US3897295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionizing radiation method for forming acrylic pressure sensitive adhesives and coated substrates
Assignee: PPG Industries Inc
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Filing: 1972-06-02
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Granted: 1975-07-29
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Expires: 1992-06-02
Abstract
Abstract Pressure-sensitive adhesives having improved adhesive properties are formed by subjecting a mixture comprising a monomer selected from the group consisting of alkyl acrylates, hydroxyalkyl acrylates, alkoxyalkyl acrylates, cyanoalkyl acrylates, alkyl methacrylates, hydroxyalkyl methacrylates, alkoxyalkyl methacrylates, cyanoalkyl methacrylates, Nalkoxymethylacrylamides, and N-alkoxymethylmethacrylamides, and a homopolymer or copolymer selected from the group consisting of polymers of alkyl acrylates, hydroxyalkyl acrylates, alkoxyalkyl acrylates, cyanoalkyl acrylates, alkyl methacrylates, hydroxyalkyl methacrylates, alkoxyalkyl methacrylates, cyanoalkyl methacrylates, acrylamide, methacrylamide, N-(substituted alkyl) acrylamides, N-(substituted alkyl)methacrylamides, alkyl acrylamides, alkyl methacrylamides, and N-alkoxymethylacrylamides and N-alkoxymethylmethacrylamides to ionizing irradiation. The adhesive material finds utility as binding resins in laminates, coatings on substrates, and as film adhesives.
Inventors
- 👤 Rostyslaw Dowbenko
- 👤 Roger M Christenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:32
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F265/10; C09; C09J; C09J2301/00; C09J2301/30; C09J2301/302
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
39 words
A MONOMER SELECTED FROM THE CLASS CONSISTING OF ALKYL ACRYLATES, HYDROXYALKYL ACRYLATES, ALKKOAYALKYL ACRYLATES, CYANOALKYL ACRYLATES, ALKYL METHACRYLATES, HYDROXYALKYL METHACRYLATES, ALKOXYALKYL METHACRYLATES, CYANOALKYL METHACRYLATES, N-ALKOXYMETHYLACRYLAMIDES AND N-ALKOXYMETHYLMETHACRYLAMIDES, AND FROM ABOUT 2 PERCENT TO ABOUT 50 PERCENT BY WEIGHT OF
Claim 2
Dependent Claim
39 words
A MONOMER SELECTED FROM THE CLASS CONSISTING OF ALKYL ACRYLATES, HYDROXYALKYL ACRYLATES, ALKKOAYALKYL ACRYLATES, CYANOALKYL ACRYLATES, ALKYL METHACRYLATES, HYDROXYALKYL METHACRYLATES, ALKOXYALKYL METHACRYLATES, CYANOALKYL METHACRYLATES, N-ALKOXYMETHYLACRYLAMIDES AND N-ALKOXYMETHYLMETHACRYLAMIDES, AND FROM ABOUT 2 PERCENT TO ABOUT 50 PERCENT BY WEIGHT OF
Claim 3
Independent Claim
32 words
THE METHOD OF FORMING A PRESSURE-SENSITIVE ADHESIVE WHICH COMPRISES APPLYING TO RELEASE PAPER A LAYER OF AN ESSENTIALLY SOLVENTLESS SYRUP OF FROM ABOUT 50 PERCENT TO ABOUT 98 PERCENT BY WEIGHT OF
Claim 4
Independent Claim
32 words
THE METHOD OF FORMING A PRESSURE-SENSITIVE ADHESIVE WHICH COMPRISES APPLYING TO RELEASE PAPER A LAYER OF AN ESSENTIALLY SOLVENTLESS SYRUP OF FROM ABOUT 50 PERCENT TO ABOUT 98 PERCENT BY WEIGHT OF
Claim 5
Dependent Claim
11 words
The method of claim 1 wherein the monomer is 2-ethylhexyl acrylate.
Claim 6
Dependent Claim
79 words
a polymer of the group consisting of homopolymers and copolymers of alkyl acrylates, hydroxyalkyl acrylates, alkoxyalkyl acrylates, cyanoalkyl acrylates, alkyl methacrylates, hydroxyalkyl methacrylates, alkoxyalkyl methacrylates, cyanoalkyl methacrylates, acrylamides, methacrylamides, N-alkoxymethylacrylamides, N-(substituted alkyl)acrylamides, N-(substituted alkyl) methacrylamides, alkyl acrylamides, alkyl methacrylamides, and N-alkoxymethylmethacrylamides; and subjecting the substrate and coating to a total dosage of high energy ionizing irradiation from about 2 to about 20 megarads and transferring the film from the release paper whereby a permenently tacky pressure-sensitive adhesive is formed.
Claim 7
Dependent Claim
79 words
a polymer of the group consisting of homopolymers and copolymers of alkyl acrylates, hydroxyalkyl acrylates, alkoxyalkyl acrylates, cyanoalkyl acrylates, alkyl methacrylates, hydroxyalkyl methacrylates, alkoxyalkyl methacrylates, cyanoalkyl methacrylates, acrylamides, methacrylamides, N-alkoxymethylacrylamides, N-(substituted alkyl)acrylamides, N-(substituted alkyl) methacrylamides, alkyl acrylamides, alkyl methacrylamides, and N-alkoxymethylmethacrylamides; and subjecting the substrate and coating to a total dosage of high energy ionizing irradiation from about 2 to about 20 megarads and transferring the film from the release paper whereby a permenently tacky pressure-sensitive adhesive is formed.
Claim 8
Dependent Claim
79 words
A POLYMER OF THE GROUP CONSISTING OF HOMOPOLYMERS AND COPOLYMERS OF ALKYL ACRYLATES, HYDROXYALKYL ACRYLATES, ALKOXYALKYL ACRYLATES, CYANOALKYL ACRYLATES, ALKYL METHACRYLATES, HYDROXYALKYL METHACRYLATES, ALKOXYALKYL METHACRYLATES, CYANOALKYL METHACRYLATES, ACRYLAMIDES, METHACRYLAMIDES, N-ALKOXYMETHYLACRYLAMIDES, N-(SUBSTITUTED ALKYL)ACRYLAMIDES, N-(SUBSTITUTED ALKYL) METHACRYLAMIDES, ALKYL ACRYLAMIDES, ALKYL METHACRYLAMIDES, AND NALKOXYMETHYLMETHACRYLAMIDES, AND SUBJECTING THE SUBSTRATE AND COATING TO A TOTAL DOSAGE OF HIGH ENERGY IONIZING IRRADIATION FROM ABOUT 2 TO ABOUT 20 MEGARADS AND TRANSFERRING THE FILM FROM THE RELEASE PAPER WHEREBY A PERMENENTLY TACKY PRESSURE-SENSITIVE ADHESIVE IS FORMED.
Claim 9
Dependent Claim
79 words
A POLYMER OF THE GROUP CONSISTING OF HOMOPOLYMERS AND COPOLYMERS OF ALKYL ACRYLATES, HYDROXYALKYL ACRYLATES, ALKOXYALKYL ACRYLATES, CYANOALKYL ACRYLATES, ALKYL METHACRYLATES, HYDROXYALKYL METHACRYLATES, ALKOXYALKYL METHACRYLATES, CYANOALKYL METHACRYLATES, ACRYLAMIDES, METHACRYLAMIDES, N-ALKOXYMETHYLACRYLAMIDES, N-(SUBSTITUTED ALKYL)ACRYLAMIDES, N-(SUBSTITUTED ALKYL) METHACRYLAMIDES, ALKYL ACRYLAMIDES, ALKYL METHACRYLAMIDES, AND NALKOXYMETHYLMETHACRYLAMIDES, AND SUBJECTING THE SUBSTRATE AND COATING TO A TOTAL DOSAGE OF HIGH ENERGY IONIZING IRRADIATION FROM ABOUT 2 TO ABOUT 20 MEGARADS AND TRANSFERRING THE FILM FROM THE RELEASE PAPER WHEREBY A PERMENENTLY TACKY PRESSURE-SENSITIVE ADHESIVE IS FORMED.
Claim 10
Dependent Claim
83 words
a polymer of the group consisting of homopolymers and copolymers of alkyl acrylates, hydroxyalkyl acrylates, alkoxyalkyl acrylates, cyanoalkyl acrylates, alkyl methacrylates, hydroxyalkyl methacrylates, alkoxyalkyl methacrylates, cyanoalkyl methacrylates, acrylamides, methacrylamides, N-alkoxymethyl acrylamides, N-(substituted alkyl) acrylamides, N-(substituted alkyl) methacrylamides, alkyl acrylamides, alkyl methacrylamides, and N-alkoxymethyl methacrylamides; and b. subjecting the substrate and coating to a total dosage of high energy ionizing irradiation of from about 2 to about 20 megarads; whereby a permanently tacky pressure-sensitive adhesive coating is formed on the surface of said substrate.
Claim 11
Dependent Claim
83 words
a polymer of the group consisting of homopolymers and copolymers of alkyl acrylates, hydroxyalkyl acrylates, alkoxyalkyl acrylates, cyanoalkyl acrylates, alkyl methacrylates, hydroxyalkyl methacrylates, alkoxyalkyl methacrylates, cyanoalkyl methacrylates, acrylamides, methacrylamides, N-alkoxymethyl acrylamides, N-(substituted alkyl) acrylamides, N-(substituted alkyl) methacrylamides, alkyl acrylamides, alkyl methacrylamides, and N-alkoxymethyl methacrylamides; and b. subjecting the substrate and coating to a total dosage of high energy ionizing irradiation of from about 2 to about 20 megarads; whereby a permanently tacky pressure-sensitive adhesive coating is formed on the surface of said substrate.
Claim 12
Dependent Claim
14 words
The method of claim 1 wherein the polymer is a homopolymer of 2-ethylhexyl acrylate.
Claim 13
Dependent Claim
57 words
The method of claim 1 wherein the mixture contains up to about 30 percent of the total weight of monomers of functional monomers selected from the group consisting of dialkyl maleates, dialkyl fumarates, hydroxyalkyl maleates, hydroxyalkyl fumarates, cyanoalkyl meleates, cyanoalkyl fumarates, alkyl hydrogen maleates, alkyl hydrogen fumarates, cyanoalkyl hydrogen maleates, cyanoalkyl hydrogen fumarates, N-t-butylacrylamide, and diacetone acrylamide.
Claim 14
Independent Claim
35 words
The method of forming a pressure-sensitive adhesive coated substrate which comprises a. applying to a substrate a layer of an essentially solventless syrup comprising from about 50 percent to about 98 percent by weight of
Claim 15
Independent Claim
35 words
The method of forming a pressure-sensitive adhesive coated substrate which comprises a. applying to a substrate a layer of an essentially solventless syrup comprising from about 50 percent to about 98 percent by weight of
Claim 16
Dependent Claim
10 words
The method of claim 5 wherein the monomer is N-(2-ethylhexoxymethyl)acrylamide.
Claim 17
Dependent Claim
11 words
the method of claim 5 wherein the monomer is 2-ethylhexyl acrylate.
Claim 18
Dependent Claim
21 words
The method of claim 5 wherein the polymer is a homopolymer selected from the group consisting of N-(2-ethylhexoxymethyl)acrylamide and 2-ethylhexyl acrylate.
Claim 19
Dependent Claim
20 words
The method of claim 5 wherein the coating has a film thickness of from about one to about 25 mils.
Claim 20
Dependent Claim
11 words
The method of claim 5 wherein the substrate is release paper.
Claim 21
Dependent Claim
59 words
The method of claim 5 wherein the mixture of materials comprises up to about 30 percent of the total weight of monomers of functional monomers selected from the group consisting of dialkyl maleates, dialkyl fumarates, hydroxyalkyl maleates, hydroxyalkyl fumarates, cyanoalkyl maleates, cyanoalkyl fumarates, alkyl hydrogen meleates, alkyl hydrogen fumarates, cyanoalkyl hydrogen maleates, cyanoalkyl hydrogen fumarates, N-t-butylacrylamide, and diacetone acrylamide.
Claim 22
Dependent Claim
13 words
The method of claim 5 wherein the substrate is a flexible backing material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |