Rubber toughened thermoplastic resin nano composites
AssigneeExxon Chemical Patents Inc.
InventorsDongming Li, Dennis George Peiffer, Chester W. Elspass, Hsien-Chang Wang
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Abstract
Toughened nanocomposite materials are prepared based on a blend of one or more thermoplastic engineering resins, e.g., nylon, a functionalized, e.g. brominated, copolymer of a C.sub.4 -C.sub.7 isomonoolefin, e.g. isobutylene, and a para-alkylstyrene, e.g. para-methylstyrene, and further contain a uniformly dispersed exfoliated phyllosilicate layered clay, e.g., montmorillonite. The nanocomposite materials exhibit superior mechanical properties, including enhanced impact strength.
Claims12
A thermoplastic polymer nanocomposite composition comprising a blend of:
- a) at least one thermoplastic engineering resin;
- b) an elastomeric functionalized copolymer of a C.sub.4 to C.sub.7 isomonoolefin containing up to about 20 mole % of the following aromatic monomer units randomly spaced along the polymer chain:
- wherein R and R.sup.1 are independently hydrogen, C.sub.1 to C.sub.4 alkyl or primary or secondary alkyl halides and X is a functional group selected from the group consisting of halogen;
- carboxy acids;
- carboxy salts;
- carboxy esters, amides and imides;
- hydroxy;
- alkoxide;
- phenoxide;
- thiolate;
- thioether;
- xanthate;
- cyanide;
- cyanate;
- amino and mixtures thereof, and
- c) an exfoliated phyllosilicate clay, having cationic surfactants, dispersed in said composition, wherein said clay is present in said composition at a level of from about 0.5 to 10 wt %, based on the polymer content of said blend.
A thermoplastic polymer nanocomposite composition comprising a blend of:
- a) at least one polyamide;
- b) an elastomeric functionalized copolymer of a C.sub.4 to C.sub.7 isomonoolefin containing up to about 20 mole % of the following aromatic monomer units randomly spaced along the polymer chain:
- wherein R and R.sup.1 are independently hydrogen, C.sub.1 to C.sub.4 alkyl or primary or secondary alkyl halides and X is a functional group selected from the group consisting of halogen;
- carboxy acids;
- carboxy salts;
- carboxy esters, amides and imides;
- hydroxy;
- alkoxide;
- phenoxide;
- thiolate;
- thioether;
- xanthate;
- cyanide;
- cyanate;
- amino and mixtures thereof;
- and
- c) one or more layers of an exfoliated phyllosilicate clay, having cationic surfactants, dispersed in said composition, the layers spaced at distances greater than 4 .ANG. and intercalated with one or more swelling agents;
- wherein said clay is present in said composition at a level of from about 0.5 to 10 wt %, based on the polymer content of said blend.
Dependencies are inferred from the claim text.