US6084010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt adhesive comprising an encapsulated ingredient
Assignee: HB Fuller Co
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Filing: 1998-08-03
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Granted: 2000-07-04
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Expires: 2018-08-03
Abstract
Abstract The present invention is a hot melt adhesive composition comprising at least one ingredient present in an encapsulated form. The encapsulated ingredient may be any known hot melt adhesive formulation ingredient as well as any hot melt adhesive additive such as antioxidants and fragrances for which there is a desirable change in adhesive properties by isolating such ingredient for a duration of time. The encapsulated ingredient is released from the shell by means of pressure, temperature, diffusion, pH, light, radiation, ultrasound, and combinations thereof. Hot melt adhesive compositions comprising at least one encapsulated ingredient are useful for a variety of novel products including self-supported friction glue sticks, non-tacky pelletized pressure sensitive adhesives, cohesive adhesive systems, hot melt adhesive compositions exhibiting improved thermal stability and odor, as well as for a variety of other adhesive applications.
Inventors
- 👤 John P. Baetzold
- 👤 Thomas F. Kauffman
- 👤 Steven L. Scholl
- 👤 Eugene R. Simmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:26
CPC Classifications
C; C09; C09J; C09J9/00; C09J9/005; C09J11/00; C09J201/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
81 words
A glue-stick comprising an adhesive composition comprising at least one thermoplastic polymer selected from the group consisting of block copolymers, amorphous polyolefins, metallocene polyolefins, ethylene vinyl-acetate, ethylene-methyl acrylate, ethylene-n-butyl acrylate, polyethylene terephthalate, polyvinyl pyrrolidone, polyvinyl pyrrolidone/vinyl acetate, polyetheroxazoline, water dispersible copolyester, water soluble polyamides, polyvinylalcohol, polyethylene oxide and at least one normally liquid ingredient selected from the group consisting of liquid tackifying resins, liquid polymers, liquid plasticizers, and mixtures thereof; wherein said normally liquid ingredient is present in an encapsulated form.
Claim 2
Dependent Claim
81 words
A glue-stick comprising an adhesive composition comprising at least one thermoplastic polymer selected from the group consisting of block copolymers, amorphous polyolefins, metallocene polyolefins, ethylene vinyl-acetate, ethylene-methyl acrylate, ethylene-n-butyl acrylate, polyethylene terephthalate, polyvinyl pyrrolidone, polyvinyl pyrrolidone/vinyl acetate, polyetheroxazoline, water dispersible copolyester, water soluble polyamides, polyvinylalcohol, polyethylene oxide and at least one normally liquid ingredient selected from the group consisting of liquid tackifying resins, liquid polymers, liquid plasticizers, and mixtures thereof; wherein said normally liquid ingredient is present in an encapsulated form.
Claim 3
Dependent Claim
16 words
The glue-stick of claim 1 wherein said stick produces an adhesive deposition upon application of pressure.
Claim 4
Dependent Claim
23 words
The glue-stick of claim 1 wherein the normally liquid ingredient of the adhesive composition comprises a plasticizing oil present in an encapsulated form.
Claim 5
Dependent Claim
17 words
The glue-stick of claim 1 wherein the adhesive composition further comprises at least one solid tackifying resin.
Claim 6
Dependent Claim
21 words
The glue-stick of claim 1 wherein said adhesive composition is sufficiently rigid at ambient temperature such that said glue-stick is self-supporting.
Claim 7
Dependent Claim
95 words
A hot melt pressure sensitive adhesive composition comprising at least one thermoplastic polymer selected from the group consisting of block copolymers, amorphous polyolefins, metallocene polyolefins, ethylene vinyl-acetate, ethylene-methyl acetate, ethylene n-butyl acetate, polyethylene terephthalate, polyvinylpyrrolidone, polyvinylpyrrolidone/vinyl acetate, polyetheroxazoline, water dispersible copolyester, water soluble polyamides, polyvinylalcohol, polyethylene oxide and at least one normally liquid ingredient selected from the group consisting of liquid tackifting resins, liquid polymers, liquid plasticizers and mixtures thereof, wherein said normally liquid ingredient is present in an encapsulated form and said adhesive composition is substantially non-tacky prior to release of the encapsulated ingredient.
Claim 8
Dependent Claim
95 words
A hot melt pressure sensitive adhesive composition comprising at least one thermoplastic polymer selected from the group consisting of block copolymers, amorphous polyolefins, metallocene polyolefins, ethylene vinyl-acetate, ethylene-methyl acetate, ethylene n-butyl acetate, polyethylene terephthalate, polyvinylpyrrolidone, polyvinylpyrrolidone/vinyl acetate, polyetheroxazoline, water dispersible copolyester, water soluble polyamides, polyvinylalcohol, polyethylene oxide and at least one normally liquid ingredient selected from the group consisting of liquid tackifting resins, liquid polymers, liquid plasticizers and mixtures thereof, wherein said normally liquid ingredient is present in an encapsulated form and said adhesive composition is substantially non-tacky prior to release of the encapsulated ingredient.
Claim 9
Dependent Claim
18 words
The hot melt pressure sensitive adhesive composition of claim 6 wherein the encapsulated ingredient is a plasticizing oil.
Claim 10
Dependent Claim
22 words
The hot melt pressure sensitive adhesive composition of claim 6 wherein said ingredient is released by means of an increase in temperature.
Claim 11
Dependent Claim
22 words
The hot melt pressure sensitive adhesive composition of claim 6 wherein said ingredient is released by means of an increase in pressure.
Claim 12
Dependent Claim
28 words
The glue-stick of claim 1 wherein said adhesive composition is encased in a container selected from the group consisting of pencil barrels, pen cartridges, and plastic glue dispensers.
Claim 13
Dependent Claim
30 words
The hot melt pressure sensitive adhesive composition of claim 6 wherein the liquid ingredient is substantially surrounded by a shell material comprising a polymer, tackifying resin, wax, and mixtures thereof.
Claim 14
Dependent Claim
85 words
A pellet comprising a hot melt pressure sensitive adhesive composition comprising at least one thermoplastic polymer selected from the group consisting of block copolymers, amorphous polyolefins, metallocene polyolefins, ethylene vinyl-acetate, ethylene-methyl acrylate, ethylene-n-butyl acrylate, polyethylene terephthalate, polyvinyl pyrrolidone, polyvinyl pyrrolidone/vinyl acetate, polyetheroxazoline, water dispersible copolyester, water soluble polyamides, polyvinylalcohol, polyethylene oxide and at least one normally liquid ingredient selected from the group consisting of liquid tackifying resins, liquid polymers, liquid plasticizers, and mixtures thereof; wherein said normally liquid ingredient is present in an encapsulated form.
Claim 15
Dependent Claim
85 words
A pellet comprising a hot melt pressure sensitive adhesive composition comprising at least one thermoplastic polymer selected from the group consisting of block copolymers, amorphous polyolefins, metallocene polyolefins, ethylene vinyl-acetate, ethylene-methyl acrylate, ethylene-n-butyl acrylate, polyethylene terephthalate, polyvinyl pyrrolidone, polyvinyl pyrrolidone/vinyl acetate, polyetheroxazoline, water dispersible copolyester, water soluble polyamides, polyvinylalcohol, polyethylene oxide and at least one normally liquid ingredient selected from the group consisting of liquid tackifying resins, liquid polymers, liquid plasticizers, and mixtures thereof; wherein said normally liquid ingredient is present in an encapsulated form.
Claim 16
Dependent Claim
13 words
The pellet of claim 12 wherein the encapsulated ingredient is a plasticizing oil.
Claim 17
Dependent Claim
18 words
The pellet of claim 12 wherein the encapsulated ingredient is released by means of an increase in temperature.
Claim 18
Dependent Claim
24 words
The pellet of claim 14 wherein the shell material releases the ingredient at a temperature ranging from about 175° F. to about 350° F.
Claim 19
Dependent Claim
18 words
The pellet of claim 12 wherein the encapsulated ingredient is released by means of an increase in pressure.
Claim 20
Dependent Claim
16 words
The pellet of claim 12 wherein the hot melt adhesive composition is fed through an extruder.
Claim 21
Dependent Claim
19 words
The glue stick of claim 1 wherein the encapsulated ingredient is released by means of an increase in temperature.
Claim 22
Dependent Claim
24 words
The glue stick of claim 1 wherein the encapsulated ingredient is released at a temperature ranging from about 175° F. to about 350° F.
Claim 23
Dependent Claim
17 words
The glue stick of claim 1 wherein the release of the liquid ingredient tackifies the surrounding ingredients.
References Cited (Backward Citations)
US2800458A
Cited
DE1575625A1
Cited
US3876603A
Cited
US5271881A
Cited
JPH02292380A
Cited
EP0531618A1
Cited
US5419958A
Cited
DE4300390A1
Cited
JPH06172725A
Cited
DE4301992A1
Cited
US5578184A
Cited
US5571617A
Cited
US5532293A
Cited
US5604268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-07-04 | 2004-01-03 | 2004-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-07-04 | 2008-01-03 | 2008-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-07-04 | 2012-01-03 | 2012-07-04 | $7700.00 | Window Closed / Lapsed |