Plasticizers low volatility

C9H19OOC(CH2)4COOC9H19], A low-volatility plasticizer based on isononyl alcohol. Combustible. 

Use General-purpose, low-volatility plasticizer for vinyl resins pure grade as stationary liquid phase in chromatography. 

The most common system for the outer or secondary sealant used is based on polysulfide polymers cured with manganese dioxide where the physical properties have been modified by the use of a low-volatility plasticizer such as a higher phthalate. Recent developments have seen an increase in the use of polyurethanes because of their higher adhesion potential. All the systems are required to have oil resistance when used in timber windows (from the glazing putt and preservatives) (see Selection of joint sealant). 

In PVC films containing plasticizers, embrittlement caused by plasticizer depletion due to volatility and extraction by water is observed in addition to discoloration. The visual result is referred to as orange or elephant skin. The use of appropriate, low volatility plasticizer grades can cause an improvement. A considerable amount of plasticizer depletion, however, is caused by the chemical saponification process and the subsequent washing out of the water-soluble hydrolysis products - alcohol and acid - formed during this process [202]. 

Low-volatility plasticizers include those plasticizers that offer greater permanence and longer service lives. This category includes the higher molecular... 

Because of the lower volatility of DIDP and DPHP relative to other GP plasticizers, these two plasticizers are also sometimes considered low-volatility plasticizers. For automotive interior products the plasticizers DEHP, DINP, DEHTP, DC9CH, citrates, benzoates, as well as many of the phthalate alternatives would fail many interior emission or fogging requirements while DIDP and DPHP, along with trimellitate esters and the linear phthalates L9P and L91P, would pass. 

Uniplex 546 la an excellent low volatility plasticizer for polyvinyl chloride. It is particularly recomnended for use in PVC wire Insulation. 

CR M-type vulcanizates, especially those that contain optimized antioxidants and crosslinking systems and low volatility plasticizers, display good heat resistance. 

Low-temperature applications will require a good low-temperature plasticizer, but a blend may be necessary to balance high- and low-temperature properties. Moreover, check the solubility in any liquid media that will be encountered as extraction could be a problem and again a blend of plasticizers is often necessary. A low volatility plasticizer should be selected for improved heat aging properties. 

DEM Demertzis, P.G., Riganakos, A., and Akrida-Demertzi, K., An inverse gas chromatographic study of compatibility of food grade PVdC copolymer and low volatility plasticizers, Polym. Intemat., 25, 229, 1991. 

Phthalstes These are the most economical low-volatility plasticizers. Compatibility constraints limit attempts to reduce volatility by increased phthalate molecular weight, with the practical upper limit being the C13 branched-chain phthalate ester DTDP. Phthalate esters prepared with C14 and higher-molecular-weight alcohols are not compatible with PVC. 

Diisodecyl Phthalate (DIDP) and Di-2-propylheptyl Phthalate (DPHP) The most commonly used low-volatility plasticizer available worldwide is DIDP. DIDP has been used as a permanent plasticizer for more than 50 years, first being produced commercially in 1954 from isodecanol produced via the 0X0 process. It has found... 

TABLE 7.7 Performance Comparisons of Low-Volatility Plasticizers in PVC at 50 phr and 70A Hardness ... 

Benzoflex P-200 polyethylene glycol (molecular weight 200) dibenzoate. Benzoflex P-200 has limited utility in PVC, as the compatibility of this low-volatility plasticizer in PVC is not great. 

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