High heat polycarbonate compositions

Patent metadata

Field	Value
Publication number	US-10273357-B2
Application number	US-201515302508-A
Country	US
Kind code	B2
Filing date	Apr 15, 2015
Priority date	Apr 15, 2014
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

Polycarbonate blend compositions are disclosed. The compositions include at least one polycarbonate useful for high heat applications. The compositions can include one or more additional polymers. The compositions can include one or more additives. The compositions can be used to prepare articles of manufacture, and in particular, automotive bezels.

First claim

What is claimed is:

1. A metallized article comprising a metallized surface formed on an article formed from a thermoplastic composition comprising:
(a) 60 to 70 wt. % of a first polycarbonate that includes structural units derived from at least one of:

wherein R a and R b at each occurrence are each independently halogen, C 1 -C 12 alkyl, C 1 -C 12 alkenyl, C 3 -C 8 cycloalkyl, or C 1 -C 12 alkoxy; p and q at each occurrence are each independently 0 to 4; R 13 at each occurrence is independently a halogen or a C 1 -C 6 alkyl group; c at each occurrence is independently 0 to 4; R 14 at each occurrence is independently a C 1 -C 6 alkyl, phenyl, or phenyl substituted with up to five halogens or C 1 -C 6 alkyl groups; R g at each occurrence is independently C 1 -C 12 alkyl or halogen, or two R g groups together with the carbon atoms to which they are attached form a four-, five, or six-membered cycloalkyl group; t is 0 to 10; and x:y is 1:99 to 99:1;
(b) 15 to 40 wt. % of a second polycarbonate that is a BPA polycarbonate having a Mw of 17,000 g/mol [ ± 1,000 g/mol] to 24,000 g/mol [ ± 1,000 g/mol], as determined by GPC using BPA polycarbonate standards;
(c) 0.1 to 2 wt. % of a hydroxyl-functionalized flow promoter; the hydroxyl-functionalized flow promoter comprising an alkylene glycol, a polyalkylene glycol, tri(hydroxymethyl)aminomethan (“THAM”), sorbitol, sucrose, fructose, glucose, glyceryl monostearate (“GMS”), 1,4-dihydroxybenzene, 2,2-bis(4-hydroxyphenyl)propane, 1,1,1-trishydroxy phenyl ethane (THPE), bisphenol acetophenone (BisAP), 1,1-bis(4-hydroxy-3-methylphenyl)cyclohexane (DMBPC), 4,4′-(3,3,5-trimethylcyclohexane-1,1-diyl)diphenol (BPI), paracumyl phenol (PCP), 3,3-bis(4-hydroxyphenyl)-2-phenylisoindolin-1-one (PPPBP), or a polycarbonate homo-polymer or co-polymer having an aryl hydroxy end-group content of greater than 350 ppm;
(d) 15 to 25 wt. % of a third polycarbonate that is a BPA polycarbonate having a Mw of 26,000 g/mol [ ± 1,000 g/mol] to 30,000 g/mol [ ± 1,000 g/mol], as determined by GPC using BPA polycarbonate standards; provided the third polycarbonate is different from the second polycarbonate; and
(e) optionally a fourth polycarbonate that is a BPA polycarbonate-polydimethylsiloxane copolymer comprising 5 wt % to 25 wt % siloxane, having an average polydimethylsiloxane block length of 30 to 100 units, provided that the combined wt % value of all components does not exceed 100 wt %;
wherein the composition has a heat deflection temperature of at least 140° C., measured at 0.45 MPa in accordance with ISO 75;
wherein the composition has a melt viscosity of less than 350 Pa·s, measured in accordance with ISO 11443 at 300° C. at a shear rate of 1500 s −1 ; and
wherein the article has one or more of the following properties:
a minimum haze onset temperature of 150° C.;
achieves a GT0 metal adhesion rating when measured in accordance with ASTM 3359/ISO 2409; and
exhibits 0% corrosion when stored for 240 hours at 98% relative humidity at 40° C., in accordance with DIN 50017.

2. The article of claim 1 , wherein the first polycarbonate comprises at least 18 mol % structural units derived from BPA, and has a Tg of at least 170° C.

3. The article of claim 1 , wherein the first polycarbonate comprises 31 mol % to 35 mol % structural units derived from PPPBP; and has a Mw of 15,500 g/mol [ ± 1,000 g/mol] to 40,000 g/mol [ ± 1,000 g/mol], as determined by GPC using BPA polycarbonate standards.

4. The article of claim 1 , wherein the hydroxyl-functionalized flow promoter is a bis-hydroxyl-functionalized structure.

5. The article of claim 1 , wherein the hydroxyl-functionalized flow promoter is ethylene glycol, propylene glycol, polyethylene glycol, poly(1,4-butylene) glycol, block or random poly (ethylene glycol)-co-(propylene glycol) copolymer, a polyalkylene glycol having a Mw of up to 36,000 g/mol [ ± 1,000 g/mol], a polyethylene glycol (PEG) having a Mw of 3,350 g/mol [ ± 1,000 g/mol], a PEG having a Mw of 10,000 g/mol [ ± 1,000 g/mol], a PEG having a Mw of 35,000 g/mol [ ± 1,000 g/mol], or a polypropylene glycol (PPG) having a Mw of 2,000 g/mol [ ± 1,000 g/mol].

6. The article of claim 1 , wherein the fourth polycarbonate is
a PCP end-capped BPA polycarbonate-polydimethylsiloxane copolymer comprising 6 wt % siloxane, having an average polydimethylsiloxane block length of 45 units; or
a PCP end-capped BPA polycarbonate-polydimethylsiloxane copolymer comprising 20 wt % siloxane, having an average polydimethylsiloxane block length of 45 units;
wherein the fourth polycarbonate has a Mw of 23,000 g/mol [ ± 1,000 g/mol] to 30,000 g/mol [ ± 1,000 g/mol], as determined by GPC using BPA polycarbonate standards.

7. The article of claim 1 , wherein a molded sample of the composition has at least 80% ductility in a multi-axial impact test at 23° C., measured in accordance with ISO 6603; wherein the composition has a heat deflection temperature of at least 155° C., measured at 0.45 MPa in accordance with ISO 75; wherein the composition has a melt viscosity of less than 310 Pa·s measured in accordance with ISO 11443 at 300° C. at a shear rate of 1,500 s −1 ; or wherein the composition has a notched Izod impact strength (NII) of at least 8 kJ/m 2 at 23° C., measured in accordance with ISO 180.

8. The article of claim 1 , wherein the article is a plaque having thickness of 3.0 mm plaque comprising the composition, metallized with a 100 nm to 150 nm thick aluminum layer using a physical vapor deposition process, and protected with a plasma-deposited siloxane hard-coat of 50 nm has a minimum haze onset temperature of 165° C.; wherein the plaque achieves a GT0 metal adhesion rating when measured in accordance with ASTM 3359/ISO 2409; or wherein the plaque exhibits 0% corrosion when stored for 240 hours at 98% relative humidity at 40° C., in accordance with DIN 50017.

9. The article of claim 1 , wherein the article is a plaque having a thickness of 1.5 mm comprising the composition, metallized with a 100 nm to 150 nm thick aluminum layer using a physical vapor deposition process, and protected with a plasma-deposited siloxane hard-coat of 50 nm, has a minimum haze onset temperature of 155° C.

10. The article of claim 9 , wherein the plaque has a minimum haze onset temperature of 160° C.; wherein the plaque achieves a GT0 metal adhesion rating when measured in accordance with ASTM 3359/ISO 2409; wherein the plaque exhibits 0% corrosion when stored for 120 hours at 98% relative humidity at 40° C., in accordance with DIN 50017; or wherein the plaque exhibits 0% corrosion when stored for 240 hours at 98% relative humidity at 40° C., in accordance with DIN 50017.

11. The article of claim 1 , wherein the composition comprises 5 wt % to 35 wt % filler.

12. The article of claim 1 , wherein a metallized part comprising the composition has an L* of 20 or less or 15 or less, when measured using a spectrophotometer in reflection mode with specular light excluded.

13. The article of claim 1 , selected from instrument panels, overhead consoles, interior trim, center consoles, panels, quarter panels, rocker panels, trim, fenders, doors, deck lids, trunk lids, hoods, bonnets, roofs, bumpers, fascia, grilles, minor housings, pillar appliqués, cladding, body side moldings, wheel covers, hubcaps, door handles, spoilers, window frames, headlamp bezels, headlamps, tail lamps, tail lamp housing

Assignees

• Sabic Global Technologies Bv

Inventors

• Grieshaber Sarah E
• Farrell Tony
• Boonman Rob
• Steendam Wilhelmus Johannes Daniel
• Diez Diaz Maria Del Mar
• Van De Grampel Robert Dirk
• Forey Natacha
• Van Nispen Sjoerd

Classifications

• C08L69/00 Primary

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08L2205/06

  having improved processability or containing aids for moulding methods · CPC title

• C08L83/10

  Block- or graft-copolymers containing polysiloxane sequences (obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00) · CPC title

• C08K5/053

  Polyhydroxylic alcohols · CPC title