46 results about "Sodium methylallyl sulfonate" patented technology

The invention relates to a kind of ternary polymer oil displacement agent and its manufacturing method and usage. The polymer is produced by polymerizing the three constituents of a) 60-99.96% (weight) acrylamide, b) 0.006-25% (weight) methyl propylene sodium sulfonate, c) 0.01-15% (weight) N, N-dimethyl acrylamide, in which the weight percent is calculated by gross amount of the added monomer. The weigh content of sulfonation radical in the polymer is 0.5-22.7%; the constituent b), methyl propylene sodium sulfonate, is acquired by reaction of methyl allyl-chloride and sodium sulfite, with PH controlled in 8.5-10.0. The ternary polymer oil displacement agent in the invention can improve heat-resistance and salt-proof properties of oil displacement agent efficiently in oil recovery process, so it has extensive economic benefit.

The invention relates to a star polycarboxylic-acid high-performance water reducing agent which is prepared by the following steps: reacting 3.2-5% of maleic anhydride and 1.2-2% of glycerol to generate a star monomer, and polymerizing the start monomer with 26-32% of methylallylpolyether, 2.4-3% of acrylic acid, 0.4-0.8% of sodium methylallyl sulfonate and other monomers in a water solution under the actions of ammonium persulfate and mercaptopropionic acid. Compared with the prior art, the star polycarboxylic-acid high-performance water reducing agent provided by the invention overcomes thedefects of high doping amount, high slump loss, poor cement adaptability and the like in the existing water reducing agent. Besides, the invention does not use any organic solvent, is simple to operate, can easily control the reaction process, and is green and environment-friendly.

The present invention relates to a poly carboxylic acid water reducing agent adopting tartaric acid as a chain transfer agent, and a preparation method thereof. The technical scheme comprises that: 0.14 mol of methyl alkenyl polyoxyethelene, allyl polyoxyethelene ether or polyoxypropylene ether with a polymerization degree of 30-60, 0.45 mol of methacrylic acid or acrylic acid, 0.02 mol of sodium methylallyl sulfonate, and 0.15 mol of 2-acrylamide-methyl propanesulfonic acid or acrylamide are subjected to a thermal insulation reaction for 4-5 h at a temperature of 58-62 DEG C in a deionized water medium under effects of an initiator agent and tartaric acid adopted as a chain transfer agent to carry out copolymerization to obtain a polymer with a molecular weight of 70000-120000, cooling is performed, and an alkali solution is added to carry out neutralization to obtain the finished product. According to the present invention, the high performance poly carboxylic acid water reducing agent is prepared, problems of high toxicity, easy flammability, easy explosion and the like can be avoided, and environment pollution and hazards on human body can be reduced.

The present invention relates to an air entraining type poly carboxylic acid high performance water reducing agent and a preparation method thereof. According to the water reducing agent, 0.25 mol of a monomer methyl alkenyl polyoxyethelene, allyl polyoxyethelene ether or polyoxypropylene ether with a polymerization degree of 30-60, 0.70 mol of a monomer methacrylic acid or acrylic acid, 0.18 mol of a monomer sodium methylallyl sulfonate, acrylamide or 2-acrylamide-methyl propanesulfonic acid, 0.05 mol of a monomer styrene or ethyl acetate, an initiator agent and a chain transfer agent are subjected to a thermal insulation reaction for 4-5 h at a temperature of 48-52 DEG C by adopting deionized water as a reaction medium to carry out copolymerization to obtain a polymer with a molecular weight of 60000-80000, cooling is performed to a temperature of less than 40 DEG C, and a 40% sodium hydroxide solution is added to adjust the pH value to 6-8 to obtain the finished product. The air entraining type poly carboxylic acid high performance water reducing agent has a high water reducing rate, wherein the water reducing rate can be 30% when the water reduced solid doping amount is 0.2%, and the air entraining of concrete can be 5-7% when the water reduced solid doping amount is 0.2% under the premise of no other air entraining agent compounding.

The invention relates to a method for preparing anti-pilling acrylic fibers from acrylonitrile and methyl methacrylate, which comprises the following steps: (1) dissolving a polyacrylonitrile polymer in a 40-60% sodium thiocyanate water solution through a dissolver, wherein in the polyacrylonitrile polymer, the acrylonitrile content is 85-95%, the methyl methacrylate content is 5-10%, the sodium methylallyl sulfonate content is less than 1%, and the viscosity-average molecular weight of polyacrylonitrile is 45-65 thousand; (2) after debubbling and filtering a spinning solution, metering through a spinning metering pump, and extruding through spinneret orifices; (3) extruding into a coagulation bath through a spinneret plate to form nascent fibers; (4) sending the fibers into a secondary coagulation bath to form, and carrying out cold drawing, water washing and hot drawing, wherein the total drawing magnification is less than or equal to 12; (5) carrying out hot drying and compaction treatment on the fibers; and (6) thermoforming the fibers. The acrylic fibers prepared by the method have the advantages of high fracture resistance and high pilling resistance.