Patent US3959552A successfully refreshed from Google Patents.
US3959552A
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Process for the production of cleaning-resistant nonwoven materials
Assignee: Bayer AG
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Filing: 1974-11-11
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Granted: 1976-05-25
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Expires: 1994-11-11
Abstract
Abstract An aqueous dispersion of copolymers are used as binders for the production of optionally dry-cleanable nonwoven materials. The copolymers consist of copolymerized units of 1 - 2.5% by weight of N-methylol(meth)acrylamide, 1 - 2.5% by weight of (meth)acrylamide, 0.5 - 3% by weight of α,β-monoolefinically unsaturated di- or tricarboxylic acids with 4 to 6 carbon atoms and 89.5 - 97.5% by weight of (meth)-acrylic acid esters having 1 - 18 carbon atoms in the alcohol component.
Inventors
- 👤 Ferdinand Heins
- 👤 Hellmut Striegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:59
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4326; D04H1/435; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; D04H1/425; D04H1/4258; D04H1/44; D04H1/50; D04H1/58; D04H1/587; D04H1/64; D04H1/645; D04H1/65; D04H1/70; D04H1/74; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/3175; Y10T428/31855; Y10T442/00; Y10T442/20; Y10T442/2279; Y10T442/2861
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
A process for the production of a nonwoven material of improved dry-cleaning resistance, in which a nonwoven material is treated with an aqueous dispersion of a copolymer consisting of copolymerised units of A. 1.0 to 2.5% by weight of N-methylolacrylamide, N-methylolmethacrylamide, or a mixture thereof; B. 1.0 to 5% by weight of acrylamide, methacrylamide, or a mixture thereof; C. 0.5 to 3% by weight of at least one α ,β-monoolefinically unsaturated dicarboxylic or tricarboxylic acid having 4 to 6 carbon atoms; and D. 89.5 to 97.5% by weight of at least one acrylic or methacrylic acid ester having 1 to 18 carbon atoms in the alcohol component, up to 50% by weight of component (D) being replaceable by at least one α ,β-monoolefinically unsaturated monomer other than those mentioned in (A) to (C).
Claim 2
Dependent Claim
133 words
A process for the production of a nonwoven material of improved dry-cleaning resistance, in which a nonwoven material is treated with an aqueous dispersion of a copolymer consisting of copolymerised units of A. 1.0 to 2.5% by weight of N-methylolacrylamide, N-methylolmethacrylamide, or a mixture thereof; B. 1.0 to 5% by weight of acrylamide, methacrylamide, or a mixture thereof; C. 0.5 to 3% by weight of at least one α ,β-monoolefinically unsaturated dicarboxylic or tricarboxylic acid having 4 to 6 carbon atoms; and D. 89.5 to 97.5% by weight of at least one acrylic or methacrylic acid ester having 1 to 18 carbon atoms in the alcohol component, up to 50% by weight of component (D) being replaceable by at least one α ,β-monoolefinically unsaturated monomer other than those mentioned in (A) to (C).
Claim 3
Dependent Claim
23 words
The process as claimed in claim 1, wherein component (C) consists of maleic acid, fumaric acid, itaconic acid, citraconic acid or aconitic acid.
Claim 4
Dependent Claim
25 words
The process as claimed in claim 1, wherein component (A) consists of N-methylolacrylamide, component (B) consists of acrylamide and component (C) consists of itaconic 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) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |