Binders styrene content

The styrene content in the binder reduces resistance to yellowing and weathering... 

Styrene-acrylate copolymers are widely used as binders for interior-use paints, plasters, and exterior-use paints with a relatively high PVC. Water absorption and elasticity decrease with increasing styrene content. 

ISO 2558 1974 Textile glass chopped-strand mats for reinforcement of plastics -Determination of time of dissolution of the binder in styrene ISO 3344 1997 Reinforcement products - Determination of moisture content... 

The radiation-stable expls lack the high oxygen content found in proplnt additives and therefore give rise to low specific impulses when used in proplnt compns. If this cannot be tolerated, the use of K nitrate as an oxidizer with a poly styrene-butadiene binder should result in a very radiation-stable proplnt because of its high radiation stability, as shown by the tests on BlkPdr(Ref 167)... 

The shrinkage of polyester resin concrete decreases with increasing content of styrene contained in its binder. 

The efficacy of polyurethane and styrene butadiene rubber (SBR) as binders for ground rubber prepared from waste tires was compared to a formulation of a compound developed without binder. Without binder, the effect of both sulfur and accelerator content on tensile properties are studied, as well as the effect of ageing on these properties [29]. The suggested uses of the unbound product include rubber blocks, and ballast mats for railway applications. 

Electrical forces may also act on dust particles before they come into contact with the surface (see Section 16) i.e., it is possible in principle to make coatings that are dust repellent, principally with reference to atmospheric dust. An example may be found in alkyd-styrene structural paints with a low binder content [221]. A similar result can be achieved by treatment of various particles with a 1% aqueous solution of the cationic substance Arquad 18, which, according to data furnished by Armour (USA), prevents dust accumulation on the articles for a period of several months. In this particular case, the dust-retention tendency is reduced by removal of the electric charges from plastic articles by a process that is analogous to the action of antistatic agents [222]. Also available are dust-collecting paints and enamels, which create their own electric field. 

Details are given of the use of DSC to evaluate the binder content in latex paints. The phenomena of thermal decomposition were studied for the main components of latex paints. Data are given for binders such as vinyl acetate copolymers, styrene-acrylic resin copolymers, and rheological modifiers such as cellulose ethers. 5 refs. 

This paper reports on the synthesis, characterisation, and applications of novel flame retardant dibromostyrene-based latexes. They are copolymers of dibromostyrene with butadiene, alkyl acrylates and methacrylates, vinyl acetate, styrene and unsaturated carboxylic acids, which form a wide variety of flame retardant latexes via an emulsion polymerisation technique. Choice of monomer or monomer blend is based upon the final glass transition temperature of the copolymer desired. Other criteria include desired physical properties and chemical resistance. Dibromostyrene-based butadiene and acryUc latexes are shown to possess the desired physical properties for use in coatings, adhesives and sealants, and the bromine content of the latexes has enabled the material to pass six different flammability requirements for the end uses such as textile backcoating, latex-based paint, contact adhesive, latex sealant, nonwoven binder, and carpet backing. 18 refs. 

Other common binders include nitrocellulose (of lower than 12.6% nitrogen content, with acetone as the solvent), polyvinyl alcohol (used with water), and Laminae (an nnsaturated polyester crosslinked with styrene—the material is a liquid until cured by catalyst, heat, or both, and no solvent is required). Epoxy binders can also be used in liquid form during the mixing process, and then allowed to enre to leave a final, rigid product the caution here is the fact that many epoxy enring agents are amine compounds, which are basic. Be sure the epoxy system is compatible with all other components in the composition. 

The electrical forces may also act on dust particles before these come into contact with the surface (see 12), i.e., in principle, there may be such a thing as a dust-repellant coating, chiefly in relation to the dust particles floating in the air. Alkyd-styrene construction paints with a low binder content are an example of this [255]. A similar result may be achieved by treating the object with a 1% aqueous solution of a cation-active substance, such as Arkvad 18 which, according to the American firm of Armour [256], prevents dust accumulating on objects for several months. 

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