US4277384A
Expired / Lapsed
US
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Heteropolymer acrylic latices and textiles treated therewith
Assignee: Rohm and Haas Co
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Filing: 1978-09-25
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Granted: 1981-07-07
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Expires: 1998-09-25
Abstract
Abstract Tear resistance and flexibility of resin-treated textiles are improved while retaining good low temperature properties by using as the resin an acrylic emulsion polymer wherein the latex particles have a core-shell structure. The monomers forming the core are selected to provide a Tg in the core of -20 DEG C. or lower and the monomer composition forming the shell is selected to provide a Tg in the shell of about 60 DEG C. to about -10 DEG C. The core monomer composition contains 4-10 wt. % of a latent crosslinker together with 0-0.03 wt. % of an active crosslinker or a graftlinker, and the shell monomer composition contains 2-10 wt. % of a latent crosslinker.
Inventors
- 👤 Charles T. Arkens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:25
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/693; C; C08; C08F; C08F265/00; C08F265/04; C08F265/06; C08F291/00; Y; Y10; Y10S; Y10S525/00; Y10S525/902; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T442/00; Y10T442/20; Y10T442/2369
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
161 words
As a textile treating composition, an acrylic latex, the particles of which comprise about 30-60% by weight of polymeric core and about 70-40% by weight of a polymeric shell, wherein said core is formed by emulsion polymerization of a first monomer composition consisting essentially of: 70-95% by weight of a C 1 -C 8 alkyl acrylate, 0-15% by weight of a C 1 -C 8 alkyl methacrylate, 4-10% by weight of acrylamide or methacrylamide, 0-0.3% by weight of allyl methacrylate, and 0-2% by weight of itaconic acid; and wherein said shell is formed on said core by emulsion polymerization of a second monomer composition in the presence of said core, said second monomer composition consisting essentially of: 4- 70% by weight of a C 1 -C 8 alkyl acrylate, 20-50% by weight of a C 1 -C 8 alkyl methacrylate, 2-10% by weight of N-methylolacrylamide, N-methylol methacrylamide, or a mixture of methacrylamide and N-methylolacrylamide, and 0-2% by weight of itaconic acid.
Claim 2
Dependent Claim
161 words
As a textile treating composition, an acrylic latex, the particles of which comprise about 30-60% by weight of polymeric core and about 70-40% by weight of a polymeric shell, wherein said core is formed by emulsion polymerization of a first monomer composition consisting essentially of: 70-95% by weight of a C 1 -C 8 alkyl acrylate, 0-15% by weight of a C 1 -C 8 alkyl methacrylate, 4-10% by weight of acrylamide or methacrylamide, 0-0.3% by weight of allyl methacrylate, and 0-2% by weight of itaconic acid; and wherein said shell is formed on said core by emulsion polymerization of a second monomer composition in the presence of said core, said second monomer composition consisting essentially of: 4- 70% by weight of a C 1 -C 8 alkyl acrylate, 20-50% by weight of a C 1 -C 8 alkyl methacrylate, 2-10% by weight of N-methylolacrylamide, N-methylol methacrylamide, or a mixture of methacrylamide and N-methylolacrylamide, and 0-2% by weight of itaconic acid.
Claim 3
Dependent Claim
41 words
The composition of claim 1 wherein the C 1 -C 8 alkyl acrylate in the first and second monomer compositions is butyl acrylate, and the C 1 -C 8 alkyl methacrylate in the first and second monomer compositions is methyl methacrylate.
Claim 4
Dependent Claim
84 words
The composition of claim 2 wherein the first monomer composition consists essentially of: about 76-86% by weight of butyl acrylate, about 6-15% by weight of methyl methacrylate, about 7% by weight of methacrylamide and about 1% by weight of itaconic acid; and wherein the second monomer composition consists essentially of: 47-57% by weight of butyl acrylate, about 35-45% by weight of methyl methacrylate, about 7% by weight of a 1:1 molar mixture of N-methylolmethacrylamide and methacrylamide, and about 1% by weight of itaconic acid.
Claim 5
Dependent Claim
138 words
As a textile treating composition, an acrylic latex, the particles of which comprise about 30-60% by weight of polymeric core and about 70-40% by weight of a polymeric shell, wherein said core is formed by emulsion polymerization of a first monomer composition consisting essentially of: about 86% by weight of butyl acrylate, about 6% by weight of methyl methacrylate, about 7% by weight of methacrylamide, and about 1% by weight of itaconic acid; and wherein said shell is formed on said core by emulsion polymerization of a second monomer composition in the presence of said core, said second monomer composition consisting essentially of: about 57% by weight of butyl acrylate, about 35% by weight of methyl methacrylate, about 7% by weight of a 1:1 molar mixture of N-methylolmethacrylamide and methacrylamide, and about 1% by weight of itaconic acid.
Claim 6
Dependent Claim
138 words
As a textile treating composition, an acrylic latex, the particles of which comprise about 30-60% by weight of polymeric core and about 70-40% by weight of a polymeric shell, wherein said core is formed by emulsion polymerization of a first monomer composition consisting essentially of: about 86% by weight of butyl acrylate, about 6% by weight of methyl methacrylate, about 7% by weight of methacrylamide, and about 1% by weight of itaconic acid; and wherein said shell is formed on said core by emulsion polymerization of a second monomer composition in the presence of said core, said second monomer composition consisting essentially of: about 57% by weight of butyl acrylate, about 35% by weight of methyl methacrylate, about 7% by weight of a 1:1 molar mixture of N-methylolmethacrylamide and methacrylamide, and about 1% by weight of itaconic acid.
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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) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |