Polyether-polysiloxane crosslinked rubber spherical particle, method for manufacturing the same, polyether-polysiloxane crosslinked composite particle, and method for manufacturing the same

A polyether-polysiloxane crosslinked rubber spherical particle comprising an addition-reaction product of a composition comprising:

• (A) a polyether having at least two aliphatic unsaturated groups in one molecule, the polyether being a polypropylene glycol having the aliphatic unsaturated groups in both terminal moieties in one molecule;
• (B) an organohydrogenpolysiloxane shown by the following general formula (1),
• wherein 0<l≤1000, 2≤m≤1000, 0≤n≤1000,
• R1 independently represents a hydrogen atom, a monovalent hydrocarbon group having 1 to 12 carbon atoms that is unsubstituted or is substituted with a halogen atom, or an alkoxy group, and R2 independently represents a monovalent hydrocarbon group having 1 to 20 carbon atoms,
• the organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in one molecule;
• and
• (C) a hydrosilylation-reaction catalyst, and
• wherein the component (B) is a phenylorganohydrogenpolysiloxane having a value of a solubility parameter Δ of at least 7.5, and satisfying the following inequality (3), the solubility parameter Δ being shown by the following equality (2):
• Δ=ρΣF/M (2)
• wherein “ρ” is a specific weight of the organohydrogenpolysiloxane, F is a molecular cohesive energy constant ((cal·cm3)1/2/mol) of atoms and functional groups, and M is a molecular weight of the organohydrogenpolysiloxane,
• (l/l+m+n+2)×100>10 (3);
• excluding a combination where two of the aliphatic unsaturated groups are present in the component (A) in one molecule and two of the silicon-bonded hydrogen atoms are present in the component (B) in one molecule.