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US4144208A Expired / Lapsed US ⏱️ 0.0 years remaining

Cold cross-linking dispersion adhesive

Assignee: Wintershall Dea International AG
•
Filing: 1977-08-15
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Granted: 1979-03-13
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Expires: 1997-08-15
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Abstract

Abstract Cold cross linking polyacrylic acid esters-based dispersion adhesives having a viscosity in the range of 800 to 1000 cps and a solids content of about 40 to 60 weight percent containing a copolymer prepared from 65 to 85 weight percent of 2-ethylhexyl acrylate; 0 to 20 weight percent of n-butylacrylate; 8 to 12 weight percent of acrylonitrile; 2 to 6 weight percent of acrylic acid; 0.5 to 2 weight percent of hydroxylakylmethacrylate; 1.0 to 5 weight percent, basis copolymer, of an internal or external acetoacetic ester cross-linking agent derived from the esterification with C 2 to C 6 diols or 1,1,1-tris(acetoxymethyl) alkanes wherein the alkane group contains from 3 to 7 carbon atoms and optionally, calophonium and other fillers or adhesive additives.

Inventors

  • 👤 Gundolf Fuchs
  • 👤 Heiko Humbert
  • 👤 Dietrich Pirck

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 09:00
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C08L2666/00; C08L2666/02; C08L2666/28; C08L93/00; C08L93/04

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 100 words
Cold cross-linking polyacrylic acid esters-based adhesive composition comprising an aqueous dispersion of about 40 to 60 percent weight solids content with a viscosity of about 800 to 1000 pcs, containing (a) a copolymer prepared from, in wt.%, 85-62 2-ethylhexylacrylate, 0-20 n-butylacrylate, 8-12 acrylonitrile, 2-6 acrylic acid, 0.5-2 acrylamide, and 0 to 2 hydroxyalkylmethacrylate, and (b) 1-5 wt.%, based on the copolymer, of an acetoacetic acid ester cross-linking agent having at least one acetocetic ester group, derived from esterifica with C 2 to C 6 diols or 1,1,1-tris(acetoacetoxy-methyl alkanes wherein in the alkane group contains from 3 to 7 carbon atoms.
Claim 2
Dependent Claim 100 words
Cold cross-linking polyacrylic acid esters-based adhesive composition comprising an aqueous dispersion of about 40 to 60 percent weight solids content with a viscosity of about 800 to 1000 pcs, containing (a) a copolymer prepared from, in wt.%, 85-62 2-ethylhexylacrylate, 0-20 n-butylacrylate, 8-12 acrylonitrile, 2-6 acrylic acid, 0.5-2 acrylamide, and 0 to 2 hydroxyalkylmethacrylate, and (b) 1-5 wt.%, based on the copolymer, of an acetoacetic acid ester cross-linking agent having at least one acetocetic ester group, derived from esterifica with C 2 to C 6 diols or 1,1,1-tris(acetoacetoxy-methyl alkanes wherein in the alkane group contains from 3 to 7 carbon atoms.
Claim 3
Dependent Claim 32 words
Adhesive composition as claimed in claim 1, wherein said cross-linking agent is a compound comprising at least two acetoacetic ester groups and is added to said dispersion upon completion of said copolymerisation.
Claim 4
Dependent Claim 12 words
The composition of claim 1, also containing colophonium, fillers and other adhesives.

References Cited (Backward Citations)

DE1643144U Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-03-12 1982-09-11 1983-03-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-03-12 1986-09-11 1987-03-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-03-12 1990-09-11 1991-03-13 $7700.00 Window Closed / Lapsed

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