Sizing agents for paper

The most commonly used sizing agent for paper has been rosin size. Rosin size requires alum and an acidic environment in the papermaking process. This results in acidity in the paper itself. 

Homo Size 7A. [Toho Qiem. Industry] Cationic complex neutral sizing agent for paper. 

ASA. [Ethyl] Alkenyl succinic anhydride intermediate for defoamers, demulsifiers, emulsifiers, foam boosters, wetting t ents, detergents, dispersants sizing agent for paper. 

Nenphor . [Hocules] Dispersed rosin size sizing agent for paper/pqrerboard mfg. 

Chem. Descrip. Hydroxyethylated corn starch CAS 9005-25-8 EINECS/ELINCS 232-679-6 Uses Film-former, sizing agent for paper and textiles surface sizing agent applied at size press and calendar starch binder in coating applies. warp sizing agent for textiles... 

Uses Surf, sizing agent for paper sticking and coating applies. food pkg. adhesives component of per/paperbirard in contact with aq./fatty/dry foods... 

Uses Sizing agent for paper sticking and coating applies. 

Alkenyl Succinic Anhydride (ASA), as a synthetic sizing agent for paper, was first synthesized in 1974. It is composed of an unsaturated alkenic hydrocarbon backbone coupled to succinic anhydride. It is usually manufactured in two stages First an unsaturated linear or branched olefin, e. g. a 1-aIkene, is isomerized by moving its double bond randomly from its a-position. This will yield an ASA product that is liquid at room temperature, a condition important for easy emulsification of the size on application in the paper miU. In the second step, the mixture of isomerized alkenes is reacted with maleic anhydride to produce the ASA raw material. Normally ASA is a yellowish oily product. This 100% active substance can be stored as such for a long time but must be well protected from water or humidity. 

Table A.3 shows long-chain a-olefin-MA copolymers are potentially useful for preparing oil additives, wax extenders for paper, sizing agents for paper and textiles, cosmetics dispersants, and many other applications. Gulf s product literature on PA-18 points out that modification of the anhydride residue with aqueous bases, ammonia, amines, alcohols, and epoxides may provide a host of potentially useful products.

Sizing agent for paper United States 3,243,398 1966 Monsanto... 

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