Patent ID: 8828542

Claim:
An isolated nanoparticle for preventing volume shrinkage during a polymerization reaction, comprising: a core; and one or more un-polymerized, polymerizable moieties linked to the core, said un-polymerized, polymerizable moieties of the isolated nanoparticle being configured for undergoing a polymerization reaction when the isolated nanoparticle is added to a polymerizable composition, wherein the polymerizable composition includes monomers, dendrimers, oligomers or polymers that are capable of participating in the polymerization reaction with the one or more un-polymerized, polymerizable moieties linked to the core, wherein the un-polymerized, polymerizable moieties are represented by -L-X—Y wherein L represents an alkylene, alkenylene, alkynylene, alkylene oxide, —(CH2) λ —O—(CH2) m —; X represents a single bond, —O—, —O—(CH2) q —, —O—C(═O)—, —C(═O)—O—, —O—T— or —O—T—C(═O)—; Y represents —P or —CH (3-n) P n ; where T represents arylene, P represents a reactive moiety, λ and m independently represent 1 to 20, q represents 1 to 10 and n represents 1 to 3.