Abstract: A method for preparing heat-curable silicone resins by reacting siloxanes with low molecular, multifunctional alcohol and removing the alcohol from the reaction mixture such that each siloxane group corresponds to approximately one alcohol group and terminating the reaction at a degree of conversion of 25% to 80% by cooling the reaction mixture to a temperature of less than 100.degree. C. The silicone resins prepared according to this process have excellent storage stability in the uncured state, a high rate of curing and excellent pigment compatibility and the cured resins possess high thermal stability with good elasticity and good adhesion to metallic substrates.

Abstract: A method for the manufacture of organopolysiloxanes for use in abhesive coating materials wherein organopolysiloxanes having the formula ##STR1## in which R.sup.1 is an alkyl group with 1 to 4 carbon atoms, a vinyl group and/or a phenyl group, with the proviso that at least 90 mole percent of the R.sup.1 groups are methyl groups,a has a value 1.8 to 2.2, andb has a value of 0.004 to 0.5,are reacted with at least equimolar amounts of pentaerythritol triacrylate or pentaerythritol trimethacrylate and separating the product from the solid components suspended therein. The organopolysiloxanes can be rapidly cured and simultaneously fixed on the carrier.

Abstract: A composition for the abhesive coating of metallic cooking surfaces composed of a heat-curable polysiloxane resin, based on the silicone resin, and 0.05 to 4 weight percent of a compound having the formula ##STR1## in which R.sup.1 and R.sup.2 are the same or different and represent a methyl or phenyl residue, with the proviso that at least 80 mole percent of these residues are methyl residues,R.sup.3 are the same or different and represent a residue or several residues of the group(a) alkyl residues with 1 to 4 carbon atoms,(b) phenyl residues,(c) residues which are capable of reaction with the condensable groups of the curable polysiloxane resin,wherein at least one residue R.sup.3 has the meaning of (c), x is 0 or a number greater than 0.The composition forms coatings which are durably abhesive and possess excellent mechanical resistance under conditions of use.

Abstract: A method for preparation of organopolysiloxanes suitable for use as binders in hardenable compositions of polymerizable monomers, the organopolysiloxanes being modified with methacrylic esters by reacting --COH-group containing methacrylic esters with organopolysiloxanes containing --SiX groups wherein X is alkoxyl, hydroxyl or chloro and wherein the organopolysiloxanes are reacted from 0.05 to equimolar amounts of pentaerythritol trimethacrylate. The organopolysiloxanes of the present invention exhibit rapid hardening properties under curing conditions. The compounds and compositions obtained with this process are also disclosed.

Abstract: A process for the preparation of aqueous solutions of alkali organosiliconates in which organoalkoxypolysiloxanes of the formula ##EQU1## in which R.sup.1 is an alkyl residue with 1 to 3 carbon atoms, a vinyl residue and/or a phenyl residue,R.sup.2 is an alkyl residue with 1 to 4 carbon atoms,a is a number .ltoreq.2, andx is 1 to 1.25,are reacted with aqueous solutions of sodium hydroxide or potassium hydroxide having a concentration of 0.7 to 0.9 mole/100 g at temperatures .gtoreq.80.degree. C. The liberated alcohol R.sup.2 OH may be distilled and/or the concentration adjusted to the desired value by the addition of water. With the present invention, alkali chloride-free alkali organosiliconate solutions having high concentration can be obtained while avoiding a filtration step.

Abstract: The disclosed resin composition is the cocondensation product ofA. a polysiloxane having .tbd.SiOR groups, wherein R is lower alkyl and wherein hydrocarbon groups are linked to the silicon of said groups, at least some of said hydrocarbon groups being phenyl, andB. an organic .tbd.COH group containing component which at least partially consists of a diimido compound of the formula ##STR1## wherein R.sup.1 and R.sup.2 symbolize alkylene of 2 - 4 carbon atoms. The inventive resin composition is a superior lacquer capable of withstanding extreme thermal stresses.The invention also discloses a process for preparing the inventive lacquer composition.