Purely cationic photosensitive resin for 3D printing stereolithographic rapid prototyping, and preparation method and application thereof
A cationic, stereolithography technology, applied in the direction of additive processing, etc., can solve the problems of photosensitivity gap and other problems, and achieve the effect of simple steps, good photosensitivity and high precision
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[0035] Example 1.
[0036] (1) In a special 5000 ml glass three-necked flask equipped with a stirrer and a condenser, add 1,100 grams of siloxane alicyclic epoxy resin, and add 3,4-epoxycyclohexyl carboxylic acid-3 , ,4 , -Epoxycyclohexyl methyl ester 800g, 3,3-[oxybismethylene]-bis[3-ethyl]oxetane 500g, 1,4-butanediol diglycidyl ether 470 Grams, 130 grams of triarylsulfonium hexafluoroantimonate.
[0037] (2) Heat to 50°C and stir for 30 minutes to make it a transparent light yellow uniform liquid, which is a kind of photosensitive resin prepared. Measure its critical exposure E c 18.5mJ / cm 2 .
[0038] (3) The cantilever beam test pieces were fabricated using the SLA-3500 ultraviolet laser curing rapid prototyping equipment manufactured by 3DSystems, and then the test pieces were post-cured for 90 minutes in a UV box with a power of 500 milliwatts. Measured their warpage factor CF(6)=0.01, CF(11)=0.02.
[0039] (4) Using the SLA-3500 UV laser curing rapid prototyping equipment man...
Example Embodiment
[0040] Example 2.
[0041] (1) In a specially made 5000 ml glass three-necked flask equipped with a stirrer and a condenser, add 1500 g of silicone-containing cycloaliphatic epoxy resin, and add 3,4-epoxycyclohexyl carboxylic acid-3 , ,4 , -Epoxycyclohexyl methyl ester 700g, 3,3-[oxybismethylene]-bis[3-ethyl]oxetane 300g, 1,4-cyclohexanedimethanol diglycidol 370 grams of ether, 130 grams of triarylsulfonium hexafluoroantimonate.
[0042] (2) Heat to 40℃ and stir for 30 minutes to make it into a transparent light yellow uniform liquid, which is a kind of photosensitive resin prepared. Measure its critical exposure E c 17.9mJ / cm 2 .
[0043] (3) Some test pieces were made using SLA-3500 ultraviolet laser curing rapid prototyping equipment, and then the test pieces were post-cured for 90 minutes in a UV box with a power of 500 milliwatts. Measured their warpage factor CF(6)=-0.01, CF(11)=-0.02.
[0044] (4) Using SLA-3500 ultraviolet laser curing rapid prototyping equipment, some test ...
Example Embodiment
[0045] Example 3.
[0046] (1) In a special 5000 ml glass three-necked flask equipped with a stirrer and a condenser, add 1600 g of siloxane alicyclic epoxy resin and add bis(3,4-epoxycyclohexyl carboxylic acid)-hexyl Diester 600g, 3,3-[oxybismethylene]-bis[3-ethyl]oxetane 500g, polypropylene glycol diglycidyl ether 250g, triarylsulfonium hexafluoroantimony 140 grams of salt.
[0047] (2) Heat to 50°C and stir for 20 minutes to make it into a transparent light yellow uniform liquid, which is a kind of photosensitive resin prepared. Measure its critical exposure E c 16.9mJ / cm 2 .
[0048] (3) Some test pieces were made using SLA-3500 ultraviolet laser curing rapid prototyping equipment. Then, the test pieces were post-cured for 90 minutes in a UV box with a power of 500 milliwatts. Measured their warpage factor CF(6)=-0.01, CF(11)=-0.03.
[0049] (4) Using SLA-3500 UV laser curing rapid prototyping equipment, some test pieces were made according to ASTMD638 and ASTMD256 standards. T...
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