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1. WO1988002013 - COLOR BALANCED RUBBER-REINFORCED PLASTIC

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[ EN ]

CLAIMS

1. A composition comprising a rubber-reinforced plastic composition containing a flame retardant additive, wherein the composition contains 0.001 to 0.1 weight percent of a fadeable, yellow color balancer, said color balancer being an organic dye or pigment and being effective to reduce the overall color shift, ΔE, of the composition upon exposure to
ultraviolet light.

2. A composition as claimed in Claim 1, wherein the overall color shift of the rubber-reinforced plastic will be less than 2.0 ΔE after being subjected to accelerated weathering conditions for 100 hours at 55°C in a Xenon Arc Ci65 Weatherometer, and/or accelerated weathering conditions for 100 hours in a HPUV Indoor Actinic Exposure System.

3. A composition as claimed in Claim 1, wherein the overall color shift of the rubber-reinforced plastic will be less than 1.0 ΔE after being subjected to accelerated weathering conditions for 300 hours at 55°C in a Xenon Arc Ci65 Weatherometer and/or accelerated weathering conditions for 300 hours in a HPUV Indoor Actinic Exposure System.

4. A composition as claimed in Claim 1, wherein the color balancer is an organic dy-e present in an amount of from 0.001 weight percent to 0.02 weight percent.

5. A composition as claimed in Claim 1, wherein the color balancer is an anthraquinone dye.

6. A composition as claimed in Claim 5, wherein the anthraquinone dye is 1,8-bis(phenylthio)-anthraquinone.

7. A composition as claimed in Claim 1, wherein the color balancer is an organic pigment present in an amount of from 0.001 weight percent to 0.05 weight percent.

8. A composition as claimed in Claim 7, wherein the organic pigment is present in an amount of from 0,03 weight percent to 0.05 weight percent.

9. A composition as claimed in Claim 1, further comprising a pigment grade TiO2 in an amount of up to 10 weight percent.

10. A composition as claimed in Claim 1, wherein the flame retardant additive is 1,2-bis(pentabromαphenoxy)ethane and antimony trioxide.

11. A composition as claimed in Claim 1, further comprising a colorant different from the color balancer.

12. A method of reducing the overall color shift, ΔE, of a rubber-reinforced plastic composition containing a flame retardant additive upon exposure to ultraviolet light, said method comprising incorporating into the composition. a fadeable, yellow color balancer, said color balancer being an organic dye or pigment and being present in an amount of from 0.001 to 0.1 weight percent.

13. A method as claimed in Claim 12, wherein the color balancer is added to the composition as part of a pre-match color system or as part of an initial color system.