One-part water-based adhesive composition

• US 10,450,487 B2
• Filed: 02/26/2016
• Issued: 10/22/2019
• Est. Priority Date: 03/30/2015
• Status: Active Grant

• Current Assignee: Cemedine Co. Ltd. (Kaneka Corporation)
• Original Assignee: Cemedine Co. Ltd. (Kaneka Corporation)
• Inventors: Saito, Tomonori
• Primary Examiner(s): Loewe, Robert S
• Application Number:
  US15/562,719
• Publication Number:
  US 20180118987A1
• Time in Patent Office: 1,334 Days
• Field of Search: None
• CPC Class Codes: C08G 18/0866 the dispersing or dispersed phase being an aqueous medium
• CPC Class Codes: C08G 2170/80 Compositions for aqueous adhesives
• CPC Class Codes: C08K 5/5419 containing at least one Si—C bond
• CPC Class Codes: C09D 5/024 characterised by the additives
• CPC Class Codes: C09D 5/027 Dispersing agents anti-settling agents C09D7/45
• CPC Class Codes: C09J 11/06 organic
• CPC Class Codes: C09J 175/04 Polyurethanes
• CPC Class Codes: C09J 175/06 from polyesters
• CPC Class Codes: C09J 175/08 from polyethers

Abstract

Provided is a one-part water-based adhesive composition which suffers no yellowing and is excellent in adhesiveness and durability. The one-part water-based adhesive composition includes (A) an aqueous dispersion of a polyurethane resin and (B) a silane compound obtained by reacting a specific epoxysilane compound with an aminosilane compound represented by the following Formula (2), the amount of the epoxysilane compound being in the range of 1.5 to 10 mol per 1 mol of the aminosilane compound, at a reaction temperature of 40 to 100° C.

(In Formula (2), R⁷ to R¹² are each a hydrogen atom or an alkyl group, R¹³ is a monovalent hydrocarbon group, R¹⁴ is an alkyl group, and b is 0 or 1.)

Claims

1. A one-part water-based adhesive composition, comprising:

an aqueous dispersion of a polyurethane resin;

a thickener comprising at least one of polyacrylate, hydroxy ethylcellulose and water-soluble urethane resins; and

a silane compound represented by Formula (3)

2. A composition in accordance with claim 1, wherein the silane compound is in an amount of 0.05 to 15 parts by mass per 100 parts by mass of the solid content of aqueous dispersion of the polyurethane resin.

3. A composition in accordance with claim 2, further comprising an additive comprising one or more of fillers, stabilizers, dispersants, antifoaming agents, preservatives, thickeners, and plasticizers.

4. A composition in accordance with claim 1, further comprising:

a filler comprising at least one of calcium carbonate, magnesium carbonate, silica sand, calcium sulfate, barium sulfate, talc, aluminum hydroxide, kaoline, clay, mica, diatomaceous earth, glass, zinc oxide, magnesium oxide, titanium oxide, carbon black, synthetic fibers, glass fibers, alumina fibers, carbon fibers and whiskers.

5. A composition in accordance with claim 4, wherein an average particle size of the filler is from 1 to 50 μ

m.

6. A composition in accordance with claim 1, further comprising:

a stabilizer comprising at least one of polyoxyalkylene alkyl ethers and polyoxyethylene polyoxypropylene block copolymers.

7. A composition in accordance with claim 1, further comprising:

a dispersant comprising one or more inorganic dispersants.

8. A composition in accordance with claim 1, further comprising:

a dispersant comprising one or more of tripolyphosphates, pyrophosphates and polycarboxylates.

9. A composition in accordance with claim 1, further comprising:

an antifoaming agent comprising at least one of mineral oil-based nonionic surfactants, polydimethylsiloxane oil, ethylene oxide-modified dimethylsilicones, propylene oxide-modified dimethylsilicones, dimethylsilicone emulsions, mineral oils and acetylene alcohol.

10. A composition in accordance with claim 1, further comprising:

a preservative comprising at least one of cyclic nitrogen-based compounds and cyclic nitrogen sulfur-based compounds.

11. A composition in accordance with claim 1, further comprising:

a plasticizer comprising at least one of ethylene glycol, diethylene glycol, propylene glycol, ethylene glycol monobutyl ether and diethylene glycol monomethyl ether, ethylene glycol monomethyl acetate, diethylene glycol monoethyl acetate, di(2-ethylhexyl) adipate and diisodecyl adipate, di-n-butyl sebacate and di(2-ethylhexyl) sebacate, citric acid esters and glycerin esters.

12. A composition in accordance with claim 1, wherein the silane compound is obtained by heating and reacting an epoxysilane compound and an aminosilane compound at a reaction temperature of 40°

C. to 100°

C.

13. A one-part water-based adhesive composition, comprising:

an aqueous dispersion of a polyurethane resin;

a dispersant comprising one or more inorganic dispersants; and

a silane compound represented by Formula (3)

14. A one-part water-based adhesive composition, comprising:

an aqueous dispersion of a polyurethane resin;

a dispersant comprising one or more of tripolyphosphates, pyrophosphates and polycarboxylates; and

a silane compound represented by Formula (3)