Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
  • C09D175/02—Polyureas
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/2805—Compounds having only one group containing active hydrogen
  • C08G18/2815—Monohydroxy compounds
  • C08G18/282—Alkanols, cycloalkanols or arylalkanols including terpenealcohols
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/30—Low-molecular-weight compounds
  • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
  • C08G18/3225—Polyamines
  • C08G18/3234—Polyamines cycloaliphatic
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/30—Low-molecular-weight compounds
  • C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
  • C08G18/3819—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen
  • C08G18/3821—Carboxylic acids; Esters thereof with monohydroxyl compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2150/00—Compositions for coatings
  • C08G2150/50—Compositions for coatings applied by spraying at least two streams of reaction components
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2150/00—Compositions for coatings
  • C08G2150/90—Compositions for anticorrosive coatings
• • 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
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]

Definitions

• the present disclosure broadly relates to curable compositions, methods of making curable compositions, and composite articles including cured curable compositions.
• Polyureas are polymers derived from the reaction product of a polyisocyanate and a polyamine through step-growth polymerization.
• the polyurea is crosslinked by using polyisocyanates and/or polyamines that have functionality greater than 2 (e.g., polyisocyanates with an average of >2 isocyanate group per polyisocyanate).
• the present disclosure provides a curable composition
• a curable composition comprising components: a) at least one aliphatic polyisocyanate;
• each compound of said at least one liquid compound is independently represented by the formula:
• n an integer > 1.
• the present disclosure provides, a method of coating a substrate, the method comprising coating a curable composition onto a surface of a substrate, and at least partially curing the curable composition, wherein the curable composition comprises components:
• each compound of said at least one liquid compound is independently represented by the formula:
• n an integer > 1.
• the present disclosure provides a composite article comprising a coating disposed on a substrate, wherein the
• coating is prepared from components comprising:
• each compound of said at least one liquid compound is independently represented by the formula:
• n an integer > 1.
• curable compositions according to the present disclosure improves physical properties (e.g., flexural modulus and tensile modulus) of the resulting polyurea after curing.
• Curable compositions according to the present disclosure are useful, for example, for those applications where strength and flexibility are important properties.
• curable compositions according to the present disclosure are suitable for application to internal pipeline surfaces so as to form an impervious lining suitable for contact with drinking water.
• FIG. 1 is a schematic side view of an exemplary composite article according to the present disclosure.
• Curable compositions according to the present disclosure typically have relatively short open times before curing advances sufficiently that the at least partially cured composition cannot be practically handled. Accordingly, they may be stored in two-part form until just prior to use. For example, components a) and b) can be separated and incorporated into respective Part A and Part B compositions. Component c), and any additional components that may be present, are typically included in PART A,
• PART B or both, although it may be supplied separately.
• Mixing PART A with PART B forms a curable composition according to the present disclosure, which typically begins to spontaneously react to formureylene (i.e., -NR-C(O)-NR-) groups, wherein R and R independently represent H or a monovalent organic group.
• Polymers containing ureylene groups are often referred to as polyureas.
• the curable composition comprises other isocyanate reactive (e.g., -OH) or amine reactive components, the reacted coating may comprise other groups as well.
• the curable composition comprises at least one aliphatic polyisocyanate.
• polyisocyanate refers to any organic compound that has two or more reactive isocyanate (i.e.,
• Exemplary aliphatic polyisocyanates include derivatives of hexamethylene- l,6-diisocyanate; 2,2,4-trimethylhexamethylene diisocyanate; isophorone diisocyanate; and 4,4'-dicyclohexylmethane diisocyanate. Reaction products and prepolymers of aliphatic polyisocyanates may be also be utilized as long as they contain a plurality of isocyanate groups.
• Aliphatic polyisocyanates typically comprise one or more derivatives of hexamethylene- 1 ,6- diisocyanate (HDI).
• the aliphatic polyisocyanate is a derivative of isophorone diisocyanate.
• the aliphatic polyisocyanate may comprise a uretdione, biuret, and/or trimer (e.g., isocyanurate) of HDL
• the curable composition is substantially solvent-free (i.e., at least 95 percent by weight free of solvent) and/or substantially free of (i.e., less than 0.5 percent by weight) 1,6- hexanediisocyanate (HDI) .
• HDI 1,6- hexanediisocyanate
• Various solvent-free aliphatic polyisocyanate(s) are available.
• One type of HDI uretdione polyisocyanate, is available from Bayer Corp. USA, Pittsburg, Pennsylvania under the trade designation DESMODUR N 3400.
• HDI polyisocyanate is a trimer, reported to have a viscosity of about 1200 millipascal-seconds (mPa-s) at 23°C, which is available from Bayer under the trade designation DESMODUR N 3600. Such polyisocyanates typically have an isocyanate content of 20- 25 percent by weight.
• Another polyisocyanate is an aliphatic prepolymer resin comprising ether groups, based on HDI, reported to have a viscosity of 2500 mPa-s at 23°C is available from Bayer Corp. USA under the trade designation DESMODUR XP 2599.
• Yet another aliphatic polyisocyanate resin based on HDI is available from Bayer Corp.
• DESMODUR N3800 This material has an NCO content of 1 1 percent by weight and a viscosity of 6000 mPa-s at 23°C.
• DESMODUR NZ1 Yet another aliphatic polyisocyanate resin based on HDI and isophorone diisocyanate is available from Bayer Corp. USA under the trade designation DESMODUR NZ1. This material has an NCO content of 20 percent by weight and a viscosity of 3000 mPa-s at 23°C.
• the curable composition comprises a mixture of an aliphatic polyisocyanate prepolymer having a viscosity of at least 2000 or 2500 mPa-s at 23°C such as, for example, DESMODUR XP 2599, in combination with a lower viscosity polyisocyanate having a viscosity of no greater than 1500 mPa-s at 23°C such as, for example, DESMODUR N 3600.
• the lower viscosity aliphatic polyisocyanate prepolymer is typically present at a weight ratio ranging from about 1 : 1 or 2: 1 to 4: 1 with a ratio of about 3 : 1 being preferred, although other ratios may also be used.
• the curable composition comprises a mixture of first aliphatic polyisocyanate prepolymer having a viscosity of at least 2000 or 2500 mPa-s at 23°C, such as, for example, DESMODUR XP 2599, in combination with a higher viscosity polyisocyanate, having a viscosity of at least 3000 mPa-s at 23°C such as, for example, DESMODUR NZ1.
• the higher viscosity polyisocyanate is typically present at a weight ratio ranging from about 2: 1 to 1 :2 with a ratio of about 2: 1 being preferred, although other ratios may also be used.
• the curable composition comprises a three-component mixture of aliphatic polyisocyanates.
• the three component mixture may comprise at least one trimer such as, for example, DESMODUR N 3600, and at least one aliphatic prepolymer resin comprising ether groups such as, for example, DESMODUR XP 2599.
• the curable composition is substantially free of (i.e., containing less than 0.5 percent by weight, preferably less than 0.1 percent by weight) nonaliphatic polyisocyanate -based amine -reactive resin(s) (e.g., aromatic polyisocyanates, monoisocyanates, and epoxy resins).
• nonaliphatic polyisocyanate -based amine -reactive resin(s) e.g., aromatic polyisocyanates, monoisocyanates, and epoxy resins.
• the curable composition is preferably free of aromatic polyisocyanates.
• the curable composition may be free of epoxy functional compounds and compounds containing unsaturated carbon-carbon bonds capable of undergoing Michael Addition with polyamines, (e.g., monomeric or oligomeric polyacrylates).
• the curable composition comprises at least one aliphatic polyamine.
• polyamine refers to compounds having at least two amino groups, each containing at least one active hydrogen (N-H group) selected from primary amino and secondary amino groups.
• N-H group active hydrogen
• PART B comprises or consists solely of one or more aliphatic polyamines.
• Exemplary aliphatic polyamines include aliphatic primary polyamines, aliphatic secondary polyamines, and combinations thereof.
• Exemplary aliphatic primary polyamines include poly(oxypropylene)diamines (e.g., as available under the trade designations JEFF AMINE D-230 and JEFF AMINE D-400 from Huntsman, The
• Exemplary secondary amines include cyclic aliphatic secondary diamines, non-cyclic aliphatic secondary diamines. Additional exemplary secondary amines include aspartic ester polyamines.
• useful cyclic aliphatic secondary diamines comprise two, optionally substituted, hexyl groups bonded by a bridging group. Each of the hexyl rings comprises a secondary amine substituent.
• the aliphatic cyclic secondary diamines may be represented by the structure
• R j and R2 independently represent linear or branched alkyl groups, having 1 to 10 carbon atoms.
• Rj and R2 are typically the same alkyl group.
• Representative alkyl groups include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, secondary butyl, tertiary butyl, and the various isomeric pentyl, hexyl, heptyl, octyl, nonyl, and decyl groups.
• R j and R2 contain at least three carbons, and the butyl group is particularly preferred (e.g., sec -butyl group).
• R3, R4, R5 and R independently represent hydrogen or a linear or branched alkyl group containing 1 to 5 carbon atoms.
• R3 and R4 are typically the same alkyl group. In some embodiments, R5 and R are hydrogen. Further, in some embodiments, R3 and R4 are methyl or hydrogen.
• the substituents are represented such that the alkylamino group may be placed anywhere on the ring relative to the CR5R bridging group. Further, the R3 and R4 substituents may occupy any position relative to the alkylamino groups. In some embodiments, the alkylamino groups are at the 4,4'-positions relative to the CR5R6 bridging group. In some embodiments, R3 and R4 occupy the 3- and 3'-positions.
• Commercially available aliphatic cyclic secondary diamines having this structure include those available as CLEARLINK 1000 and CLEARLINK 3000 from Dorf Ketal Chemicals LLC, Stafford, Texas.
• useful aliphatic cyclic secondary diamines comprise a single hexyl ring.
• the aliphatic cyclic secondary diamine typically has the general structure:
• R and Rg are independently linear or branched alkyl groups, having 1 to 10 carbon atoms or an alkylene group terminating with a -CN group.
• R7 and Rg are typically the same group.
• Representative alkyl groups include the same as those described above for Rj and R2.
• R7 and Rg are alkyl groups having at least three carbons, such as isopropyl.
• R7 and Rg are short chain (e.g., Cj -C4) alkylene groups terminating with a -CN group.
• R9, Rj 0 and Rj j are independently hydrogen or a linear or branched alkyl group having 1 to 5 carbon atoms.
• R9, Rj Q and Rj j are typically the same alkyl group.
• R9, Rj Q and Rj J are methyl or hydrogen.
• R9, Rj Q and Rj j are methyl groups.
• the substituents are represented such that the alkylamino group -NR7 may be placed anywhere on the ring relative to the -CL ⁇ NRg group.
• the alkylamino group is 2 or 3 positions away from the -CL ⁇ NRg group.
• -CL ⁇ NRg group is two positions away from the -
• NR7 group on the cyclohexane ring is available as JEFFLINK 754 from Huntsman, The Woodlands, Texas.
• Useful aliphatic cyclic secondary diamines can be prepared by reaction of isophorone diamine and a compound having a Michael acceptor group that reduces the nucleophilicity of the resulting secondary amine groups.
• Representative Michael acceptors include acrylonitrile and ⁇ , ⁇ -unsaturated carbonyl compounds, with acrylonitrile typically preferred.
• the alkylene group between the terminal -CN group and the amine group has at least two carbon atoms.
• Commercially available aliphatic cyclic secondary diamines having this structure include HXA CE 425 from Hanson Group LLC, Alpharetta, Georgia, and BAXXODUR PC- 136 from BASF, Florham Park, New Jersey.
• non-cyclic aliphatic secondary diamines include, e.g., N,N'-bis(3',3'-dimethylbutan-2- yl)-l,6-diaminohexane (e.g., as available under the trade designation ETHACURE 90, Albemarle Corporation, Baton Rouge, Louisiana).
• Aspartic ester polyamines are polyamines with secondary amino groups that can be produced, for example, by addition of primary aliphatic diamines to maleic or fumaric acid dialkyl esters, or by addition of primary aliphatic amines to unsaturated oligoesters or polyesters.
• Useful aspartic ester polyamines include, for example, aspartic ester polyamines have the general formula
• R 1 ⁇ is a divalent organic group (e.g., having up to 40 carbon atoms), each R 1 ⁇ is independently an organic group inert toward isocyanate groups at temperatures of 100°C or less, and each R ⁇ independently represents a lower alkyl group having 1 to 4 carbon atoms.
• R ⁇ may be methyl, ethyl, propyl, or butyl.
• R ⁇ represents a divalent aliphatic group (preferably having 1 to 20 carbon atoms), which can be, for example, branched, unbranched, or cyclic. More preferably, R ⁇ is selected from divalent hydrocarbon groups obtained by the removal of the amino groups from 1 ,4-diaminobutane, 1,6- diaminohexane, 2,2,4- and 2,4,4-trimethyl- 1 ,6-diaminohexane, l-amino-3,3,5-trimethyl-5- aminomethylcyclohexane, 4,4'-diamino-dicyclohexylmethane or 3,3-dimethyl-4,4'-diamino- dicyclohexylmethane.
• R ⁇ a branched C4 to Cj2 alkylene group.
• Suitable aspartic ester amine resins are commercially available from Bayer Corp. under the trade designations DESMOPHEN NH 1420, DESMOPHEN NH 1520, and DESMOPHEN NH 1220.
• DESMOPHEN NH 1420 resin is substantially composed of the following compound
• DESMOPHEN NH1520 resin is substantially composed of the following compound
• DESMOPHEN NH 1220 is substantially composed of the following compound
• aspartic ester polyamines wherein R ⁇ is a branched or unbranched group lacking cyclic structures and having less than 12, 10, 8, or 6 carbon atoms, is typically preferred for faster film set times of 2 to 5 minutes.
• the inclusion of an aspartic ester polyamine wherein comprises unsubstituted cyclic structures can be employed to extend the film set time to 5 to 10 minutes.
• the inclusion of an aspartic ester polyamine wherein R!2 comprises substituted cyclic structures can even further extend the film set time.
• such aspartic ester polyamines are employed at only small concentrations is combination with another aspartic ester polyamine that provides faster film set times, as just described, although this is not a requirement.
• the aliphatic polyamine(s) may be combined with one or more aromatic polyamines for the purposes of adjusting the set time of the composition and adjusting the mechanical properties of the cured composition.
• the coating composition further comprises at least one aromatic polyamine that is a solid at ambient temperature (25°C).
• Suitable solid aromatic polyamines include alkyl anilines such as 4,4'-methylenebis(2-isopropyl-6-methylaniline) commercially available from Lonza under the trade designation LONZACURE M-MIPA; 4,4'-methylenebis(2,6-diisopropylaniline) commercially available from Lonza under the trade designation LONZACURE M-DIPA; 4,4'- methylenebis(2-ethyl-6-methylaniline); and 4,4'-methylenebis(3-chloro-2,6-diethylaniline) commercially available from Lonza, Basel, Switzerland under the trade designation LONZACURE MCDEA.
• alkyl anilines such as 4,4'-methylenebis(2-isopropyl-6-methylaniline) commercially available from Lonza under the trade designation LONZACURE M-MIPA; 4,4'-methylenebis(2,6-diisopropylaniline) commercially available from Lonza under the trade designation LONZAC
• the aspartic ester polyamine and aromatic polyamine may be chosen such that the aromatic polyamine is dissolved in the liquid aspartic ester polyamine.
• aspartic ester polyamines such as
• DESMOPHEN NH 1220 can exhibit high solvency for solid aromatic amines.
• up to about 50 percent by weight of a solid aromatic amine such as an alkylaniline can be dissolved in the aspartic ester polyamine.
• the second part comprises at least about 5 or 10 percent by weight and typically no greater than 15 percent by weight of a solid aromatic amine or a cycloaliphatic secondary amine.
• Curable compositions according to the present disclosure include from 8 to 17 percent by weight of at least one liquid compound, based on the total weight of components a), b) and c) combined. In some embodiments, the curable compositions include from 9 to 16 percent by weight of at least one liquid compound, preferably from 10 to 15 percent by weight of the at least one liquid compound, based on the total weight of components a), b) and c) combined.
• Each compound of the at least one li uid compound is independently represented by the formula:
• Z represents an n valent organic group
• n represents an integer > 1 (e.g., 1, 2, 3, 4, 5 ,or 6).
• Z has from one to 30 carbon atoms.
• Z may comprise, for example, alkylene, oxycarbonyl, carbonyloxy, aminocarbonyl, carbonylamino, arylene, oxygen, sulfur, alkylamino, or a combination thereof.
• Z represents
• liquid compounds c) include hydroabietyl alcohol and its derivatives such as, for example, ABITOL E hydroabietyl alcohol and STAYBELITE ESTER 3-E ester of hydrogenated resins marketed by Eastman Chemical Co., Kingsport, Tennessee.
• the first and/or second part may comprise various additives.
• additives for example, pigments, dispersing and grinding aids, water scavengers, thixotropes, defoamers, etc. can be added to improve the manufacturability, the properties during application and/or the shelf-life.
• the stoichiometry of the polyurea reaction is based on a ratio of equivalents of isocyanate (e.g. modified isocyanate and excess isocyanate) of the first component to equivalents of amine of the second component.
• the first and second components are reacted at a stoichimetric ratio of at least about 1 : 1.
• the NCO equivalent ratio of aliphatic polyamine to aliphatic polyisocyanate i.e., isocyanate equivalents/amine equivalents
• isocyanate equivalents/amine equivalents is in a ratio of from 0.5 to 2.0, preferably in a ratio of from 0.8 to 1.5, although other ratios may also be used.
• PART A is preferably combined with PART B at a volume ratio of about 1 : 1, although this is not a requirement.
• PART A and PART B are preferably both liquids at temperatures ranging from 5°C to 25°C.
• both PART A and PART B are substantially free of any volatile solvent. That is to say, solidification of the system is not necessitated by drying or evaporation of solvent from either part of the system. To further lower the viscosity, one or both parts can be heated.
• the coating composition has a useful shelf life of at least 6 months, more preferably, at least one year, and most preferably, at least two years.
• Curable compositions according to the present disclosure are useful, for example, for coating a substrate. Typically, this is done by combining two-or more components (e.g., PART A and PART B) in a spray head and then spraying the curable composition (e.g., in the case of highly reactive systems), although for less reactive curable compositions other coating techniques may be suitable (e.g., a brush, spray gun, knife coater, or roller).
• exemplary composite article 100 according to the present disclosure comprises coating 1 10 disposed on surface 120 of substrate 130. Coating 1 10 is prepared from a curable composition according to the present disclosure, for example, by at least partial curing of the curable composition, such curing including at least partial reaction of components a), b), and optionally c).
• Suitable substrates may comprise one or more metal (e.g., steel), glass, fabric (e.g., geotextile fabric), ceramic, concrete, wood, plastic, earth, or a combination thereof.
• Curable compositions according to the present disclosure are suitable for use to generate pipe coatings (e.g., linings and/or exterior coatings of water distribution pipes).
• the curable composition may be applied directly to the surface of the substrate (e.g. internal surface and/or external surface of a pipe) without a primer layer applied to the surface.
• the curable composition can be prepared by combining the constituent components, for example, using a mechanical stirrer, by hand stirring (e.g., using tongue depressor), shaking, or any other suitable technique.
• spray mixing/coating techniques may be useful. This can be done using various spray coating techniques.
• the amine component (Part B) and the isocyanate component (Part A) are applied using a spraying apparatus that allows the components to combine immediately prior to exiting the apparatus.
• Part A e.g., including component a
• Part B e.g., including components b
• any additional components of the curable composition are fed independently, e.g., by flexible hoses, to a spraying apparatus capable of being propelled through an existing pipeline to be renovated.
• a remote controlled vehicle such as described in U.S. Pat. Appl. Publ. No. 2006/01 12996 al (Poole)
• the apparatus may heat the two parts of the system prior to application to the pipeline interior and mixes the two parts immediately before applying the mixture to the interior surface of the pipeline.
• the mixture of the two parts cures on the interior surface of the pipeline to form a (e.g.
• Such linings may be formed when the pipeline is initially laid, or after a period of use when the pipeline itself begins to deteriorate.
• the composition described herein can be applied at a caliper of at least 5 mm in a single pass forming a cured continuous lining.
• a heated airless spray apparatus such as a centrifugal spinning head
• An airless, impingement mixing spray system generally includes the following components: a proportioning section which meters the two components and increases the pressure to above about 1500 psi (10.34 MPa); a heating section to raise the temperatures of the two components (preferably, independently) to control viscosity; and an impingement spray gun which combines the two components and allows mixing just prior to atomization.
• a heated air vortex spray apparatus can be used to apply the coating.
• the first and second part typically each have a (Brookfield) viscosity ranging from about 10 mPa-s to about 60000 mPa-s, using spindle 6 at the temperature at which the liquid mixture is applied.
• the temperature at which the liquid mixture is applied typically ranges from about 15°C to 50°C.
• Viscosity behavior of the each of the two components is important for two part spray-coating processes.
• the two parts should be as close as possible in viscosity at high shear rates to allow adequate mixing and even cure.
• the plural component static mix/spray system appears to be more forgiving of viscosity differences between the two components. Characterization of viscosities as functions of shear rate and temperature can help with decisions as to starting point for temperatures and pressures of the coatings in the two part spray equipment lines.
• the present disclosure provides a curable composition comprising components:
• each compound of said at least one liquid compound is independently represented by the formula:
• n an integer > 1.
• the present disclosure provides a curable composition according to the first embodiment, wherein Z represents - ⁇ 3 ⁇ 40 ⁇ or
• the present disclosure provides a curable composition according to the first or second embodiment, wherein said at least one aliphatic polyamine comprises an aspartic ester.
• the present disclosure provides a curable composition according to the first or second embodiment, wherein said at least one aliphatic polyamine includes an aliphatic polyamine represented by the formula
• R j and R2 independently represent an alkyl group having 1 to 10 carbon atoms
• R3, R4, R5, and R independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms.
• the present disclosure provides a curable composition according to the fourth embodiment, wherein Rj and R2 are independently alkyl groups comprising at least 2 carbon atoms.
• the present disclosure provides a curable composition according to the fourth or fifth embodiment, wherein R3 and R4 are methyl or hydrogen.
• the present disclosure provides a curable composition according to any one of the fourth to sixth embodiments, wherein R5 and R are hydrogen.
• the present disclosure provides a curable composition according to the first or second embodiment, wherein each said at least one aliphatic polyamine has the general formula:
• R7 and Rg independently represent an alkyl group having from 1 to 10 carbon atoms, or a cyanoalkyl group having from 1 to 10 carbon atoms, and wherein R9, RJ O > an d R-l 1 are independently hydrogen or an alkyl group having from 1 to 5 carbon atoms.
• the present disclosure provides a curable composition according to the eighth embodiment, wherein R7 and Rg are independently alkyl groups comprising at least 3 carbon atoms.
• the present disclosure provides a curable composition according to the eighth or ninth embodiment, wherein R9, Rj Q and Rj j are independently an alkyl group having from 1 to
• the present disclosure provides a curable composition according to the eighth or ninth embodiment, wherein R9, Rj Q and Rj j are independently hydrogen, methyl, or isopropyl.
• the present disclosure provides a curable composition according to any one of the first to eleventh embodiments, wherein the at least one aliphatic polyisocyanate comprises a trimer of 1,6-hexanediisocyanate.
• the present disclosure provides a method of coating a substrate, the method comprising coating a curable composition onto a surface of a substrate, and at least partially curing the curable composition, wherein the curable composition comprises components:
• each compound of said at least one liquid compound is independently represented by the formula:
• n an integer > 1.
• the present disclosure provides a method according to the thirteenth embodiment, wherein Z represents -CH2OH or
• the present disclosure provides a method according to the thirteenth or fourteenth embodiment, wherein said at least one aliphatic polyamine comprises an aspartic ester.
• the present disclosure provides a method according to the thirteenth or fourteenth embodiment, wherein said at least one aliphatic polyamine includes an aliphatic polyamine represented by the general formula
• R j and R 2 independently represent an alkyl group having 1 to 10 carbon atoms
• R3, R4, R5, and R independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms.
• the present disclosure provides a method according to the sixteenth embodiment, wherein R j and R 2 are independently alkyl groups comprising at least 2 carbon atoms.
• the present disclosure provides a method according to the sixteenth or seventeenth embodiment, wherein R3 and R4 are methyl or hydrogen.
• the present disclosure provides a method according to any one of the sixteenth to eighteenth embodiments, wherein R5 and R are hydrogen.
• each said at least one aliphatic polyamine has the general formula: wherein R and Rg independently represent an alkyl group having from 1 to 10 carbon atoms, or a cyanoalkyl group having from 1 to 10 carbon atoms, and wherein R9, RJ O > an d R-l 1 are independently hydrogen or an alkyl group having from 1 to 5 carbon atoms.
• the present disclosure provides a method according to the twentieth embodiment, wherein R7 and Rg are independently alkyl groups comprising at least 3 carbon atoms.
• the present disclosure provides a method according to the twentieth or twenty- first embodiment, wherein R9, R j Q, and R j j are independently an alkyl group having from 1 to 5 carbon atoms.
• the present disclosure provides a method according to the twentieth or twenty- first embodiment, wherein R9, R j Q, and R j j are independently hydrogen, methyl, or isopropyl.
• the present disclosure provides a method according to any one of the thirteenth to twenty-third embodiments, wherein the at least one aliphatic polyisocyanate comprises a trimer of 1,6-hexanediisocyanate.
• the present disclosure provides a composite article comprising a coating disposed on a substrate, wherein the
• coating is prepared from components comprising:
• each compound of said at least one liquid compound is independently represented by the formula:
• n an integer > 1.
• the present disclosure provides a composite article according to the twenty-fifth embodiment, wherein Z represents -CH2OH or
• the present disclosure provides a composite article according to the twenty-fifth or twenty-sixth embodiment, wherein said at least one aliphatic polyamine comprises an aspartic ester.
• the present disclosure provides a composite article according to the twenty-fifth or twenty-sixth embodiment, wherein said at least one aliphatic polyamine includes an aliphatic polyamine represented by the general formula
• Rj and R 2 independently represent an alkyl group having 1 to 10 carbon atoms
• R3, R4, R5, and R independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms.
• the present disclosure provides a composite article according to the twenty-eighth embodiment, wherein R j and R 2 are independently alkyl groups comprising at least 2 carbon atoms.
• the present disclosure provides a composite article according to the twenty-eighth or twenty-ninth embodiment, wherein R3 and R4 are methyl or hydrogen.
• the present disclosure provides a composite article according to any one of the twenty-eighth to thirtieth embodiments, wherein R5 and R are hydrogen.
• each said at least one aliphatic polyamine has the general formula:
• R7 and Rg independently represent an alkyl group having from 1 to 10 carbon atoms, or a cyanoalkyl group having from 1 to 10 carbon atoms, and wherein R9, RJ O > an d R-l 1 are independently hydrogen or an alkyl group having from 1 to 5 carbon atoms.
• the present disclosure provides a composite article according to the thirty-second embodiment, wherein R7 and Rg are independently alkyl groups comprising at least 3 carbon atoms.
• the present disclosure provides a composite article according to the thirty-second or thirty -third embodiment, wherein R9, RJ O > an d R-l 1 are independently hydrogen or an alkyl group having from 1 to 5 carbon atoms.
• the present disclosure provides a composite article according to the thirty-second or thirty-third embodiment, wherein R9, Rj Q, and Rj j are independently hydrogen, methyl, or isopropyl.
• the present disclosure provides a composite article according to any one of the twenty-fifth to thirty-fifth embodiments, wherein the at least one aliphatic polyisocyanate comprises a trimer of 1,6-hexanediisocyanate.
• PA-3 Light-stable, aliphatic, cyclic, secondary diamine, commercially available from Dorf Ketal Chemicals LLC, Stafford, Texas as
• hydroabietyl alcohol derived from rosin acids that have been hydrogenated to reduce unsaturation commercially available
• MM-3 Liquid aliphatic/aromatic hydrocarbon resin with low volatility and unimodal molecular weight distribution commercially available from ExxonMobil Chemical, Houston, Texas as
• DM-1 Hollow glass microspheres made from a water resistant and
• Comparative Example CI compositions were prepared by mixing an isocyanate-containing component with an amine-containing component.
• the amine-containing component was prepared by combining 22.00 grams (g) PA-1 and 1.94 g MM-3 in a small plastic cup for use in a 150DAC
• SPEEDMIXER dual asymmetric centrifuge mixer obtained from FlackTek, Inc Landrum, South Carolina. The cup was placed in the mixer and mixed at 3500 rounds-per-minute (rpm) for 5 minutes or until homogeneous mixtures were obtained.
• the isocyanate-containing component was then added to the amine-containing component using a syringe after weighing the delivered amount (14.43 g PI-1) by difference so that the stoichiometric ratio of the amine to isocyanate was 1.0.
• the mixture vessel was then placed in a 150DAC SPEEDMIXER dual asymmetric centrifuge mixer and mixed for 30 seconds at 2750 rpm. Mixtures were poured into a silicone mold to generate parts having dimensions suitable for flexural testing. The parts were allowed to cure for 16 hrs, removed from the mold and placed in a desiccator for 7 days. Flexural properties were measured in accordance to ASTM D790-07 as described above, and are reported in Table 2.
• Comparative Examples C2-C4 compositions were prepared in the same manner as Comparative
• Example CI except that the amine-containing component was prepared by adding 22.00 g PA-1 and 4.06 g MM-3 for Comparative Example C2, 22.00 g PA-1 and 15.65 g MM-3 for Comparative Example 3, and 22.00 g PA-1 for Comparative Example 4.
• Examples 1 -2 were prepared in the same manner as Comparative Example 1 , except that the amine-containing component was prepared by combining 22.00 g PA-1 and 1.92 g MM-1 for Example 1, 22.00 g PA- 1 and 4.06 g MM- 1 for Example 2, and 22.00 g PA- 1 and 15.65 g MM- 1 for Comparative
• Example C7 in a small plastic cup and mixing in a 150DAC SPEEDMIXER dual asymmetric centrifuge mixer at 2750 rpm for 5 minutes or until homogeneous mixtures were obtained.
• the amine-containing component was prepared by combining 22.00 g PA- 1 and 4.06 g MM-1 for Example 4, 22.00 g PA- 1 and 6.43 g MM- 1 for Example 5, and 22.00 g PA- 1 and 9.1 1 g MM- 1 for Comparative Example C5, and 22.00 g PA-1 and 12.15 g MM-1 for Comparative Example C6.
• the isocyanate-containing component was then added to the amine-containing component using a syringe after weighing the delivered amount (14.43 g PI-1) by difference so that the stoichiometric ratio of the amine to isocyanate was 1.0.
• the mixture vessel was then placed in a 150DAC SPEEDMIXER dual asymmetric centrifuge mixer and mixed for 15 seconds at 2750 rpm. Mixtures were poured into a silicone mold to generate parts having dimensions suitable for flexural testing. The parts were allowed to cure for 16 hrs, removed from the mold and placed in a desiccator for 7 days. Flexural properties of Examples 4-5 and Comparative Examples C5-C6 were measured in accordance to ASTM D790-07 as described above, and are reported in Table 2.
• Examples 8-10 were prepared in the same manner as Example 1 except that the amine-containing component was prepared by combining 22.00 g PA-1 and 1.92 g MM-2 for Example 8, 22.00 g PA-1 and 4.06 g MM-2 for Example 9, and 22.00 g PA-1 and 15.65 g MM-2 for Comparative Example C8.
• Example 7 was prepared in the same manner as Comparative Example C5.
• the amine - containing component was prepared by adding 18.23 g PA-3 and 4.79 g MM-1 to a small plastic cup for use in a 150DAC SPEEDMIXER dual asymmetric centrifuge mixer. The cup was placed in the mixer and mixed at 3500 rpm for 5 minutes or until mixture was homogeneous. The mixture was then added to a barrel of a 400mL 1 : 1 volume ratio dual-cartridge syringe.
• the isocyanate-containing component was prepared by adding 22.78 g PI-1 and 2.16 g DM-1 to a small plastic cup for use in a 150DAC SPEEDMIXER dual asymmetric centrifuge mixer. The cup was placed in the mixer and mixed at 1750 rpm for 5 minutes or until mixture was homogeneous. The mixture was then added to the remaining barrel of the dual cartridge syringe.
• Parts were generated by dispensing the cartridge using a pneumatic cartridge dispenser or mechanically driven cartridge dispensing system through a 5/16 inch (0.79 cm), 32 element static mixer made of commercially available static mixer elements such as STATOMIX MC 08-32
• Example 8 was prepared in the same manner as Example 7, except for differences noted below.
• the amine-containing component was prepared by combining 19.43 g PA-2 and 5.38 g MM-1 to a small plastic cup for use in a 150DAC SPEEDMIXER dual asymmetric centrifuge mixer. The cup was placed in the mixer and mixed at 3500 rpm for 5 minutes or until mixture was homogeneous. The mixture was then added to a barrel of a 400mL 1 : 1 volume ratio dual cartridge syringe.
• the isocyanate-containing component was prepared by filling the remaining barrel with PI-1.

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