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Polymeric composition

A composition, polymer technology, used in the field of plastic lenses, optical polymer compositions and the preparation of such compositions

Active Publication Date: 2009-12-23
SUNCOLOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that it is often desirable to use lead-free solder, and the temperature used to melt the lead-free solder can be around 217°C or higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0142] Dye concentrates were prepared by mixing and grinding the materials listed in Table 14 below:

[0143] Table 14

[0144] Material:

[0145] Additive compositions were prepared by mixing and grinding the above dye concentrates with the materials listed in Table 15:

[0146] Table 15

[0147] Material:

[0148] High molecular weight, low volatility primary antioxidant;

[0149] The polymer compositions shown in Table 16 use APEC TP-0277 polycarbonate resin pellets were prepared with the additive compositions shown in Table 15. The resin pellets were dried in a vacuum oven at 135°C for 4 hours until the water content was below 0.01 wt%. The resin pellets were heated to 135°C, and then the additive composition was added to the resin pellets in a tumbling mixer at a weight ratio of 0.6:99.4. The resin pellets and additive composition were tumble blended for 5 minutes or until the additive composition melted onto and coated the resin p...

Embodiment 2

[0183] The polymer composition of Example 1 was molded into strips of size 1 x 14 x 7 mm. The molded sample was heated up to 260° C. at a rate of 2° C. / min, and Tg was measured by DMTA (Dynamic Mechanical Thermal Analysis) under a load of 1 Hz. This test showed that the molded bars were able to withstand short-term temperature peaks up to 260°C and higher without deformation. see results image 3 .

Embodiment 3

[0185] Four polymer compositions 1-4 having the formulations described in Table 17 were injection molded to prepare LED lenses as described below. The high-temperature optical thermoplastic soldering reflow study was carried out on the LED lens, and the results are listed in Table 18.

[0186] Table 17

[0187]

[0188]

[0189] Table 18

[0190] Composition #1

[0191] (Simulation & Actual Soldering Reflow Temperature Study)

[0192] SR = solder reflow A = anneal R rapid anneal

[0193] S = slow annealed U = no annealed

[0194] test

[0195] / R

[0196] / R

[0197] 32.

[0198] R = rapid annealed part at 217°C for 17 min. S = Slowly annealed parts, ramp over 30 minute intervals, hold at 215°C for 30 minutes, then cool for 30 minutes.

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Abstract

The invention relates to a polymeric composition, comprising: at least one thermoplastic resin having a glass transition temperature of at least about 220 DEG C; inorganic particulates having an average particle size in the range up to about 100 nanometers dispersed in the thermoplastic resin, the inorganic particulates having an index of refraction in the range from about 1.4 to about 3; and an effective amount of at least one dispersant to disperse the inorganic particulates in the thermoplastic resin. The polymer composition may be a high temperature thermoplastic suitable for forming, such as by molding, optical articles such as lenses.

Description

[0001] Pursuant to 35 U.S.C. 35 U.S.C. §119(e), this application claims priority to US Provisional Application 60 / 829158, filed October 12, 2006, and US Provisional Application 60 / 909948, filed April 4, 2007. These applications are hereby incorporated by reference. technical field [0002] The present invention relates to polymer compositions. In particular, the invention relates to optical polymer compositions and methods of making such compositions. The present invention relates to articles, such as plastic lenses, made from these polymer compositions. Background technique [0003] Plastic lenses, glass lenses and silicone lenses generally have the same function in optical systems such as cameras, automotive lighting, military night vision equipment and especially in LEDs (Light Emitting Diodes). The main attributes that differentiate plastic lenses from glass lenses are their lower weight, better impact resistance, and lower cost. However, glass is more stable at very ...

Claims

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Application Information

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IPC IPC(8): G02B1/04C08J5/00C08J3/22C08K3/22C08K13/02
CPCC08K5/0008C08K3/22C08J5/005C08J2369/00C08J3/223B82Y30/00C08K3/013C08K5/0041C08J3/22C08K2003/2227
Inventor 戴维·A.·斯梅塔纳
Owner SUNCOLOR CORP
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