Patent ID: 11965063
Assignee: EMPA EIDGENOESSISCHE MATERIALPRUEFUNGS- UND FORSCHUNGSANSTALT
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 8:
9. A polymeric liquid material, the material being formed of molecular building blocks of core-shell type architecture, each building block consisting of a hyperbranched polysiloxane core and a functional siloxane shell peripherally attached to said core,
the material containing less than 0.5 mass percent hydroxy moieties (Si—OH),
the core having a degree of polymerization DPcore in the range of 1.3 to 2.7,
the shell being formed of R′-substituted siloxane moieties and optionally R1-,R2-substituted siloxane moieties and having a degree of polymerization DPshell in the range of 0.3 to 2.5,
wherein the total silicon to free hydrolysable alkoxy molar ratio in the material is 1:1.25 to 1:2.75,
wherein the material has a viscosity in the range of 10 to 100,000 cP,
and wherein the core is composed of non-organofunctional siloxane moieties comprising
non-organofunctional terminally bonded siloxane moieties (Q1 speciation) of the general formula, and/or

non-organofunctional disiloxane moieties (Q2 speciation) of the general formula, and/or

non-organofunctional trisiloxane moieties (Q3 speciation) of the general formula, and/or

non-organofunctional tetrasiloxane moieties (Q4 speciation) of the general formula, and wherein the shell is composed of:
monoorganofunctional terminally bonded siloxane moieties (T1 speciation) of the general formula, and/or

monoorganofunctional disiloxane moieties (T2 speciation) of the general formula, and/or

monoorganofunctional trisiloxane (T3 speciation) moieties of the general formula, and, optionally,
terminally bonded diorganofunctional siloxane (D1 speciation) moieties of the general formula, and/or
diorganofunctional disiloxane (D2 speciation) moieties of the general formula, wherein R, R′, R1 and R2 are as defined in claim 1.