Colored cross-linkable polycarbonate compositions

Patent metadata

Field	Value
Publication number	US-10017622-B2
Application number	US-201515321404-A
Country	US
Kind code	B2
Filing date	Sep 15, 2015
Priority date	Sep 17, 2014
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

Polymeric compositions having improved flame retardance properties are disclosed. The compositions comprise a cross-linkable polycarbonate resin having a photoactive group derived from a dihydroxybenzophenone, and also include a colorant. Certain colorant packages lead to an unexpected increase in crosslinking.

First claim

The invention claimed is:

1. A polymeric composition, comprising: a cross-linkable polycarbonate resin containing a photoactive group derived from a benzophenone; and a colorant,
wherein the colorant is selected so that when a chip having a thickness of 2.54 mm is made from the polymeric composition, and exposed to 36 J/cm 2 of UVA light on each side, the increase in weight-average molecular weight after 48 hours is 1000 or more than the increase in weight-average molecular weight of a chip having the same thickness and made from the same composition without the colorant after exposing to 36 J/cm 2 of UVA light on each side for 48 hours; and
wherein the colorant is present in an amount of about 0.00005 phr to about 2 phr.

2. The composition of claim 1 , wherein the colorant is selected from the group consisting of C.I. Pigment White 6, C.I. Pigment Black 7, C.I. Solvent Violet 36, C.I. Pigment Blue 60, C.I Solvent Red 135, C.I. Pigment Blue 29, C.I Pigment Blue 15:4, C.I. Solvent Orange 63, C.I Pigment Brown 24, C.I Solvent Green 3, C.I. Solvent Violet 13, C.I. Solvent Yellow 93, and combinations thereof.

3. The composition of claim 1 , wherein the colorant is a combination of C.I Solvent Red 135, C.I. Solvent Green 3, C.I. Solvent Violet 13, and C.I. Solvent Yellow 93, each individual colorant being present in the amount of about 0.2 to about 0.5 phr.

4. The composition of claim 1 , wherein an article formed therefrom has a black color as denoted by an L* of less than 30.

5. The composition of claim 1 , wherein the colorant is selected so that when a chip having a thickness of 2.54 mm is made from the polymeric composition, and exposed to 36 J/cm 2 of UVA light on each side, the gel thickness after 48 hours is at least twice the gel thickness after 48 hours of a chip made from the same composition without the colorant.

6. The composition of claim 1 , wherein the colorant is a combination of C.I Solvent Violet 36 and Pigment Blue 60, each individual colorant being present in the amount of about 0.00005 to about 0.0010 phr.

7. The composition of claim 1 , further comprising a polymeric base resin.

8. The composition of claim 7 , wherein the weight ratio of the cross-linkable polycarbonate resin to the polymeric base resin is from about 25:75 to about 50:50.

9. The composition of claim 1 , wherein the cross-linkable polycarbonate resin is formed from a reaction of: a dihydroxybenzophenone; a first dihydroxy chain extender; and a carbonate precursor.

10. The composition of claim 9 , wherein the cross-linkable polycarbonate resin contains from about 0.5 mole % to about 50 mole % of repeating units derived from the dihydroxybenzophenone.

11. The composition of claim 9 , wherein the dihydroxybenzophenone is 4,4′-hydroxybenzophenone; and the first dihydroxy chain extender is bisphenol-A.

12. The composition of claim 9 , wherein the cross-linkable polycarbonate resin has a weight average molecular weight of 15,000 to about 35,000.

13. An article formed from the composition of claim 1 .

14. The article of claim 13 , wherein the article is a molded article, a film, a sheet, a layer of a multilayer film, or a layer of a multilayer sheet, or is at least one of an automotive bumper, an automotive exterior component, an automobile mirror housing, an automobile grille, an automobile pillar, an automobile wheel cover, an automobile instrument panel or trim, an automobile glove box, an automobile door hardware or other interior trim, an automobile exterior light, an automobile part within the engine compartment, an agricultural tractor or device part, a construction equipment vehicle or device part, a construction or agricultural equipment grille, a marine or personal water craft part, an all-terrain vehicle or all-terrain vehicle part, plumbing equipment, a valve or pump, an air conditioning heating or cooling part, a furnace or heat pump part, a computer part, a computer router, a desk top printer, a large office/industrial printer, an electronics part, a projector part, an electronic display part, a copier part, a scanner part, an electronic printer toner cartridge, a hair drier, an iron, a coffee maker, a toaster, a washing machine or washing machine part, a microwave, an oven, a power tool, an electric component, an electric enclosure, a lighting part, a dental instrument, a medical instrument, a medical or dental lighting part, an aircraft part, a train or rail part, a seating component, a sidewall, a ceiling part, cookware, a medical instrument tray, an animal cage, fibers, a laser welded medical device, fiber optics, a lense (auto and non-auto), a cell phone part, a greenhouse component, a sun room component, a fire helmet, a safety shield, safety glasses, a gas pump part, a humidifier housing, a thermostat control housing, an air conditioner drain pan, an outdoor cabinet, a telecom enclosure or infrastructure, a Simple Network Detection System (SNIDS) device, a network interface device, a smoke detector, a component or device in a plenum space, a medical scanner, X-ray equipment, a construction or agricultural equipment, a hand held electronic device enclosure or part, a walkie-talkie enclosure or part, a scanner enclosure or part, a media/MP3/MP4 player enclosure or part, a radio enclosure or part, a GPS system enclosure or part, an ebook enclosure or part, a tablet enclosure or part, a wearable electronic device, a smart watch, a wearable training/tracking device, a wearable activity/sleep monitoring system, a wearable electronic wristband, electronic glasses, a hand held tool enclosure or part, a smart phone enclosure or part, and a turbine blade.

15. The article of claim 13 , wherein the article is formed by injection molding, overmolding, co-injection molding, extrusion, multilayer extrusion, rotational molding, blow molding, or thermoforming.

16. The article of claim 13 , wherein the article has a shift in b-value of less than 8 after exposure to UV radiation.

17. A process for making a cross-linked colored article, comprising:
providing the polymeric composition of claim 1 ; molding the polymeric composition into an article, or coating an article with the polymeric composition; and
exposing the molded article or coated article to UV radiation to affect crosslinking of the polymeric composition and obtain the colored article.

18. The process of claim 17 , wherein the article is exposed to a dosage of at least 2 J/cm 2 of UVA radiation.

19. The composition of claim 1 , wherein the colorant comprises one or more of the following: C.I. Pigment White 6, C.I. Pigment Black 7, C.I. Solvent Violet 36, C.I Solvent Red 135, C.I. Pigment Blue 29, C.I. Solvent Orange 63, C.I Solvent Green 3, C.I. Solvent Violet 13, or C.I. Solvent Yellow 93.

Assignees

• Sabic Global Technologies Bv

Inventors

• Flores Amanda Marie
• Gandhi Kaushal

Classifications

• B29C45/0001

  characterised by the choice of material · CPC title

• B29K2069/00

  Use of PC, i.e. polycarbonates {or derivatives thereof}, as moulding material · CPC title

• C08K3/013 Primary

  Fillers, pigments or reinforcing additives · CPC title

• C08J2369/00

  Characterised by the use of polycarbonates; Derivatives of polycarbonates · CPC title

• C08K5/0041

  Optical brightening agents, organic pigments · CPC title