摘要:
Novel cyclic urea derivatives containing silicon atoms have the general formula
WHEREIN R is a hydrocarbon radical optionally being interrupted by oxygen atoms in ether linkages, R'' and R'''' (same or different) are hydrocarbon radicals, halohydrocaron radicals, cyanohydrocarbon radicals, or alkoxy radicals, and R'''''' is a hydrocarbon radical.
摘要:
EXCELLENT HYDROPHOBIC PROPERTIES AND PLEASANT GLOSS ARE IMPARTED TO SOLID, ESPECIALLY SMOTH, SURFACES, FOR EXAMPLE LACQUER COATINGS OF THE BODIES OF MOTOR VEHICLES, BY APPLYING THERETO, ACCORDING TO THE INVENTION, NEW COATING COMPOSITIONS CONTAINING AS THE EFFECTIVE AGENT AN ORGANOPOLYSILOXANE WHICH IS AMINOMETHYL-SUBSTITUTED ON AT LEAST TWO OF ITS SILOXANE UNITS, CORRESPONDING TO THE FORMULA
IN WHICH P IS AN INTEGER GREATER THAN 25, A IS 0 OR 1, N IS AN INTEGER GREATER THAN (1-A) AND SMALLER THAN P/10, R AND R'', INDEPENDENTLY OF ONE ANOTHER, ARE HYDROGEN ATOMS OR ALKYL OR CYCLOALKYL RADICLS HAVING LESS THAN 9 CARBON ATOMS, AND X IS A MONOVALENT ACID RADICAL.
摘要:
NOVEL CROSS-LINKING AGENTS ARE DISCLOSED WHICH CAN BE COMBINED WITH PLASTICALLY SHAPABLE ORGANO-POLYSILOXANES; THE RESULTING NOVEL MIXTURES OR COMPOSITIONS BEING STORAGE STABLE UNDER EXCLUSION OF ALL MOISTURE. THE CROSS-LINKING REACTION TAKES PLACE ON EXPOSURE OF THE COMPOSITIONS TO WATER, ATMOSPHERIC HUMIDITY SUFFICING, AT TEMPERATURES BELOW 50*C. THE COMPOSITION ARE ESPECIALLY ADAPTED TO BE USED FOR THE FILLING OF JOINTS AND AS SEALING MATERIALS IN THE BUILDING INDUSTRY. THE ELASTOMERS RESULTING THEREFROM HAVE AN INCREASED ADHESION TO THE SUBSTRATE SAVING THE EXPENDITURE OF PRIMING, AND ARE TRANSPARENT. TNE NOVEL COMPISITIONS COMPRISE: (A) AN A,W-DIHYDROXY-POLY-(DIORGANO-SILOXANE) WHICH, IN ADDITION TO ITS DIORGANO-SILOXANE UNITS, MAY CONTAIN UP TO 10 MOL-PERCENT OF SILOXANE UNITS HAVING THE FORMULA CH3SIO3/2, AND MAY BE ADMIXED WITH FILLERS AND AN A,W-BIS-(TRIMETHYL -SILOXY)-POLY-(DIORGANO - SILOXANE); AND (B) A CROSS-LINKING AGENT HAVING THE FORMULA
((RO-)3SI-CH(R'')-)NNQ3-N
IN WHICH N IS 2 OR 3, R IS AN ALKYL RADICAL WITH 1 TO 4 CARBON ATOMS, R'' IS A HYDROGEN ATOM, AN ALKYL RADICAL WITH 1 TO 6 CARBON ATOMS, A CYCLOHEXYL RADICAL OR A PHENYL RADICAL, AND Q IS AN ALKYL OR ALKENYL RADICAL WITH 2 TO 4 CARBON ATOMS, AN ARALKYL RADICAL WITH 7 TO 10 CARBON ATOMS, A DIMETHYLAMINOALKYL RADICAL WITH 2 TO 4 CARBON ATOMS IN ITS ALKYLENE GROUP, AR A METHOXY- OR ETHOXY-ETHYL OR -PROPYL RADICAL.
WHEREIN R IS A HYDROCARBON RADICAL OPTIONALLY BEING INTERRUPTED BY OXYGEN ATOMS IN EITHER LINKAGES, R'' AND R" (SAME OR DIFFERENT) ARE HYDROCARBON RADICALS, HALOHYDROCARBON RADICALS, CYANOHYDROCARBON RADICALS, OR ALKOXY RADICALS, AND R"'' IS A HYDROCARBON RADICALS. THESE 2,5-DIAZA--3-SILACYCLOPENTANONES CAN BE PRODUCED, ACCORDING TO THE INVENTION, BY REACTING AN AMINOMETHYLALKOXYSILANE OF THE GENERAL FORMULA R"''-NH-CH2-SI(-R'')(-R")-O-X (R'', R" AND R"'' AS ABOVE; X=ALKYL) AT A TEMPERATURE BETWEEN 0 AND 250*C. WITH AN ISOCYANATE OF THE GENERAL FORMULA RNCO (R AS ABOVE) AND RECOVERING THE PRODUCT BY DISTILLATION UNDER REDUCING PRESSURE. THESE PRODUCTS ARE SUITABLE FOR PROMOTING THE ADHESION OF SYNTHETIC RESINS TO SILICEOUS SURFACES, FOR USE AS INTERMEDIATES FOR ORGANOPOLYSILOXANE RESINS, AND FOR USE AS CROSS-LINKING AGENTS IN WATER-REACTIVE ORGANOPOLYSILOXANE PREPARATIONS.
摘要:
IN WHICH N IS AN INTEGER OF FROM ONE TO THREE AND R is an alkyl radical having one or two carbon atoms with the proviso that when R1 is a dialkyl amino alkyl group, R2 is hydrogen.
IN WHICH N IS AN INTEGER OF FROM ONE TO THREE AND R is an alkyl radical having one ro two carbon atoms, and R2 is a dialkylaminoalkyl group having the formula
IN WHICH R is an alkyl radical having one or two carbon atoms, R1 is an alkyl radical having one or two carbon atoms or a dialkylaminoalkyl group having the formula
A method is provided for preparing cellular polyurethanes which comprises reacting in the presence of a blowing agent an organic polyisocyanate with a polyether or polyester containing at least two hydroxyl groups in the presence of a catalytic amount of a catalyst having the formula