EP0312008A2
Expired / Lapsed
EP
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Heat resistant acrylic binders for nonwovens
Assignee: Celanese International Corp
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Filing: 1988-10-12
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Granted: —
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Expires: 2008-10-12
Abstract
Abstract Heat resistant binders for flexible nonwoven products may be prepared using an emulsion polymer comprising 100 parts by weight of C₁-C₄ alkyl acrylate or methacrylate ester monomers, 0.5 to 5 parts of a hydroxyalkyl acrylate or methacrylate, 3 to 6 parts of a water soluble N-methylol containing comonomer and 0.1 to 5 parts of a multifunctional comonomer. The binders are useful in the formation of heat resistant flexible products for use in roofing, flooring and filtering materials.
Inventors
- 👤 Ronald Pangrazi
- 👤 James L. Walker
- 👤 Paul R. Mudge
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 15:29
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D04H1/587; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/31504; Y10T428/31815; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2721; Y10T442/2861
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
90 words
A process for preparing a heat resistant nonwoven product comprising the steps of: a) impregnating a nonwoven web with an emulsion polymer having a glass transition temperature (Tg) of +10 to +50°C, said polymer comprising 100 parts by weight of C₁-C₄ alkyl acrylate or methacrylate ester monomers of mixtures thereof, 0.5 to 5 parts of a hydroxyalkyl acrylate or methacrylate, 3 to 6 parts of a water soluble N-Methylol containing comonomer; and 0.1 to 3 parts of a multifunctional comonomer; b) removing excess binder; c) drying and curing the mat.
Claim 2
Dependent Claim
90 words
A process for preparing a heat resistant nonwoven product comprising the steps of: a) impregnating a nonwoven web with an emulsion polymer having a glass transition temperature (Tg) of +10 to +50°C, said polymer comprising 100 parts by weight of C₁-C₄ alkyl acrylate or methacrylate ester monomers of mixtures thereof, 0.5 to 5 parts of a hydroxyalkyl acrylate or methacrylate, 3 to 6 parts of a water soluble N-Methylol containing comonomer; and 0.1 to 3 parts of a multifunctional comonomer; b) removing excess binder; c) drying and curing the mat.
Claim 3
Dependent Claim
20 words
The process of Claim 1 wherein the web is cured by heating at a temperature of at least about 150°C.
Claim 4
Dependent Claim
12 words
The process of Claim 1 wherein the web is cured by catalysis.
Claim 5
Dependent Claim
21 words
The process of Claim 1 wherein the emulsion polymer contains as a major constituent monomers of ethyl acrylate and methyl methacrylate.
Claim 6
Dependent Claim
41 words
The process of Claim 1 wherein the hydroxyalkyl acrylate comonomer in the emulsion polymer is selected from the group consisting of hydroxyethyl, hydroxypropyl and hydroxybutyl acrylate or methacrylate and is present in an amount of 1 to 3 parts by weight.
Claim 7
Dependent Claim
33 words
The process of Claim 1 wherein the N-methylol containing comonomers in the emulsion polymer is N-methylol acrylamide or N-methylol methacrylamide and is present in an amount of 4 to 6 parts by weight.
Claim 8
Dependent Claim
49 words
The process of Claim 1 wherein the multifunctional comonomer in the emulsion polymer is selected from the group consisting of vinyl crotonate, allyl acrylate, allyl methacrylate, diallyl maleate, divinyl adipate, diallyl adipate, divinyl benzene, diallyl phthalate, ethylene glycol diacrylate, ethylene glycol dimethacrylate, butanediol dimethacrylate, methylene bis-acrylamide, triallyl cyanurate, trimethylolpropanetriacrylate.
Claim 9
Dependent Claim
12 words
The process of Claim 7 wherein the multifunctional comonomer is triallyl cyanurate.
Claim 10
Dependent Claim
33 words
The process of Claim 1 wherein there is additionally present in the emulsion polymer up to 4 parts by weight of an alkenoic or alkenedioic acid having from 3 to 6 carbon atoms.
Claim 11
Dependent Claim
23 words
The process of Claim 1 wherein the nonwoven web is selected from the group consisting of polyester, felt, rayon or cellulose wood pulp.
Claim 12
Dependent Claim
76 words
A roofing membrane comprising a polyester mat impregnated with an emulsion polymer having a glass transition temperature (Tg) of +10 to +50°C, the polymer comprising 100 parts by weight of C₁-C₄ alkyl acrylate or methacrylate monomers or mixtures thereof, 0.5 to 5 parts of a hydroxyalkyl acrylate or methacrylate, 3 to 6 parts of a water soluble N-methylol containing comonomer and 0.1 to 5 parts of multifunctional comonomer; the impregnated mat being subsequently coated with asphalt.
Claim 13
Dependent Claim
76 words
A roofing membrane comprising a polyester mat impregnated with an emulsion polymer having a glass transition temperature (Tg) of +10 to +50°C, the polymer comprising 100 parts by weight of C₁-C₄ alkyl acrylate or methacrylate monomers or mixtures thereof, 0.5 to 5 parts of a hydroxyalkyl acrylate or methacrylate, 3 to 6 parts of a water soluble N-methylol containing comonomer and 0.1 to 5 parts of multifunctional comonomer; the impregnated mat being subsequently coated with asphalt.
Claim 14
Dependent Claim
12 words
The roofing membrane of Claim 18 wherein the multifunctional monomer is triallylcyanurate.
Claim 15
Dependent Claim
66 words
A latex binder composition comprising an emulsion polymer having a glass transition temperature (Tg) of +10 to +50°C, said polymer comprising 100 parts by weight of C₁-C₄ alkyl acrylate or methacrylate ester monomers or mixtures thereof, 0.5 to 5 parts of a hydroxyalkyl acrylate or methacrylate, 3 to 6 parts of a water soluble N-methylol containing comonomer and 0.1 to 5 parts of a multifunctional comonomer.
Claim 16
Dependent Claim
66 words
A latex binder composition comprising an emulsion polymer having a glass transition temperature (Tg) of +10 to +50°C, said polymer comprising 100 parts by weight of C₁-C₄ alkyl acrylate or methacrylate ester monomers or mixtures thereof, 0.5 to 5 parts of a hydroxyalkyl acrylate or methacrylate, 3 to 6 parts of a water soluble N-methylol containing comonomer and 0.1 to 5 parts of a multifunctional comonomer.
References Cited (Backward Citations)
US4539254A
Cited
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