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<blockquote data-quote="W8 a minute" data-source="post: 3285102" data-attributes="member: 570378">Who says Armor All dries out plastic?&nbsp; I don&#039;t see any chemists here.Plastic cracks because the plasticizers evaporate:&quot;Plasticizers for plastics are additive, most commonly phthalates, that give hard plastics like PVC the desired flexibility and durability. They are often based on esters of polycarboxylic acids with linear or branched aliphatic alcohols of moderate chain length. Plasticizers work by embedding themselves between the chains of polymers, spacing them apart (increasing of the &quot;free volume&quot;), and thus significantly lowering the glass transition temperature for the plastic and making it softer. For plastics such as PVC, the more plasticiser added, the lower its cold flex temperature will be. This means that it will be more flexible, though its strength and hardness will decrease as a result of it. Some plasticizers evaporate and tend to concentrate in an enclosed space; the &quot;new car smell&quot; is caused mostly by plasticizers evaporating from the car interior.&quot;The ingredients of Armor All from the MSDS:SiliconeSorbitolWater<a href="http://www.setonresourcecenter.com/msds/docs/wcd00006/wcd0066c.htm" target="_blank">http://www.setonresourcecenter.com/msds/docs/wcd00006/wcd0066c.htm</a>Silicone:&quot;Silicones (more accurately called polymerized siloxanes or polysiloxanes) are mixed inorganic-organic polymers with the chemical formula [R2SiO]n, where R = organic groups such as methyl, ethyl, and phenyl. &quot;Funny, most plasticizers end in &quot;ethyl&quot;So....if you are right....adding a protective coating of plasticizers to something made of plasticizers will cause it to lose plasticizers. Doesn&#039;t make much sense to me.</blockquote>

[QUOTE="W8 a minute, post: 3285102, member: 570378"] Who says Armor All dries out plastic? I don't see any chemists here. Plastic cracks because the plasticizers evaporate: "Plasticizers for plastics are additive, most commonly phthalates, that give hard plastics like PVC the desired flexibility and durability. They are often based on esters of polycarboxylic acids with linear or branched aliphatic alcohols of moderate chain length. Plasticizers work by embedding themselves between the chains of polymers, spacing them apart (increasing of the "free volume"), and thus significantly lowering the glass transition temperature for the plastic and making it softer. For plastics such as PVC, the more plasticiser added, the lower its cold flex temperature will be. This means that it will be more flexible, though its strength and hardness will decrease as a result of it. Some plasticizers evaporate and tend to concentrate in an enclosed space; the "new car smell" is caused mostly by plasticizers evaporating from the car interior." The ingredients of Armor All from the MSDS: Silicone Sorbitol Water [URL="http://www.setonresourcecenter.com/msds/docs/wcd00006/wcd0066c.htm"]http://www.setonresourcecenter.com/msds/docs/wcd00006/wcd0066c.htm[/URL] Silicone: "Silicones (more accurately called polymerized siloxanes or polysiloxanes) are mixed inorganic-organic polymers with the chemical formula [R2SiO]n, where R = organic groups such as methyl, ethyl, and phenyl. " Funny, most plasticizers end in "ethyl" So....if you are right....adding a protective coating of plasticizers to something made of plasticizers will cause it to lose plasticizers. Doesn't make much sense to me. [/QUOTE]

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