Patent ID: 7812096

Claim:
A method for modifying a polymer comprising: (i) as a first step, reacting a polymer (A), a compound (B) having a nitroxide radical in the molecule thereof and a radical initiator (C), in a non-solvent system in a mixer, whereby the component (B) is grafted to the polymer (A) to thereby obtain the grafted polymer (A) grafted with the component (B) and then to thereby obtain the grafted polymer (A) grafted with the component (D) (ii) as a second step, reacting the resultant grafted polymer (A) with a radical polymerizable monomer (D) in a mixer to thereby further graft the monomer (D) to the polymer (A), whereby the resultant further grafted polymer (A) has an improved bondability to an inorganic material, an improved wettability with a filler or an improved compatibility with a polymer having a high or low polarity.