polyolefin is a homopolymer of copolymer of hydrocarbon alpha-olefins having 2-10 carbon atoms that has been modified by grafting with ethylenically unsaturated organic carboxylic acid or anhydride. The resultant coating is resistant to impact damage and cathodic disbondment. The coated pipe may be used in buried pipelines in the petroleum industry.
摘要翻译：公开了涂敷金属管的方法。该方法包括将管加热到至少200℃的温度，并将至少300微米厚度的环氧树脂组合物加到加热管的外表面上。在环氧树脂组合物完全固化之前，但优选在其凝胶化之后，以至少300微米的厚度施加改性聚烯烃的涂层。改性聚烯烃是具有2-10个碳原子的烃α-烯烃的共聚物的均聚物，其通过用烯属不饱和有机羧酸或酸酐接枝而被改性。所得到的涂层耐冲击损伤和阴极剥离。涂层管道可用于石油工业的埋管。

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