Chinese strobe/glitter composition from patents

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Yus
Posts: 35
Joined: Sat Feb 09, 2019 10:38 am

Chinese strobe/glitter composition from patents

Post by Yus » Mon Oct 07, 2019 6:08 pm

Have anybody used espacenet for searching chinese fireworks (strobe/glitter) composition and worked with them?
https://worldwide.espacenet.com/advance ... cale=en_EP
I have found some. What do you thing they are correct?
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Red flash inner core (CN1598474)
SrCO3 – 45-50%,
KClO4 – 26-30%,
Mg – 16-20%,
SGRS – 5-6%.
-----------------------------------------
Glowing ray flash star (CN100999429)
BP – 40-60%,
Sb2S3 – 6-8%,
Ba(NO3)2 – 18-22%,
Al – 10-20%,
Dextrin – 3-6%.
-----------------------------------------
White flash-flower effect (CN1936492)
CuO – 15-45%,
Ba(NO3)2 – 15-45%,
AlMg – 15-50%,
Dextrine – 1-3%.
---
KNO3 – 35-65%,
S – 2-15%,
C – 20-50%,
Dextrin – 4-8%.
---
Cores/Matrix = 20-50%/50-80%.
-----------------------------------------
Color changing flash willow (CN101481288)
BP – 65-75%,
C – 20-35%.
---
CuO – 40-60%,
AlMg – 25-35%,
S -5-10%,
Cryolite – 8-15%,
Dextrin – 3-5%.
---
Granules/Matrix = 3/10
-----------------------------------------
Light yellow twinkling effect (CN103694071)
BP – 60-70%,
S – 5-10%,
Ba(NO3)2 – 3-10%,
BaCO3 – 3-10%,
Al – 5-15%,
CuO – 3-10%,
SGRS – 5-10%.
-----------------------------------------
Colorful whistling type firework (CN106380362)
4-chloro-3-nitro-phthalate – 10-15%,
Potassium biphthalate – 15-30%,
Barium (calcium or strontium) perchlorate – 20-30%,
Potassium perchlorate – 35-50%,
Carbon (bamboo charcoal or activated carbon) – 1-5%,
Metal powder (Ti, Al, AlMg) – 1-5%.
-----------------------------------------
White flash composition (CN103601604)
Ba(NO3)2 – 60%,
AlMg – 30%,
KNO3 – 5 %,
Bi2O3 – 2%,
SGRS – 3%.
-----------------------------------------
etc.

Yus
Posts: 35
Joined: Sat Feb 09, 2019 10:38 am

Re: Chinese strobe/glitter composition from patents

Post by Yus » Sat Oct 12, 2019 11:00 am

White flash-flower effect (CN1936492)

https://youtu.be/W_bT9_bOs9k

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richardh08
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Re: Chinese strobe/glitter composition from patents

Post by richardh08 » Sat Oct 12, 2019 12:29 pm

Well done for getting an effect from that patent document. I assume the two examples in your video are derived from the two approximate compositions that are specified in CN1936492. As I see it, the problem is that we don't really know what the effect is supposed to be. With the given range of proportions in the one containing Ba(NO3)2, I reckon you could come up with anything between a mixture that is virtually unignitable and an almost explosive flash. I see that the second composition is supposed to be the body of a matrix star, in which case the first ought to be formed into embedded grains in order to get the effect that is being patented (whatever it is).

In my experience, Chinese pyro patents appear to be written with the express intention of making it as difficult as possible to reproduce the desired effect, assuming you know what that effect really is.

In particular, I have severe doubts about CN106380362, given that most alkaline earth perchlorates are very hygroscopic, if not deliquescent.
Even when I'm wrong, I'm convincing.

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Pyro-Gear
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Re: Chinese strobe/glitter composition from patents

Post by Pyro-Gear » Sat Oct 12, 2019 1:20 pm

Back in 2013, it was required to produce documentation of the chemicals used in consumer fireworks see hear:
https://www.phmsa.dot.gov/sites/phmsa.d ... micals.pdf

Apex fireworks and also standard fireworks submitted documentation I think you can find the files on pyro bin.

However although the chemicals are shown for a listed effect and they all add up to a 100, take it with a pinch of salt I tested a few and found them to be lacking in fact awful.

Yus
Posts: 35
Joined: Sat Feb 09, 2019 10:38 am

Re: Chinese strobe/glitter composition from patents

Post by Yus » Sat Oct 12, 2019 2:54 pm

1. Some of the abstracts in espacenet.com have bad translation. I also check originals. I agree that some compositions do not work properly. For example, red star from CN1598474 burn with white smoke. But corrected work better.
2. CN100999429 and CN103694071 give glitter effect. Close to Winokur ones. Certain compositions are inside of the body in the main text.
3. Microstars from CN1936492 give exellent effect in matrix comet as well as in fountain. They produce different blooms/sparks and noise.

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Pyro-Gear
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Re: Chinese strobe/glitter composition from patents

Post by Pyro-Gear » Sat Oct 12, 2019 6:12 pm

Yus I found the given formulas by Apex and Standard for ground blooms and crackling flower to work well, however, you don’t need to be a rocket scientist to get an effect with copper oxide/Magnalium/ and nitrocellulose also known as the binder, here is a test on the standard fireworks publication this is one star:
https://www.youtube.com/watch?v=aVRNWKIQtUc

Yus
Posts: 35
Joined: Sat Feb 09, 2019 10:38 am

Re: Chinese strobe/glitter composition from patents

Post by Yus » Sat Oct 12, 2019 7:45 pm

OK. Thank you.

Yus
Posts: 35
Joined: Sat Feb 09, 2019 10:38 am

Re: Chinese strobe/glitter composition from patents

Post by Yus » Wed Oct 16, 2019 6:37 pm

Red + crackling = red strobe microstars.

https://youtu.be/lN4EmRcoOFQ

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