摘要:
The present invention relates to polysiloxane compositions which cross-link by condensation and contain at least one cross-linkable polysiloxane, at least one basic filler, at least one phosphorus compound, at least one alkoxysilane cross-linking agent, at least one organometallic compound and optionally other auxiliary substances, a process for their production and their use, as well as surface-modified fillers and their use.
摘要:
Storage-stable crosslinkable RTV-1 compositions comprising at least one tin catalyst obtained by the reaction of at least one organotin compound with at least one monoorthophosphoric acid or mixture of mono and di-orthophosphoric acids, and at least one crosslinkable polysiloxane.
摘要:
Compounds of the general formula(R.sup.3 O).sub.3-n R.sup.4.sub.m Si--(CH.sub.2).sub.z --XwhereinR.sup.3, R.sup.4 represent identical or different linear or branched C.sub.1 -C.sub.20 alkyl groups or alkoxyalkyl groups,X represents a halogen atom,an aminoaryl group, wherein the aromatic group can optionally carry, on one or more carbon atoms at any position, C.sub.1 -C.sub.20 alkyl groups or alkoxyalkyl groups, halogen atoms or other functional groups.or a hydroxyl group or a C.sub.1 -C.sub.20 alkoxyalkyl group, which is substituted at one or more carbon atoms at any position by one or more hydroxyl groups,n=0, 1 or 2 andz=an integer between 1 and 20 aresuitable as adhesion promoters in 1K-RTV compounds which have titanium compounds as condensation catalysts.
摘要:
The invention relates to activators for the depolymerization of polysiloxanes which are crosslinked, optionally contain fillers and/or are uncrosslinked, a method for the depolymerization of polysiloxanes which are crosslinked, optionally contain fillers and/or are uncrosslinked, and their use.
摘要:
Materials useful as bonding agents for silicone 1K-and 2K-sealing compositions are the reaction products of 2-(aminoethyl) -aminopropyl-alkoxy silanes of the following formula:H.sub.2 NCH.sub.2 CH.sub.2 NHCH.sub.2 CH.sub.2 CH.sub.2 Si(OR.sup.1).sub.m R.sup.2.sub.3-mwith chlorosilanes of the following formula:R.sup.3.sub.a R.sup.4.sub.b SiCl.sub.4-(a+b)whereinR.sup.1, R.sup.2, R.sup.3 and R.sup.4, independent of each other, are alkyl having 1 to 8 carbon atoms, cycloalkyl having 3 to 8 carbon atoms, alkenyl having 2 to 8 carbon atoms or cycloalkenyl having 3 to 8 carbon atoms;m is 2 or 3,a and b are 0, 1 or 2 and the sum of a and b is 0, 1 or 2.
摘要:
A process for improving the storage life of a one-component silicone paste containing an alkali metal phosphate and which cures with elimination of acetic acid on exposure to atmospheric moisture, which comprises adding to such paste an acidic additive bearing the functional group --SO.sub.3 H or hydrogen chloride in a concentration sufficient to convene the alkali metal phosphate into the alkali metal salt of the acidic additive.
摘要:
In the production of a triorganylsily or organodiorganylsilyl end-terminated poly-(diorganosiloxane) by reacting an .alpha.,.omega.-dihydroxypoly(diorganosiloxane) with a tetraorganyloxysilane or organotriorganyloxysilane in the presence of at least one alkali hydroxide, alkali alkoxide or alkali silanolate as a catalyst, the improvement which comprises effecting the reaction also in the presence of additionally at least one alkali metal salt which is soluble in the reactive system.
摘要:
Polysiloxane compositions which harden in the presence of moisture by elimination of alcohols, which have high stability in storage while unvulcanized in the absence of moisture, which exhibit good adhesion to substrates, and which are improved by the presence of stabilizing silyl derivations of N-methyl benzamide contain:(A) 100 parts by weight of a polydimethyl siloxane which contains terminal diorganyloxyorganosilyl or triorganyloxylsilyl groups and which has a viscosity of 0.1 to 100 Pas,(B) 0 to 100 parts by weight of an .alpha.,.omega.-bis(trimethylsiloxy)-polydimethyl siloxane which has a viscosity of from 0.04 to 10 Pas,(C) 0 to 5 parts by weight of an alkoxysilane having the formulaR.sup.1.sub.a Si(OR.sup.2).sub.4-a, in whichR.sup.1 is C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl or C.sub.5 -C.sub.6 aryl;R.sup.2 is C.sub.1 -C.sub.6 alkyl, and a is 0 or 1,(D) 0.1 to 5 parts by weight of an aminoalkyl alkoxysilane containing one or more basic nitrogen atoms attached to a silicon atom through at least 3 carbon atoms,(E) 5 to 250 parts by weight of a reinforcing or non-reinforcing filler or filler mixture,(F) 0.01 to 2 parts by weight of an organometallic catalyst and(G) 0.5 to 5 parts by weight of an amidosilane of the formula ##STR1## in which each R.sup.3 is the same or different from any other R.sup.3 and is C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl, C.sub.5 -C.sub.6 aryl or unbranched or branched C.sub.1 -C.sub.6 alkoxy; X is a C.sub.1 -C.sub.4 alkyl; and b is 1 or 2.