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公开(公告)号：US5932019A
公开(公告)日：1999-08-03
申请号：US885070
申请日：1997-06-30
CPC分类号： C23G1/02 , B08B17/00 , B08B3/08 , C04B41/5315
摘要： The present invention relates to a method for minimizing the buildup of set gypsum on a tool used to apply a calcium sulfate hemihydrate-containing composition to a surface as well as to a method for cleaning a tool having set gypsum deposited thereon. The method for cleaning a tool having set gypsum deposited thereon comprises the steps of (a) contacting the tool with a cleaning solution having a pH of less than about 7, said cleaning solution which comprises a non-calcium phosphate, water, and, optionally, a pH modifier; (b) optionally agitating the solution; (c) removing the tool from the cleaning solution; and (d) rinsing the tool with water. The method for minimizing the buildup of set gypsum on a tool further comprises step (e) using the tool to apply a calcium sulfate hemihydrate-containing composition. An additional step (f), flushing the tool with water, may also be employed. Optionally, steps (a) through (e) or (a) through (f) may be repeated during the application of the calcium sulfate hemihydrate-containing composition. Examples of non-calcium phosphates which may be used in the cleaning solution are sodium, potassium, or ammonium salts such as tetrasodium pyrophosphate, tetrapotassium pyrophosphate and sodium tripolyphosphate.
摘要翻译： 本发明涉及一种使用于将表面上含有硫酸钙半水合物的组合物施用于工具上的凝结石膏的积聚最小化的方法以及用于清洁沉积有凝固石膏的工具的方法。 用于清洁其上沉积有石膏的工具的方法包括以下步骤：（a）使工具与pH小于约7的清洁溶液接触，所述清洁溶液包含非磷酸钙，水和任选地 ，pH调节剂; （b）任选地搅拌该溶液; （c）从清洁溶液中取出工具; 和（d）用水冲洗工具。 用于最小化工具上积聚石膏的方法还包括使用该工具施加含硫酸钙半水合物的组合物的步骤（e）。 还可以使用额外的步骤（f），用水冲洗工具。 任选地，在施用含硫酸钙半水合物的组合物期间可以重复步骤（a）至（e）或（a）至（f）。 可用于清洁溶液中的非磷酸钙的实例是钠，钾或铵盐，例如焦磷酸四钠，焦磷酸四钾和三聚磷酸钠。
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公开(公告)号：US06228163B1
公开(公告)日：2001-05-08
申请号：US09474485
申请日：1999-12-29
IPC分类号： C04B2814
CPC分类号： C04B40/0658 , C04B28/145 , C04B2103/12 , C04B2103/22 , C04B2111/00672 , C04B2111/10 , C04B14/042 , C04B14/18 , C04B14/20 , C04B14/28 , C04B16/08 , C04B20/0048 , C04B22/16 , C04B22/142 , C04B24/06 , C04B24/26 , C04B24/2641 , C04B24/383 , C04B2103/69 , C04B40/065
摘要： A two part joint compound which sets by hydration of calcium sulfate hemihydrate to gypsum and is clay-free. One part includes an in-situ acidic acrylate copolymer thickener (i.e., an associative thickener) with the calcium sulfate hemihydrate, along with a non-calcium bearing phosphate set preventer. The first part contains water, but remains unset for at least 175 days. The second part includes a set initiator compound having a cation with a log K value greater than calcium ions. The second part is mixed with the first part when setting is desired.
摘要翻译： 一种两部分联合化合物，其通过将硫酸钙半水合物水合成石膏并且是无粘土的。 一部分包括与硫酸钙半水合物一起的原位酸性丙烯酸酯共聚物增稠剂（即，缔合增稠剂）以及非含钙的磷酸酯防止剂。 第一部分含有水，但至少175天仍然没有。 第二部分包括具有log K值大于钙离子的阳离子的凝胶引发剂化合物。 当需要设置时，第二部分与第一部分混合。
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公开(公告)号：US5746822A
公开(公告)日：1998-05-05
申请号：US585548
申请日：1996-01-11
CPC分类号： C04B22/142 , C04B22/16 , C04B26/04 , C04B28/14 , C04B40/0658 , C04B2111/00672
摘要： A cementitious composition of the setting type which can be kept in a ready-mixed state and which can be caused to set and harden upon introduction of an accelerator with reproducibility and set time predictability. The cementitious base composition contains calcium sulfate hemihydrate as a principal filler material and certain non-calcium bearing phosphate additives which prevent setting action in the presence of water. An accelerator, such as zinc sulfate, may be added to the ready-mixed, cementitious composition to initiate the setting action, or the ready-mixed cementitious composition can be used as a drying type joint compound without the addition of an accelerator.
摘要翻译： 可以保持准备混合状态的凝固型水泥组合物，并且可以在重新引入加速剂时设定和硬化并设定时间可预测性。 水泥基组合物含有半水合硫酸钙作为主要填料和某些防止在水存在下固化作用的非含钙磷酸盐添加剂。 可以向预混合的水泥组合物中加入硫酸锌等促进剂以引发凝固作用，或者将预混合水泥组合物用作干燥型接头化合物而不添加促进剂。
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4.发明授权Clay-free, asbestos-free and glass microbubble-free drying type joint compounds 失效无粘土，无石棉和玻璃微泡干燥型联合化合物
公开(公告)号：US5336318A
公开(公告)日：1994-08-09
申请号：US25613
申请日：1993-03-03
CPC分类号： C04B26/04 , C04B2111/00112 , C04B2111/00672 , Y02W30/97 , Y10S106/02
摘要： A clay-free, asbestos-free and glass microbubble-free, drying type Joint compound containing an in-situ or associative thickener as a substitute for asbestos and any clay substitute therefor. In particular, these drying type joint compounds contain no attapulgus clay thereby improving viscosity stability, crack resistance and shrinkage. The lightweight joint compounds contain treated expanded perlite, treated to render it water-insensitive. The preferred in-situ thickeners are acidic acrylate copolymers. It has been found that the in-situ thickeners should be used in combination with the normal cellulosic thickeners used in joint compounds Instead of as replacements therefor. The joint compounds contain the usual fillers and latex emulsion binders, with at least about 50% by weight of the drying type joint compound being a filler selected from the group consisting of calcium carbonate and calcium sulfate dihydrate.
摘要翻译： 无粘土，无石棉和玻璃微泡，干燥型联合化合物，含有原位或缔合性增稠剂，代替石棉和任何粘土替代品。 特别地，这些干燥型接头化合物不含attapulgus粘土，从而提高粘度稳定性，抗裂性和收缩率。 轻质的关节化合物含有经处理的膨胀珍珠岩，经处理以使其不受水敏感。 优选的原位增稠剂是酸性丙烯酸酯共聚物。 已经发现原位增稠剂应与用于接合化合物中的正常纤维素增稠剂组合使用，而不是作为替代物。 关节化合物含有通常的填充剂和胶乳乳液粘合剂，至少约50重量％的干燥型接头化合物是选自碳酸钙和硫酸钙二水合物的填料。
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