发明名称 |
Drilling mud compositions containing high molecular weight poly(vinylamines). |
摘要 |
The inverse emulsion polymerization of a monomer of the formula <CHEM> wherein R and R<1> represent hydrogen or a C1-C4 alkyl group, using a surfactant system having a hydrophilic-lipophilic balance value from 4 to 9, an azo-type free radical initiator and certain hydrocarbon liquids to yield a water-in-oil emulsion of a homopolymer of at least 10<6> average molecular weight, the emulsion having a viscosity less than 10 cps, at 15% solids, 60 rpm Brookfield and 20 DEG C. Also disclosed is the preparation of poly(vinylamines) of at least 10<6> average molecular weight by acid or base hydrolysis of the homopolymer emulsion. Also disclosed are drilling mud compositions containing the poly(vinylamines) and demonstrating superior properties. |
申请公布号 |
EP0331046(A1) |
申请公布日期 |
1989.09.06 |
申请号 |
EP19890103304 |
申请日期 |
1989.02.24 |
申请人 |
AIR PRODUCTS AND CHEMICALS, INC. |
发明人 |
LAI, TA-WANG;VIJAYENDRAN, BHEEMA RAO |
分类号 |
C09K8/04;C08F8/12;C08F26/00;C08F126/00;C08L39/00;C08L39/02;C09K8/22 |
主分类号 |
C09K8/04 |
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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