3-methacryloxy- and 3-acryloxyisobutylalkoxysilanes

A compound of the general formula (I)

• where
• X is
• and
• R is a linear alkyl group having from 1 to 4 carbon atoms,
• R1 is a linear or branched alkyl group having from 1 to 3 carbon atoms, and wherein m is 1.

A process for the preparation of 3-methacryloxy- or 3-acryloxyisobutylalkoxysilanes, the process comprising:

• reacting an alkali metal methacrylate or an alkali metal acrylate with a 3-chloroisobutylalkoxysilane of the general formula (II)
• where R is a linear alkyl group having from 1 to 4 carbon atoms, R1 is a linear or branched alkyl group having 1 to 3 carbon atoms, and m is 0 or 1, in the presence of at least one phase transfer catalyst;
• and
• forming a 3-methacryloxy- or 3-acryloxyisobutylalkoxysilane of the general formula (I)
• and
• R, R1 and m are as defined above.

A filled polymer comprising a compound of the general formula (I)

• where
• X is
• and
• R is a linear alkyl group having from 1 to 4 carbon atoms,
• R1 is a linear or branched alkyl group having from 1 to 3 carbon atoms, and
• m is 0 or 1.

A glass-fiber-reinforced plastic composition comprising a compound of the general formula (I)

• where
• X is
• and
• R is a linear alkyl group having from 1 to 4 carbon atoms,
• R1 is a linear or branched alkyl group having from 1 to 3 carbon atoms, and m is 0 or 1.