Patent US4721748A successfully refreshed from Google Patents.
US4721748A
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US
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Colloid stabilized latex adhesives
Assignee: Ingredion Inc
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Filing: 1986-11-17
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Granted: 1988-01-26
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Expires: 2006-11-17
Abstract
Abstract Latex adhesives having a Tg of -60° to 0°C. characterized by superior rheological properties, are prepared without the use of additional thickeners from a colloid stabilized latex comprising: 65-90% by weight of the latex polymer solids of an acrylate or methacrylate ester monomer polymerized in 10-35% by weight of the latex solids of a polymeric colloid, the polymeric colloid having a Tg of -40° to 0°C., a number average molecular weight of 2,000 to 10,000 and comprising (a) 50 to 85% by weight of a monomer of the formula: ##STR1## where R' is hydrogen or methyl and R" is a C 1 -C 12 straight or branched chain alkyl group; (b) 10 to 50% by weight of an ethylenically unsaturated mono- or dicarboxylic acid; (c) 5 to 30% by weight of an acrylic or methacrylic ester of a polyalkylene oxide, and (d) 0 to 30% by weight of another ethylenically unsaturated copolymerizable monomer.
Inventors
- 👤 Carmine P. Iovine
- 👤 Yen-Jer Shih
- 👤 Paul B. Foreman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:17
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F265/06; C09; C09J; C09J151/00; C09J151/003
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
209 words
A process for the preparation of latex adhesive composition having a Tg of -60° to 0° C. comprising the steps of: (i) solution polymerizing (a) 50 to 85% by weight of a monomer of the formula: ##STR4## where R' is hydrogen or methyl and R" is a C 1 -C 12 straight or branched chain alkyl group; (b) 10 to 50% by weight of an ethylenically unsaturated mono- or dicarboxylic acid; (c) 5 to 30% by weight of an acrylic or methacrylic ester of a polyalkylene oxide; and (d) 0 to 30% by weight of an ethylenically unsaturated copolymerizable monomer selected from the group consisting of hydroxyalkyl acrylates or methacrylates; acrylamide, methacrylamide and their N-substituted derivatives; with the proviso that components a-d total 100% by weight; to form an alkali soluble polymer having a Tg of -40° to 0° C. and a number average molecular weight of 2,000 to 10,000; (ii) neutralizing the solution polymer of (i) with a fugitive alkali to give a water-soluble polymer salt; and (iii) polymerizing an acrylate or methacrylate monomer or mixture thereof in an aqueous medium in the presence of a free radical catalyst and 10 to 35% by weight of the solids of the total latex of the polymeric colloid of (ii).
Claim 2
Dependent Claim
209 words
A process for the preparation of latex adhesive composition having a Tg of -60° to 0° C. comprising the steps of: (i) solution polymerizing (a) 50 to 85% by weight of a monomer of the formula: ##STR4## where R' is hydrogen or methyl and R" is a C 1 -C 12 straight or branched chain alkyl group; (b) 10 to 50% by weight of an ethylenically unsaturated mono- or dicarboxylic acid; (c) 5 to 30% by weight of an acrylic or methacrylic ester of a polyalkylene oxide; and (d) 0 to 30% by weight of an ethylenically unsaturated copolymerizable monomer selected from the group consisting of hydroxyalkyl acrylates or methacrylates; acrylamide, methacrylamide and their N-substituted derivatives; with the proviso that components a-d total 100% by weight; to form an alkali soluble polymer having a Tg of -40° to 0° C. and a number average molecular weight of 2,000 to 10,000; (ii) neutralizing the solution polymer of (i) with a fugitive alkali to give a water-soluble polymer salt; and (iii) polymerizing an acrylate or methacrylate monomer or mixture thereof in an aqueous medium in the presence of a free radical catalyst and 10 to 35% by weight of the solids of the total latex of the polymeric colloid of (ii).
Claim 3
Dependent Claim
35 words
The process of claim 1 wherein the acrylate or methacrylate monomer used in the polymeric colloid is selected from the group consisting of the methyl, ethyl, butyl, 2-ethylhexyl, octyl, decyl, dodecyl acrylate or corresponding methacrylates.
Claim 4
Dependent Claim
15 words
The process of claim 2 wherein the acrylate monomer is butyl acrylate or 2-ethylhexyl acrylate.
Claim 5
Dependent Claim
32 words
The process of claim 1 wherein the acrylate or methacrylate monomer used in the colloid is present in an amount of 60 to 80% by weight of the solids of the colloid.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein the colloid contains acrylic or methacrylic acid.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein the colloid contains polyethylene glycol methacrylate.
Claim 8
Dependent Claim
30 words
The process of claim 1 wherein the colloid contains an ethylenically unsaturated copolymerizable monomer selected from the group consisting of hydroxyalkyl acrylates or methacrylates; acrylamide, methacrylamide and their N-substituted derivatives.
Claim 9
Dependent Claim
34 words
The process of claim 1 wherein the acrylate or methacrylate comonomer of the discontinuous phase is selected from the group consisting of the methyl, ethyl, butyl, 2-ethylhexyl, octyl, decyl, dodecyl acrylate or corresponding methacrylates.
Claim 10
Dependent Claim
14 words
The process of claim 8 wherein the monomer is butyl acrylate or 2-ethylhexyl acrylate.
Claim 11
Dependent Claim
65 words
The process of claim 1 wherein a minor portion of the solids of the discontinuous phase comprises a vinyl polymerizable monomer selected from the group consisting of the esters of acrylic or methacrylic acid with C 1 -C 18 alcohols; acrylamide or methacrylamide or their corresponding N-substituted derivatives; vinyl ethers; N-vinyl lactans; halogenated vinyl compounds; alkyl vinyl ketones; diesters and polyalkylene glycol acrylates or methacrylates.
Claim 12
Dependent Claim
38 words
The process of claim 1 wherein less than 2% by weight of the solids of the discontinuous phase comprises a multifunctional monomer selected from the group consisting of diallyl maleate, triallyl cyanurate, tetraethylene glycol dimethacrylate, and hexa-allyl sucrose.
Claim 13
Dependent Claim
33 words
The process of claim 1 wherein the polymerization of step (iii) is performed at a pH of 8 to 10 and a temperature of 20° to 100° C. for 1 to 9 hours.
Claim 14
Dependent Claim
15 words
The process of claim 12 wherein the polymerization is performed at 50° to 85° C.
Claim 15
Dependent Claim
33 words
The process of claim 1 wherein the free radical catalyst is a water soluble peracid or ammonium or alkali salt thereof and is used in an amount of 0.1 to 3 weight percent.
Claim 16
Dependent Claim
14 words
The process of claim 1 wherein the free radical catalyst is a redox couple.
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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) | 1991-01-25 | 1991-07-27 | 1992-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-25 | 1995-07-27 | 1996-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-25 | 1999-07-27 | 2000-01-26 | $7700.00 | Window Closed / Lapsed |