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Stability of Low Molecular Weight PPOÒ Resin Solutions

IP.com Disclosure Number: IPCOM000011784D
Publication Date: 2003-Mar-14
Document File: 9 page(s) / 375K

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Abstract

PPOÒ SA120 resin is a new low molecular weight (Mn »2500) polyphenylene-ether (PPE) resin recently commercialized by GE Plastics. In addition to having the well-known properties inherent to PPE, this new resin has an excellent thermal performance (glass transition temperature (Tg) of 165°C) combined with a characteristic feature of improved processability. Replacing the hydroxyl group on SA120 with a reactive methacrylate forms the developmental product PPOÒMX5587 resin. PPOÒMX5587 resin can be used as the building block for films, resin coated copper foils (RCC), adhesives, laminates and many others.

This text was extracted from a Microsoft PowerPoint presentation.
This is the abbreviated version, containing approximately 24% of the total text.

Slide 1 of 9

Stable PPE Solutions

By Amy Freshour and Ming Yin

GE Plastics

February 2003


Slide 2 of 9

Objective: Evaluate effect of several factors on stability of PPE/toluene solutions using a design of experiments (DOE)

Approach: Run DOE in duplicate at facilities in Bergen op Zoom, The Netherlands (BoZ) and in Japan. Test 2 PPE products by GE Plastics: PPO® SA120 and PPO® MX5587

Design: Response Surface, Central Composite, 36 expts per grade

PPE conc.: 10, 25, 40 % (extra experiments of 30% and 35% done in Japan)

Dissolving Temp: 21, 50.5, 80 deg °C

Mixing Time: 1, 2, 3 hrs

Water conc.: 0.03, 0.515, 1 % (based on toluene)

Atmosphere:Air, N2

Responses: time to gel, solution clarity, time to dissolve, and color (limited)

Procedure: Using laboratory grade toluene (0.03% water), place specified amount of toluene in a glass vial. Add a specified amount of water if required. Add the specified amount of PPE. Purge with N2 if required and cap vial. Mix and heat the solution based on the DOE design. After mixing is completed, vials are left to stand at room temperature and observations are recorded over time.

differences: Japan – mixed continuously all solutions with magnetic stir bar in heated water bath; Netherlands – mixed intermittently by hand shaking at 50 °C and 80 °C (temperature controlled by heating block); continuously mixed in a shaker at 21 °C.

PPO® is a Registered Trademark of General Electric Company


Slide 3 of 9

Results: Time to gel

Time to gel is one measurement of solution stability. Gelling indicates that the solution has become so thick that it is no longer pour-able. Gelling is an inherent property of PPE and is a factor of PPE molecular weight and PPE concentration in solution among others. There was a small discrepancy between Japan and BoZ results in that Japan observed that the presence of water effected the gel time, but BoZ did not see this effect.

To show differences in SA120 and MX5587, SA120 is in yellow and MX5587 is in blue, all text in white means the same result for both SA120 and MX5587

Time to gel (0.03% water in toluene)

Time to gel (1% water in toluene)

 

Temperature (°C)

Temperature (°C)

Temperature (°C)

% PPE

21

50.5

80

10

> 3 weeks

N/A

> 3 weeks

25

N/A

> 3 weeks

N/A

30

N/D

6 days, > 8 days

6 days, > 8 days

35

N/D

2 days, 2-3 days

1 day, 2 days

40

N/D

N/A

2 hrs,

4 hrs

 

Temperature (°C)

Temperature (°C)

Temperature (°C)

% PPE

21

50.5

80

10

> 3 weeks

N/A

> 3 weeks

25

N/A

9 days

> 3 weeks

N/A

40

N/D

N/A

< 1 day

4 hrs

N/D = not dissolved; N/A = not available

Results show that SA120 gels faster than MX5587. To prevent gelling, a solution of 25% PPE or less should be used with a low water content in the solvent.


Slide 4 of 9

Results: Solution clarity

In many applications, for example varnish for electronic applications such as resin laminate, resin coated copper foil (RCC) or film, it is critical that a homogeneous solution is maintained. The PPE solutions in this DOE were monitored for turbidity (qua...