Liquid 1,3-dioxolane copolymers

Copolymers, comprising:

• wherein the copolymers are 1,3-Dioxolane copolymers of the general formula I
• H—[O—CH2—O—CH2—CH2-]x1[O—CH2—CH2O—CH2-]x2
• [O—CH2—O—CHR1—CHR2-]y1[O—CHR1—CHR2O—CH2-]y2 OH (I),
• wherein x1+×2 has values of 10 to 2000;
• wherein R1 and R2 are hydrogen radicals or C1 to C18 alkyl radical, where in each case at least one radical R1 or R2 in the units [O—CH2—O—CHR1—CHR2-]y1 and [O—CHR1—CHR2O—CH2-]y2 is a C1 to C18 alkyl radical;
• and
• wherein y1+y2 has values of 3*(x1+x2+y1+y2)/100 to 50*(x1+x2+y1+y2)/100.

A process for producing copolymers, comprising:

• providing copolymers, wherein the copolymers are 1,3-Dioxolane copolymers of the general formula I
• H—[O—CH2—O—CH2—CH2-]x1[O—CH2—CH2O—CH2-]x2
• [O—CH2—O—CHR1—CHR2-]y1[O—CHR1—CHR2O—CH2-]y2 OH (I),
• wherein x1+×2 has values of 10 to 2000,
• wherein R1 and R2 are hydrogen radicals or C1 to C18 alkyl radical, where in each case at least one radical R1 or R2 in the units [O—CH2—O—CHR1—CHR2-]y1 and [O—CHR1—CHR2O—CH2-]y2 is a C1 to C18 alkyl radical,
• wherein y1+y2 has values of 3*(x1+x2+y1+y2)/100 to 50*(x1+x2+y1+y2)/100,
• copolymerizing the 1,3-dioxolane copolymers with alkyl-substituted 1,3-dioxolane of the general formula II
• wherein the copolymerization process occurs in the presence of a Lewis or Brønsted acid.