摘要:
An .alpha.-methylstyrene/acrylonitrile copolymer obtainable by emulsion polymerization which, in combination with other polymers, particularly PVC, enables alloys of outstanding thermal stability and color stability to be produced and, in addition, has a high heat distortion temperature and shows good fogging behavior and which is obtained by radically initiated inflow copolymerization of a mixture of 30 to 32 parts by weight acrylonitrile and 68 to 70 parts by weight .alpha.-methylstyrene in the presence of an emulsifier containing carboxyl groups. The polymerization is conducted in such a way that a seed latex of the same copolymer or of an analogous copolymer is introduced before addition of the monomers is commenced, the reaction temperature is kept between 75.degree. and 82.degree. C. and the molar ratio of emulsifier to initiator is between 4 and 6.
摘要:
The invention relates to a process for the recovery of thermoplastic polymers from aqueous dispersions by spray-drying after treatment with carboxylic acid of formula I ##STR1## wherein X is a single bond, --CH.sub.2 -- or --C.sub.2 H.sub.4 --, andR is --H, --OH or ##STR2##
摘要翻译:本发明涉及一种通过喷雾干燥从水分散体中回收热塑性聚合物的方法,该方法是用式I的羧酸(I)(其中X是单键,-CH 2 - 或-C 2 H 4 - )和R 是-H,-OH或
摘要:
This invention relates to a granular, free-flowing detergent component which dissolves rapidly in water and which has a powder density of from 550 to 900 g/l, consisting of synthetic, essentially nonionic surfactants, inorganic supports, other organic washing aids, and water bound by adsorption and in hydrate form. The detergent component is produced by spray-drying, and more than 50% by weight thereof consists of droplet-like to rodlet-like particles having an average diameter of from about 0.02 to 1.5 mm, an average length of from about 0.1 to 5 mm, and a ratio of average diameter to average length of from about 1:1.2 to 1:10, optionally coated with a finely divided water-soluble or water-dispersible solid material as a fluidity improving agent.
摘要:
The invention relates to a process for preparation of hen's eggs during which the eggs are put into a cooking chamber of an egg-cooking container (2) closeable by a cover (8), which chamber contains a liquid heat-supplying medium, preferably water. The preparation temperature during a first preparation stage is below the boiling temperature of the water, and during a following second preparation stage is held below the temperature of the first preparation stage but above 55.degree. C. During the first preparation stage, the water starts at a temperature of approx. 55.degree. C. and is heated at a high heating rate to a temperature of at least 90.degree. C. during a first period with the result that the eggs rapidly reach a core temperature of approx. 58.degree. to 75.degree. C. At the start of the second preparation stage, the water temperature is reduced at a high cooling rate to a final temperature of between 80.degree. C. and 55.degree. C. The eggs are cooked at this final temperature for a predetermined second period to destroy remaining salmonella The cover (8) is opened automatically to remove the eggs not until after the end of the second period.
摘要:
A process for the drying of water-containing materials which are suitable for use as wetting agents, detergents or cleaning products. An aqueous solution, emulsion or suspension of the materials is dried using superheated steam as the drying gas wherein the drying gas is recycled to the drying zone after removal therefrom of evaporated water and the energy required for the evaporation of water is supplied to the superheated steam by heat exchangers.
摘要:
The present invention relates to a granular adsorbent having a high uptake capacity for liquid ingredients of detergents and cleaning preparations, comprising(a) 60 to 80 wt. % of a cation-exchanging, synthetic aluminosilicate selected from the group consisting of zeolite A, zeolite X and mixtures thereof, said aluminosilicate containing water of hydration;(b) 0.05 to 5 wt. % of sodium silicate having a Na.sub.2 O to SiO.sub.2 mol ratio within the range of about 1:2 to about 1:3.5;(c) 3 to 15 wt. % of a homopolymer of a monomer selected from the group consisting of acrylic acid, methacrylic acid and maleic acid; or a copolymer made by polymerizing a mixture containing at least one of said monomers, and(d) 8 to 18 wt. % of water removable at a temperature of about 145.degree. C.The adsorbent may optionally include up to 5 wt. % of a nonionic surfactant. The adsorbent has an average particle size within the range of about 0.2 to 1.2 mm, and a bulk density in the range of about 400 to 700 g/l.
摘要:
Thermoplastic, high-impact moulding compositions of (A) 5 to 80 parts by weight of a graft product of 70 to 30% by weight of a mixture of an aromatic vinyl compound and acrylonitrile and/or methacrylonitrile on 30 to 70% by weight of a rubber having a glass transition temperature of below -10.degree. as the graft base and (B) 20 to 95 parts by weight of a terpolymer of styrene and/or .alpha.-methylstyrene, p-methylstyrene and acrylonitrile and/or methacrylonitrile, the terpolymer having been produced by mass polymerization.
摘要:
A tablet composition containing 2% to 100% by weight of amorphous crystalline or partly crystalline layer-form sodium silicates corresponding to the formula Na.sub.2 Si.sub.x --O.sub.2x+1.yH.sub.2 O wherein x is a number of 1.9 to 4 and y is a number of 0 to 20, with the proviso that the tablet composition only contains water in a quantity such that the maximum theoretical water-binding capacity of the components of the composition is not exceeded.
摘要:
A process for processing polymers of the ABS type present in emulsion form and effectively stabilized against oxidative attack with optionally continuous recovery and direct reuse of untreated monomers, wherein a combination of at least one phenolic antioxidant having a molecular weight above 300 without ester groups in the molecule and at least one sulfur-containing co-stabilizer having a molecular weight above 500 without ester groups in the molecule is added to the ABS polymer emulsion for stabilization against oxidative degradation.
摘要:
A process for the preparation of polymer powders from polymer dispersions by feeding a polymer dispersion continuously into an atomization apparatus and separately therefrom but at the same time also introducing a liquid agent, the dispersion and the liquid agent being completely mixed within at the most one second and the mixture being immediately thereafter dried with evaporation of the volatile constituents to form a powder composed of particles having an average diameter of from 0.05 to 1 mm, and the polymer powders prepared by this process.