Rubber base adhesives features

The chemical nature and molecular weight of the rubber will greatly determine the properties of elastomeric adhesives. However, some common characteristics can be found in most of the rubber base adhesives. The elastomeric adhesives show the following specific features in assembly operations. 

Chem. Desarip. Modified dehydrogenated (disproportionated) rosin CAS 8050-09-7 EINECS/ELINCS 232-475-7 Uses Thermoplastic resin in hot-melt-applied adhesives and coating tor paper and paperboard substrates as tackifier and processing aid tor rubber-based adhesives and molding compds. emulsifier tor emulsion polymerization plasticizer, softener, tackifier tor use in contact with food Features Pale, oxidation-resistant si. retards cure Pro rties USDA Rosin N solid, flakes sol. in alcohols, esters, ketones, min. spirits, and aromatic hydrocarbons dens. 1.058 kg/l R B soften, pt. 73 C flash pt. (COC) 209 C acid no. 154 sapon. no. 159... 

Chem. Descrip. Glyceryl rosinate CAS 8050-31-5 EINECS/ELINCS 232-482-5 Uses Resin for lacquers, varnishes, adhesives wax modifier tackifier in pressure-sensitive rubber-based adhesives, in solv. and emulsbn types, in EA/A resin wax hot-melt adhesives and coatings modifier (contributes hardness, rapid drying, and resistance to water and alkali) in varnishes improves clarity as a wax modifier Features Pale thermoplastic... 

There now follows a more detailed consideration of the main features of ingredients for rubber-based adhesives. 

Acrylic adhesives tend to be more stable than rubber-based adhesives since they have a saturated backbone. They are also generally designed so that they function as PSAs without the need for any tackification or plasticization, although tackifiers can be added to modify adhesion or reduce cost. Both of these features help to differentiate them from rubber-based PSAs. The ability to avoid use of tackifiers and antioxidants makes acrylics a good choice for medical applications where minimal skin irritation is desired. 

Uses Thermopiastic resin in hot-meit-appiied adhesives and coatings for paper and paperboard substrates as tackifler and processing aid for rubber-based adhesives and moiding compds. emuisifier for emuision poiymerization piasti-cizer, softener, tackifler for use in contact with food Features Paie, oxidation-resistant si. retards cure... 

Uses Tackifier resin for water-based adhesives and sealants based on acrylic, S/B, nat. rubber, neoprene, and PVAc, esp. for pressure-sensitive adhesives, and for coatings Features Solv.-free... 

Uses Lubricant for oil-based metalworking fluids EP agent in metalworking fluids plasticizer for resins flame retardant for resins, air filters, plasticized PVC, rubber incl. neoprene, PU, textiles, paints, adhesives Features Stable med. vise, superior sol. 

Since it is not possible to commercially produce a polymer that is based on the cis 1,4 form, commercial polymers are based on the Irons 1,4 form which has a crystalline melting point, Tm, of +75 °C and a Tg of -45 °C. Pure 1,4 trans polychloroprene thus crystallises readily and would normally be considered to be of limited use for a rubber. Such a polymer, however, does not crystallise when dissolved in a solvent, but will do so when the solvent evaporates. This feature is used to good effect in the production of contact adhesives. 

Chem. Descrip. Micronized HDPE homopoiymer CAS 9002-88-4 EiNECS/ELiNCS 200-815-3 Uses Additive wax for adhesives, inks, personai care, and rubber appiics. good performance in solv.-based coatings food pkg. adhesives, coatings, paper/paperboard, cellophane, rubber articles, textiles, lubricants Features Exc. mar and abrasion resist. exc. recoatability Regulatory FDA 21CFR 175.105,175.300,175.320,176.170,176.180,... 

Uses Flame retardant, plasticizer for PVC and other polymers, rubber, aq. systems, latexes based on PVC, SBR, PVAc, acrylics, EVA, paints, dyes, nonwoven fabric binders, textile back coatings, carpet backings, asbestos paper bindings, adhesives, pigment carriers Features Emulsifiable... 

Properties Nonionic Toxicology TSCA listed Uses Defoamer mold release applies. intermediate for esters useful as lubricants, defoamers in rubber, pharmaceuticals components for urethane resins boiler water additive for food contact defoamer for beet sugar and yeast processing emollient, soivent in cosmetics, pharmaceuticals lubricant base for textiles, paper, metalworking food-pkg. adhesives in paper/paperboard in contact with aq./fatty foods plasticizer in food-contact polymers defoamer in food-contact coatings and paper/paperboard Features Provides low odor, low irritation, low toxicity to personal care prods. 

Thus, in brief, a successful pressure-sensitive adhesive not only has low resistance to small strain deformation in order to facilitate wetting, but also it can resist large strains without flowing apart easily. Certain neat elastomers such as acrylate-based PSAs possess these features and are intrinsically tacky without additives. Other PSAs are formulated by diluting high molecular weight rubbers with special resins called tackifiers. 

Uses Emulsion polymerization surfactant imparts good stability and uniform particle size to emulsion polymers based on vinyl chloride, vinyiidene chloride, styrene, butadiene, and acrylic esters surfactant for fruit coatings, polymeric coatings, adhesives, paperboard, rubber goods food-pkg. adhesives, coatings, paper, cellophane, rubber articles, textiles, animal glue defoamer in food-contact paper/paperboard Features Low cloud pt. 

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