Carboxylated butadiene-styrene

Acrylics. Acetone is converted via the intermediate acetone cyanohydrin to the monomer methyl methacrylate (MMA) [80-62-6]. The MMA is polymerized to poly(methyl methacrylate) (PMMA) to make the familiar clear acryUc sheet. PMMA is also used in mol ding and extmsion powders. Hydrolysis of acetone cyanohydrin gives methacrylic acid (MAA), a monomer which goes direcdy into acryUc latexes, carboxylated styrene—butadiene polymers, or ethylene—MAA ionomers. As part of the methacrylic stmcture, acetone is found in the following major end use products acryUc sheet mol ding resins, impact modifiers and processing aids, acryUc film, ABS and polyester resin modifiers, surface coatings, acryUc lacquers, emulsion polymers, petroleum chemicals, and various copolymers (see METHACRYLIC ACID AND DERIVATIVES METHACRYLIC POLYMERS). 

One method (116) of producing cellular polymers from a variety of latexes uses primarily latexes of carboxylated styrene—butadiene copolymers, although other elastomers such as acryUc elastomers, nitrile mbber, and vinyl polymers can be employed. 

Polymers can be modified by the introduction of ionic groups [I]. The ionic polymers, also called ionomers, offer great potential in a variety of applications. Ionic rubbers are mostly prepared by metal ion neutralization of acid functionalized rubbers, such as carboxylated styrene-butadiene rubber, carboxylated polybutadiene rubber, and carboxylated nitrile rubber 12-5]. Ionic rubbers under ambient conditions show moderate to high tensile and tear strength and high elongation. The ionic crosslinks are thermolabile and, thus, the materials can be processed just as thermoplastics are processed [6]. 

In a three-necked flask equipped with stirrer, reflux condenser, and N2 inlet, 200 grams of a 1% solution of carboxylated styrene-butadiene block copolymer in o-dichlorobenzene and 2 grams TiOo were stirred at various temperatures for 3 hours. (Typical temperatures in this treatment were 110°, 150°, and 178°C.) After the heat treatment the Ti02 was isolated from the block copolymer solution by centrifuging for 1-2 hours at 2,000-2,200 rpm. After decanting the supernatant solution, the solid particles were washed with solvent and dried in vacuo for about 16 hours at 50°C. 

Following the guidelines established by Schechter s work, we dispersed titanium dioxide particles in 1% solutions of carboxylated styrene-butadiene block copolymers and stirred the dispersions at elevated temperatures in a nitrogen atmosphere. Typical data are shown in Table I. The dispersions (primary dispersions) in o-dichlorobenzene were quite stable. The titanium dioxide particles were isolated from these primary dispersions by centrifugation and were washed with toluene and finally with methanol. After drying in vacuo, samples of the block copolymer-titanium dioxide composites were submitted for carbon analysis. The... 

This work has demonstrated that carboxylated styrene-butadiene block copolymers are excellent dispersants for titanium dioxide particles in toluene. Combining our results with carboxylated block copolymers and homopolymers and Schechters (18) results with fatty acids, we can... 

The effects of improved wettability, entropic repulsion, and sterical hindrance undoubtedly play a role in stabilizing dispersed solid particles by block or graft copolymers. However, since the dispersions of titanium dioxide in toluene stabilized by carboxylated styrene-butadiene block copolymers are so much more stable than dispersions stabilized by carboxylated homopolymers under otherwise identical conditions, we must assume that an additional factor comes into play when block copolymers are used. The model in Figure 1 is an attempt to explain this additional... 

HSBR HTNR HXSBR ICTA Hydrogenated styrene butadiene rubber Hydroxyterminated liquid NR Hydrogenated carboxylated styrene butadiene rubber International Confederation for Thermal Analysis... 

Since compounds of the type XVII have shown comparable activity in a number of systems including cis-polybutadiene, styrene-butadiene rubber, and ethylene-propylene rubber, they have some commercial promise, and development work on these compounds is continuing. Nevertheless, they are not completely nondiscoloring, and in certain applications, particularly carboxylated styrene-butadiene latex films, yellow discoloration caused by the antioxidant is a serious drawback. We therefore turned our attention to ortho-linked compounds derived from 2,4-dialkylphenols. 

Chemical nature anionic carboxylated styrene butadiene latex... 

A latex adhesive is necessary to bond the tufts into the primary backing, adhere the individual fiber strands in the yarn tufts together so they don t separate and "piU at the carpet surface, and attach the secondary backing to this primary structure. This is accomplished almost exclusively by carboxylated styrene-butadiene latex containing 400 or more parts per hundred parts of rubber of a mineral filler. In addition to economics, this filler hel s provide density and stiffness to the carpet structure for the desired hand." Feld ar used to he the filler of choice, but less expensive calcium carbonate has replaced it in most instances. 

Low absorptive capacity primary foam dressings have been produced from a carboxylated styrene butadiene rubber latex foam. The foam is bonded to a non-woven fabric coated with a polyethylene film which has been vacuum ruptured. The basic foam is naturally... 

It has been proved that incorporation of carboxylic acid groups in the polymeric chain has a significant effect on colloidal properties of latex, processability, and end-use property. Carboxylated styrene-butadiene latexes (XSBR) are prepared via batch emulsion copolymerization with different amounts of acrylic acid in the absence of emulsifier. They are among the most important polymeric colloids, and can be used as binder in paper coatings, carpet backing, paints, and nonwoven. There are several studies on the preparation and properties of XSBR latexes. 

Finaprene . [FinaChem.] Polybutadiene, styrene-butadiene, styrene iso-prene, or carboxylated styrene butadiene elastomers for footwear, tech, goods, tires, adhesives, bitumen modification, plastic modification. 

Carboxylic Styrene-Butadiene (SB) Latex. The carboxylic latex was prepared by emulsion polymerization at 60°C using (in parts) butadiene (40), styrene (57.5), and acrylic acid (2.5) in the presence of demineralized water (138), 14C-sulfonate (0.5) as emulsifier, and tertiary dodecyl mercaptan (0.5) and ammonium persulfate (0.5) as initiator. 

The dehydration of soy protein reinforced carboxylated styrene-butadiene composite causes a significant increase of the shear modulus. The effect comes from the increase in rigidity of the filler network and the increase of filler-rubber... 

Economical soy products including SPI, DSF, SPC, and SSF can be mixed and coagulated with polymer latex in the aqueous phase to form dry composites with significantly enhanced modulus. These dry soy products have a shear elastic modulus of 1-5 GPa within the temperature range of -40 to 140 C. The carboxylated styrene-butadiene composites filled with these soy products show a significant increase of shear modulus compared to that of the polymer matrix alone. The different compositions of these soy products generate a different reinforcement effect and approximately follow the order SPC > DSF > SSF SPI. The dehydration of these soy reinforcement fractions causes the... 

Stabilization of Carboxylated Styrene Butadiene (X-SBR) Latices Carboxylated SBR latices are used as adhesives in applications where durability and flexibility are desired. Some of the major uses for X-SBR latex are in tufted carpet backing, paper coatings, wall and vinyl floor tile adhesives, and pressure-sensitive adhesives. Typically, discoloration is the first measure of the degradation of an X-SBR latex. Discoloration of a dried latex film can often be related to a loss of the physical properties and subsequently, to inferior performance in an adhesive formulation. Figure 9 illustrates the effects of adding an effective antioxidant system to an X-SBR latex on the level of discoloration as a result of static oven aging at 150°C (300°F). The addition of AO-4 alone... 

This chapter concludes with brief reference to carboxylated rubber latexes. Further information, with references, is available in a review by Blackley [27]. Carboxylated rubber latexes contain rubbery polymers which have been modified by inclusion of a small amount of a copolymerisable carboxylic-acid monomer in the emulsion polymerization system by which they were prepared. Typical carboxylic-acid monomers are acrylic acid (XI), methacrylic acid (XII) and itaconic acid (XIII). The most industrially-important rubber latexes of this type are the carboxylated styrene-butadiene rubber latexes. Also of considerable... 

Stephen, R., Ranganathaiah, C., Varghese, S., Joseph, K., and Thomas, S., Gas transport through nano and micro composites of natural rubber (NR) and their blends with carboxylated styrene butadiene rubber (XSBR) latex membranes. Polymer, XI, 858-870 (2006). 

Chem. Descrip. Carboxylated styrene-butadiene copolymer latex Uses Associative thickener for adhesives, suitable for coated and uncoated paper. Mylar, cellulose acetate, metalized polyester, aluminum, nonskid coating, and mastic substrates Features Very efficient... 

Synonyms Carboxylated styrene-butadiene copolymer Uses Nonwoven binder for textiles In Interior vapor barrier primer sealers and flat wall paint binder for paper coatings food-pkg. adhesives/ paper... 

Carboxylated styrene-butadiene copolymer. See Carboxylated styrene butadiene... 

Carboxylated styrene butadiene Polyvinyl 2201 Eastman Chlorinated Pr olefin... 

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