Mortar admixture

• US 4,707,187 A
• Filed: 10/07/1986
• Issued: 11/17/1987
• Est. Priority Date: 06/07/1984
• Status: Expired due to Fees

• Current Assignee: Daicel Chemical Industries Limited
• Original Assignee: Daicel Chemical Industries Limited
• Inventors: Namikoshi, Hajime, Tsuda, Kenji
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US06/916,242
• Time in Patent Office: 406 Days
• Field of Search: 106/93, 106/314, 166/293
• US Class Current: 106/730
• CPC Class Codes: C04B 24/383 Cellulose or derivatives thereof

Abstract

A mortar composition comprises a mortar and a carboxymethyl hydroxyethyl cellulose (CMHEC) having a degree of substitution (DS), by carboxymethyl group per a glucose unit, of 0.7 or less and a molar substitution (MS), by ethylene oxide per a glucose unit, of 1.2 to 7.0.

Claims

1. A mortar composition, consisting essentially of:

mortar consisting essentially of hydraulic inorganic cement, water and fine aggregate; and

from 0.05 to 1.0 part by weight of carboxymethylhydroxyethylcellulose (CMHEC), per 100 parts by weight of said mortar for improving the trowellability and spreadability of the mortar, said CMHEC having a carboxymethyl degree of substitution of from 0.01 to 0.7 per anhydroglucose unit, said CMHEC having an ethylene oxide molar substitution of 3.10 to 4.65 per anhydroglucose unit, a 1% aqueous solution of said CMHEC having a viscosity of 50 to 7000 cps, at 25°

C.

2. A mortar composition as claimed in claim 1 in which said 1% aqueous solution of said CMHEC has a viscosity of 212 to 1286 cps, at 25°

C.