Solid Polyol Benzoates : These six Polyol Benzoates are colorless solids w i t h m e l t points ranging b e t w e e n 46 and 99°C and w i t h t h e exception of Sucrose Benzoate exhibit a tendency t o supercool and recrystallize s l o w l y after being cooled b e l o w t h e melt point. Sucrose Benzoate unlike t h e others is a non-crystalline solid.
© ^ '/ c-o-c-c-o-c-c-o-c-c-o-c H2 H, H 2 H2 H2 H, Triethylene Glycol Dibenzoate
Melting Point 47°C Molecular Weight (theory) 358 Color (liquid) 2 0 0 ΑΡΗ A Refractive Index 50°C (liquid).. 1.5252 Volatility ( m g / h r / c m * ) 347°F 5.0 Availability Commercial
®s .c-ov & Glyceryl Tribenzoate
o
Sucrose Benzoate
Softening Point (Ball and Ring)...98°C Form Non-crystalline flake Molecular Weight (approx.) 1100 Color 60 APHA Refractive Index 25°C 1.5770 Availability Semi-works
/0-cv
CH2V CJH. '. X H /
^ IMeopentylglycol D i b e n z o a t e
Melting Point 71°C Molecular Weight (theory) 404 Color (liquid) 2 0 0 APHA Refractive Index 50°C ( l i q u i d ) . . 1 . 5 5 8 4 Volatility ( m g / h r / c m 2 ) 347°F 0.2 Availability Developmental
Melting Point 49°C Molecular Weight (theory) 312 Color (liquid) 2 0 0 APHA Refractive Index 50°C (liquid).. 1.5298 Volatility ( m g / h r / c m 2 ) 347°F 7.5 Availability Developmental
The tri- a n d tetrabenzoate esters have a m u c h lower t e n d e n c y to volatilize a t high t e m p e r a t u r e s t h a n seen w i t h m o n o m e r plasticizers in this s a m e m o l e c u l a r w e i g h t r a n g e . T h e five c r y s t a l line Polyol B e n z o a t e s a r e c o m p a t i b l e a t low l e v e l s a n d t e n d to b l o o m or c r y s t a l i z e o n a g i n g w h e n a t higher levels in m a n y p o l y m e r s y s t e m s . In c o m b i n a tion w i t h resin s y s t e m s : Dibenzoates a c t as plasticizers w i t h s o f t e n i n g a n d flexibility e f f e c t . Tribenzoates m o d i f y w i t h e f f e c t b e t w e e n plasticizers a n d h a r d resins. Tetrabenzoate a n d Su crose Benzoate serve as h a r d resin w i t h s t i f f e n i n g a n d e m b r i t t l i n g e f f e c t ( m o d e r a t e d if i n c o m b i n a t i o n w i t h a plasticizer).
< ^ , CH2
CH 2
C H ^ ^CH 2
Trimethylolethane Tribenzoate
Pentaerythritol Tetrabenzoate
Melting Point 81°C Molecular Weight 432 Color (liquid) 2 0 0 APHA Refractive Index 50°C ( l i q u i d ) . . 1 . 5 5 3 8 Volatility ( m g / h r / c m 2 ) 347°F 0.3 Availability Developmental
Melting Point 99°C Molecular Weight 552 Color (liquid) 200 APHA Refractive Index 50°C (liquid)..1.5715 Volatility ( m g / h r / c m 2 ) 347°F 0.1 Availability Developmental
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