Softener polyols

For the above polyol blend viscosity (Brookfield, ASTM D-2196) = 1500 mPa-S at 23° C. For the reaction mixture working (pot) life 20 min Gardner circular dry times [72°F, 54% relative humidity (RH)] surface dry = 1.0 h, hard dry = 2.0 h, mar free = 3.5 h. For the finished coating gloss (ASTM D-523) = 90+ at 60° impact (ASTM D-2794) = 60 in.-lb direct, 10 in.-lb reverse Tabor abrasion (ASTMD-4060,1000 g load, 1000cycles, CS-17 wheel) = 95.6 mg pendulum hardness = 180 s MEK double rubs (ASTM D4752-95, 50 double rubs) = softened. 

Glycidyl Ethers of Aliphatic Polyols. Glycidyl ether epoxy resins based on polyols provide greater flexibility and lower softening temperatures for the final cured epoxy system. The polyol is reacted with epichlorohydrin to produce these resins. These resins are generally not used alone because of water sensitivity and overall lack of toughness. However, they serve as modifiers for DGEBA-based epoxy resins. An idealized structure for a flexible resin based on this chemistry is shown in Fig. 2.9. 

Use Alkyd resins, dynamite, ester gums, pharmaceuticals, perfumery, plasticizer for regenerated cellulose, cosmetics, foodstuffs, conditioning tobacco, liquors, solvent, printer s ink rolls, polyurethane polyols, emulsifying agent, rubber stamp and copying inks, binder for cements and mixes, special soaps, lubricant and softener, bacteriostat, penetrant, hydraulic fluid, humectant, fermentation nutrients, antifreeze mixtures. 

Synonyms Pentaerythritol ester of rosin Pentaerythritol rosinate Resin acids and rosin acids, esters with pentaerythritol Rosin, gum or wood, pentaerythritol ester Rosin pentaerythritol ester Tall oil rosin, pentaerythritol ester Classification Thermoplastic resin Definition Ester of rosin acids with the polyol, pentaerythritol Properties Amber hard solid sol. in acetone, benzene insol. in water soften, pt. (R B) 110-115 C... 

There are many new and less well-known types of softening compounds such as pentaerythri-tol ditallowate [6], glycerine-based polyol esterquats [7], l,l-ethylene-( M(2-tallow-alkyl-3-methyl-imidazolinium) methyl sulfate [8], P-hydroxyethyl ethylenediamine derivatives [8], polyammonium... 

As described in the previous section polyol-isocyanate prepolymers are commonly chain extended by glycols or amines. These enable sequences of urethane and/or urea groups in close proximity to be produced in a chain. Such a sequence forms a stiff or hard chain segment with softening properties that may reasonably be predicted from Fig. 16.1 and other factors relating structure and properties discussed in Chapter 4. 

Whilst it is possible to react polyol, isocyanate and glycol simultaneously the division of the chain into hard and soft segments will be less clear cut. The prepolymer route, which gives polymers of higher softening point and lower compression set, is therefore generally preferred. 

Uses Skin softener, nonoily emollient for cosmetic creams/lotions, bath oils, blushers, skin fresheners, aftershaves, nail enamel removers binder lubricant dispersant emulsifier food-pkg. adhesives, coatings, paper, polymers defoamer for aq. systems, food contact, mold release applies., paints, ceramics, grinding fluids, hydraulic fluids lubricant base for textiles, paper, metalworking formulations chemical intermediate for fatty acid esters component for urethanes Regulatory FDA 21CFR 173.310,173.340(a)(3), 175.105,175.300,175.380, 175.390,176.170(a)(5), 176.180,176.200,176.210,177.1680,178.3740 Properties APHA40 max. liq., polyol odor sol. 5% in min. oils, min. spirits, aromatic soivs., perchloroethylene insol. in water m.w. 2000 sp.gr. 1.002 vise. 150-175 cst (100 F) vapor pressure < 0.1 mm Hg b.p. > 300 F acid no. 1 max. pour pt. -31 C flash pt. (PMCC) > 350 F ref index 1.450 100% act. 

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