71 results about "Bioaccumulation" patented technology

A novel photoacid generator containing a structure of the following formula (I), wherein R is a monovalent organic group with a fluorine content of 50 wt % or less, a nitro group, a cyano group, or a hydrogen atom, and Z1 and Z2 are individually a fluorine atom or a linear or branched perfluoroalkyl group having 1-10 carbon atoms, is provided. When used in a chemically amplified radiation-sensitive resin composition, the photoacid generator exhibits high transparency, comparatively high combustibility, and no bioaccumulation, and produces an acid exhibiting high acidity, high boiling point, moderately short diffusion length in the resist coating, and low dependency to mask pattern density.

The invention belongs to the technical field of textile fabric finishing agents, and relates to a method for preparing an intermediate fluorine-containing acrylate monomer of a water-proof and oil-proof organic fluorine fabric finishing agent. The method is characterized by comprising the following steps of: (1) in the presence of a reducing agent, preparing polyfluoroalcohol by using a perfluoroalkylacyl compound as a raw material; and (2) slowly dripping (methyl) acryloyl chloride to prepare fluorine-containing acrylate in the presence of a catalyst by using the polyfluoroalcohol prepared in the step (1) and using phenothiazine as a polymerization inhibitor. The number of long-chain perfluoroalkyl carbon atoms in the prepared fluorine-containing acrylate is less than 8, and the fluorine-containing acrylate can be degraded and has no biological accumulation. The fluorine-containing acrylate has no hidden dangers of long-chain perfluoroalkyl to destroy the environment and harm human health. Fluorine-containing acrylate copolymer emulsion prepared by using the prepared fluorine-containing acrylate monomer is used as a water-proof and oil-proof finishing agent for textiles, and the finished textiles have excellent water-proof and oil-proof performance.

The invention relates to an acrylate polymer integrating water and oil repellence with flame retardancy, which has the structural formula shown as the figure, and preparation and application thereof. The preparation of the acrylate polymer comprises the steps: at first, chlorine alkyl phosphate and alkyl alcohol amine are subject to ammonolysis reaction under certain conditions, the resultant alcohol is further subject to esterification reaction with acryloyl chloride at low temperature to prepare acrylate derivative consisting of phosphorus and nitrogen units, and finally the acrylate derivative, fluorine-containing acrylate, crosslinking monomer and long-chain acrylate monomer are subject to polymerization through emulsion. The acrylate polymer according to the invention can be diluted with water at any ratio, has no bioaccumulation toxicity, no or low VOC discharging and no formaldehyde and other harmful substances, and is an environmentally friendly, green, pollution-free water / oil-resisting antifouling flame-retardant finishing agent with high performance; in addition, the acrylate polymer not only can be used for the flame-retardant finishing of fabrics, but also has excellent water and oil repellence and eco-friendliness.

A dietary supplement for removing or preventing the bio-accumulation of heavy metals in the body includes one or more chelators, precursors therefore, with at least one chelator capable of crossing the blood brain barrier to promote capture of a heavy metal ion from a site in the central nervous system, and a vascular system promoter for assisting in distributing the chelators within the body. The chelator then crosses back through the blood brain barrier with the entrained heavy metal ion. Preferably, one or more secondary chelators promotes binding any of the heavy metal released from the primary chelator and hold it for removal via an excretion pathway. In one embodiment, the supplement includes a cilantro extract to assist the body's' natural defense systems in removing mercury from the human body. Using the dietary supplement limits the accumulation of heavy metals in the body, which are encountered in trace amounts from various environmental sources, promotes removal of heavy metals previously accumulated in the body and thereby alleviates the symptoms and conditions associated with heavy metal toxicity.

The invention discloses a comprehensive remediation method for soil polluted by heavy metals and application of the comprehensive remediation method. The comprehensive remediation method comprises the following steps of arranging an enclosing wall around the soil polluted by the heavy metals, supplying water to the soil through a water pipeline, and cultivating aquatic plants with better metal absorbency; taking out the aquatic plants, draining excessive water, enabling the soil to ventilate, and naturally drying in the air; planting plants with better absorbency to the heavy metals, pruning stems and leaves of plants at fixed period when the stems and leaves of the plants over grow, accelerating vegetative growth of the plants, and completely digging out root systems of the plants after a growing period; introducing earthworms, and watering during the period; digging out a plurality of grass pits in the soil, wherein the space between every two adjacent grass pits is 2 to 3m; cultivating maggots by adopting a straw insect rearing method, and using the maggots to purify residual heavy metals in the soil, wherein the maggots become adults and then fly away; and adopting phytoremediation, earthworm bioaccumulation and maggot bioaccumulation at the same time. According to the comprehensive remediation method, which is a soil remediation method, disclosed by the invention, the total amount of the heavy metals in the soil can be effectively reduced, and no pollution and damage to a site proposed to be remediated are caused; and the method is environmentally friendly.

Disclosed is a polyfluoroalkylphosphonic acid represented by the general formula: CnF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cP(O)(OH)2, wherein n is an integer of 1 to 6, a is an integer of 1 to 4, b is an integer of 1 to 3, and c is an integer of 1 to 3, or a salt thereof, which is a compound having a perfluoroalkyl group containing 6 or less carbon atoms, which is said to have low bioaccumulation potential, and being usable as an active ingredient of a mold-releasing agent. The polyfluoroalkylphosphonic acid is produced by hydrolyzing a polyfluoroalkylphosphonic acid diester represented by the general formula: CnF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cP(O)(OR)2, wherein R is a C1-C4 alkyl group, n is an integer of 1 to 6, a is an integer of 1 to 4, b is an integer of 1 to 3, and c is an integer of 1 to 3.

The invention provides a new bacterial strain that can prevent and control plant pathogenic fungi and kill acarids—streptomyces S1-5 and its application in resisting plant pathogenic fungi and killing acarids. Streptomyces sp.S1-5 (Streptomyces sp.S1-5), preserved in China Center for Type Culture Collection, date of preservation: May 24, 2007, preservation number CCTCC No: M 207073. The pesticide prepared by the present invention can achieve the effect of killing fungicides and killing acarids by using it once, greatly reducing agricultural costs and lightening the burden on farmers; and the duration of effect is as long as 30 days, and it is also safe for humans and animals, does not kill natural enemies and is beneficial Insects are not easy to produce resistance to control objects, do not pollute the environment, can be rapidly degraded by soil microorganisms without affecting soil fertility and microbial flora, have no bioaccumulation, and are very safe for ecology. They are a key enzyme inhibitor. Pesticides, no cross-resistance with other insecticides.

The invention discloses an environmentally-friendly durable water repellent fabric and a processing method thereof. A water repellent layer contains at least one of a polyurethane treelike macromolecular structure unit and an aliphatic paraffin structure. The fabric has the advantages of high water repellency, air permeability, washability, abrasion resistance, no use of fluoride-containing waterrepellent, no edge substances such as perfluorooctanoic acid (PFOA) and perfluorooctane sulfonates (PFOS) and precursor substances thereof, no biological accumulation and no production of fluoride-containing gas and belongs to a high-performance environmentally-friendly water repellent fabric.

Disclosed is a mold-releasing agent comprising, as active ingredients, a polyfluoroalkylphosphonic acid represented by the general formula: CnF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cP(O)(OH)2 (n: an integer of 1 to 6, a: an integer of 1 to 4, b: an integer of 1 to 3, c: an integer of 1 to 3), or a salt thereof and a polyfluoroalkylphosphonic acid oxyalkylene ester represented by the general formula: CnF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cP(O)[O(RO)mR′]d(OH)2−d (RO: a C2-C6 linear or branched oxyalkylene group, R′: a hydrogen atom, a C1-C20 alkyl group, or aralkyl group, n: an integer of 1 to 6, a: an integer of 1 to 4, b: an integer of 1 to 3, c: an integer of 1 to 3, d: an integer of 1 or 2, m: an integer of 1 to 100). This mold-releasing agent comprises, as an active ingredient, a polyfluoroalkylphosphonic acid oxyalkylene ester having a perfluoroalkyl group containing 6 or less carbon atoms, which is said to have low bioaccumulation potential, but exhibits mold release performance equivalent to that of a mold-releasing agent comprising a compound having a perfluoroalkyl group containing 8 or more carbon atoms as an active ingredient.

Disclosed is a polyfluoroalkylphosphonic acid oxyalkylene ester of the formula: CnF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cP(O)[O(RO)mR′]d(OH)2-d (RO is a C2-C6 linear or branched oxyalkylene group, R′ is a hydrogen atom or a C1-C20 alkyl group or aralkyl group, n is 1 to 6, a is 1 to 4, b is 1 to 3, c is 1 to 3, d is 1 or 2, and m is 1 to 100), which is a compound having a perfluoroalkyl group containing 6 or less carbon atoms and referred to as having low bioaccumulation potential, and exhibiting, when used as an active ingredient of a mold-releasing agent, mold release performance equivalent to that of a compound having a perfluoroalkyl group containing 8 or more carbon atoms. This compound is produced by subjecting a polyfluoroalkylphosphonic acid of the formula: CnF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cP(O)(OH)2 and a polyalkyleneglycol or a monoether thereof of the formula: HO(RO)mR′ to a condensation reaction.

Disclosed is a mold-releasing agent comprising, as active ingredients, a graft copolymer (A) in which a polyalkylene glycol or an alkyl ether thereof is graft-copolymerized with a polyfluoro-1-alkene represented by the general formula: CnF2n+1(CH2CF2)a(CF2CF2)bCH═CH2 (wherein n is an integer of 1 to 6, a is an integer of 1 to 4, and b is an integer of 1 to 3), and a polyfluoroalkylphosphonic acid represented by the general formula: CnF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cP(O)(OH)2 (wherein n is an integer of 1 to 6, a is an integer of 1 to 4, and b is an integer of 1 to 3, and c is an integer of 1 to 3) or a salt thereof (B). The mold-releasing agent comprises, as an active ingredient, a compound having a perfluoroalkyl group containing 6 or less carbon atoms, which is said to have low bioaccumulation potential, and having mold release performance equivalent to or more than that of a mold-releasing agent comprising a compound having a perfluoroalkyl group containing 8 or more carbon atoms as an active ingredient.

Disclosed are methods for developing a product having a relatively benign environmental impact. The methods evaluate the environmental hazard of various chemical components in formulated products and identify improvements in environmental safety based on those evaluations. Environmental criteria are in part developed based on three factors including; persistence, bioaccumulation and toxicity. One method includes obtaining a preliminary formula for a product, wherein the preliminary formula includes a plurality of chemical components, identifying at least one different chemical component that is capable of being substituted for the chemical component in the preliminary formulation and determining an environmental performance score for the chemical component and the different chemical component and determining an environmental performance score of the preliminary formula and a second formula, wherein the second formula utilizes the different chemical component. The formula having the highest environmental performance score is selected as the product. A second method includes tracking the use of chemical components in an existing product portfolio offered or sold by a business unit or a company, in which existing products having the lowest environmental performance scores would be targeted for replacement by reformulated products having higher environmental scores in order to improve the environmental performance of the business unit or company.

The present disclosure is directed to a cosmetic composition for controlling perspiration and odor. Despite being free of volatile silicones—which have garnered a bad reputation due to their ecotoxicity and bioaccumulability in aquatic species—the composition of the instant disclosure replicates the textural and sensorial benefits provided by the use of volatile silicones like cyclotetrasiloxane, cyclopentasiloxane and cyclohexasiloxane.

The invention relates to a method for restraining green alga growth, in particular to a method for removing green alga in the nori cultivation process. Firstly, algaecide is prepared, wherein solid sodium percarbonate is dissolved in deionized water, so that sodium percarbonate treating fluid is prepared, and the pH value of the treating fluid is between 9 and 10; the prepared algaecide is directly sprayed on green alga bodies attached to a net curtain, a whole raft frame and a whole mooring rope in the nori cultivation process 2 hours before a flood tide and the algaecide is sprayed once every 1 to 3 months. According to the method for removing the green alga in the nori cultivation process, the sodium percarbonate serves as the algaecide and is free of toxin, odor and pollution, high in water solubility, convenient to prepare, free of harm to the environment and free of biological accumulation. The method for removing the green alga in the nori cultivation process is very simple and convenient to achieve, the use cost is low, rinse is not required, and the method is slightly influenced by natural conditions and can be used in a large scale. Three days later after the algaecide is sprayed, the removal rate of the green alga is 100%, and the growth of the nori is not influenced.

Alkyl phosphonates prepared from amino acids suitable for use in inhibiting scale. The phosphonates are obtained as reaction mixtures where the level of alkyl phosphonation is deliberately controlled to provide only partial alkyl phosphonation of the amino acid. The resulting alkyl phosphonates exhibit improved environmental properties compared to the fully substituted species, while still exhibiting acceptable efficacy in the control of scale. The compositions possess advantages over existing phosphonates in that they exhibit higher biodegradation by method OECD 306. They also offer lower toxicity to marine life compared to the fully substituted species and are not expected to bioaccumulate.

Disclosed is an emulsion formed using, as an emulsifier, 0.01 to 30 parts by weight of a perfluoroalkylethyl phosphonic acid salt represented by the general formula: CnF2n+1CH2CH2P(O)(OM1)(OM2) [III] (M1: a hydrogen atom, ammonium salt, or organic amine salt, M2: an ammonium salt or organic amine salt, n: 1 to 6), based on 100 parts by weight of a perfluoropolyether oil represented by the general formula: RfO(C3F6O)p(C2F4O), (CF2O), Rf′ [I] (Rf and Rf′: C1-C5 perfluoroalkyl groups, p+q+r: 2 to 200) or the general formula: F(CF2CF2CF2O)nCF2CF3 [II](n: 2 to 100), or a perfluorocarbon compound. In spite of using, as an emulsifier, a compound having a perfluoroalkyl group containing 6 or less carbon atoms, which is said to have low bioaccumulation potential, the emulsion exhibits excellent emulsification stability, and therefore can be effectively used as a surface-treating agent, such as a mold-releasing agent.