Method of making functionalized styrene butadiene type latex binders
AssigneeGenCorp Inc.
InventorsSatish C. Sharma, Amiya K. Chatterjee, Ronald D. Mohan, Friedhold Schon
Life of this patent
Estimating the term…
Abstract
A latex useful as a binder for paper, nonwovens, and textiles is prepared by copolymerizing in aqueous emulsion using a redox initiator at 5.degree. C. a mixture of 35 to 60% weight of a conjugated diene monomer and from about 30 to 65% by weight of a vinyl aryl monomer. Additional improvements can be obtained by incorporating in the mixture a small percentage by weight of copolymerizable monomers such as acrylic acid, methacrylic acid, itaconic acid and/or a functional type monomer having an activatable methyl, ethyl, propyl or butyl ester group and a vinyl group.
Claims8
The method of making copolymers useful as binders for paper, nonwoven and textile substrates comprising;
- copolymerizing in aqueous emulsion using a redox initiator at 5.degree. C. a:
- a. mixture of 35 to 60% by weight of at least one conjugated diene monomer having from 4 to 8 carbon atoms and from about 30 to 65% by weight of at least one vinyl aromatic monomer having from 8 to 12 carbon atoms, or
- b. mixture according to a. containing additionally from about 1 to 3% by weight of at least one copolymerizable monomer selected from the group consisting of acrylic acid and methacrylic acid, or
- c. mixture according to a. containing additionally from about 0.5 to 3.5% by weight of itaconic acid, or
- d. mixture according to a. containing additionally from about 1 to 15% by weight of at least one functional monomer having an activatable methyl, ethyl, propyl or butyl ester group and a vinyl group, or
- e. mixture according to a. containing additionally from about 1 to 15% by weight of at least one functional monomer having an activatable methyl, ethyl, propyl or butyl ester group and a vinyl group and from about 0.5 to 3.5% by weight of itaconic acid,
- forming a latex, and subsequently curing said latex to
- produce a cured latex imparting improved tensile strength to the substrate.
The method of making copolymers useful as binders for paper, nonwovens and textiles comprising;
- copolymerizing in aqueous emulsion using a redox initiator at 5.degree. C. a:
- a. mixture of 35 to 60% by weight of at least one conjugated diene monomer having from 4 to 8 carbon atoms and from about 30 to 65% by weight of at least one vinyl aromatic monomer having from 8 to 12 carbon atoms, and containing additionally
- from about 1 to 15% by weight of at least one functional monomer having an activatable methyl, ethyl, propyl or butyl ester group and a vinyl group, or
- from about 1 to 15% by weight of at least one functional monomer having an activatable methyl, ethyl, propyl or butyl ester group and a vinyl group and from about 0.5 to 3.5% by weight of itaconic acid,
- forming a latex, and subsequently curing said latex.
Dependencies are inferred from the claim text.