EP0118637A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Tape joint cement composition
Assignee: Hercules LLC
•
Filing: 1983-10-11
•
Granted: —
•
Expires: 2003-10-11
Abstract
Abstract Tape joint cement composition suitable for use with wallboard is disclosed wherein hydroxypropyl hydroxyethyl cellulose having specified substitution levels is employed as the water retention aid and thickener.
Inventors
- 👤 Armand Joseph Desmarais
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:42
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1015; C04; C04B; C04B26/00; C04B26/02; C04B26/04; C09D; C09D5/00; C09D5/34; C09K2200/00; C09K2200/02; C09K2200/0243; C09K2200/0252; C09K2200/0256; C09K2200/026; C09K2200/0265; C09K2200/06; C09K2200/0615; C09K2200/0617; C09K2200/062; C09K2200/0622
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
In a joint cement composition which comprises limestone, mica, at least one clay, and a latex binder as its principal ingredients, the improvement which comprises the addition of from about 0.2% to about 2.0%, by weight based on the dry ingredients, of hydroxypropyl hydroxyethyl cellulose having a hydroxyethyl substitution from about 0.7 to about 4.0 M.S. and a hydroxypropyl substitution greater than 0.36 M.S. as a water retention aid.
Claim 2
Dependent Claim
69 words
In a joint cement composition which comprises limestone, mica, at least one clay, and a latex binder as its principal ingredients, the improvement which comprises the addition of from about 0.2% to about 2.0%, by weight based on the dry ingredients, of hydroxypropyl hydroxyethyl cellulose having a hydroxyethyl substitution from about 0.7 to about 4.0 M.S. and a hydroxypropyl substitution greater than 0.36 M.S. as a water retention aid.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein the hydroxypropyl hydroxyethyl cellulose has a hydroxypropyl substitution greater than 0.6 M.S.
Claim 4
Dependent Claim
30 words
The composition of claim 2 wherein the hydroxypropyl hydroxyethyl cellulose has a hydroxyethyl M.S. from about 0.8 to about 1.8 and a hydroxypropyl M.S. from about 0.8 to about 1.5.
Claim 5
Dependent Claim
21 words
The composition of claim 1 wherein the hydroxypropyi hydroxyethyl cellulose is present at a concentration from about 0.5% to about 1.0%.
Claim 6
Dependent Claim
77 words
In joint cement composition which comprises limestone; mica; a clay selected from the group consisting of attapulgite, bentonite, and mixtures thereof; and a latex binder as its principal ingredients, the improvement which comprises the addition of from about 0.2% to about 2.0%, by weight based on the dry ingredients, of hydroxypropyl hydroxyethyl cellulose having a hydroxyethyl substitution from about 0.7 to about 4.0 M.S. and a hydroxypropyl substitution greater than 0.36 M.S. as a water retention aid.
Claim 7
Dependent Claim
77 words
In joint cement composition which comprises limestone; mica; a clay selected from the group consisting of attapulgite, bentonite, and mixtures thereof; and a latex binder as its principal ingredients, the improvement which comprises the addition of from about 0.2% to about 2.0%, by weight based on the dry ingredients, of hydroxypropyl hydroxyethyl cellulose having a hydroxyethyl substitution from about 0.7 to about 4.0 M.S. and a hydroxypropyl substitution greater than 0.36 M.S. as a water retention aid.
Claim 8
Dependent Claim
18 words
The composition of claim 5 wherein the hydroxypropyl hydroxyethyl cellulose has a hydroxypropyl substitution greater than 0.6 M.S.
Claim 9
Dependent Claim
30 words
The composition of claim 6 wherein the hydroxypropyl hydroxyethyl cellulose has a hydroxyethyl M.S. from about 0.8 to about 1.8 and a hydroxypropyl M.S. from about 0.8 to about 1.5.
Claim 10
Dependent Claim
21 words
The composition of claim 5 wherein the hydroxypropyl hydroxyethyl cellulose is present at a concentration from about 0.5% to about 1.0%.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.