Abstract: The invention relates to a process for producing at least one cyclosiloxane by catalyzed depolymerization of silicone waste comprising or consisting of the steps: (i) dissolving at least a portion of the silicone waste in at least one solvent containing or consisting of at least one aliphatic hydrocarbon (K) using at least one depolymerization catalyst (D1), (ii) optionally deactivating the at least one depolymerization catalyst (D1) and adding at least one further depolymerization catalyst (D2), (iii) distillative removal of the at least one cyclosiloxane from the mixture, characterized in that the at least one aliphatic hydrocarbon (K) comprises at least 16 carbon atoms.

Abstract: Hexamethylcyclotrisiloxane is used in an equilibration reaction with at least one poly(methylhydrogen)siloxane in the presence of at least one equilibration catalyst to form a poly(methylhydrogen)-polydimethylsiloxane copolymer. A content of at least 0.5 wt.-% of hexamethylcyclotrisiloxane can decrease the equilibration reaction time to provide a statistical equal distribution of the SiH functionalities of the poly(methylhydrogen)-polydimethylsiloxane copolymer. The produced poly(methylhydrogen)-polydimethylsiloxane copolymer can be used to produce polyether polydimethylsiloxane that can be used as stabilizers for polymer foams, such as polyurethane foams.

Abstract: A silicone (meth)acrylate preparable by a method for preparing silicone (meth)acrylates is disclosed herein. The method includes reacting at least one acetoxy silicone with at least one hydroxy-functional (meth)acrylic ester. The corresponding silicone (meth)acrylates are useful, and can be used in curable compositions. A composition of the at least one silicone (meth)acrylate is also disclosed. A release coating or 3D printing, obtainable by curing the composition is further disclosed.

Abstract: The invention provides a macromonomer, an electrolyte precursor composition comprising the macromonomer, a method to prepare a solid-polymer electrolyte, a solid-polymer electrolyte, a solid-state lithium secondary battery, an electrochemical device and a device.

Abstract: A composition has silicone urethane (meth)acrylates having at least three (meth)acrylate groups and not more urethane groups than (meth)acrylate groups, as well as optionally at least one curing catalyst, at least one additive, and at least one solvent. A method prepares said composition, and release coatings, protective films, and protective coatings can be obtained by curing said compositions.

Abstract: A process can be used for preparing silicone (meth)acrylates, according to which at least one acetoxysilicone is reacted with at least one hydroxyfunctional (meth)acrylic acid ester. The corresponding silicone (meth)acrylates are useful, and can be used in curable compositions.

Abstract: Polyester-modified, branched organosiloxanes can be used as plastics additives. Corresponding plastics compositions contain at least one plastics additive (A) and at least one plastic (B). The at least one plastics additive (A) can be one or more polyester-modified, branched organosiloxanes. Moulding compounds or shaped bodies can contain this plastics composition. The plastics composition, the moulding compounds, and the shaped bodies are useful.

Abstract: A process can be used for preparing polyether-modified polybutadienes. The process involves reacting at least one polybutadiene (A) with at least one epoxidizing reagent (B) to give at least one epoxy-functional polybutadiene (C). The at least one epoxy-functional polybutadiene (C) is then reacted with at least one hydroxy-functional compound (D) to give at least one hydroxy-functional polybutadiene (E). The at least one hydroxy-functional polybutadiene (E) is finally reacted with at least one epoxy-functional compound (F) to give at least one polyether-modified polybutadiene (G).

Abstract: The present invention provides a process for depolymerizing waste silicones to afford siloxane cycles, wherein the process comprises a first step of reacting the waste silicone with at least one alcohol and at least one alkali metal alkoxide without removing any potentially occurring water from the reaction mixture, subsequently neutralizing the reaction mixture, removing the solid constituents and then distillatively removing the optionally previously added solvent and excess alcohol and subsequently heating the obtained alkoxysiloxane with at least one fatty alcohol and at least one alkali metal alkoxide with mixing and distillatively removing the siloxane cycles formed.

Abstract: A process for preparing hydrogenated polyether-modified amino-functional polybutadienes includes: reacting at least one polybutadiene with at least one epoxidizing reagent to give at least one epoxy-functional polybutadiene; reacting the at least one epoxy-functional polybutadiene with at least one amino-functional compound to give at least one hydroxy- and amino-functional polybutadiene; reacting the at least one hydroxy- and amino-functional polybutadiene with at least one epoxy-functional compound to give at least one polyether-modified amino-functional polybutadiene; and hydrogenating the at least one polyether-modified amino-functional polybutadiene to give at least one hydrogenated polyether-modified amino-functional polybutadiene.

Abstract: Curable composition for producing coating systems having an anti-adhesive property containing at least one film-forming polymer and at least one organo-modified, branched siloxane of formula (I) or mixtures thereof.

Abstract: A process for preparing hydrogenated polyether-modified polybutadienes includes: reacting at least one polybutadiene with at least one epoxidizing reagent to give at least one epoxy-functional polybutadiene; reacting the at least one epoxy-functional polybutadiene with at least one hydroxy-functional compound to give at least one hydroxy-functional polybutadiene; reacting the at least one hydroxy-functional polybutadiene with at least one epoxy-functional compound to give at least one polyether-modified polybutadiene; and hydrogenating the at least one polyether-modified polybutadiene to give at least one hydrogenated polyether-modified polybutadiene.

Abstract: A process for preparing polyether-modified amino-functional polybutadienes involves a) reacting at least one polybutadiene (A) with at least one epoxidizing reagent (B) to give at least one epoxy-functional polybutadiene (C); b) reacting the at least one epoxy-functional polybutadiene (C) with at least one amino-functional compound (D) to give at least one hydroxy- and amino-functional polybutadiene (E); and c) reacting the at least one hydroxy- and amino-functional polybutadiene (E) with at least one epoxy-functional compound (F) to give at least one polyether-modified amino-functional polybutadiene (G). The polyether-modified amino-functional polybutadienes preparable by this process are also provided.

Abstract: Silicone urethane (meth)acrylates can have at least three (meth)acrylate groups and not more urethane groups than (meth)acrylate groups. A method for preparing the silicone urethane (meth)acrylates involves reacting at least one hydroxy functional silicone (meth)acrylate with at least one isocyanate functional urethane (meth)acrylate. Compositions can contain the silicone urethane (meth)acrylates, and are useful for the production of release coatings, protective films, and protective coatings; and for the manufacturing of 3D printed objects by stereolithography.

Abstract: A process for producing one or more alkoxysiloxanes by thermal reaction of at least one siloxane parent structure with at least one alkali metal alkoxide and at least one alcohol, where the process includes mixing, while heating, the at least one siloxane parent structure with the at least includes one alcohol and the at least one alkali metal alkoxide to form a reaction mixture, neutralizing the reaction mixture by addition of at least one Brønsted acid and optionally with addition of at least one solvent, and subsequently isolating the one or more alkoxysiloxanes by thermal separation of volatile compounds. Potentially occurring water is not removed from the reaction mixture and the reaction mixture does not include solvents which form an azeotrope with water and/or further dehydrating agents.

Abstract: Processes may produce alkoxysiloxane(s) by reaction of siloxane parent structure(s) with alkali metal alkoxide(s). Such processes may include reacting siloxane parent structure(s) by mixing with alkali metal alkoxide(s) with heating and optionally adding silicon dioxide, but without adding alcohol and without removal of any potentially occurring water from the reaction mixture; and neutralizing the resulting reaction mixture by adding Brønsted acid(s), optionally solvent(s), and preferably separating solid constituents; and subsequently isolating the alkoxysiloxane(s) by thermally separating volatile compounds. The siloxane parent structure(s) may be a hexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), dodecamethylcyclohexasiloxane (D6), mixture of cyclic branched D/T type siloxanes, silicone oils preferably including at least 100 D units, polydimethylsiloxanediol(s), and/or ?,?-divinylsiloxane(s).

Abstract: A process for producing alkoxysiloxanes by thermal reaction of at least one waste silicone with at least one alkali metal alkoxide and at least one alcohol. The process includes a first step of reacting the at least one waste silicone by mixing with at least one alcohol and at least one alkali metal alkoxide with heating, but without removing any potentially occurring water from the reaction mixture, and a second step of neutralizing the reaction mixture resulting from this reaction using at least one Brønsted acid and separating the solid constituents, and subsequently isolating the alkoxysiloxane by thermal separation of volatile compounds.

Abstract: A process can be used for preparing polyether-modified polybutadienes. The process involves reacting at least one polybutadiene (A) with at least one epoxidizing reagent (B) to give at least one epoxy-functional polybutadiene (C). The at least one epoxy-functional polybutadiene (C) is then reacted with at least one hydroxy-functional compound (D) to give at least one hydroxy-functional polybutadiene (E). The at least one hydroxy-functional polybutadiene (E) is finally reacted with at least one epoxy-functional compound (F) to give at least one polyether-modified polybutadiene (G).

Abstract: A process can be used for preparing silicone (meth)acrylates, according to which at least one acetoxysilicone is reacted with at least one hydroxyfunctional (meth)acrylic acid ester. The corresponding silicone (meth)acrylates are useful, and can be used in curable compositions.

Abstract: SiOC-linked, linear polydimethylsiloxane-polyoxyalkylene block copolymers of formula (I) C—B-(AB)a—C1 are produced by reaction of end-equilibrated ?,?-diacetoxypolydimethylsiloxanes with a mixture including at least one polyether polyol, preferably a polyether diol, and at least one polyether monool or at least one monohydric alcohol.