摘要:
Elastic-thermoplastic graft polymers manufactured by radical emulsion polymerization of resin-forming vinyl monomers in the presence of rubber present in latex form with the use of a combination of a peroxide of formula (I) ##STR1## where R.sup.1 signifies alkyl, cycloalkyl and aryl groups with 4 to 20 carbon atoms, X the groups --COOH and --SO.sub.3 H as well as their alkali, alkaline-earth or ammonium salts, n an integer in the range from 1 to 6, A alkylene, cycloalkylene and arylene groups with 6 to 40 carbon atoms and a reducing agent as initiator system, a method for their manufacture and their use as moulding compositions.
摘要:
Elastic-thermoplastic graft polymers manufactured by radical emulsion polymerisation of resin-forming vinyl monomers in the presence of rubber present in latex form with the use of a combination of a peroxide of formula (I) ##STR1## where R.sup.1 signifies alkyl, cycloalkyl and aryl groups with 4 to 20 carbon atoms,X the groups --COOH and --SO.sub.3 H as well as their alkali, alkaline-earth or ammonium salts,n an integer in the range from 1 to 6,A alkylene, cycloalkylene and arylene groups with 6 to 40 carbon atomsand a reducing agent as initiator system, a method for their manufacture and their use as moulding compositions.
摘要:
The present invention relates to surface-active peroxides which can be employed as emulsifying initiators for the preparation of low-electrolyte polymer dispersions having a low tendency to foam.
摘要:
This invention relates to graft polymers of the ABS type which are produced in emulsion, and to thermoplastic molding compositions which are based thereon and which exhibit a very considerably increased notched bar impact strength compared with known ABS molding compositions and which at the same time exhibit high hardness values or high modulus values and good thermoplastic processability.
摘要:
ABS type thermoplastic moulding compounds obtainable by A) producing a rubber latex with an average particle diameter d.sub.50 of 30 to 160 nm and a gel content of 75 to 100 wt. % B) emulsion polymerization of an amount of butadiene and optionally up to 50 wt. % (with reference to the total amount of monomer in stage B) of a comonomer in the presence of the rubber obtained in stage A, such that a rubber latex (B) with an average particle diameter d.sub.50 =220 to 330 nm and a gel content of 25 to 70 wt. % is produced, C) emulsion polymerization of 40 to 95 parts by wt. of a mixture of styrene and acrylonitrile, which optionally contains up to 50 wt. % (with reference to the total amount of monomers used in stage C) of one or more comonomers, in the presence of 5 to 60 parts by wt. (with reference to the solids) of the rubber obtained in stage B by introducing the monomer in such a way that 55 to 90 wt. % of the monomers are added within the first half of the total monomer introduction time, and D) mixing the polymer obtained in stage C, preferably after first converting it into a powder, with at least one thermoplastic vinyl resin.
摘要:
The present invention provides polymer compositions of special graft rubber polymers, in the production of which are employed rubbers with defined particle diameters obtained by seed polymerization using seed latex particles with defined particle diameters.
摘要:
This invention relates to thermostable thermoplastic moulding compounds consisting of a thermoplastic aromatic polycarbonate resin, a graft polymer and optionally a thermoplastic vinyl polymer wherein the graft or vinyl polymer is emulsion polymerized with an emulsifier which is the reaction product of 2 mols of certain carboxylic anhydrides and 1 mole of certain diols.
摘要:
An improved coating for heat resistant substrates is an aqueous dispersion of polymers prepared by polymerization of olefinically unsaturated monomers in an aqueous medium in the presence of radical formers and emulsifiers, wherein the emulsifiers are polyisocyanate addition products having a molecular weight below 20,000 and containing from 5 to 1000 milliequivalents of anionic structures corresponding to the following formula--NH--CO--N.sup..crclbar. --C.tbd.Nincorporated therein per 100 g of solids content.
摘要翻译:用于耐热基材的改进的涂层是通过在自由基形成剂和乳化剂存在下在水性介质中聚合烯属不饱和单体制备的聚合物的水分散体,其中乳化剂是分子量低于20,000的多异氰酸酯加成产物,并含有5 至每1000克固体含量相应于下式-NH-CO-N( - ) - C 3BOND N的1000毫当量阴离子结构。
摘要:
Sulphosuccinamide acids and their salts corresponding to the following general formula ##STR1## wherein X denotes the residue of a hydrophobic, optionally branched vinyloligomer having an average molecular weight M.sub.n of from 200-5,000, preferably from 300-3,000,of the groups denoted byR.sup.1 R.sup.2, one is hydrogen and the other is --SO.sub.3 M, andn represents a number with a value of from 1.4-3.0, preferably form 1.6-2.3. andM denotes hydrogen, an alkali metal, or an ammonium, C.sub.1 -C.sub.4 -alkyl-ammonium or C.sub.2 -C.sub.3 -hydroxy alkyl-ammonium group.
摘要:
A thermoplastic molding composition that features constancy of properties, especially toughness and processability is disclosed. The composition contains a first graft rubber polymer that is a product of emulsion polymerisation of styrene and acrylonitrile in the presence of a butadiene polymer latex (A) with a mean particle diameter d50 of 80 to 220 nm, a second graft rubber polymer obtained by emulsion polymerisation of styrene and acrylonitrile in the presence of a butadiene polymer latex (B) with a mean particle diameter d50 of 340 to 480 nm, and a rubber-free copolymer of styrene and acrylonitrile. Importantly, the butadiene polymer latex (A) is the product of seed polymerization using a seed latex with a mean particle diameter of 10 to 100 nm, and the butadiene polymer latex (B) is the product of seed polymerisation using the butadiene polymer latex (A) as seed latex.