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Potential Improvements in Phenolic Resins using PPO® Resin

IP.com Disclosure Number: IPCOM000020297D
Publication Date: 2003-Nov-11

Publishing Venue

The IP.com Prior Art Database

Related People

Hua Guo: CONTACT

Abstract

PPO® SA120 resin is a new low molecular weight (Mn »2500) polyphenylene-ether (PPE) resin recently commercialized by GE Plastics as a polymer additive. 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.

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Slide 1 of 13

x

PPO® Resin in Phenolics

December 15, 2000

Notes

Jack, we’re excited about World Class Engineering and Product Data Management -- let me tell you why.


Slide 2 of 13

Phenolic Resins

The First Commercial Synthetic Polymer (Bakelite - 1910)

   
 
 

OH

Acid +

Excess phenol

[ ] n=3-30

   
 
 

OH

CH2

+ HCHO

Novolac (needs -OH to condense)

(2,2’-dyhidroxydiphenyl methane; 2,4’ & 4,4’ also present)

Base +

Excess aldehyde

Phenol

   
 
 

OH

CH2

   

HOCH2

 

[ ]

Formaldehyde

Resol

(self-condenses)

Almost 100 Years of Chemistry and Applications

[This slide contains 1 picture or other non-text object]


Slide 3 of 13

Phenolic Polymerization Reactions(Trxn ~ 150ºC - 200ºC; Tdec ~ 250ºC)

Novolacs: stable, require crosslinker, emit ammonia

+ N4 (CH2 )6  + NH3

Hexamethylenetetramine

n=3-30 8-15 %

________________________________

Resoles: self condense, less stable

   
 
 

OH

   
 
 

OH

CH2

   

cat

acid

   
 
 

OH

   
 
 

OH

CH2

   

CH2 OH

HOCH2

   

cat

base

+ H2O

Novolacs: Better Reaction Control

Resoles: Less Corrosive


Slide 4 of 13

Thermoset Phenolic Resins

Wide variety of processing and property profiles available by varying...

functionalities of phenol and aldehyde

crosslinker and catalyst

reaction conditions (pH, temperature, etc.)

_________________________________

Performance

AdvantagesDisadvantages

+Thermal Stability- Brittleness

+Dielectric Properties- Color

+Flame Retardance- Volatiles + Exotherm

Linear Oligomers to Thermosets of Varying Functionalities


Slide 5 of 13

Compositions of PPO® Resin and Phenolics

The notable properties of phenolics are similar to those of PPO® resin (aka polyphenylene ether or PPE), since both are phenol based

  high heat

  excellent dielectric properties

  inherent flame retardance

  poor color & odor

So…. What value would would PPO® resin bring as an additive in Phenolics?

PPO® Resin Must Improve Processing, Properties, and/or Cost


Slide 6 of 13

Compositions of PPO® Resin and Phenolics

FACT: o-, p- positions on phenol are active; m- is not

QUESTION: Are 3- and 5- positions on PPE as active as phenolic o- and p-?

 

X

 

X

   
 
 

X

HO\

- CH2-

   
 

/OH

 

X

[ ]

   
 

?

- O-

H3C/

H3C\

-

?


Slide 7 of 13

Compositions of PPO® Resin and Phenolics

IF: PPO® resin is less reactive than phenol novolacs

THEN: adding PPO® resin may:

Decrease crosslink density

Create a tougher polymer

Reduce volatiles and exotherm

BUT: Increase viscosity and oligomer Tg

PPO® Resin Could Improve Novolac Processing and Properties


Slide 8 of 13

Compositions of PPO® Resin and Phenolics for indication purposes

Toughness

Viscosity

Thermoplastic Processing

Brittleness

Volatiles Management

Thermoset Processing

PPE

99%

1%

Phenolic

1%

99%


Slide 9 of 13

Resole

Domestic

Appliance

 
 

Low-priced

Commodity

Novolacs

No Synergy with GEP Resins

 

Phenolics

Molding

Other

Synergy with

GEP Resins

       
   

Electrical

   

Commodities

Automotive

Under Hood

 

Higher Performance

and Price

Commodities

Multiple Applications Approaches


Slide 10 of 13

Anticipated Effect of Adding PPO® Resin

For indication purposes

Need to Solve Miscibility Issues

[This slide conta...