Patent ID: 8791209

Claim:
A method for producing modified natural rubber particle having carbon-carbon double bonds of vinyl structures assigned to multifunctional vinyl monomers as a source for graft-copolymerization on a surface of the modified natural rubber particle, comprising: graft-copolymerizing at least one multifunctional vinyl monomer having two or more carbon-carbon double bonds of vinyl structures, none of the carbon-carbon double bonds being protected by cyclodextrins, at least one of the carbon-carbon double bonds being distinguished in reactivity from the other carbon-carbon double bonds, and selected from the group consisting of 3-acryloyloxy-2-hydroxypropyl methacrylate, glycidyl undecylate methacrylic acid-adduct, allyloxy polyethylene glycol-polypropylene glycol mono(meth)acrylates, allyloxy polyalkylene glycol mono(meth)acrylates, allyloxy polyalkyl alcohol mono(meth)acrylates, (vinylphenyl)allylalkanes, and (vinylphenyl)allylalkylene glycols, onto natural rubber particles or deproteinized natural rubber particles.