Gellan gum sizing

• US 5,112,445 A
• Filed: 06/23/1989
• Issued: 05/12/1992
• Est. Priority Date: 06/23/1989
• Status: Expired due to Fees

• Current Assignee: Cp Kelco (JM Huber Corporation)
• Original Assignee: Merck & Co., Inc.
• Inventors: Clare, Kenneth, Ortega, Theresa M., Dial, Harold D., Winston, Philip E. Jr.
• Primary Examiner(s): Griffin, Ronald W.
• Application Number:
  US07/370,496
• Time in Patent Office: 1,054 Days
• Field of Search: 536/114, 536/1, 536/119, 106/209, 106/163.1, 106/169, 106/170, 8/115.6, 162/135, 162/158, 162/164.1, 162/177, 162/178
• US Class Current: 162/178
• CPC Class Codes: D21H 17/28 Starch
• CPC Class Codes: D21H 17/31 Gums
• CPC Class Codes: D21H 17/36 Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
• CPC Class Codes: D21H 19/34 comprising cellulose or derivatives thereof

Abstract

Surface sizes comprising 1) gellan gum and 2) one or more film-forming polymers such as chemically modified starch, cellulose derivatives, and polyvinyl alcohol are described. The compositions exhibit enhanced film-forming properties.

Claims

1. A method for sizing paper which comprises coating paper with a composition comprising 0.03-0.6 wt. % gellan gum, 6-12 wt. % film forming polymer, 0.02-0.2 wt. % gelling salt, and water.

2. A method of claim 1 wherein the amount of gellan gum and the amount of film-forming polymer form a ratio of between about 1:

99 and about 8;

92.