# US 8,785,578 B2 · Paper coatings of amphiphilic, non-water-soluble comb-branched (meth)acrylic polymers, uses thereof

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- Number: US 8,785,578 B2
- Document ID: US8785578B2
- Status: Granted
- Kind: B2
- Application number: 13/166,903
- Filed: 2011-06-23
- Published: 2012-02-23
- Granted: 2014-07-22
- Earliest claimed: 2010-08-19
- Assignees: Coatex
- Applicants: Jean-Marc Suau; Murielle Guillot
- Inventors: Jean-Marc Suau; Murielle Guillot
- Web page: https://patentgrep.com/patent/US8785578B2

## CPC

- D21H 21/10: Retention agents or drainage improvers
- C08F 220/18: with acrylic or methacrylic acids
- C08F 220/285: {and containing a polyether chain in the alcohol moiety}
- C08F 290/062: {Polyethers}
- C09D 155/005: {Homopolymers or copolymers obtained by polymerisation of macromolecular compounds terminated by a carbon-to-carbon double bond}
- D21H 17/34: obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H 17/35: Polyalkenes, e.g. polystyrene
- D21H 17/36: Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
- D21H 17/37: Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
- D21H 19/56: Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H 19/60: Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters
- C08F 220/06: Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
- C08F 220/288: {and containing polypropylene-co-ethylene oxide in the alcohol moiety}
- D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)

## Abstract

Polymers, paper coating compositions, and coated paper.

## Claims

### Claim 1

A polymer comprising, expressed as a % by weight of each of the monomers, polymerized units of the following monomers:
a) 30% to 60% of at least one hydroxy- and/or methoxy-polyalkylene glycol monomer, with the formula R-(EO)m-(PO)n-R′, where:
m and n designate integers less than or equal to 150, at least one of which is non-zero,
EO and PO respectively designate ethylene oxide and propylene oxide,
R designates a methacrylate or methacrylurethane function, and
R′ designates a hydrogen radical or a methyl radical,
b) 48% to 60% of at least one monomer selected from the group consisting of styrene and (meth)acrylic esters whose ester portion has 1 to 4 carbon atoms,
c) 0.1% to 10% of at least one of acrylic acid and methacrylic acid,
d) 0 to 5% of a monomer whose formula is R-(EO)m-(PO)n-R″, where:
m and n designate integers less than or equal to 150, at least one of which is non-zero,
EO and PO respectively designate ethylene oxide and propylene oxide,
R designates a methacrylate or methacrylurethane function,
R″ designates an alkyl or aryl or alkylaryl group having 8 to 32 linear or branched carbon atoms,
e) 0 to 5% of a monomer comprising two ethylenic unsaturations,
the sum of a), b), c), d), and e) being equal to 100%,
wherein said polymer is non-water-soluble in acid form.

### Claim 2 (depends on 1)

The polymer according to claim 1, wherein said polymer has an average molar mass by weight of 1,000,000-6,000,000 g/mol, as determined by GPC.

### Claim 3 (depends on 1)

The polymer according to claim 1, wherein said polymer is in acid form and is non-water-soluble.

### Claim 4 (depends on 1)

The polymer according to claim 1, wherein said polymer is partially in salt form.

### Claim 5 (depends on 4)

The polymer according to claim 4, wherein said polymer is a sodium or potassium partial salt.

### Claim 6 (depends on 1)

The polymer according to claim 1, wherein said polymer is fully in salt form.

### Claim 7 (depends on 6)

The polymer according to claim 6, wherein said polymer is a sodium or potassium salt.

### Claim 8 (depends on 1)

The polymer according to claim 1, comprising a positive amount of polymerized units of monomer d) of the formula R-(EO)m-(PO)n-R″.

### Claim 9 (depends on 1)

The polymer according to claim 1, comprising a positive amount of polymerized units of monomer e) comprising two ethylenic unsaturations.

### Claim 10 (depends on 8)

The polymer according to claim 8, comprising a positive amount of polymerized units of monomer e) comprising two ethylenic unsaturations.

### Claim 11

A paper coating composition comprising a mineral material and:
1) 3 parts to 20 parts by weight of a binder per 100 parts by dry weight of mineral material,
2) 0.1 parts to 2 parts by weight of a polymer per 100 parts by dry weight of mineral material, and
3) water in a quantity by weight of between 20% and 80%, compared to the total weight of the paper coating composition,
wherein said polymer is a polymer comprising, expressed as a % by weight of each of the monomers, polymerized units of the following monomers:
a) 30% to 60% of at least one hydroxy- and/or methoxy-polyalkylene glycol monomer, with the formula R-(EO)m-(PO)n-R′, where:
m and n designate integers less than or equal to 150, at least one of which is non-zero,
EO and PO respectively designate ethylene oxide and propylene oxide,
R designates a methacrylate or methacrylurethane function, and
R′ designates a hydrogen radical or a methyl radical,
b) 48% to 60% of at least one monomer selected from the group consisting of styrene and (meth)acrylic esters whose ester portion has 1 to 4 carbon atoms,
c) 0.1% to 10% of at least one of acrylic acid and methacrylic acid,
d) 0 to 5% of a monomer whose formula is R-(EO)m-(PO)n-R″, where:
m and n designate integers less than or equal to 150, at least one of which is non-zero,
EO and PO respectively designate ethylene oxide and propylene oxide,
R designates a methacrylate or methacrylurethane function,
R″ designates an alkyl or aryl or alkylaryl group having 8 to 32 linear or branched carbon atoms,
e) 0 to 5% of a monomer comprising two ethylenic unsaturations,
the sum of a), b), c), d), and e) being equal to 100%,
wherein said polymer is non-water-soluble in acid form.

### Claim 12 (depends on 11)

The paper coating composition according to claim 11, wherein the mineral material is selected from the group consisting of natural and synthetic calcium carbonate, kaolin, talc, and mixtures thereof.

### Claim 13 (depends on 11)

The paper coating composition according to claim 11, wherein the binder is selected from the group consisting of water-soluble binders, synthetic latex polymer binders, and mixtures of these binders.

### Claim 14 (depends on 11)

The paper coating composition according to claim 11, comprising 20% to 35% water by weight.

### Claim 15 (depends on 11)

The paper coating composition according to claim 11, wherein the polymer comprises a positive amount of polymerized units of monomer d) of the formula R-(EO)m-(PO)n-R″.

### Claim 16 (depends on 11)

The paper coating composition according to claim 11, wherein the polymer comprises a positive amount of polymerized units of monomer e) comprising two ethylenic unsaturations.

### Claim 17 (depends on 11)

Paper coated with the coating composition of claim 11.

### Claim 18 (depends on 1)

The polymer according to claim 1, wherein b) is at least one monomer selected from (meth)acrylic esters whose ester portion has 1 to 4 carbon atoms.

### Claim 19 (depends on 11)

The paper coating composition according to claim 11, wherein b) is at least one monomer selected from (meth)acrylic esters whose ester portion has 1 to 4 carbon atoms.