# US 12,180,412 B2 · Thermally conductive polymer compositions containing carbon black

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- Number: US 12,180,412 B2
- Document ID: US12180412B2
- Status: Granted
- Kind: B2
- Application number: 18/342,863
- Filed: 2023-06-28
- Published: 2023-12-28
- Granted: 2024-12-31
- Earliest claimed: 2016-02-01
- Assignees: Cabot Corporation
- Applicants: Cabot Coporation
- Inventors: Federico Villalpando-Paez; George D. Eid; Alyson M. Christopher; Mark J. Hampden-Smith; Santiague Pierre; Alain Thielen; Limeng Chen; Agathagelos Kyrlidis; Bruce E. MacKay
- Web page: https://patentgrep.com/patent/US12180412B2

## CPC

- C09K 5/14: Solid materials, e.g. powdery or granular
- C08J 3/22: using masterbatch techniques
- C08K 3/04: Carbon
- C08K 3/38: Boron-containing compounds
- C08K 2003/385: {Binary compounds of nitrogen with boron}
- C08K 2201/001: Conductive additives
- C09C 1/48: Carbon black
- C09C 1/56: Treatment of carbon black {; Purification}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- 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)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS}

## Abstract

A composite polymer composition comprising partially crystallized carbon black. The composition exhibits superior thermal transfer properties in plastic formulations. The polymer precursor exhibits excellent rheology when compared to similar compositions comprising traditional carbon blacks. The composite polymers provide for higher loading of more thermally conductive carbon blacks in a variety of composite polymer compositions.

## Claims

### Claim 1

A thermoplastic composite polymer composition comprising:
greater than 50% by weight of a polymer matrix; and
a partially crystallized furnace carbon black dispersed in the polymer matrix at a concentration of from 12 to 28 percent by weight, wherein the carbon black has an OAN structure of greater than 120 cm3/100 g and less than 200 cm3/100 g, a BET surface area of less than 425 m2/g, a surface energy of less than 8 mJ/m2, a percent crystallinity of less than 65% and a Raman microcrystalline planar size (La) of greater than or equal to 28 Å.

### Claim 2 (depends on 1)

The thermoplastic composite polymer composition of claim 1 wherein the partially crystallized furnace carbon black is formed by thermally treating a furnace black at a temperature greater than 700° C. and less than 1800° C.

### Claim 3 (depends on 1)

The thermoplastic composite polymer composition of claim 1 wherein the polymer matrix comprises a copolymer or terpolymer.

### Claim 4 (depends on 1)

The thermoplastic composite polymer composition of claim 1 wherein the polymer matrix comprises a polyolefin, a polystyrene, a polycarbonate, a polyamide, and/or a polyamine.

### Claim 5 (depends on 1)

The thermoplastic composite polymer composition of claim 1 further comprising a non-carbonaceous particle having a thermal conductivity of greater than 30 W/mK.

### Claim 6 (depends on 5)

The thermoplastic composite polymer composition of claim 5 wherein the non-carbonaceous particle is selected from BN, MgO, ZnO, and Al3O2.

### Claim 7 (depends on 6)

The thermoplastic composite polymer composition of claim 6 wherein the non-carbonaceous particle comprises BN, and wherein the volume ratio of partially crystallized carbon black to BN is in the range of 1:1 to 1:10.

### Claim 8 (depends on 1)

The thermoplastic composite polymer composition of claim 1, wherein the thermal conductivity of the thermoplastic composite polymer composition is at least 1.6× greater than the thermal conductivity of the polymer matrix.

### Claim 9 (depends on 1)

The thermoplastic composite polymer composition of claim 1, wherein the partially crystallized furnace carbon black improves a thermal conductivity of the thermoplastic composite polymer composition at least 10% with respect to an untreated carbon black.

### Claim 10 (depends on 1)

A masterbatch comprising the thermoplastic composite polymer composition of claim 1.

### Claim 11 (depends on 1)

A product comprising the composite polymer composition of claim 1, wherein the product is selected from wire and cable jacketing, 3D printed products, automotive parts, and LED casings and fixtures.

### Claim 12

A polymer precursor composition comprising:
greater than 50% by weight of a polymer precursor comprising a polymerizable monomer or oligomer; and
a partially crystallized furnace carbon black dispersed in the monomer or oligomer at a concentration of from 12 to 28 percent by weight, wherein the carbon black has an OAN structure of greater than 120 cm3/100 g and less than 200 cm3/100 g, a BET surface area of less than 425 m2/g, a surface energy of less than 8 mJ/m2 and a Raman microcrystalline planar size (La) of greater than or equal to 28 Å.

### Claim 13 (depends on 12)

The polymer precursor composition of claim 12 wherein the polymer precursor comprises a precursor of a polymer selected from thermoplastic polyolefins (TPO), polyethylene (PE), linear low density (LLDPE), low density (LDPE), medium density (MDPE), high density (HDPE), ultra-high molecular weight (UHMWPE), very low density polyethylene (VLDPE), metallocene medium density polyethylene (mLLDPE), polypropylene, copolymers of polypropylene, ethylene propylene rubber (EPR), ethylene propylene diene terpolymers (EPDM), acrylonitrile butadiene styrene (ABS), acrylonitrile EPDM styrene (AES), styrene-butadiene-styrene (SBS), polyoxymethylene (POM), polyamides (PA) polyvinylchloride (PVC), tetraethylene hexapropylene vinylidenefluoride polymers (THV), perfluoroalkoxy polymers (PFA), polyhexafluoropropylene (HFP), polyketones (PK), ethylene vinyl alcohol (EVOH), copolyesters, polyurethanes (PU), thermoplastic polyurethanes, polystyrene (PS), polycarbonate (PC), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polypheneylene oxide (PPO), polyphenylene ether (PPE), an acrylic, an epoxy, silicone, a phenolic resin, a polyimide, a plastisol, and polyvinyl acetate.

### Claim 14 (depends on 12)

The polymer precursor composition of claim 12, wherein the precursor comprises a precursor of a polyolefin, a polystyrene, a polycarbonate, a polyamide, and/or a polyamine.

### Claim 15 (depends on 12)

The polymer precursor composition of claim 12, further comprising a non-carbonaceous particle having a thermal conductivity of greater than 30 W/mK.

### Claim 16 (depends on 15)

The polymer precursor composition of claim 15, wherein the non-carbonaceous particle is selected from BN, MgO, ZnO, and Al3O2.

### Claim 17 (depends on 16)

The polymer precursor composition of claim 16, wherein the non-carbonaceous particle comprises BN, and wherein the volume ratio of partially crystallized carbon black to BN is in the range of 1:1 to 1:10.

### Claim 18 (depends on 12)

The polymer precursor composition of claim 12, wherein following polymerization, a thermal conductivity of the polymerized polymer precursor composition is at least 1.6× greater than the thermal conductivity of a polymerizate of the polymer precursor.

### Claim 19 (depends on 12)

The polymer precursor composition of claim 12, wherein the partially crystallized furnace carbon black improves a thermal conductivity of a polymerizate of the polymer precursor composition by at least 10% with respect to an untreated carbon black.