Formulas for home brewed photosensitive resins.

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seasicksinbad
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Formulas for home brewed photosensitive resins.

Postby seasicksinbad » Thu May 08, 2014 11:26 pm

I thought it might be interesting to start a thread on formulas for photosensitive resins.
I remember years ago I experimented a bit on the subject, creating a very simple yet practical UV sensitive resin mixing Polyester resin with Potassium Dichromate.
Potassium Dichromate is a very powerful oxidizer and must be treated with respect.
I believe I dissolved it first with alcohol and then I mixed it with the Polyester resin.
Time flies like an arrow, fruit flies like a banana.

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@A2
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Re: Formulas for home brewed photosensitive resins.

Postby @A2 » Fri May 09, 2014 4:49 am

I would like to see the development of a vegitable based UV resin. The following papers indicate that it's possible, or offer introductions to the topic.

A Fully Biobased Epoxy Resin from Vegetable Oils: From the Synthesis of the Precursors by Thiol-ene Reaction to the Study of the Final Material
March 2011
Grapeseed oil

In this article, we describe the functionalization of grapeseed oil (GSO) with amine groups involving the thiol-ene reaction.

This article developed the scientific methodology used to produce a polyamine from an unsaturated vegetable oil using the reaction of cysteamine chloride and UV-initiated thiolene chemistry.

Thus, we present here a new concept for the synthesis of polyamine based on unsaturated triglycerides thanks to the thiol-ene reaction.

... click-chemistry concept. This simple reaction is very attractive due to its simple processing despite
unpleasant odor of mercaptans. It can be performed under thermal initiation or UV light irradiation with higher reaction rates.

In this context, thiol-ene chemistry (TEC) represents a direct and efficient method for the introduction of amine group into vegetable oil. The reaction can be performed in air without the complication of competing side reactions with oxygen.
http://hal.archives-ouvertes.fr/docs/00 ... POLSCI.pdf

UV-Curable, Seed Oil-Based Coatings by Cationic Photopolymerization: Part 2
Linseed oil
http://radtechreport.org/RT-Reports/sep ... rt%202.pdf

Plant oil-based uv-curable coating US 20120202909
acrylated plant oil such as acrylated epoxidized soybean oil.
https://www.google.com/patents/US201202 ... CDUQ6AEwAA

DEVELOPMENT OF NOVEL BIO-BASED POLYOLS AND THEIR DERIVATIVES FOR LOW VOC COATINGS APPLICATIONS
Eastern Michigan University
http://www.reeis.usda.gov/web/crisproje ... tions.html

SYNTHESIS AND CHARACTERIZATION OF ACRYLATED EPOXIDIZED SOYBEAN OIL FOR UV CURED COATINGS
Acrylated Epoxy Soybean Oil, January 28, 2011
http://ena.lp.edu.ua:8080/bitstream/ntb/11180/1/13.pdf

Highly Functional Acrylated Biobased Resin System for UV-Curable Coatings
2011
http://radtechreport.org/RT-Reports/spr ... atings.pdf

An outline of UV resins:
http://www.esf.edu/outreach/uvebwebinar ... 12_MJI.pdf

Soy-based Polymer Building Blocks: - A Sustainable Platform for Advanced Coating
Eastern Michigan University
http://www.michigan.gov/documents/deq/d ... 3196_7.pdf

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PacManFan
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Re: Formulas for home brewed photosensitive resins.

Postby PacManFan » Fri May 09, 2014 9:41 am

Good references!
I was just at 3D/DC the other day, and I met some fellow students of AndersonTA who have created organic-compatible UV resins. I may have to ask him to chime in on this.

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sgraber
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Re: Formulas for home brewed photosensitive resins.

Postby sgraber » Fri May 09, 2014 2:39 pm

Currently the bulk of the products on the market are non-vegetable-based formulations. That said, "green" chemistry would be nice, but it'll also come at a cost. Are you willing to pay a premium for a vegetable/bio-based formulation?
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seasicksinbad
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Re: Formulas for home brewed photosensitive resins.

Postby seasicksinbad » Fri May 09, 2014 6:06 pm

I just bought a pound of clear epoxy form smooth-on and ordered a sample of a cationic photoinitiator to start experimenting.
I also ordered Sun Cure Ultra Violet Catalyst UVC 2000, which I plan on mixing with polyester resin ( fiberglass resin ) and the clear epoxy. Epoxy and Polyester tend do be hard and brittle so I might need to put an additive to make them somewhat flexible.
Pigments to prevent light from bleeding.
I'll keep you posted on the results.
Time flies like an arrow, fruit flies like a banana.

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@A2
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Re: Formulas for home brewed photosensitive resins.

Postby @A2 » Thu May 15, 2014 7:04 pm

@seasicksinbad:
Great, looking forward to following your progress.

seasicksinbad wrote:I just bought a pound of clear epoxy form smooth-on and ordered a sample of a cationic photoinitiator to start experimenting.
I also ordered Sun Cure Ultra Violet Catalyst UVC 2000, which I plan on mixing with polyester resin ( fiberglass resin ) and the clear epoxy. Epoxy and Polyester tend do be hard and brittle so I might need to put an additive to make them somewhat flexible.
Pigments to prevent light from bleeding.
I'll keep you posted on the results.


Please provide links to the suppliers and resins that you purchased.

Here is another thread about DIY resins.
What do you need to make UV-curing resins?
http://forums.reprap.org/read.php?70,10142

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@A2
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Re: Formulas for home brewed photosensitive resins.

Postby @A2 » Fri May 16, 2014 9:56 am

Resin recipes
http://tjsnyman.com/tjsnymanblogspot/?page_id=531

CYTEC
RADCURE ENERGY CURABLE RESINS From cytec these guys are great and helpfull. And dilutants TMPTA for ADDITOL and EBECRYLS…EBECRYL UV-curable resins and oligomers
UCECOAT waterborne UV-curable resins
ADDITOL photoinitiators and additives
RAYLOK UV-curable resins
UVEKOL Glass laminating system
http://www.cytec.com/businesses/additive-technologies

Sigma Aldrich
1) 98 ml Poly(ethylene glycol) diacrylate CAS 26570-48-9 Sigma Aldrich # 437441

2) 2 grams of Phenylbis (2,4,6-trimethylbenzoyl)phosphine oxide (Irgacure 819) CAS 162881-26-7 Sigma Aldrich #511447

3) 0.02 grams of Sudan 1(one) (also known as …1-Phenylazo-2-naphthol…) CAS 842-07-9 Sigma Aldrich # 103624…thats it for recipe 1
http://www.sigmaaldrich.com/united-states.html

Photoinitiators for UV curing
http://people.rit.edu/deeemc/courses/03 ... curing.pdf


I have to use a wax in a carrier monomer type liquid to form the chain bonds. known as
TRPGDA (Tripropylene glycol diacrylate) from SHAMROCK TECHNOLOGIES inc. in their “everglide range of products” UV-691 , UV-636 , UV-600D , UV-395D

Fluoropolymers and Waxes
http://www.shamrocktechnologies.com/pdf ... atings.pdf

How to mix UV resin, Recipes:
http://reaktor23.org/de/projects/3dprinter
Three-Dimensional Printing Using a PhotoinitiatedPolymer
http://reaktor23.org/_media/de/thinktan ... olymer.pdf

Colby
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Re: Formulas for home brewed photosensitive resins.

Postby Colby » Fri Oct 03, 2014 12:04 pm

Hi I'm new on this forum but found a great deal of interesting info on third-party resin for SLA printers. I'm particularly interested in the bio-based resin that would be compatible with the new SLA printers out there.

@A2 do you know if anybody is pursuing this idea, whether it is based on the paper you mentioned or on other sources?

benty
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Re: Formulas for home brewed photosensitive resins.

Postby benty » Tue Jan 27, 2015 1:58 am

Hi A2,For a UV-curable resin to be suitable for 3D printing i guess the critical property must be how photosensitive it is, to maximize print speed. I'm a chemist by profession but i haven't any experience with polymer chemistry, and i think i'd like to read up on the subject. What mechanism(s) cause a material to photopolymerise, and how would one optimize this behaviour? I've read some very interesting hints about what might be done, like cooking a UV-resin from linseed oil (Green Chem, 2011, 13, 1014 DOI: 10.1039/c1gc15038c). With a bit of research, it sounds to me like it would be possible to make your own resin from mostly renewable, dirt-cheap or even self-produced precursors. I also read somewhere about someone who built a kayak with epoxy resin synthesized from, i think it was, linseed oil, but i can't find any details on this. Epoxy is a bit pricey, it'd be awsum to be able to DIY in my opinion. Anyone else here thinking in these patterns? Is there any opensource development being done in this area? I am waiting for your hopeful reply..Keep in touch with us..Thanks in Advance :D :D

DocMaster
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Re: Formulas for home brewed photosensitive resins.

Postby DocMaster » Mon Mar 30, 2015 11:39 am

Ember's Resin is Now Open-Source!!

Autodesk Standard Clear Prototyping Resin for Ember (all percentages are wt/wt)
Oligomer: Allnex Ebecryl 8210 39.776%, Sartomer SR 494 39.776%
Photoinitiator: Esstech TPO+ (2,4,6-Trimethylbenzoyl-diphenyl-phosphineoxide) 0.400%
Reactive diluent: Rahn Genomer 1122 19.888%
UV blocker: Mayzo OB+ (2,2’-(2,5-thiophenediyl)bis(5-tert-butylbenzoxazole)) 0.160 %

IMPORTANT NOTICE: The Autodesk Standard Clear Prototyping Resin (PR48) is intended for professional use only. We are releasing the chemical formula for PR48 pursuant to the terms of the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) license. Working with this formula is at your own risk, and as a result, you are solely responsible for (a) complying with all applicable laws, rules and regulations and (b) any and all results and liabilities, including personal and property damage, arising in connection with such work. BEFORE you undertake any work with the formula, we recommend that you review carefully the safety warning notifications and the Material Safety Data Sheet for PR48 here. Autodesk expressly disclaims all warranties (including those attendant to the Autodesk® 3D Ember Printer) in relation to your creation, use or distribution of the formula.

Source: http://spark.autodesk.com/blog/embers-resin-now-open-source