Clay slurries

• US 4,017,324 A
• Filed: 02/19/1974
• Issued: 04/12/1977
• Est. Priority Date: 02/19/1974
• Status: Expired due to Term

• Current Assignee: IMC Chemical Group Incorporated
• Original Assignee: IMC Chemical Group Incorporated
• Inventors: Eggers, Warren J.
• Primary Examiner(s): Poer, J.
• Assistant Examiner(s): Wright, William G.
• Application Number:
  US05/443,560
• Time in Patent Office: 1,148 Days
• Field of Search: 106/72, 106/288 B
• US Class Current: 106/487
• CPC Class Codes: C04B 33/13 Compounding ingredients C04B33/36, C04B35/71 take precedence ; pigments for ceramics C09C1/0009
• CPC Class Codes: C09D 17/004 containing an inorganic pigment

Abstract

A clay slurry containing 50% or more of non-volatile solids comprising calcined kaolin clay and from 8 - 331/3% of hydrated kaolin clay based on the weight of the calcined clay. Additionally the slurry contains from 0.01% to 10% of a suspending agent such as bentonite clay, hydroxyethyl cellulose, methyl cellulose, carboxymethyl cellulose and a dispersant such as a non-ionic surfactant, an anionic surfactant or an alkanolamine.

Claims

1. An aqueous slurry of kaolin clay, water, a suspending agent and a dispersant and exhibiting minimum settling, the clay portion consisting essentially of calcined kaolin clay and hydrated kaolin clay in a ratio of about 2.75 parts of said calcined clay to one of said hydrated clay at a total clay content of about 75%.

2. An aqueous slurry of kaolin clay, water, a suspending agent and a dispersant and exhibiting minimum settling, the clay portion consisting essentially of calcined kaolin clay, about 245 parts, and hydrated kaolin clay, about 80 parts, for a ratio of about 3:

1 at a total clay content of about 65%.

3. An aqueous slurry of kaolin clay, water, a suspending agent and a dispersant and exhibiting minimum settling, the clay portion consisting essentially of calcined kaolin clay, about 262.5 parts, and hydrated kaolin clay, about 87.5 parts, for a ratio of about 3:

1 at a total clay content of about 70%.