# US 10,767,049 B2 · Liquid crystalline polymer composition for camera modules

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- Number: US 10,767,049 B2
- Document ID: US10767049B2
- Status: Granted
- Kind: B2
- Application number: 16/166,259
- Filed: 2018-10-22
- Published: 2019-05-30
- Granted: 2020-09-08
- Earliest claimed: 2015-08-17
- Assignees: Ticona LLC
- Applicants: Ticona LLC
- Inventors: Young Shin Kim
- Web page: https://patentgrep.com/patent/US10767049B2

## CPC

- C08L 77/12: Polyester-amides
- C08K 3/30: Sulfur-, selenium- or tellurium-containing compounds
- C08L 23/0884: Epoxide-containing esters
- C08L 33/14: of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
- C08L 63/00: Compositions of epoxy resins; Compositions of derivatives of epoxy resins
- H01B 1/122: {Ionic conductors}
- H04N 23/51: Housings
- H04N 23/57: Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A polymer composition that is capable of exhibiting a unique combination of ductility (e.g., tensile elongation at break), impact strength (e.g., Charpy notched impact strength), and dimensional stability is provided. For example, the polymer composition may contain a liquid crystalline polymer in combination with an epoxy-functionalized olefin copolymer and an inorganic particulate material.

## Claims

### Claim 1

A camera module comprising a polymer composition that comprises a liquid crystalline polymer, an inorganic particulate material having a hardness value of about 2.5 or more based on the Mohs hardness scale and a median particle size of from about 0.1 to about 35 micrometers, and an epoxy-functionalized olefin copolymer, wherein the polymer composition exhibits a tensile elongation at break of about 3.5% or more, as determined in accordance with ISO Test No. 527:2012 at 23° C.

### Claim 2 (depends on 1)

The camera module of claim 1, wherein liquid crystalline polymers constitute from about 20 wt. % to about 80 wt. % of the polymer composition.

### Claim 3 (depends on 1)

The camera module of claim 1, wherein the liquid crystalline polymer comprises repeating units derived from terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 4-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, hydroquinone, 4,4′-biphenol, acetaminophen, or a combination thereof.

### Claim 4 (depends on 1)

The camera module of claim 1, wherein the inorganic particulate material comprises calcium sulfate, barium sulfate, or a combination thereof.

### Claim 5 (depends on 1)

The camera module of claim 1, wherein the inorganic particulate material constitutes from about 20 wt. % to about 60 wt. % of the polymer composition and the epoxy-functionalized copolymer constitutes from about 1 wt. % to about 20 wt. % of the polymer composition.

### Claim 6 (depends on 1)

The camera module of claim 1, wherein the epoxy-functionalized olefin copolymer contains an ethylene monomeric unit and an epoxy-functional (meth)acrylic monomeric component.

### Claim 7 (depends on 6)

The camera module of claim 6, wherein the epoxy-functional (meth)acrylic monomeric component is derived from glycidyl acrylate, glycidyl methacrylate, or a combination thereof.

### Claim 8 (depends on 6)

The camera module of claim 6, wherein the epoxy-functional (meth)acrylic monomeric unit constitutes from about 1 wt. % to about 20 wt. % of the copolymer.

### Claim 9 (depends on 6)

The camera module of claim 6, wherein the epoxy-functionalized olefin copolymer also contains a (meth)acrylic monomeric unit that is not epoxy-functional.

### Claim 10 (depends on 1)

The camera module of claim 1, wherein the epoxy-functionalized olefin copolymer exhibits a melt flow rate of from about 1 to about 30 grams per 10 minutes, as determined in accordance with ASTM D1238-13 at a load of 2.16 kg and temperature of 190° C.

### Claim 11 (depends on 1)

The camera module of claim 1, wherein the epoxy-functionalized olefin polymer is poly(ethylene-co-butylacrylate-co-glycidyl methacrylate).

### Claim 12 (depends on 1)

The camera module of claim 1, wherein the polymer composition further comprises an electrically conductive filler.

### Claim 13 (depends on 12)

The camera module of claim 12, wherein the electrically conductive filler includes an ionic liquid.

### Claim 14 (depends on 1)

The camera module of claim 1, wherein the polymer composition contains no more than about 10 wt. % of fibrous fillers.

### Claim 15 (depends on 1)

The camera module of claim 1, wherein the composition exhibits a Charpy notched impact strength of about 6 kJ/m2 or more, as determined in accordance with ISO Test No. 179-1:2010 at 23° C.

### Claim 16 (depends on 1)

The camera module of claim 1, wherein the composition exhibits a dimensional stability of about 6 or less as determined in accordance with ISO 294-4:2001 using a Type D2 specimen.

### Claim 17 (depends on 1)

The camera module of claim 1, wherein the inorganic particulate material is present in the polymer composition in an amount of from about 50 to about 90 parts by weight per 100 parts by weight of liquid crystalline polymers and the epoxy-functionalized olefin copolymer is present in the polymer composition in an amount of from about 1 to about 15 parts by weight per 100 parts by weight of liquid crystalline polymers.

### Claim 18

A camera module comprising a polymer composition that includes a liquid crystalline polymer, an inorganic particulate material having a hardness value of about 2.5 or more based on the Mohs hardness scale and a median particle size of from about 0.1 to about 35 micrometers, and an epoxy-functionalized olefin copolymer, wherein the composition exhibits a tensile elongation at break of about 3.5% or more as determined in accordance with ISO Test No. 527:2012 at 23° C., a Charpy notched impact strength of about 6 kJ/m2 or more as determined in accordance with ISO Test No. 179-1:2010 at 23° C., and a dimensional stability of about 6 or less as determined in accordance with ISO 294-4:2001 using a Type D2 specimen.

### Claim 19 (depends on 18)

The camera module of claim 18, wherein the liquid crystalline polymer comprises repeating units derived from terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 4-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, hydroquinone, 4,4′-biphenol, acetaminophen, or a combination thereof.

### Claim 20 (depends on 18)

The camera module of claim 18, wherein the inorganic particulate material comprises calcium sulfate, barium sulfate, or a combination thereof.

### Claim 21 (depends on 18)

The camera module of claim 18, wherein the epoxy-functionalized olefin copolymer contains an ethylene monomeric unit and an epoxy-functional (meth)acrylic monomeric component.

### Claim 22 (depends on 18)

The camera module of claim 18, wherein the epoxy-functionalized olefin polymer is poly(ethylene-co-butylacrylate-co-glycidyl methacrylate).

### Claim 23 (depends on 18)

The camera module of claim 18, wherein the polymer composition further comprises an electrically conductive filler.

### Claim 24 (depends on 23)

The camera module of claim 23, wherein the electrically conductive filler includes an ionic liquid.

### Claim 25 (depends on 18)

The camera module of claim 18, wherein the polymer composition contains no more than about 10 wt. % of fibrous fillers.

### Claim 26 (depends on 18)

The camera module of claim 18, wherein the inorganic particulate material is present in the polymer composition in an amount of from about 50 to about 90 parts by weight per 100 parts by weight of liquid crystalline polymers and the epoxy-functionalized olefin copolymer is present in the polymer composition in an amount of from about 1 to about 15 parts by weight per 100 parts by weight of liquid crystalline polymers.