Patent US2261579A successfully refreshed from Google Patents.
Patent AU700129B2 successfully refreshed from Google Patents.
AU700129B2
Expired / Lapsed
AU
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Improving the quality of coated paper
Assignee: Imerys Minerals Ltd
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Filing: 1995-09-29
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Granted: 1998-12-24
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Expires: 2015-09-29
Abstract
No abstract record available.
Inventors
- 👤 David Frederick Bailey
- 👤 Ulrika Elofsson
- 👤 John Claude Husband
Bibliographic Details
Application Number
—
Jurisdiction
AU
Data Source
google_patents
Last Synchronized
2026-10-29 23:54
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/80; D21H19/82; D21H19/822; D21H19/36; D21H19/44; D21H19/46; D21H21/00; D21H21/14; D21H21/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
85 words
A method of coating a cellulosic sheet material, which method comprises coating the cellulosic sheet material with at least one preliminary inorganic pigment-containing coating composition and then with a final inorganic pigment-containing coating composition, wherein there is present in the preliminary coating composition, or in at least one of the preliminary coating compositions, from 0.01 to 0.30% by weight, based upon the weight of the inorganic pigment, of a sizing reagent selected from an alkyl ketene dimer, an alkenyl succinic anhydride or an anionic polyurethane.
Claim 2
Independent Claim
85 words
A method of coating a cellulosic sheet material, which method comprises coating the cellulosic sheet material with at least one preliminary inorganic pigment-containing coating composition and then with a final inorganic pigment-containing coating composition, wherein there is present in the preliminary coating composition, or in at least one of the preliminary coating compositions, from 0.01 to 0.30% by weight, based upon the weight of the inorganic pigment, of a sizing reagent selected from an alkyl ketene dimer, an alkenyl succinic anhydride or an anionic polyurethane.
Claim 3
Dependent Claim
26 words
A method according to claim 1, wherein the S; inorganic pigment is kaolin clay, calcium carbonate, 15 titanium dioxide, calcium sulphate, barium sulphate or satin white.
Claim 4
Dependent Claim
19 words
'A method according to claim 1 or 2, wherein the preliminary and/or final coating compositions additionally contain an adhesive.
Claim 5
Dependent Claim
49 words
A method according to claim 3, wherein the adhesive is a starch, a proteinaceous adhesive or a polymer latex.. A method according to claim 3 or 4, wherein the adhesive is present in an amount of from 4 to by weight, based on the weight of the inorganic pigment.
Claim 6
Independent Claim
21 words
A method according to any of claims 1 to wherein the preliminary and/or final coating compositions additionally contain a dispersing agent.
Claim 7
Dependent Claim
30 words
A method according to claim 6, wherein the dispersing agent is present in an amount of from 0.02 to i% by weight, based on the weight of the inorganic pigment.
Claim 8
Dependent Claim
15 words
A method according to claim 1, substantially as described in any of the foregoing Examples.
Claim 9
Dependent Claim
169 words
A cellulosic sheet material which has been I 1A coated by a method according to any of claims 1 to 8. Dated this 25th day of May 1998 ECC INTERNATIONAL~ LIMITED BY ITS PATENT ATTORNEYS CARTER SMITH BEADLE 9 9 00 99 9 0 4 09 0.99 9. 0* 9 09 9* 0 9 9 *4 00 4 4 9 9*99 99 49 99 0 *9 9 0009 *9 4 9. C IMPROVING THE QUALITY OF COATED PAPER ABSTRACT There is disclosed a method for improving the ease of application of a final inorganic pigment-containing coating to a cellulosic sheet material which has been coated with at least one preliminary inorganic pigment- containing coating. The method comprises incorporating into the preliminary coating or into at least one of the preliminary coatings, up to 2% by weight, based upon the weight of the inorganic pigment, of a sizing reagent, such as an alkyl ketene dimer. A composition for use in the method is also disclosed. Oti Otte S:" I reli
References Cited (Backward Citations)
US4962072A
Cited
JPH0625999A
Cited
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