Method for preparing of weatherability thermoplastic resin

A weatherable thermoplastic resin prepared by a method comprising:

• preparing a seed, including:
• adding about 0.05 weight parts to about 0.2 weight parts of a water-soluble initiator to about 0.5 weight parts to about 10 weight parts of either an aromatic vinyl compound or a (meth)acrylic acid alkyl ester, to obtain a first compound;
• and
• performing polymerization with respect to the first compound;
• preparing an alkyl acrylate rubber polymer, including:
• adding about 5 weight parts to about 45 weight parts of an alkyl acrylate monomer;
• about 1 weight part to about 5 weight parts of the aromatic vinyl compound, (meth)alkyl methacrylate, or a vinyl cyanide compound;
• about 0.2 weight parts to about 1.0 weight part of a metal salt derivative of alkyl sulfosuccinate with C12˜C18, an alkyl sulfuric acid ester with C12˜C20, or a metal sulfonate, as a first emulsifier;
• and about 0.05 weight parts to about 0.2 weight parts of an oil-soluble initiator, to the seed, to obtain a second compound;
• and
• performing polymerization with respect to the second compound;
• and
• preparing a graft copolymer, including:
• adding about 10 weight parts to about 40 weight parts of the aromatic vinyl compound;
• about 1 weight part to about 20 weight parts of the vinyl cyanide compound;
• about 0.5 weight parts to about 3.0 weight parts of a metal salt of rosinate or a metal salt of carboxylate, with C12˜C20, as a second emulsifier;
• and about 0.05 weight parts to about 0.2 weight parts of the oil-soluble initiator, to the alkyl acrylate rubber polymer, to obtain a third compound;
• and
• performing graft copolymerization with respect to the third compound.

A method for preparing a weatherable thermoplastic resin, comprising:

• performing a first polymerization with respect to a first mixture or about 0.05 weight parts to about 0.2 weight parts of a water-soluble initiator and about 0.5 weight parts to about 10 weight parts of either an aromatic vinyl compound or a (meth)acrylic acid alkyl ester, to prepare a seed;
• performing a second polymerization with respect to a second mixture of about 5 weight parts to about 45 weight parts of an alkyl acrylate monomer;
• about 1 weight part to about 5 weight parts of the aromatic vinyl compound, an alkyl methacrylate, or a vinyl cyanide compound;
• about 0.2 weight parts to about 1.0 weight part of a first emulsifier, about 0.05 weight parts to about 0.2 weight parts of an oil-soluble initiator;
• and the seed, to prepare an alkyl acrylate rubber polymer;
• and
• performing graft copolymerization with respect to a third mixture of about 10 weight parts to about 40 weight parts of the aromatic vinyl compound;
• about 1 weight part to about 20 weight parts of the vinyl cyanide compound;
• about 0.5 weight parts to about 3.0 weight parts of a second emulsifier;
• about 0.05 weight parts to about 0.2 weight parts of the oil-soluble initiator;
• and the alkyl acrylate rubber polymer, to prepare a graft copolymer.