Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J3/00—Processes of treating or compounding macromolecular substances
  • C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
  • C08J3/09—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids
  • C08J3/11—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids from solid polymers
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
  • A01N25/30—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests characterised by the surfactants
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/05—Alcohols; Metal alcoholates
  • C08K5/053—Polyhydroxylic alcohols
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
  • C08L71/02—Polyalkylene oxides
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2371/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
  • C08J2371/02—Polyalkylene oxides
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S516/00—Colloid systems and wetting agents; subcombinations thereof; processes of
  • Y10S516/01—Wetting, emulsifying, dispersing, or stabilizing agents
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S516/00—Colloid systems and wetting agents; subcombinations thereof; processes of
  • Y10S516/01—Wetting, emulsifying, dispersing, or stabilizing agents
  • Y10S516/02—Organic and inorganic agents containing, except water
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S516/00—Colloid systems and wetting agents; subcombinations thereof; processes of
  • Y10S516/905—Agent composition per se for colloid system making or stabilizing, e.g. foaming, emulsifying, dispersing, or gelling
  • Y10S516/914—The agent contains organic compound containing nitrogen, except if present solely as NH4+
  • Y10S516/916—The compound contains repeating -OCnH2n-, i.e. repeating unsubstituted oxyalkylene
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S516/00—Colloid systems and wetting agents; subcombinations thereof; processes of
  • Y10S516/905—Agent composition per se for colloid system making or stabilizing, e.g. foaming, emulsifying, dispersing, or gelling
  • Y10S516/917—The agent contains organic compound containing oxygen
  • Y10S516/92—The compound contains repeating unsubstituted oxyalkylene

Definitions

• This invention relates to liquefied normally solid forms of polyoxyalkylene block copolymers.
• the compositions of this invention are particularly useful in flowable pesticide concentrates.
• Pesticidally-active compounds have conventionally been formulated as emulsifiable concentrates or as wettable powders.
• the emulsifiable concentrates have normally been the type of formulation preferred for pesticides which are soluble in organic solvents. Pesticides with limited solvent solubility have usually been formulated as wettable powders. Both of these formulation types present their own special problems.
• Emulsifiable concentrates are based on one of our diminishing natural resources - petroleum. Because large amounts of solvents are required, emulsifiable concentrates can only become more expensive as time goes on. In addition to the economic considerations, it is becoming increasingly apparent that conservation of this valuable resource is imperative.
• Wettable powders are dusty and breathing the dust can cause skin and eye irritation as well as illness. Disposal of the residue containing bag is also of growing concern, because children and those unfamiliar with the potential hazards might be exposed when the bag is discarded.
• flowable formulations are becoming increasingly more prevalent. They are prepared by dispersing the finely divided pesticide ingredients in an aqueous medium to form a concentrated dispersion. For application this dispersion is further diluted with.water.
• Flowable formulations provide the following advantages: little or no organic solvent required, virtual elimination of inhalation danger, and greatly reduced skin and eye irritation problems.
• container residues can easily be hosed into the spray tank prior to disposing the container.
• polyoxyalkylene block co- - polymers especially polyols containing high amounts of ethylene oxide
• these polyols are either paste or solid products, making their uses in formulating agricultural products cumbersome and very difficult, due to gel formation upon addition of water.
• certain alcohol ethoxylates such as tridecyl alcohol, 6 mole ethoxylate or C18 alcohol 20 mole ethoxylate, plus water, are good solvents.
• agricultural chemical formulators have discovered that such alcohol ethoxylates are detrimental to long term stability of the pesticide concentrate.
• the prior art compositions have presented problems related to gelling and often have viscosities that are too high to be readily pumpable from around room temperature, i.e., 20 to 25°C up to 50°C.
• liquid compositions useful in pesticide concentrates comprising a normally solid polyoxyalkylene block copolymer nonionic surface-active agents and ethylene glycol with or without water.
• normally solid includes the paste form. It has been found also in accordance with the instant invention that these normally solid nonionic polyoxyalkylene block copolymers dissolve readily in ethylene glycol at a temperature of about 170°F or higher (170°F is about 77°C). The use of temperatures lower than 170°F results in formation of "scum” or gel formation whereas no scum or gel whatsoever is formed at 170°F or higher. Also, subsequent addition of water to the nonionic copolymer/glycol blend held at 170°F did not form any scum or gel. There is no known upper temperature limit other than one of economics, i.e., the cost of heating.
• the emulsifier of the instant invention comprises from about 15 to 90 percent by weight normally solid nonionic polyoxyalkylene block copolymer, 15 to 80 percent by weight ethylene glycol and 0 to 30 percent by weight of water.
• the preferred composition comprises from about 20 to 80 percent by weight polyoxyalkylene block copolymer, 20 to 60 percent by weight ethylene glycol and 5 to 20 percent-by weight water.
• Suitable nonionic surface active agents are cogeneric mixtures of conjugated polyoxyalkylene compounds containing in their structure the residue of an active hydrogen containing compound having from 1 to 6 carbon atoms and at least one hydrophobic oxyalkylene chain in which the oxygen/carbon atom ratio does not exceed 0.40 and at least one hydrophilic oxyalkylene chain in which the oxygen/carbon atom ratio is greater than 0.40.
• Polymers of oxyalkylene groups obtained from propylene oxide, butylene oxide, amylene oxide,styrene oxide, mixtures of such oxyalkylene groups with each other and with minor amounts of polyoxyalkylene groups obtained from ethylene oxide, butadiene dioxide, and glycidol are illustrative of hydrophobic oxyalkylene chains having an oxygen/carbon atom ratio not exceeding 0.40.
• Polymers of oxyalkylene groups obtained from ethylene oxide, butadiene dioxide, glycidol, mixtures of such oxyalkylene groups with each other and with minor amounts of oxyalkylene groups obtained from propylene oxide,butylene oxide, amylene oxide and styrene oxide are illustrative of hydrophilic oxyalkylene chains having an oxygen/carbon ratio greater than 0.40.
• conjugated polyoxyalkylene compounds which can be used in the compositions of the invention are those which correspond to the formula: wherein Y is the residue of an organic compound having from about 1 to 6 carbon atoms and containing x reactive hydrogen atoms in which x has a value of at least one, m has a value such that the oxyethylene content of the molecule is from about 20 to 90 weight percent and n has a value such that the total molecular weight of the polyoxypropylene groups is from about 950 to 4000.
• Compositions of this type are more particularly described in U.S. Patents Nos. 2,674,619 and 2,677,700.
• Suitable nonionic block copolymers which correspond to the formula: wherein Y, n, m and x have values as set forth above. Compositions of this type are more particularly described in U.S. Patent No. 3,036,118.
• compounds falling within the scope of the definition for Y include, for example, propylene glycol, ethylene glycol, diethyelne glycol, glycerine, pentaerythritol, trimethylolpropane, thyiene diamine and the like.
• the oxypropylene chains optionally, but advantageously, contain small amounts of ethylene oxide and the oxyethylene chains also optionally, but advantageously, contain small amounts of alkylene oxides such as propylene oxide and butylene oxide.
• Preferred compounds of the above type are those wherein Y is the residue of propylene glycol or ethylene glycol and x is 2.
• the compounds of this invention are those which are normally solid as defined above. Whether or not the product is a solid rather than a liquid varies, not only with the percent oxyethylene groups in the compound, but also with the molecular weight of the polyoxypropylene groups. More specifically, where the molecular weight of the polyoxypropylene groups in the first formula is 950, the percent oxyethylene groups should be greater than 55 percent. On the other hand, where the molecular weight of the polyoxypropylene groups is 4000, the percent of oxyethylene groups must be greater than 20.
• the total molecular weight of the polyoxypropylene hydrophobic units ranges from 1000 to 3100. Where the molecular weight of the polyoxypropylene groups is 1000, the percent oxyethylene groups should exceed 55, whereas when the total molecular weight of the polyoxypropylene groups is 3100, the percent polyoxyethylene groups should exceed 25 percent.
• nonionic surface-active block copolymers are those where Y, in the above formulas, is the residue of a nitrogen-containing reactive hydrogen compound having 1 to 6 carbon atoms per molecule and most preferably where Y is the residue of ethylene diamine and x is 4.
• Such compounds contain adjoined to the nitrogens of the ethylene diamine, oxypropylene units-and oxyethylene units.
• the oxypropylene units may be adjoined to the nitrogens of the ethylene diamine and outboard of said oxypropylene units are oxyethylene units. Products of this type are described in U.S. Patent No. 2,979,528. The.
• oxypropylene units would preferably have a molecular weight of 500 to 7000 and the oxyethylene units would range from approximately 25 to 80 weight percent of the compound. However, this varies with the molecular weight of the polyoxypropylene units, ie., where the molecular weight of the polyoxypropylene units is 500, the weight percent ethylene oxide units should exceed 65 percent whereas, where the molecular weight of the oxypropylene units is 7000, the oxyethylene units should exceed 25 percent by weight.
• the oxyethylene units can be adjoined to the nitrogens with the oxypropylene units outboard of said oxyethylene units.
• the pour point was determined as follows:
• a composition in accordance with the present invention is prepared by adding 60 parts by weight ethylene glycol to a reactor equipped for heating, cooling and mixing.
• the ethylene glycol is agitated and heated to 80°C and controlled to 5°C.
• Twenty-one parts of a nonionic block copolymer, referred to herein as Nonionic No. 1, is charged to the reactor at 80°C 5°C, with continued stirring.
• Nonionic No. 1 defines a block copolymer which is the polyoxyethylene adduct of a polyoxypropylene hydrophobic base, i.e., comprises polyoxyethylene groups at both ends of a polyoxypropylene base.
• the molecular weight of the hydrophobic base is about 3250 and the oxyethylene content is about 50 weight percent of the molecule.
• the product has a specific gravity of 1.076.
• the Brookfield viscosities using spindle No. 3 at an rpm of 30 were 324 cps at 25°C and 112 cps at 50°C.
• Example 1 Ten compositions, in accordance with the instant invention, are prepared in the manner described in Example 1 from the compositions shown in Table II below.
• Table II The specific gravities of the resulting product and the Brookfield viscosities using No. 3 spindle at 30 rpm at varying temperatures are also shown in Table II below.
• Nonionic No. 2 defines the polyoxyethylene adduct of a polyoxypropylene hydrophobic base having a molecular weight of the hydrophobic base of about 1750 wherein the oxyethylene content is about 50 weight percent of the molecule.
• a composition in accordance with the instant invention is prepared as described in Example 1 with the exception that the polyoxypropylene adduct of a polyoxyethylene base, i.e., comprises polyoxypropylene groups at both ends of a polyoxyethylene base, is substituted for Nonionic No. 1.
• the oxyethylene content is about 40 weight percent of the molecule and the polyoxypropylene hydrophobic groups have a molecular weight of about 3100.
• the product is readily pumpable at temperatures below 50°C, including room temperature, and possesses long term stability.
• a composition in accordance with the instant invention is prepared as described in Example 1 with the exception that the polyoxyethylene adduct of a polyoxypropylene-ethylene diamine condensate is substituted for Nonionic No. 1.
• the oxypropylene hydrophobic base has a molecular weight of about 5000 and the oxyethylene content is about 40 weight percent of the molecule.
• the product is readily pumpable at temperatures below 50°C, including room temperature, and possesses long term stability.
• a composition in accordance with the instant invention is prepared as described in Example 1 with the exception that the polyoxypropylene adduct of a polyoxyethylene-ethylene diamine condensate is substituted for Nonionic No. 1.
• the oxypropylene groups have a molecular weight of about 1500 and the oxyethylene content is about 70 percent by weight of the molecule.
• the product is readily pumpable at temperatures below 50°C, including room temperature, and. possesses long term stability.

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• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Pest Control & Pesticides (AREA)
• Agronomy & Crop Science (AREA)
• Dispersion Chemistry (AREA)
• Plant Pathology (AREA)
• Toxicology (AREA)
• Engineering & Computer Science (AREA)
• Dentistry (AREA)
• Wood Science & Technology (AREA)
• Zoology (AREA)
• Environmental Sciences (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)
• Polyethers (AREA)

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• 1980
  • 1980-10-24 US US06/200,118 patent/US4351753A/en not_active Expired - Lifetime
• 1981
  • 1981-10-19 EP EP81108486A patent/EP0051195A1/fr not_active Withdrawn
  • 1981-10-21 CA CA000388428A patent/CA1161583A/fr not_active Expired
• 1982
  • 1982-08-02 US US06/404,195 patent/US4434077A/en not_active Expired - Lifetime
  • 1982-08-02 US US06/404,196 patent/US4434078A/en not_active Expired - Lifetime

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