摘要:
A process for preparing high-purity cyclopropyl methyl ketone from compositions which contain cyclopropyl methyl ketone, 4,5-dihydro-2-methylfuran, addition products of 4,5-dihydro-2-methylfuran by a continuous rectification process in which at least a portion of the composition to be purified is introduced into a rectification apparatus via a side feed located above the bottom portion of the apparatus.
摘要:
The invention relates to a method for the renaturation of denatured proteins in which they are treated with a renaturant which has on vicinal carbon atoms a hydroxyl group and at least one fluorine atom.
摘要:
A method for making antimicrobial, blood-compatible surfaces is provided, articles having surfaces made by this method, and the use of these articles in fields where controlling the spread of microbes and blood-compatibility are important. Such fields include the medical field, where it is critical to eliminate infection causing microbes and reduce the number of dangerous blood clots in patients.
摘要:
Moisture-crosslinking PU hot-melt adhesives produced by reacting an --NCO containing prepolymer and a sterically hindered polyamine which have a very high initial strength.
摘要:
Polyurethane powder coating compositions of high reactivity, containinga) an isocyanate component which is partially or totally blocked with 1,2,4-triazole,b) hydroxyl-containing polymers, andc) if desired, customary auxiliaries and additives, where the isocyanate component is a physical mixture of individual trimers (isocyanato-isocyanurates) of aliphatic and (cyclo)aliphatic and/or cycloaliphatic diisocyanates provide heat curable weather resistant coatings.
摘要:
Heat-curing one-component adhesives which are based on polyurethanes derived from A) a hardener component comprising polyaddition products containing hydroxyl and uretdione groups, B) a binder component comprising 1,2-epoxide compounds having more than one 1,2-epoxide group and one or more hydroxyl groups in the molecule, optionally C) further hydroxyl-containing compounds and optionally D) auxiliaries and additives known from adhesives technology; a process for preparing these compounds and to their use as heat-curing, one-component, solvent-free, thermally stable and solvent-resistant polyurethane (PU) adhesives which do not give off elimination products.
摘要:
A tire comprising a tire tread and a tire tread is disclosed wherein the tire tread is prepared from a tread rubber such as an AB block copolymer comprising from 40 to 80%-wt of block A obtained from butadiene having a uniformly distributed vinyl group content of from 8 to 60%-wt based on the total block A content, and from 20 to 60%-wt of block B derived from butadiene, isoprene and styrene; and a combination of naphthenic and/or paraffinic oil and a filler of carbon black, a mineral filler such as silica or a mixture thereof, or a blend of an aromatic oil and a mineral filler.
摘要:
The preparation of pigment concentrates for the coloring of resin molding compositions in which the pigment is very finely dispersed is carried out successfully using, for the preparation of the pigment concentrates, a dispersant which contains the following components:from 0 to 90% by weight of a substantially amorphous poly-.alpha.-olefin,from 0 to 90% by weight of polyolefin wax,from 0 to 30% by weight of crystalline polyolefin, andfrom 1 to 50% by weight of a specific polyacrylic acid ester.
摘要:
A hydrophilic coating on a polymeric substrate is prepared by subjecting at least one hydrophilic vinyl monomer to radiation-induced graft polymerization on an activated substrate surface.
摘要:
An aqueous alcoholic fluoroalkyl functional group containing organopolysiloxane-composition, comprising:organopolysiloxanes of formula I:RO�Si(A)(CH.sub.3).sub.z (OR).sub.1-z O!.sub.a �Si(B)(R.sup.2).sub.y (OR).sub.1-y O!.sub.b �Si(C)(CH.sub.3)O!.sub.c �Si(D)(OR)O!.sub.d R.multidot.(HX) (I)wherein A is an aminoalkyl radical derived from the compound of formula II:H.sub.2 N(CH.sub.2).sub.f (NH).sub.g (CH.sub.2).sub.h Si(OR).sub.3-z (CH.sub.3).sub.z (II)wherein 0.ltoreq.f.ltoreq.6, 9=0 if f=0 and g=1 if f>0, 0.ltoreq.h.ltoreq.6 and 0.ltoreq.z.ltoreq.1, and B is a fluoroalkyl radical derived from the compound of formula III:R.sup.1 --Y--(CH.sub.2).sub.2 Si(R.sup.2).sub.y (OR).sub.3-y (III)wherein R.sup.1 is a mono-, oligo- or perfluorinated alkyl group having 1-9 C atoms or a mono-, oligo- or perfluorinated aryl group, Y is a CH.sub.2, O or S group, R.sub.2 is a linear, branched or cyclic alkyl group having 1-8 C atoms or an aryl group and 0.ltoreq.y.ltoreq.1, and C is an alkyl radical derived from the compound of formula IV:R.sup.3 --Si(CH.sub.3)(OR).sub.2 (IV)and D is also an alkyl radical derived from the compound of formula V:R.sup.3 --Si(OR).sub.3 (V)wherein R.sup.3 in the preceding formulae is in each case identical or different, and is a linear, branched or cyclic alkyl group having 1-8 C atoms, R in the preceding formulae is in each case identical or different, and is a linear, branched or cyclic alkyl group having 1-8 C atoms or an aryl group, and HX is an acid, in which X is an inorganic or organic acid radical, and 0.ltoreq.y.ltoreq.1, 0.ltoreq.z.ltoreq.1, a>0, b>0, c.gtoreq.0, d.gtoreq.0, e.gtoreq.0 and (a+b+c+d).gtoreq.2.
摘要翻译:含有有机聚硅氧烷组合物的含水醇氟代烷基官能团包括:式I的有机聚硅氧烷:RO [Si(A)(CH3)z(OR)1-zO] a [Si(B)(R2)y(OR) yO] b [Si(C)(CH3)O] c [Si(D)(OR)O] dRx(HX)(I)其中A是衍生自式II化合物的氨基烷基:H 2 N(CH 2)f (NH)g(CH 2)h Si(OR)3-z(CH 3)z(II)其中0 0,则g = R =(Y) - (CH 2)2 Si(R 2)y(OR)3-y (III)其中R1是具有1-9个C原子的单,低聚或全氟烷基或单,低聚或全氟化的芳基,Y是CH 2,O或S基团,R 2是直链,支链 或具有1-8个碳原子或芳基且0≤y≤1的环状烷基,C是衍生自式IV化合物的烷基:R3-Si(CH3)(OR)2( IV),D也是衍生自式V化合物的烷基:R3-Si(OR)3(V)其中前述通式中的R 3在每种情况下均为 或具有1-8个C原子的直链,支链或环状烷基,前述式中的R各自相同或不同,为具有1-8个C原子的直链,支链或环状烷基 或芳基,并且HX是酸,其中X是无机或有机酸基团,并且0≤y≤1,0≤z≤1,a> 0,b> 0 ,c> / = 0,d> / = 0,e> / = 0和(a + b + c + d)> / = 2。