Recent Topics
2000 satur n l series ok? 108,000 miles
by ziggy
07/16/18 03:33 AM
Help me pick a oil for equinox
by Dylan1303
07/16/18 01:28 AM
Turbo motor raspy exhaust
by Dylan1303
07/16/18 12:59 AM
1995 Buick Roadmaster. Low speed metallic noise
by 10WSmuckers
07/15/18 11:48 PM
Vornado fan
by Throt
07/15/18 11:19 PM
Wash Pads - Tried Three
by JHZR2
07/15/18 09:24 PM
Which UTF/UTHF for Allis Chalmers D17?
by SOHCman
07/15/18 09:16 PM
98 leaves needs work or 02 taurus,which one?
by ziggy
07/15/18 09:06 PM
equinox 0W40
by mobilaltima
07/15/18 09:00 PM
New/Old F1 guy?
by Camprunner
07/15/18 08:28 PM
Schaeffer's on "Wicked Tuna"
by salesrep
07/15/18 08:14 PM
AMSOIL Euro Classic 5W-40 (EFM)
by The Critic
07/15/18 06:27 PM
Occasional battery dummy light
by dja4260
07/15/18 05:59 PM
Weird experience with old separating brake grease
by d00df00d
07/15/18 05:54 PM
Ceiling Finish Help
by coopns
07/15/18 05:10 PM
Thunderbird to Outlook Converters??
by doitmyself
07/15/18 04:41 PM
Blaines does it again
by Nitronoise
07/15/18 04:40 PM
BMW E34/M60 Water Pump Replacement
by kschachn
07/15/18 03:30 PM
Okra: how do you make it and like it?
by car51
07/15/18 03:28 PM
2005 Sienna trans issue
by i6pwr
07/15/18 01:46 PM
Newest Members
Teggy695, DrDanger, XCIDMigs, DONWATERS, VWhite
65487 Registered Users
Who's Online
36 registered (Bighorn2500, andyd, 2015_PSD, 87sammy, 54steve, Astro_Guy, 3 invisible), 949 Guests and 40 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65487 Members
67 Forums
287089 Topics
4790307 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Page 1 of 2 1 2 >
Topic Options
#4563461 - 11/03/17 10:37 PM Ever wonder how RainX works?
Scienceman Offline


Registered: 10/04/09
Posts: 2859
Loc: Earth
Glass is mostly silicone dioxide, which means the molecules are overall polar (unequal distribution of charge as a result of the atomic structure). This polar surface can be overcome by doing some organic chemistry, called silanization. Adding certain compounds, like hexamethyldisilazine adds non-polar group to the glass surface.

Remember, water is a polar molecule. Like attracts like. By adding a non-polar functional group to the glass structure, the water beads and is repelled.



Image: Glass (polar)+ RainX (adds CH3 non polar groups)-> Beading water (repelled by non polar groups)!


Edited by Scienceman (11/03/17 10:46 PM)

Top
#4563471 - 11/03/17 10:45 PM Re: Ever wonder how RainX works? [Re: Scienceman]
FordBroncoVWJeta Offline


Registered: 04/16/16
Posts: 786
Loc: KS
I feel like i'm back in math class. Even though you explained everything, I feel more stupid than when you began.
_________________________
17 Volkswagen Jetta 1.4T
15 Honda CRV 2.4
12 Volkswagen Jetta 2.0
01 Pontiac Sunfire 2.2

Top
#4563472 - 11/03/17 10:45 PM Re: Ever wonder how RainX works? [Re: Scienceman]
Artem Offline


Registered: 10/30/10
Posts: 5131
Loc: Florida
Interesting. Never looked at the science behind Rain-X. I use it on my Semi Truck every time rain is forecast along my route. I end up not using my windshield wipers AT ALL during light showers because the water flies off and the beading action makes it see thru. Idk how people drive without it.
_________________________
2014 Mazda 3 Hatch 2.0L & 6spd - Idemitsu 0w20 Synthetic @ $0.75 a quart. (thanks Advance Auto Parts for the awesome deal)

Top
#4563474 - 11/03/17 10:47 PM Re: Ever wonder how RainX works? [Re: FordBroncoVWJeta]
Scienceman Offline


Registered: 10/04/09
Posts: 2859
Loc: Earth
Originally Posted By: FordBroncoVWJeta
I feel like i'm back in math class. Even though you explained everything, I feel more stupid than when you began.


Never to old to learn!


Edited by Scienceman (11/03/17 10:47 PM)

Top
#4563524 - 11/04/17 12:34 AM Re: Ever wonder how RainX works? [Re: Scienceman]
Linctex Offline


Registered: 12/31/16
Posts: 6186
Loc: Waco, TX
Originally Posted By: Scienceman
Originally Posted By: FordBroncoVWJeta
I feel like i'm back in math class. Even though you explained everything, I feel more stupid than when you began.

Never to old to learn!


Agreed.

Even though chemistry doesn't come naturally,
I understand how polars work and I get the Gist of it.

Thanks for posting!
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

Top
#4563539 - 11/04/17 01:09 AM Re: Ever wonder how RainX works? [Re: Scienceman]
OneEyeJack Offline


Registered: 09/14/10
Posts: 7485
Loc: S California
You've just ruined it. I thought it was magic.

They're going to try and sell that stuff in Southern California but they're still waiting for it to rain hard enough to get windshields wet. Their expectations are high. Last year it rained so hard once that several puddles formed. Maybe they'll try again next year.

They were going to push the idea of keeping the windshield clear of snow but they couldn't find anyone that had ever driven in the snow.

Top
#4563555 - 11/04/17 03:06 AM Re: Ever wonder how RainX works? [Re: OneEyeJack]
4WD Offline


Registered: 09/21/10
Posts: 6527
Loc: Texas
Magic is what it takes to get that Slime-X off the glass

Top
#4563591 - 11/04/17 05:39 AM Re: Ever wonder how RainX works? [Re: FordBroncoVWJeta]
d00df00d Online   content


Registered: 10/20/05
Posts: 11253
Loc: PA
Originally Posted By: FordBroncoVWJeta
I feel like i'm back in math class. Even though you explained everything, I feel more stupid than when you began.

Water is made of polar molecules. So is glass. Polar things are attracted to each other. So, when water lands on your glass windshield, it more or less stays there until it's wiped off.

RainX is made of molecules that have a polar side and a non-polar side. When you put it on your windshield, the polar sides of the molecules stick to your glass -- because, again, polar things are attracted to each other. But that means the non-polar sides end up facing outward. So, when water lands on them, it lands on the non-polar side. There's no attraction there, and the water just slides off.
_________________________
2011 Mazda RX-8 R3
Mobil Super 5w-20

Top
#4563615 - 11/04/17 06:23 AM Re: Ever wonder how RainX works? [Re: Scienceman]
Shannow Online   content


Registered: 12/12/02
Posts: 40129
Loc: 'Stralia
So per the post and the pics, RainX is actually a chemical treatment of the glass, rather than a coating.

I thought that with all the fapping around trying to buff it out that it was a coating...then thought that the washer additive wasn't useful for the same reason.

Thanks for the post, that's pretty cool...I've always been a user of the product, as it works.

Top
#4563618 - 11/04/17 06:40 AM Re: Ever wonder how RainX works? [Re: Shannow]
d00df00d Online   content


Registered: 10/20/05
Posts: 11253
Loc: PA
Originally Posted By: Shannow
So per the post and the pics, RainX is actually a chemical treatment of the glass, rather than a coating.

I thought that with all the fapping around trying to buff it out that it was a coating...then thought that the washer additive wasn't useful for the same reason.

Thanks for the post, that's pretty cool...I've always been a user of the product, as it works.

Oh wow -- you're right.

I retract my previous post. Hadn't looked at the diagram closely. Epic derp.
_________________________
2011 Mazda RX-8 R3
Mobil Super 5w-20

Top
#4563653 - 11/04/17 08:16 AM Re: Ever wonder how RainX works? [Re: Scienceman]
Papa Bear Offline


Registered: 08/11/05
Posts: 7072
Loc: Leamington, ON, Canada ..... r...
Originally Posted By: Scienceman
Originally Posted By: FordBroncoVWJeta
I feel like i'm back in math class. Even though you explained everything, I feel more stupid than when you began.


Never to old to learn!


"TOO" old to learn wink2
_________________________
2016 Dodge GC Deep Cherry
2013 SYM Wolf Classic 150
2011 Suzuki S40 650
2009 V-Star 250
https://www.hogsforhospice.com/

Friend of Bill W. since '89


Top
#4563680 - 11/04/17 09:02 AM Re: Ever wonder how RainX works? [Re: Papa Bear]
Scienceman Offline


Registered: 10/04/09
Posts: 2859
Loc: Earth
Originally Posted By: Papa Bear
Originally Posted By: Scienceman
Originally Posted By: FordBroncoVWJeta
I feel like i'm back in math class. Even though you explained everything, I feel more stupid than when you began.


Never to old to learn!


"TOO" old to learn wink2


You caught me! Never said I loved English!

Top
#4563711 - 11/04/17 09:35 AM Re: Ever wonder how RainX works? [Re: Scienceman]
SHOZ Offline


Registered: 06/28/03
Posts: 5801
Loc: Illinois
Just did both cars yesterday prior to winter driving. I've found it much easier to do when the temperature is around 50F out.

Thanks for the explanation.
_________________________
2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual

Top
#4563734 - 11/04/17 09:53 AM Re: Ever wonder how RainX works? [Re: Scienceman]
Virtus_Probi Offline


Registered: 06/25/15
Posts: 4042
Loc: New England
Where did the nitrogen go??
_________________________
2014 Forester XT, 86000 miles
Last Change;
M1 5W30 d1G2
Tokyo Roki 15208AA170 filter

Top
#4563743 - 11/04/17 10:06 AM Re: Ever wonder how RainX works? [Re: Scienceman]
Al Offline


Registered: 06/08/02
Posts: 18094
Loc: Elizabethtown, Pa
Thanks
_________________________

Top
Page 1 of 2 1 2 >