# US 2018/0022892 A1 · Powder mixture comprising organic peroxide

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- Number: US 2018/0022892 A1
- Document ID: US20180022892A1
- Status: Published application
- Kind: A1
- Application number: 15/536,241
- Filed: 2015-12-15
- Published: 2018-01-25
- Earliest claimed: 2014-12-17
- Assignees: Akzo Nobel Chemicals International B.V.
- Applicants: Akzo Nobel Chemicals International B.V.
- Inventors: Maria STEENSMA; Markus Oliver MAJOOR; Martin Hermanus Maria JANSEN; Albert Roland ZUIJDERDUIN; Antonie DEN BRABER
- Web page: https://patentgrep.com/patent/US20180022892A1

## CPC

- C08K 5/14: Peroxides
- C07C 409/34: both belonging to carboxylic acids
- C08F 2/44: Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
- C08J 3/223: {Packed additives}
- C08J 5/121: {by heating}
- C08K 3/013: Fillers, pigments or reinforcing additives
- C08K 3/30: Sulfur-, selenium- or tellurium-containing compounds
- C09D 5/03: Powdery paints
- C09D 7/40: Additives
- C08K 2003/3045: {Sulfates}
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- 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

Powder mixture comprising: −20-90 wt % of one or more powdered organic peroxides and −10-80 wt % of one or more powdered filler materials, at least 60 wt % thereof being barium sulphate.

## Claims

### Claim 1

Powder mixture comprising:
20-90 wt % of one or more powdered organic peroxides and
10-80 wt % of one or more powdered filler materials, at least 60 wt % thereof being barium sulphate.

### Claim 2 (depends on 1)

Powder mixture according to claim 1 wherein the powder mixture comprises 1-30 wt % of water.

### Claim 3 (depends on 1)

Powder mixture according to claim 1 wherein the organic peroxide is selected from the group consisting of dibenzoyl peroxide, substituted dibenzoyl peroxides, di (tert-butylperoxyisopropyl)benzene, dicumyl peroxide, di(dichlorobenzoyl)peroxides, diisopropyl peroxydicarbonate, di(t-butylcyclohexyl)peroxydicarbonate, dicetyl peroxydicarbonate, dimyristyl peroxydicarbonate, and didecanoyl peroxide.

### Claim 4 (depends on 3)

Powder mixture according to claim 3 wherein the organic peroxide is selected from the group consisting of dibenzoyl peroxide and substituted dibenzoyl peroxides.

### Claim 5 (depends on 4)

Powder mixture according to claim 4 wherein the organic peroxide is di(4-methylbenzoyl) peroxide.

### Claim 6 (depends on 1)

Powder mixture according to claim 1 wherein barium sulphate contains primary particles with an average particle size (d50) in the range 0.5-3 microns.

### Claim 7 (depends on 1)

Process for the preparation of a powder mixture according to claim 1 wherein 20-90 wt % of one or more powdered organic peroxides and 10-80 wt % of one or more powdered filler materials, at least 60 wt % thereof being barium sulphate, are homogenized and de-agglomerated until an average particle diameter (d50) below 200 microns is reached.

### Claim 8 (depends on 7)

Process according to claim 7 wherein the powdered organic peroxide contains 5-70 wt % of water.

### Claim 9 (depends on 7)

Process according to claim 7 wherein the organic peroxide is selected from the group consisting of dibenzoyl peroxide, substituted dibenzoyl peroxides, di(tert-butylperoxyisopropyl)benzene, dicumyl peroxide, di(dichlorobenzoyl)peroxides, diisopropyl peroxydicarbonate, di (t-butylcyclohexyl)peroxydicarbonate, dicetyl peroxydicarbonate, dimyristyl peroxydicarbonate, and didecanoyl peroxide.

### Claim 10 (depends on 9)

Process according to claim 9 wherein the organic peroxide is selected from the group consisting of dibenzoyl peroxide and substituted dibenzoyl peroxides.

### Claim 11 (depends on 10)

Process according to claim 10 wherein the organic peroxide is di(4-methylbenzoyl) peroxide.

### Claim 12 (depends on 1)

Coating composition comprising the powder mixture according to claim 1.

### Claim 13 (depends on 1)

A method of curing a radically curable thermosetting resin comprising the step of curing the radically curable thermosetting resin with the powder mixture of claim 1.

### Claim 14 (depends on 1)

A method of curing a coating composition comprising the step of curing the coating composition with the powder mixture of claim 1.

### Claim 15 (depends on 1)

A method for radical polymerization process comprising the step of initiating the radical polymerization with the powder mixture of claim 1.