Mixed internal donor structures for 1-olefin polymerization catalysts

A solid catalyst component for use in olefinic polymerization, comprising:

• a reaction product of a titanium compound,
• a magnesium compound, and
• a combination of internal electron donor compounds,
• wherein said combination of internal electron donor compounds comprises at least one 1,8-naphtyl diester compound represented by chemical formula (I):
• and at least one 3,3-bis(methoxymethyl) alkane compound represented by chemical formula (II):
• wherein
• R1-R6 are each independently hydrogen, halogen, C1-C20 linear or branched alkyl, C5-C10 cycloalkyl-alkyl, C5-C20 alkyl-cycloalkyl, phenyl, C7-C10 alkylaryl, or C7-C18 arylalkyl radicals;
• A and B, which are identical or different, are substituted or unsubstituted hydrocarbyl radicals having 3 to 20 carbon atoms;
• and
• R7 and R8 which are identical or different, C1-C20 linear or branched alkyl, C5-C20 alkyl-cycloalkyl, or C5-C20 cycloalkyl-alkyl radicals.

A method of making a solid catalyst component for a catalyst system, comprising:

• contacting a magnesium compound and a titanium compound with a combination of internal electron compounds,
• wherein said combination of internal electron compound comprises at least one 1,8-naphthyl diester compound represented by chemical formula (I):
• and at least one 3,3-bis(methoxymethyl) alkane compound represented by chemical formula (II):
• wherein
• R1-R6 are each independently hydrogen, halogen, C1-C20 linear or branched alkyl, C5-C10 cycloalkyl-alkyl, C5-C20 alkyl-cycloalkyl, phenyl, C7-C10 alkylaryl, or C7-C18 arylalkyl radicals;
• A and B, which are identical or different, are substituted or unsubstituted hydrocarbyl radicals having 3 to 20 carbon atoms;
• and
• R7 and R8 which are identical or different, C1-C20 linear or branched alkyl, C5-C20 alkyl-cycloalkyl, or C5-C20 cycloalkyl-alkyl radicals.