US4351875A
Expired / Lapsed
US
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Heteropolymer acrylic latices and textiles treated therewith
Assignee: Rohm and Haas Co
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Filing: 1981-10-21
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Granted: 1982-09-28
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Expires: 2001-10-21
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° C. or lower and the monomer composition forming the shell is selected to provide a Tg in the shell of about 60° C. to about -10° 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
2026-10-28 20:35
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B32B7/00; B32B7/04; B32B7/12; C; C08; C08F; C08F265/00; C08F265/04; C08F265/06; C08F291/00; D; D06; D06M; D06M15/00; D06M15/693; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2369
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
183 words
An article of manufacture comprising a sheet of release material having a dried film of the composition of an acrylic latex, the particles of which comprise about 30-60% by weight of a polymeric core and about 70-40% by weight of a polymeric shell; wherein said core is formed by emulsion copolymerization 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 comprising essentially of: 40-70% 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-methylol acrylamide, N-methylol methacrylamide, or a mixture of acrylamide and N-methylolacrylamide, or a mixture of methacrylamide and N-methylol methacrylamide, and 0-2% by weight of itaconic acid.
Claim 2
Dependent Claim
183 words
An article of manufacture comprising a sheet of release material having a dried film of the composition of an acrylic latex, the particles of which comprise about 30-60% by weight of a polymeric core and about 70-40% by weight of a polymeric shell; wherein said core is formed by emulsion copolymerization 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 comprising essentially of: 40-70% 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-methylol acrylamide, N-methylol methacrylamide, or a mixture of acrylamide and N-methylolacrylamide, or a mixture of methacrylamide and N-methylol methacrylamide, and 0-2% by weight of itaconic acid.
Claim 3
Dependent Claim
227 words
An article of manufacture comprising a textile material treated with a polymeric composition formed from acrylic latex particles, said latex particles comprising about 30-60% by weight of a 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: 7- 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, 0-03% 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: 40-70% 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-methylol acrylamide, N-methylol methacrylamide, or a mixture of acrylamide and N-methylol acrylamide, or a mixture of methacrylamide and N-methylol methacrylamide, and 0-2% by weight of itaconic acid; the monomers of said first monomer composition being selected to provide a Tg in said core of -20° C. or lower, and the monomers of said second monomer composition being selected to provide a Tg in said shell of about 60° C. to about -10° C.
Claim 4
Dependent Claim
227 words
An article of manufacture comprising a textile material treated with a polymeric composition formed from acrylic latex particles, said latex particles comprising about 30-60% by weight of a 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: 7- 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, 0-03% 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: 40-70% 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-methylol acrylamide, N-methylol methacrylamide, or a mixture of acrylamide and N-methylol acrylamide, or a mixture of methacrylamide and N-methylol methacrylamide, and 0-2% by weight of itaconic acid; the monomers of said first monomer composition being selected to provide a Tg in said core of -20° C. or lower, and the monomers of said second monomer composition being selected to provide a Tg in said shell of about 60° C. to about -10° C.
Claim 5
Dependent Claim
84 words
The article 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 6
Dependent Claim
85 words
The article of claim 2 wherein the first monomer composition consists 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 the second monomer composition consists 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) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |