Ready-mixed, setting-type cementitious composition having separately packaged accelerator
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C04B-024/14
C04B-011/00
출원번호
US-0499366
(1983-05-31)
발명자
/ 주소
Jakacki Edwin J. (Buffalo Grove IL) Ogle Larry G. (Woodstock IL) Landwer Jonathan C. (Palatine IL) Andersen James C. (Wildwood IL)
출원인 / 주소
United States Gypsum Company (Chicago IL 02)
인용정보
피인용 횟수 :
33인용 특허 :
3
초록▼
A setting-type cementitious composition useful for a variety of applications, including, in a preferred embodiment, a joint compound for finishing joints between adjacent gypsum wallboards, comprising a first or cementitious component in pre-mixed form comprising an aqueous slurry of calcium sulfate
A setting-type cementitious composition useful for a variety of applications, including, in a preferred embodiment, a joint compound for finishing joints between adjacent gypsum wallboards, comprising a first or cementitious component in pre-mixed form comprising an aqueous slurry of calcium sulfate hemihydrate and a retarder formed of two ingredients, one an organic retarder and the other a retarder which is a chelating agent, and a second or accelerator component comprising an accelerator material preferably in aqueous solution, the first component having an adequately long shelf life suitable for marketing, and, when the cementitious component is mixed with the second component for acceleration, the cementitious mixture acquires excellent application properties maintained throughout a suitable working period. The cementitious component hydrates after a suitable period to form a set material of excellent properties. When utilized as a joint compound, the first or cementitious component additionally includes a non-leveling or thixotropic agent and other ingredients conventionally utilized in joint compound compositions.
대표청구항▼
A group of separately packaged components for preparing a setting-type joint compound for finishing joints between adjacent gypsum wallboards, comprising: A. a cementitious component in pre-mixed form comprising an aqueous slurry of calcium sulfate hemihydrate, a non-leveling agent, and a combinatio
A group of separately packaged components for preparing a setting-type joint compound for finishing joints between adjacent gypsum wallboards, comprising: A. a cementitious component in pre-mixed form comprising an aqueous slurry of calcium sulfate hemihydrate, a non-leveling agent, and a combination retarder comprising a proteinaceous composition formed from animal tissues and a chelating agent selected from the group consisting of ethylene diamine tetraacetic acid, diethylene triamine pentaacetic acid, and salts thereof, said chelating agent having the ability to chelate calcium ions, the ratio between said proteinaceous composition and said chelating agent being in the range of from about 5:1 to about 1:3 by dry weight, and B. an accelerator component comprising a compound having a cation with a log K value greater than that of calcium ions and, which, when mixed with said cementitious component, reacts with said chelating agent to release said chelated calcium ions to permit said joint compound to set, said cementitious components having a shelf life of at least about 118 days, and, when mixed with said accelerator component, providing a joint compound having a suitable working period, suitable properties including non-levelling properties, and the ability to set to form a good joint between said gypsum wallboards.
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이 특허에 인용된 특허 (3)
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