Higher modulus compositions incorporating particulate rubber

Patent · Sun Jan 01 00:00:00 EST 1995

OSTI ID:869709

McInnis, Edwin L ^[1]; Scharff, Robert P ^[2]; Bauman, Bernard D ^[3]; Williams, Mark A ^[4]

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1. Allentown, PA
2. Louisville, KY
3. Emmaus, PA
4. Souderton, PA

Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a higher flexural modulus than if prepared using an unchlorinated rubber filler or extender. Chlorination of the rubber particles is carried out by contacting the finely divided rubber particles with a chlorine-containing gas comprising at least about 5 volume percent chlorine. Advantageously, the chlorine can be diluted with air, nitrogen or other essentially inert gases and may contain minor amounts of fluorine. Improved performance is obtained with nitrogen dilution of the chlorine gas over air dilution. Improved polymer composite systems having higher flexural modulus result from the use of the chlorinated rubber particles as fillers instead of unchlorinated rubber particles.

• Research Organization: AIR PRODUCTS & CHEMICALS INC
• DOE Contract Number: AC07-88ID12695
• Assignee: Composite Particles, Inc. (Allentown, PA)
• Patent Number(s): US 5382635
• OSTI ID: 869709
• Country of Publication: United States
• Language: English

Related Subjects

modulus
compositions
incorporating
particulate
rubber
particles
fillers
extenders
various
composite
polymer
systems
chlorinated
gas-solid
phase
reaction
chlorine-containing
gas
containing
exhibits
flexural
prepared
unchlorinated
filler
extender
chlorination
carried
contacting
finely
divided
comprising
volume
percent
chlorine
advantageously
diluted
air
nitrogen
essentially
inert
gases
contain
minor
amounts
fluorine
improved
performance
obtained
dilution
result
unchlorinated rubber
chlorinated rubber
inert gases
essentially inert
compositions incorporating
flexural modulus
rubber particles
minor amounts
improved performance
volume percent
inert gas
finely divided
containing gas
solid phase
minor amount
gas comprising
polymer composite
polymer containing
phase reaction
composite polymer
chlorine-containing gas
chlorine gas
rubber fillers
nitrogen dilution
modulus result
rubber filler
various composite
percent chlorine
air dilution
particulate rubber
modulus compositions
incorporating particulate
composite systems
polymer systems
divided rubber
gas-solid phase
extenders exhibits
contain minor
improved polymer
/525/521/