US4874811A
Expired / Lapsed
US
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Alkaline aqueous universal adhesive containing poly(meth-)acrylate
Assignee: Henkel Pritt Produktions GmbH
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Filing: 1989-04-21
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Granted: 1989-10-17
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Expires: 2009-04-21
Abstract
Abstract An alkaline aqueous adhesive of a poly(meth-)acrylate base which contains poly(meth-)acrylate and polyvinylpyrollidone in a total amount of 5 to 40% by weight in the adhesive and in a weight ratio of 10:1 to 1:5. The poly(meth-)acrylate contains free carboxyl groups and has a degree of esterification of 0.55 to 0.9. The adhesive has a wide range of applications and can be transparent.
Inventors
- 👤 Jurgen Borchers
- 👤 Petra Bubolz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:38
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/062; C08L33/064; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/062; C09J133/064; C08L2666/00; C08L2666/02; C08L2666/04; C08L39/00; C08L39/04; C08L39/06
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
50 words
An alkali aqueous universal poly(meth-)acrylate based adhesive which consists essentially of an aqueous solution of 5 to 40% by weight of a mixture of a poly(meth-)acrylate having a free carboxyl group and a degree of esterification of 0.55 to 0.85 and polyvinylpyrollidone in a weight ratio of 10:1 to 1:5.
Claim 2
Dependent Claim
50 words
An alkali aqueous universal poly(meth-)acrylate based adhesive which consists essentially of an aqueous solution of 5 to 40% by weight of a mixture of a poly(meth-)acrylate having a free carboxyl group and a degree of esterification of 0.55 to 0.85 and polyvinylpyrollidone in a weight ratio of 10:1 to 1:5.
Claim 3
Dependent Claim
14 words
The adhesive defined in claim 1 wherein said poly (meth-)acrylate is a low-molecular-weight poly(meth-)acrylate.
Claim 4
Dependent Claim
14 words
The adhesive defined in claim 1 wherein said polyvinyl pyrollidone is a low-molecular-weight polyvinylpyrollidone.
Claim 5
Dependent Claim
21 words
The adhesive defined in claim 1 wherein said poly (meth-)acrylate is a low-molecular-weight poly(meth-)acrylate and said polyvinylpyrollidone is a low-molecular-weight polyvinylpyrollidone.
Claim 6
Dependent Claim
17 words
The adhesive defined in claim 4 wherein said poly(meth-)acrylate has a molecular weight between 2,000 and 30,000.
Claim 7
Dependent Claim
17 words
The adhesive defined in claim 5 wherein said poly(meth-)acrylate has a molecular weight between 4,000 and 12,000.
Claim 8
Dependent Claim
17 words
The adhesive defined in claim 6 wherein said polyvinylpyrollidone has a molecular weight between 1,000 and 15,000.
Claim 9
Dependent Claim
17 words
The adhesive defined in claim 7 wherein said polyvinylpyrollidone has a molecular weight between 2,000 and 12,000.
Claim 10
Dependent Claim
19 words
The adhesive defined in claim 8 wherein the degree of esterification of said poly(meth-)acrylate is between 0.65 and 0.85.
Claim 11
Dependent Claim
11 words
The adhesive defined in claim 1 wherein said adhesive is transparent.
Claim 12
Dependent Claim
62 words
An alkaline aqueous universal poly(meth-)acrylate based adhesive which consists essentially of a solution of 5 to 40% by weight of a mixture of a poly(meth-)acrylate having a free carboxyl group and a degree of esterification of 0.55 to 0.85 and polyvinylpyrollidone in a weight ratio of 10:1 to 1:5 , and ammonia in an effective amount to provide a hard-permanent adhesive bond.
Claim 13
Dependent Claim
62 words
An alkaline aqueous universal poly(meth-)acrylate based adhesive which consists essentially of a solution of 5 to 40% by weight of a mixture of a poly(meth-)acrylate having a free carboxyl group and a degree of esterification of 0.55 to 0.85 and polyvinylpyrollidone in a weight ratio of 10:1 to 1:5 , and ammonia in an effective amount to provide a hard-permanent adhesive bond.
Claim 14
Dependent Claim
40 words
The adhesive defined claim 11 wherein the weight ratio of said poly(meth-)acrylate to said polyvinylpyrollidone is 5:1 to 1:1 and the total amount of the mixture of poly(meth-)acrylate and polyvinylpyrollidone in the adhesive is 20 to 30 % by weight.
Claim 15
Dependent Claim
27 words
The adhesive defined in claim 12 wherein the poly(meth-)acrylate is esterified with at least one alcohol selected from the group which consists of lower alkylalcohols and cycloalkylalcohols.
Claim 16
Dependent Claim
24 words
The adhesive defined in claim 13 wherein said alcohol is selected from the group which consists of methanol, ethanol, propanol, isopropanol, butanols and cyclohexanol.
Claim 17
Dependent Claim
45 words
The adhesive defined in claim 14 which consists essentially of: 45.2 parts by weight water to which 1.8 parts by weight of 20% aqueous ammonia has been added, 5 parts by weight of a 40% aqueous poly(meth-)acrylate solution, and 10.5 parts by weight of polyvinylpyrollidone.
Claim 18
Dependent Claim
50 words
The adhesive defined in claim 14 which consists essentially of: 37.1 parts by weight water to which 2.9 parts by weight of 20% aqueous ammonia has been added, 45.7 parts by weight of a 45% aqueous poly(meth-)acrylate solution, and 14.3 parts by weight of a 20% aqueous solution of polyvinylpyrollidone.
Claim 19
Dependent Claim
50 words
The adhesive defined in claim 14 which consists essentially of: 9.5 parts by weight water to which 0.5 parts by weight of 20% aqueous ammonia has been added, 10 parts by weight of a 40% aqueous poly(meth-)acrylate solution, and 80 parts by weight of a 20% aqueous solution of polyvinylpyrollidone.
Claim 20
Dependent Claim
82 words
The adhesive defined in claim 14 wherein said poly(meth-)acrylate is provided in a polymeric acrylate reaction product of acrylic acid/acrylic acid methyl ester/acrylic acid ethyl ester in a molar ratio of 14/10/21 and a molecular weight of about 8,800, acrylic acid/acrylic acid methyl ester/acrylic acid isobutyl ester in a molar ratio of 4/9/14 and a molecular weight of about 9,800, or acrylic acid/acrylic acid methyl ester/acrylic acid ethyl ester in a molar ratio of 9/9/21 and a molecular weight of about 8,000.
Claim 21
Dependent Claim
28 words
The adhesive defined in claim 14 wherein said poly(meth-)acrylate is provided in a polymeric acrylate reaction product of acrylic acid and at least one ester of acrylic acid.
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) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |