Anaerobic paste compositions

{
  "publication_number": "US11286382B2",
  "country": "US",
  "kind": "B2",
  "title": "Anaerobic paste compositions",
  "abstract": "Anaerobic paste compositions and uses are disclosed. The anaerobic paste compositions remain stable at room temperature for a prolong time without phase separating, making these compositions particularly well suited for long term storage and exposure to extreme temperatures as anaerobic tubular thread sealants compositions.",
  "claims": [
    "1. An anaerobic paste composition comprising: a) an acrylate; b) a plasticizer; c) a curing agent; and d) a mixture of rheology modifiers of cetyl alcohol and a plurality of synthetic mica fillers having jagged edges with flattened geometric polyhedron shapes.",
    "2. The anaerobic paste composition of claim 1, wherein the anaerobic paste composition is free of any naturally occurring mica fillers.",
    "3. The anaerobic paste composition of claim 1, wherein the acrylate is difunctional (meth)acrylate.",
    "4. The anaerobic paste composition of claim 3, wherein the difunctional (meth)acrylate is selected from the group consisting of polyethylene glycol di(meth)acrylates, di(meth)acrylates, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, dipropylene glycol dimethacrylate, di-(pentamethylene glycol) dimethacrylate, tetraethylene diglycol diacrylate, tetramethylene dimethacrylate, ethylene dimethacrylate, neopentyl glycol diacrylate, bisphenol-A mono and di(meth)acrylates, and mixtures thereof.",
    "5. The anaerobic paste composition of claim 4, wherein the difunctional (meth)acrylate is polyethylene glycol di(meth)acrylates.",
    "6. The anaerobic paste composition of claim 1, wherein the plasticizer is selected from the group consisting of trimelliates, maleates, organophosphates, glycol, polyether, and mixtures thereof.",
    "7. The anaerobic paste composition of claim 1, wherein the plasticizer is tetraethylene glycol dioctanoate.",
    "8. The anaerobic paste composition of claim 1, wherein the curing agent is a free radical initiator, free radical co-accelerator, an inhibitor, a free radical stabilizer or a chelator.",
    "9. The anaerobic paste composition of claim 1, wherein the rheology modifier further comprises propoxylated bisphenol-A fumarate, bisphenol-A fumarate polyester resin or fumed silica.",
    "10. The anaerobic paste composition of claim 1 further comprising an additive selected from the group consisting of antioxidants, colorant, stabilizers, and mixtures thereof.",
    "11. The anaerobic paste composition of claim 1 comprising: a) about 15 to about 35 wt % of the acrylate; b) about 1 to about 10 wt % of the plasticizer; c) about 0.2 to about 20 wt % of the curing agent; and d) about 20 to about 90 wt % of the mixture of rheology modifier.",
    "12. An article of manufacture comprising the anaerobic paste composition of claim 1.",
    "13. The article of claim 12, wherein the article comprises a tubular thread.",
    "14. The article of claim 12, wherein the article comprises a fastener selected from the group consisting of nuts, bolts, rods, pins, collars, studs, pipes and anchors."
  ],
  "description_excerpt": "The present invention relates to anaerobic paste compositions. More particularly the invention relates to anaerobic tubular thread sealant paste compositions having a fast cure profile and long-term stability without phase-separating, making these compositions particularly well suited for long-term storage and exposure to extreme temperatures.\n\nAnaerobic adhesives and sealants are used in tubular threads, in fasteners and joints, to prevent loosening from vibration, and to protect the thread from corrosion or rust that can result from moistures. Anaerobic paste compositions remain as paste in the presence of air (oxygen), but as the joints are threaded to remove oxygen, the paste compositions polymerize and form solid resins with excellent sealing properties.\n\nAnaerobic adhesive and sealant compositions generally are well-known. See e.g., R. D. Rich, “Anaerobic Adhesives” in Handbook of Adhesive Technology, 29, 467-79, A. Pizzi and K. L. Mittal, eds., Marcel Dekker, Inc., New York (1994), and references cited therein. Their uses and new applications continue to be developed.\n\nAnaerobic paste compositions are heavily filled with rheology modifiers and fillers to provide high viscosity. Over time, however, the rheology modifiers and fillers can separate from the resin, especially when exposed to temperature variations. Separation causes some liquids to pool on the surface of the paste and this can vary the curing rate of the anaerobic paste. Depending on the degree of paste separation, the curing rate becomes unpredictable and can decrease or fail completely.",
  "cpc": [
    "C08L 33/10",
    "C08K 2003/2237",
    "C08K 2003/2241",
    "C08K 3/04",
    "C08K 3/22",
    "C08K 3/36",
    "C08K 5/05",
    "C08K 5/103",
    "C08L 33/00",
    "C09J 11/06",
    "C09J 133/10",
    "C09J 4/00",
    "C09K 2003/1065",
    "C09K 2200/0625",
    "C09K 3/10",
    "C09K 3/1006",
    "F16B 33/004",
    "F16B 33/06"
  ],
  "ipc": [
    "C08K 3/04",
    "C08K 3/22",
    "C08K 3/36",
    "C08K 5/05",
    "C08K 5/103",
    "C08L 33/10",
    "C09J 11/06",
    "C09J 133/10",
    "C09K 3/10",
    "F16B 33/00"
  ],
  "assignees": [
    "Henkel AG and Co KGaA"
  ],
  "inventors": [
    "Roger J. Grismala"
  ],
  "filing_date": "2020-10-01",
  "publication_date": "2022-03-29",
  "grant_date": "2022-03-29",
  "priority_date": "2018-05-29",
  "application_number": "US-202017060675-A",
  "family_id": "68698969",
  "cited_by_count": 0,
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}