Siloxane based polymeric liquid material and method for preparing the same

A polymeric liquid hyperbranched polysiloxane material composed of:

• non-organofunctional Q-type alkoxysilicate moieties
• and
• R′ substituted mono-organofunctional T-type alkoxy terminated siloxane moieties
• wherein:
• each R is independently methyl or ethyl, and
• each R′ is either
• (i) selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, t-butyl, hexyl, octyl, dodecyl, hexadecyl, (3,3,3-trifluoro) propyl, (1H,1H, 2H, 2H-perfluoro) octyl, (1H,1H, 2H, 2H-perfluoro) dodecyl, and (1H,1H, 2H, 2H-perfluoro) hexadecyl, or
• (ii) wherein
• L is an aliphatic linker selected from the group consisting of —CH2—, —CH2CH2—, —CH2CH2CH2—, —C6H4—, —C6H4—CH2—, and —CH2—CH2—C6H4—CH2—, and
• Z is a functional terminus selected from the group
• wherein R* is selected from the group consisting of —CH3(Me), —CH2CH3(Et), and —CH2CH2CH2CH3 (Bu), or
• (iii) RS wherein:
• wherein:
• n is 1, 2, 3, 4, or 5,
• R* is selected from the group consisting of —CH3 (Me), —CH2CH3(Et), and —CH2CH2CH2CH3 (Bu) as defined above, and
• R** is selected from the group consisting of —(CH2)5CH3 (Hexyl), —(CH2)6CH3 (Heptyl), —(CH2)7CH3 (Octyl), —(CH2)8CH3 (Nonyl), —(CH2)9CH3 (Decyl), —(CH2)11CH3 (Dodecyl), and —(CH2)13CH3 (Tetradecyl),
• the material having a degree of polymerization of the non-organofunctional Q-type moieties (DPQ-type) in the range of 1.3 to 2.7, and
• the mono-organofunctional T-type moieties having a degree of polymerization of the mono-organofunctional T-type moieties (DPT-type) in the range of 1.1 to 2.7,
• the material optionally further containing R1-,R2-substituted di-organofunctional D-type siloxane moieties
• wherein:
• R1 and R2 are independently selected from the group consisting of —CH3, —C2H5, —C6H5, —C6H11, —CH═CH2, —CH2—CH2—Cl, and —C5H5, and
• the di-organofunctional D-type moieties having a degree of polymerization of the di-organofunctional D-type moieties DPD-type in the range of 1.0 to 1.9, and
• the total content of di-organofunctional D-type siloxane moieties in the material does not exceed 10 molar percent,
• the material having a viscosity in the range of 10-100′000 cP,
• the material containing less than 5 molar percent hydroxy moieties (Si—OH) and the total silicon to free hydrolysable alkoxy molar ratio in the material being in the range of 1:1.25 to 1:2.75,
• wherein the total molar content of ethoxy terminating units (—OCH2—CH3) is at least twice the total content of methoxy terminating units (—OCH3), and
• wherein the relative atomic ratio of T to Q species in the material is in the range 0.01:1 to 1:1,
• with the following conditions:
• the material comprises at least two non-identically R′-substituted mono-organofunctional (T-type) alkoxy terminated siloxane moiety populations, each population making up at least 3 molar percent of all mono-organofunctional T-type alkoxy terminated moieties in the material, and/or
• the material comprises chiral mono-organofunctional T1-type alkoxy terminated moieties in an amount of at least 3 molar percent relative to all mono-organofunctional T-type alkoxy terminated moieties in the material.