摘要:
(Methy)acrylic acid esters of the general formula(Mo).sub.n --[--A--O--CO--CH.sub.2 --O--CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CO--O--].sub.x --A--(OM).sub.nare described whereinA is an alcohol radical having at least 4 chain atoms between two junction sites.M is CH.sub.2 .dbd.C(R.sup.1)--CO wherein R.sup.1 stands for hydrogen or methyl,n is 1 or 2, andx is 0.3 to 3.These esters are suited for the preparation of dental compositions.
摘要:
The present composition relates to fabric care compositions comprising an organosiloxane polymer. Methods of using such compositions including contacting a fabric with the composition and rinsing the fabric are also disclosed.
摘要:
The present composition relates to fabric care compositions comprising an organosiloxane polymer. Methods of using such compositions including contacting a fabric with the composition and rinsing the fabric are also disclosed.
摘要:
Silicone polyethers are prepared in a two stage process by reacting an unsaturated polyether with a first Si—H functional organopolysiloxane and then with a second organopolysiloxane, in which the weight ratio of silicon bonded hydrogen in the first and second organopolysiloxanes is at least 0.9. The reaction is more rapid than a single step process and produces a product with less unreacted Si—H content.
摘要:
Defoamer compositions of high effectiveness containing at least one siloxane-based antifoam and polysiloxane copolymers obtained by coupling a polysiloxane bearing active-hydrogen-containing hydrophilic polymer moieties by means of a di- or polyisocyanate.
摘要:
Cellulosic substrates are treated with compound(s) containing at least two primary amino groups and compounds containing at least one β-ketocarbonyl group. The substrates exhibit good strength and hand properties.
摘要:
Organosilicon compounds containing β-ketoamide groups and organic polymer groups bound via enamine bonds are prepared by reaction of compounds bearing at least one β-ketocarbonyl functionality with organosilicon compounds bearing aminoalkylaminoalkyl groups. The products have the same uses as siloxanes containing polyether and acetoacetate groups.
摘要:
Crosslinkable silicone coating compositions are prepared from (1) organopolysiloxanes containing alkenyl groups and containing per molecule at least one unit O3-n/2RnSi—Y(SiRnO3-n/2)a (I), at least 2 units R1RbSiO(3-b)/2 (II), and units RcSiO(4-c)/2 (III), where R is a monovalent, SiC-bonded organic radical having 1 to 30 C atoms free from aliphatic carbon-carbon multiple bonds, R1 is an alkenyl radical having 2 to 4 C atoms, and Y is a divalent or trivalent organic radical having 1 to 30 C atoms, with the proviso that the organopolysiloxanes (1) contain units (II) in amounts wherein the concentration of alkenyl radicals R1 is less than 2 meq/g, (2) organopolysiloxanes containing Si-bonded hydrogen atoms, (3) a hydrosilylation catalyst, and (4) optionally, inhibitors. The compositions cure rapidly with few extractables and are very useful in preparing release coatings.
摘要:
A process for preparing aminoalkylpolysiloxanes involves (i) mixing (1) aminoalkylsilane hydrolyzate (ARaSiO(3-a)/2)m(R1O1/2)p with (I) (2) linear and/or branched organopolysiloxanes R x ( OR 1 ) y SiO 4 - ( x + y ) 2 ( II ) until a dispersion is obtained, where A is a monovalent SiC-bonded hydrocarbon radical containing at least one amino group, a is 0 or 1, m is from 2 to 500, p is at least 2, x is 0, 1, 2 or 3, and y is 0 or 1, and at least 10 silicon atoms on average per molecule are present in the organopolysiloxane (2), (ii) reacting (1) and (2) in dispersion in the presence of a basic catalyst until a substantially clear mixture is obtained, and (iii) neutralizing the basic catalyst.
摘要:
Fibrous substrates with exacted properties are copolymer prepared by reacting an Si-H bearing polysiloxane with a compound containing both a hydrosilylatable group and an isocyanate reactive group, followed by reaction with di- or polyisocyanate used at or below the stoichiometric amount of NCO groups.