US20100203249A1 - Two-part liquid shim compositions - Google Patents

Two-part liquid shim compositions Download PDF

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Publication number
US20100203249A1
US20100203249A1 US12/702,446 US70244610A US2010203249A1 US 20100203249 A1 US20100203249 A1 US 20100203249A1 US 70244610 A US70244610 A US 70244610A US 2010203249 A1 US2010203249 A1 US 2010203249A1
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Prior art keywords
epoxy
curative
resin
cure
epoxy resin
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Abandoned
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US12/702,446
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English (en)
Inventor
Sohaib Elgimiabi
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3M Innovative Properties Co
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3M Innovative Properties Co
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Priority to US12/702,446 priority Critical patent/US20100203249A1/en
Assigned to 3M INNOVATIVE PROPERTIES COMPANY reassignment 3M INNOVATIVE PROPERTIES COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ELGIMIABI, SOHAIB
Publication of US20100203249A1 publication Critical patent/US20100203249A1/en
Priority to US15/335,876 priority patent/US10233280B2/en
Abandoned legal-status Critical Current

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    • 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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/50—Amines
    • C08G59/56—Amines together with other curing agents
    • 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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/50—Amines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/84—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by moulding material on preformed parts to be joined
    • B29C70/845—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by moulding material on preformed parts to be joined by moulding material on a relative small portion of the preformed parts
    • 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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/182—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing using pre-adducts of epoxy compounds with curing agents
    • C08G59/184—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing using pre-adducts of epoxy compounds with curing agents with amines
    • 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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
    • C08G59/32—Epoxy compounds containing three or more epoxy groups
    • C08G59/3227—Compounds containing acyclic nitrogen atoms
    • 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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/50—Amines
    • C08G59/504—Amines containing an atom other than nitrogen belonging to the amine group, carbon and hydrogen
    • 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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/50—Amines
    • C08G59/54—Amino amides>
    • 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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/50—Amines
    • C08G59/56—Amines together with other curing agents
    • C08G59/60—Amines together with other curing agents with amides
    • 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
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/17—Amines; Quaternary ammonium compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
    • 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
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/20—Inserts
    • 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
    • C08G2650/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G2650/28—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type
    • C08G2650/50—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type containing nitrogen, e.g. polyetheramines or Jeffamines(r)

Definitions

  • This disclosure relates to curative compositions and two-part compositions comprising curative and epoxy resin parts, which may be useful in liquid shim applications, as well as methods of their use.
  • Shims are used in many facets of assembly operations to position and fill gaps between assembled parts.
  • the need for shimming is particularly acute in aerospace assembly operations due to the tight tolerance requirements and need to eliminate gaps at interfaces.
  • Shims used for assembly operations generally fall within three categories.
  • Solid shims are, in some cases, made of the same material as the interfacing parts.
  • Laminated peelable shims may be made of foil layers that can be removed one-by-one until a good fit is achieved.
  • Liquid shim materials may be useful in filling irregular or tapered interfaces. Liquid shim materials are typically used to fill gaps no bigger than 0.7 mm in width.
  • the present disclosure provides epoxy compositions, curative compositions, and two-part compositions comprising the present epoxy and curative compositions, which may be useful as liquid shim applications and methods of their use.
  • an epoxy curative comprising at least one cycloaliphatic polyamine curative and at least one second curative selected from a) an aliphatic polyamidoamine and b) an adduct of an excess of an unbranched polyetherdiamine with an epoxy resin.
  • the at least one second curative is an aliphatic polyamidoamine.
  • the at least one second curative is an adduct of an excess of an unbranched polyetherdiamine with an epoxy resin.
  • the unbranched polyetherdiamine is a compound according to Formula I:
  • the adduct of an excess of an unbranched polyetherdiamine with an epoxy resin is an adduct of between 2 and 8 parts unbranched polyetherdiamine per part of epoxy resin.
  • the epoxy curative additionally comprises at least one calcium nitrate accelerator. In some embodiments, the epoxy curative comprises no particulate metal.
  • the present disclosure provides a method of filling a gap comprising the steps of: a) mixing an epoxy component comprising an epoxy resin with an epoxy curative according to the present disclosure to make a mixture; b) filling the gap with the mixture; and c) allowing the mixture to cure.
  • the epoxy component additionally comprises a core-shell impact modifier.
  • the epoxy component comprises tetraglycidyl meta-xylenediamine, particularly where the epoxy curative is an aliphatic polyamidoamine.
  • the epoxy component comprises an epoxy novolac resin, particularly where the epoxy curative is an adduct of an excess of an unbranched polyetherdiamine with an epoxy resin.
  • the present disclosure provides a composition obtained by mixing and allowing to cure: a) an epoxy component comprising an epoxy resin and b) an epoxy curative according to the present disclosure.
  • the epoxy component additionally comprises a core-shell impact modifier.
  • the epoxy component comprises tetraglycidyl meta-xylenediamine, particularly where the epoxy curative is an aliphatic polyamidoamine.
  • the epoxy component comprises an epoxy novolac resin, particularly where the epoxy curative is an adduct of an excess of an unbranched polyetherdiamine with an epoxy resin.
  • the present disclosure provides epoxy compositions, curative compositions, and two-part compositions comprising the present epoxy and curative compositions, which may be useful as liquid shim applications.
  • the present disclosure additionally provides compositions obtained by mixing the two parts of the disclosed two-part compositions.
  • any suitable epoxy compositions may be used in the two-part compositions of the present disclosure.
  • a polyfunctional resin having three or more epoxy groups per molecule is used.
  • an epoxy novolac resin may be used.
  • an epoxy resin based on meta-xylenediamine such as ERISYS GA 240, may be used.
  • the epoxy composition may additionally comprise additives which may include impact modifiers, fillers, rheology modifiers and/or pigments.
  • the curative composition typically comprises two or more curative species, which are typically polyamines.
  • the curative composition comprises at least one cycloaliphatic polyamine.
  • the curative composition comprises at least one adduct of an excess of an unbranched polyetherdiamine with an epoxy resin, typically an excess of more than 200%, more typically more than 250%, more typically more than 280%, more typically more than 300%, in some embodiments more than 350%, and in some embodiments more than 400%.
  • the curative composition comprises at least one adduct of an excess of an unbranched polyetherdiamine with an epoxy resin, where the excess is typically less than 800%, more typically less than 700%, more typically less than 600%, more typically less than 500% and more typically less than 450%.
  • the unbranched polyetherdiamine typically has a molecular weight of less than 500, more typically less than 400, more typically less than 300, more typically less than 280, more typically less than 260, and more typically less than 240.
  • the unbranched polyetherdiamine typically has a molecular weight of at least 130, more typically at least 150, more typically at least 180 and more typically at least 200.
  • the unbranched polyetherdiamine typically has between one and four ether oxygens and more typically two or three ether oxygens.
  • the unbranched polyetherdiamine may be a compound according to Formula I:
  • the unbranched polyetherdiamine may be 4,7,10-trioxa tridecane 1,13-diamine (TTD). In some embodiments the unbranched polyetherdiamine may be 4,7-dioxa decane 1,10-diamine, commercially available as Jeffamine® EDR 176.
  • the curative composition comprises both the unbranched polyetherdiamine/epoxy adduct and at least one cycloaliphatic polyamine.
  • the curative composition may additionally comprise calcium nitrates as accelerators, as disclosed in PCT Published App. No. WO2008/089410 [Atty. Docket No. 62522WO005], the disclosure of which is incorporated herein by reference.
  • the curative composition may additionally comprise additives which may include impact modifiers, fillers, rheology modifiers and/or pigments.
  • the curative composition according to the present disclosure typically comprises no particulate metal filler or additive.
  • the curative composition according to the present disclosure typically comprises no particulate aluminum or aluminum alloy filler or additive.
  • the curative composition according to the present disclosure typically comprises no particulate iron, steel, or iron alloy filler or additive.
  • the curative composition according to the present disclosure typically comprises no particulate copper or copper alloy filler or additive.
  • liquid shim compositions will cure fully at room temperature in twenty-four to forty-eight hours and can be sanded or drilled four hours after application. In many embodiments liquid shim compositions will have about 3hours pot life (time for positioning and adjusting) and may be cured at an accelerated rate with application of mild heat, typically curing in less than 30 minutes at 70° C.
  • liquid shim compositions will demonstrate characteristics prior to cure including a combination of low viscosity such as may be suitable for injection or application by syringe together with a low degree of sag or creep upon application.
  • liquid shim compositions will demonstrate characteristics after cure including: good compression strength without brittleness, reasonable strength properties at low and high temperatures ( ⁇ 55 to 120° C.), and resistance to most solvents, oils, hydraulic fluids, and the like.
  • the present compositions will demonstrate Tg after cure of greater than 120° C., more typically greater than 140° C., more typically greater than 160° C., and more typically greater than 180° C.
  • liquid shim compositions must meet the requirements of Airbus AIMS qualification 10-07-001.
  • the epoxy resin compositions presented in Table I were made by mixing in a small lab mixer. Manufacturing of formulation B4 was done in 21 doppel Z lab mogul. The Novolac resin was introduced into the mogul and blended with the Kane Ace 156. After about 30 minutes mixing Aerosil was added followed by addition of Titanium dioxide powder. The whole was then mixed for at least 40 min under vacuum. The result was a homogeneous white paste.
  • the curative compositions presented in Table II were made by mixing in a small lab mixer. Manufacture of formulations A1 and A2 was done in the same mogul described for part B4. The first step was introduction of the Ancamine 2167 and calcium nitrate. These were heated to 80° C. and mixed for 1 hour. After cooling down to room temperature (RT) Aerosil was added and mixed until homogeneity. After that the TTD and Epikote 828 adduct was introduced and mixed at RT for about 30 min. After that Minsil and Carbon Black were incorporated and mixed under vacuum for 1 hour. The TTD and Epikote 828 adduct was made by reacting 180 parts of TTD with 60 parts of Epikote 828. The two components were mixed at RT for 1 h and then heated up to 80 C. The temperature was maintained for one hour to complete the pre-polymerization reaction.
  • the present disclosure contemplates any combination of B and A parts, including B1/A0, B1/A1, B1/A2, B2/A0, B2/A1, B2/A2, B3/A0, B3/A1, B3/A2, B4/A0, B4/A1 and B4/A2.
  • B and A parts were made at a ratio of two parts by volume B to one part by volume A: B1/A0, B2/A0, B3/A0, B4/A1 and B4/A2.
  • the mixed viscosity of formulations B4/A1 and B4/A2 were measured to be below 600 Pascals (Pa), measured on Haake RheoWin instrument.
  • the pot life of the B1/A0, B2/A0 and B3/A0 formulations were determined by DSC measurement (Degree of cure). Table III reports curing potential as function of time after mixing for these three combinations.
  • the pot life of B4/A1 was observed to be approximately 120 min.
  • the pot life of B4/A2 was observed to be approximately 90 min.
  • the B1/A0 and B4/A2 formulations showed the best mechanical characteristics. Additional characterization was performed for the B4/A2 formulation, including fluid resistance and aging tests, reported in Tables VII, VIII and IX.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Epoxy Resins (AREA)
US12/702,446 2009-02-09 2010-02-09 Two-part liquid shim compositions Abandoned US20100203249A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/702,446 US20100203249A1 (en) 2009-02-09 2010-02-09 Two-part liquid shim compositions
US15/335,876 US10233280B2 (en) 2009-02-09 2016-10-27 Two-part liquid shim compositions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15107609P 2009-02-09 2009-02-09
US12/702,446 US20100203249A1 (en) 2009-02-09 2010-02-09 Two-part liquid shim compositions

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US (2) US20100203249A1 (ko)
EP (1) EP2393863B1 (ko)
JP (2) JP6162360B2 (ko)
KR (2) KR20170049641A (ko)
CN (2) CN103232588B (ko)
BR (1) BRPI1007981A2 (ko)
CA (1) CA2751849C (ko)
ES (1) ES2644010T3 (ko)
PL (1) PL2393863T3 (ko)
PT (1) PT2393863T (ko)
WO (1) WO2010091395A1 (ko)

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US20090040247A1 (en) * 2007-08-07 2009-02-12 Mark Cato Micro shim for moving coil actuator
US20130098676A1 (en) * 2010-09-23 2013-04-25 Henkel Corporation Chemical vapor resistant epoxy composition
WO2013082396A1 (en) * 2011-11-30 2013-06-06 3M Innovative Properties Company Epoxy curative composition and compositions therefrom
WO2014210298A1 (en) 2013-06-28 2014-12-31 3M Innovative Properties Company High modulus epoxy adhesives for shimming applications
US9375848B2 (en) 2012-06-25 2016-06-28 Systems Machine Automation Components Corporation Robotic finger
US9731418B2 (en) 2008-01-25 2017-08-15 Systems Machine Automation Components Corporation Methods and apparatus for closed loop force control in a linear actuator
US9748823B2 (en) 2012-06-25 2017-08-29 Systems Machine Automation Components Corporation Linear actuator with moving central coil and permanent side magnets
US9780634B2 (en) 2010-09-23 2017-10-03 Systems Machine Automation Components Corporation Low cost multi-coil linear actuator configured to accommodate a variable number of coils
US9871435B2 (en) 2014-01-31 2018-01-16 Systems, Machines, Automation Components Corporation Direct drive motor for robotic finger
US10205355B2 (en) 2017-01-03 2019-02-12 Systems, Machines, Automation Components Corporation High-torque, low-current brushless motor
US10215802B2 (en) 2015-09-24 2019-02-26 Systems, Machines, Automation Components Corporation Magnetically-latched actuator
US10429211B2 (en) 2015-07-10 2019-10-01 Systems, Machines, Automation Components Corporation Apparatus and methods for linear actuator with piston assembly having an integrated controller and encoder
US10675723B1 (en) 2016-04-08 2020-06-09 Systems, Machines, Automation Components Corporation Methods and apparatus for inserting a threaded fastener using a linear rotary actuator
US10807248B2 (en) 2014-01-31 2020-10-20 Systems, Machines, Automation Components Corporation Direct drive brushless motor for robotic finger
US10865085B1 (en) 2016-04-08 2020-12-15 Systems, Machines, Automation Components Corporation Methods and apparatus for applying a threaded cap using a linear rotary actuator

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CN106554482B (zh) * 2016-11-25 2019-01-08 中国建材检验认证集团厦门宏业有限公司 一种高性能星型水性环氧固化剂的制备方法
WO2024039927A1 (en) * 2022-08-16 2024-02-22 Ppg Industries Ohio, Inc. Coating compositions

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US4940770A (en) * 1988-11-14 1990-07-10 Texaco Chemical Co. Novel compositions from polyoxyalkylene amines and epoxides
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CN102307923A (zh) 2012-01-04
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US20170044306A1 (en) 2017-02-16
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CA2751849A1 (en) 2010-08-12
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JP6162360B2 (ja) 2017-07-12
BRPI1007981A2 (pt) 2018-02-14

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