摘要:
A process for the preparation of stable aqueous aldehyde resin dispersions and for the production of surface coating binders.For this purpose, a melt or highly concentrated solution of a polycondensate of urea and a CH-acidic aldehyde, with or without formaldehyde, is dispersed in water in the presence of an organic protective colloid and, if required, an emulsifier.These aqueous resin dispersions can be used, in combination with other film formers, as surface coating binders.
摘要:
A process for the preparation of a stable aqeuous ketone resin or ketone/aldehyde resin dispersions and a process for the production of surface coating binders. For this purpose, a melt or a highly concentrated solution of the ketone resin or ketone/aldehyde resin is dispersed in water in the presence of an organic protective colloid. These aqueous resin dispersions can be used, in combination with other film formers, as surface coating binders.
摘要:
An aqueous composition comprises a mixture of from 10 to 50% by weight of a polymer A) having a gel content of less than 40% by weight and a number-average molecular weight Mn of the soluble fractions of less than 30,000 and from 50 to 90% by weight of a filler B), the amounts by weight being based on the weight sum of the polymer and of the filler.
摘要翻译:水性组合物包含10至50重量%的聚合物A)的混合物,该聚合物A)的凝胶含量小于40重量%,数均分子量M n n可溶部分 小于30,000和50至90重量%的填料B),重量的量基于聚合物和填料的重量之和。
摘要:
An aqueous polymer dispersion whose polymer, present in disperse distribution, is composed in free-radically polymerized form of from 20 to 65% by weight of at least one vinylaromatic monomer (monomers A), from 30 to 75% by weight of at least one monomer having two conjugated, ethylenically unsaturated double bonds (monomers B), and from 0.5 to 10% by weight of at least one other monomer, C, selected from the group consisting of &agr;,&bgr;-monoethyienically unsaturated mono- and dicarboxylic acids and amide or ester derivatives thereof and whose alkali metal ion content GA, based on the mass of the dispersed polymer, is ≧0.5% by weight, the pH of the aqueous dispersion medium being adjusted to a value below 6.
摘要:
An aqueous composition containing from 1 to 60% by weight of a polymer A) built up from a) from 10 to 50% by weight of a vinylaromatic having up to 20 carbon atoms, b) from 45 to 75% by weight of a nonaromatic hydrocarbon having two conjugated double bonds, c) from 0 to 20% by weight of a water-soluble monomer having a water solubility of at least 100 g per liter of water under standard conditions (21° C. and 1 bar), the water-soluble monomer containing no acid group or acid anhydride group, d) from 0.1 to 4.5% by weight of a monomer containing at least one acid group or acid anhydride group, e) from 0 to 30% by weight of a monomer other than a) to d), and from 40 to 99% by weight of a filler B), the weight data for A) and B) being based on the sum of A) and B).
摘要:
The present invention relates to a process for preparing polymer powders from aqueous polymer dispersions in which the dispersed polymer P comprises in copolymerized form: i) at least one vinylaromatic monomer (a), ii) 1,3-butadiene as monomer (b), and iii) one or more monomers (c) different than the monomers (a) and (b), which comprises drying the aqueous polymer dispersion in the presence of polyvinyl alcohol as drying agent. The present invention also relates to the polymer powders obtainable by this process and to the use of these polymer powders as binders in paints, varnishes and coating compositions generally, in adhesives, and for modifying mineral construction materials. The present invention also relates to mineral construction materials in the form of dry formulations comprising the polymer powders of the invention.
摘要:
Aqueous composition comprising from 10 to 35% by weight of a water-dispersed polymer A) having a glass transition temperature Tg of below −10° C. from 5 to 22% by weight of a resin B) which is liquid at 23° C. and 1 bar, has a glass transition temperature of below −10° C. and in which abietic acid is soluble at 23° C. and 1 bar such that it is possible to obtain solutions of resin B and abietic acid having a weight content of up to 50% by weight of abietic acid from 5 to 22% by weight of a resin C) which is based on abietic acid or on modified abietic acid and has a glass transition temperature of from 0 to 90° C. and from 21 to 80% by weight of a filler D), the percentages by weight being based on the sum of the constituents of the aqueous composition with the exception of water.
摘要:
Adhesives containing polyvinyl ether copolymers having a weight average molecular weight of >10,000, comprisea) from 0 to 95% by weight of vinyl ethers of the formula IH.sub.2 C.dbd.CH--O--Rb) from 5 to 100% by weight of hydrophilic vinyl ethers of the formula IIH.sub.2 C.dbd.CH--O--R.sup.1andc) from 0 to 30% by weight of further monomers,where R is C.sub.1 -C.sub.20 -alkyl and R.sup.1 is an aliphatic or cycloaliphatic radical which may be substituted by hydroxyl groups or interrupted by nonadjacent groups --Y--, Y is oxygen, sulfur or a group NR.sup.2 or N.sup.+ R.sup.2 R.sup.3 X.sup.-, R.sup.2 and R.sup.3 independently of one another are each hydrogen or C.sub.1 -C.sub.4 -alkyl and X.sup.- is a counter-anion, and the molar ratio of carbon atoms to the sum of groups Y and hydroxyl groups in the aliphatic or cycloaliphatic radical is from 1.01:1 to 6.5:1.
摘要:
Aqueous synthetic resin formulations essentially containA) from 3 to 75% by weight of one or more synthetic resins which are composed ofa) from 50 to 99.9% by weight of one or more unsaturated carboxylic or vinyl esters,b) from 0.1 to 12% by weight of one or more .alpha.,.beta.-monoethylenically unsaturated monobasic or dibasic acids or their ahydrides,c) from 0 to 10% by weight of one or more monoethylenically unsaturated acetophenone or benzophenone derivatives,d) from 0 to 35% by weight of one or more other copolymerizable monoethylenically unsaturated monomers, in polymerized form,B) one or more metal cations having a charge of from 2 to 4, in water-soluble form,C) from 0 to 10% by weight, based on the synthetic resin A, or benezophenones or acetophenones which are not monoethylenically unsaturated,D) effective amounts of emulsifiers or protective colloids or a mixture of these active ingredients,E) not less than 5% by weight of water andF) from 0 to 85% by weight of finely divided fillers, and the total amount of the cations B is such that it is capable of neutralizing from 0.2 to 6 times the amount, corresponding to the amount of acid functions incorporated in the form of the monomers b in the synthetic resin A, of their conjugated bases.These synthetic resin formulations are suitable for coating, adhesive bonding, sealing or impregnating.
摘要:
Aqueous secondary dispersions containing phosphate groups are obtainable by copolymerization of(A) 25-98% by weight of acrylates and/or methacrylates,(B) 1-10% by weight of acrylic and/or methacrylic acid,(C) 1-8% by weight of a compound of the general formula ##STR1## where R.sup.1 and R.sup.2 are each hydrogen and/or a C.sub.1 -C.sub.8 -hydrocarbon radical and Z is a straight-chain or branched C.sub.1 -C.sub.8 -alkylene, and(D) 0-60% by weight of a copolymerizable olefinically unsaturated compound, in an organic solvent, neutralization of the copolymer solution and dilution with water and, if required, removal of solvent by distillation.