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1. 发明授权

US5416157A Process for improving mechanical shear stability of acrylic enteric polymers 失效
标题翻译：提高丙烯酸肠溶性聚合物机械剪切稳定性的方法
公开(公告)号：US5416157A
公开(公告)日：1995-05-16
申请号：US118904
申请日：1993-09-09
申请人： Robert G. Chen , Nancy M. Clipse
发明人： Robert G. Chen , Nancy M. Clipse
IPC分类号： C08F220/06 , C08F220/18 , C08K5/41 , C08F4/46 , C08K5/05 , C08L33/12
CPC分类号： C08F220/18 , C08F220/06
摘要： Provided is a process useful for making acrylic polymers of methacrylic acid having improved shear stability. The process provides polymers useful as enteric coatings for medicaments having improved coating efficiency of pharmaceutical forms. Also provided are medicaments in solid form coated with said polymers.
摘要翻译：提供了一种用于制备具有改进的剪切稳定性的甲基丙烯酸的丙烯酸聚合物的方法。该方法提供了可用作具有改进的药物形式的包衣效率的药物的肠溶衣的聚合物。还提供了用所述聚合物涂覆的固体形式的药物。

2. 发明授权

US5380790A Process for the preparation of acrylic polymers for pharmaceutical coatings 失效
标题翻译：制备用于药物涂料的丙烯酸聚合物的方法
公开(公告)号：US5380790A
公开(公告)日：1995-01-10
申请号：US118903
申请日：1993-09-09
申请人： Robert G. Chen , Stephen H. Wu
发明人： Robert G. Chen , Stephen H. Wu
IPC分类号： A61K9/28 , C08F220/06 , C08F220/18 , C08K5/41 , A61K9/32 , C08L33/00
CPC分类号： C08F220/18 , A61K9/2846 , C08F220/06
摘要： Provided is a process useful for preparing acrylic polymers of methacrylic acid and ethyl acrylate. The process provides polymers useful as enteric coatings for medicaments in solid form, said coatings having improved effectiveness, reproducibility and coating efficiency. Also provided are medicaments in solid form coated with such polymers.
摘要翻译：提供了用于制备甲基丙烯酸和丙烯酸乙酯的丙烯酸聚合物的方法。该方法提供可用作固体形式的药物的肠溶衣的聚合物，所述涂层具有改善的有效性，再现性和涂布效率。还提供了用这种聚合物涂覆的固体形式的药物。

3. 发明授权

US5117058A Cationic amide/ester compositions as demulsifiers 失效
标题翻译：阳离子酰胺/酯组合物作为破乳剂
公开(公告)号：US5117058A
公开(公告)日：1992-05-26
申请号：US612659
申请日：1990-11-09
申请人： Robert G. Chen , Adelina J. Son
发明人： Robert G. Chen , Adelina J. Son
IPC分类号： C07C233/36 , C07C233/38 , C10G33/04
CPC分类号： C10G33/04 , C07C233/36 , C07C233/38
摘要： Novel cationic amide compositions having the structure ##STR1## where R.sup.1 represents an alkylene group of the formula C.sub.n H.sub.2n, and alkenyl group of the formula C.sub.n H.sub.n, or a phenyl group, or mixtures thereof, where n equals 0 to 10; R.sup.2 represents C.sub.m H.sub.2m, where m equals 1 to 4; R.sup.3 independently represents methyl, ethyl or propyl; and the combination of R.sup.4 and X.sup.- represents the remnant from a quaternizing agent have been discovered and have been found useful as demulsifiers in breaking petroleum emulsions as might be produced during fireflooding petroleum recovery procedures. In one embodiment, the cationic amide/ester compositions are made by reacting (1) a dicarboxylic acid of the formula: ##STR2## where R.sup.1 represents C.sub.n H.sub.2n, where n equals 0 to 10, or an ester or an acid halide thereof; (2) and aminoalkylamine selected from the group consisting of dimethylaminopropylamine, dimethylaminoethylamine, diethylaminopropylamine, diethylaminoethylamine and mixtures thereof; (3) a quaternizing agent is selected from the group consisting of epichlorohydrin, dimethyl sulfate, alkyl halides and benzyl chloride; and (4) from about 0 to about 40 wt. % of at least one oxyalkylated surface active agent having HLB between about 7 and about 16.
摘要翻译：其中R1表示式CnH2n的亚烷基，式CnHn的烯基或苯基或其混合物的新型阳离子酰胺组合物，其中n等于0至10; R2表示CmH2m，其中m等于1至4; 乙烯基或丙基; 并且已经发现来自季铵化剂的残余物的R4和X的组合已经被发现，并且已经被发现可用作破坏石油乳液中的破乳剂，如可能在消防石油采收程序期间产生的那样。在一个实施方案中，阳离子酰胺/酯组合物通过使（1）下式的二羧酸：其中R 1表示C n H 2n，其中n等于0至10，或其酯或其酰卤; （2）和选自二甲基氨基丙胺，二甲基氨基乙胺，二乙基氨基丙胺，二乙基氨基乙胺及其混合物的氨基烷基胺; （3）季铵化剂选自表氯醇，硫酸二甲酯，烷基卤和苄基氯; 和（4）约0至约40wt。至少一种HLB约为7至约16的烷氧基化表面活性剂的％。

4. 发明授权

US4521578A Composition and method of preparation of novel aqueous drilling fluid additives 失效
标题翻译：新型含水钻井液添加剂的组成和制备方法
公开(公告)号：US4521578A
公开(公告)日：1985-06-04
申请号：US536464
申请日：1983-09-26
申请人： Robert G. Chen , Arvind D. Patel , Thomas E. Sample, Jr.
发明人： Robert G. Chen , Arvind D. Patel , Thomas E. Sample, Jr.
IPC分类号： C08F220/02 , C08F220/58 , C09K8/24 , C08F12/30 , C08F4/06 , C08F4/46
CPC分类号： C09K8/24 , C08F220/02 , C08F220/58
摘要： The present invention relates to new compositions and methods of preparation of deflocculents for water-base mud additives. The disclosed materials are low molecular weight terpolymers and graft copolymers consisting essentially of monovalent salts of (1) 5 to 50% by weight of tetrahydrophthalic acid (THPA); (2) 10 to 70% by weight of acrylic acid (AA); (3) 5 to 50% by weight of 2-acrylamido-2-methylpropane sulfonic acid (AMPS); and (4) 0 to 70% by weight of lignosulfonate units. The unique compositions and processes of terpolymers and graft copolymers provide excellent drilling fluid additives which significantly control the viscosity, yield point, gel strength, and fluid loss of drilling fluids over a wide range of temperatures and in the presence of contaminants such as salt, lime, cement, gypsum and drilled solids.
摘要翻译：本发明涉及新的组合物和制备用于水基泥浆添加剂的抗絮凝剂的方法。所公开的材料是基本上由（1）5至50重量％的四氢邻苯二甲酸（THPA）的单价盐组成的低分子量三元共聚物和接枝共聚物; （2）10〜70重量％的丙烯酸（AA）; （3）5-50重量％的2-丙烯酰氨基-2-甲基丙磺酸（AMPS）; 和（4）0至70重量％的木质素磺酸盐单元。三元共聚物和接枝共聚物的独特组成和工艺提供了卓越的钻井液添加剂，可显着控制钻井液在宽温度范围内和存在污染物如盐，石灰的粘度，屈服点，凝胶强度和流体损失，水泥，石膏和钻孔固体。

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