US4052527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation polymerized hot melt pressure sensitive adhesives
Assignee: Ingredion Inc
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Filing: 1977-02-07
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Granted: 1977-10-04
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Expires: 1997-02-07
Abstract
Abstract The present invention is directed to hot melt pressure sensitive adhesive compositions formed by copolymerizing at least one 3-(chlorinated aryloxy)-2-hydroxypropyl ester of an alpha, beta unsaturated carboxylic acid with acrylate based copolymerizable monomers, heating the resultant ethylenically saturated prepolymer to a temperature sufficient to render it fluid and flowable; coating onto a substrate and exposing to ultraviolet radiation.
Inventors
- 👤 Stephen D. Pastor
- 👤 Martin M. Skoultchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:33
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/14; C09J133/16; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/111; Y10S522/00; Y10S522/904; Y10S522/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
91 words
A method for the production of hot melt adhesive products having pressure sensitive properties comprising the steps of a. copolymerizing at least one 3-(chlorinated aryloxy)-2-hydroxypropyl ester of an alpha, beta unsaturated carboxylic acid with at least one acrylate based copolymerizable monomer, b. heating the resultant ethylenically unsaturated prepolymer to a temperature sufficient to render it fluid and flowable, c. coating the heated prepolymer onto a substrate, and d. exposing the coated substrate to ultraviolet radiation of wavelength 1800 to 4000 A for a period of time sufficient to crosslink the prepolymer.
Claim 2
Independent Claim
91 words
A method for the production of hot melt adhesive products having pressure sensitive properties comprising the steps of a. copolymerizing at least one 3-(chlorinated aryloxy)-2-hydroxypropyl ester of an alpha, beta unsaturated carboxylic acid with at least one acrylate based copolymerizable monomer, b. heating the resultant ethylenically unsaturated prepolymer to a temperature sufficient to render it fluid and flowable, c. coating the heated prepolymer onto a substrate, and d. exposing the coated substrate to ultraviolet radiation of wavelength 1800 to 4000 A for a period of time sufficient to crosslink the prepolymer.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein the prepolymer contains at least one monomer selected from the group consisting of the C 4 -C 9 alkyl esters of acrylic and methacrylic acid.
Claim 4
Dependent Claim
28 words
The method of claim 1 wherein the acrylic monomer is present in the prepolymer in an amount of at least about 50% by weight of the total prepolymer.
Claim 5
Dependent Claim
34 words
The method of claim 1 wherein the 3-(chlorinated aryloxy-2-hydroxypropyl ester of acrylic or methacrylic acid is selected from the group consisting of 3-(pentachlorophenoxy)-2-hydroxypropyl acrylate, 3-(2,4,6-trichlorophenoxy)-2-hydroxypropyl acrylate, 3-(3,4-dichlorophenoxy-2-hydroxypropyl acrylate, 3-(2,3,4,5-tetrachlorophenoxy)-2-hydroxypropyl acrylate and the corresponding methacrylates.
Claim 6
Dependent Claim
29 words
The method of claim 1 wherein the 3-(chlorinated aryloxy)-2-hydroxypropyl ester of acrylic or methacrylic acid is present in an amount of 0.1 to 10.0% by weight of the prepolymer.
Claim 7
Dependent Claim
25 words
The method of claim 1 wherein the ethylenically saturated prepolymer is heated to a temperature of 120° -180° C. to render it fluid and flowable.
Claim 8
Dependent Claim
20 words
The method of claim 1 wherein the coated prepolymer is exposed to an ultraviolet source of 2000 to 3500 A.
Claim 9
Dependent Claim
13 words
The crosslinked pressure sensitive adhesive product prepared by the method of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |