diisopropanol-para-toliidine basic information

Englishnames：

diisopropanol-para-toliidine

Englishsynonyms

N, n-dihydroxypropyl p-toluidine

N, N-bis (2-hydroxypropyl) p-toluidine

N, N-bis (2-hydroxypropyl) p-toluidine

Dihydroxypropyl p-toluidine

Marble glue accelerator

CAS no.:

38668-48-3

Molecular formula:

C13H21NO2

molecular weight:

223

Product pictures：

diisopropanol-para-toliidine Physical properties

Melting point

106 — 110 °C(lit.)

appearance

White acicular crystals

Storage conditions

Store in dark, 2-8°C

period of validity

180 days

diisopropanol-para-toliidine Purpose and synthesis method

Use

N, N-diisopropyl alcohol to toluidine chemical stability, no odor, no irritation, low toxicity, convenient storage and transportation. It has high activity and good solubility with monomers. It is suitable for curing acrylic vinegar or other olefin monomers at room temperature. It is a promising new polymerization promoter. Because of the addition of organic peroxide in methyl methacrylate MMA monomer, At the same time add tertiary amines, immediately REDOX reaction, a few minutes later that curing. Oxidation - reduction initiation systems have low activation energy and can generate activation centers at room temperature. It is a short chain dialcohol, as polyurethane elastomer, reaction injection molding and other polyurethane products chain extender, not only good compatibility with other raw materials, and the prepared polyurethane products have excellent mechanical properties. It is an enhanced chain extender. Used for unsaturated resin polymerization, can enhance the degree of cross-chain, with network structure, so that the polymerization of fastness and toughness greatly enhanced, shear resistance and resistance to enhance the ability. Is the production of marble gum and other unsaturated resin accelerator, can replace N,N- dimethylaniline.

application

1.In 1936, Rohm & Hess company sold organic glass, methacrylate and acrylic vinegar were used as denture base materials, in 1942, Depep (Depep) and in 1949, German Kulezr company sold in the market to fill caries. DHT is tasteless, odorless, stable in performance, simple in synthesis process, easy to obtain raw materials, low in cost, and low in toxicity. Using DHT generation DMT(methyl methacrylate 100 parts, bisphenol A bismethacrylate 6 parts, dimethyl p-toluidine 0.5 parts, UV327 ultraviolet absorption of 0.4 parts, 2, 6-di-tert-butylp-methylphenol 0.02 parts) prepared self-setting denture, In terms of self-setting time, deflection test, thermal stability, uv discoloration resistance test, etc., it conforms to the international standards of the American Dental Association (A, D, A, S).
2. Color glass color plexiglass is a new generation of plexiglass, it is basically composed of crystal layer, color base plate with different colors and shapes of the flash aluminum wire, can be infinitely combined into a variety of color and effect of color plexiglass. Before using solvent method to bond or with oil press pressed and become, the process is complicated, production efficiency is low. Now with casting method production, very simple. Weigh DPO and DMT according to the formula, pour the MMA into the prepolymer with a certain viscosity after diffusion and dissolution, add colorful anodized aluminum wire, immediately pour into the mold with a certain color sheet as the bottom plate has been made, remove the air, sealed flat, heat curing at room temperature for several hours, cooling out the piece. Using DHT instead of DMT to make thin film has good color, stable heat release and easy control of bubbles.
3.The separation layer casting thick plexiglass sheet, in the polymerization of heating time is very long, such as 20 mm thick plexiglass polymerization temperature of 28℃, need 48 hours to cure. When MMA or MMMA as the main component or part of a polymer monomer mixture, add the initiator BPO and promoter DHT, fast curing at room temperature for polymer, put less heat, also less volume contraction, polymerization on the surface of the body surface hardening is also good, from the perspective to shorten production cycle, save energy is very meaningful, is highly advantageous to industrial production. Such as quantitative MMA, ethylene glycol methacrylate (EDM) and quantitative DHT, and then add BPO polymerization at 25℃, hardening time 30 minutes. Surface hardness H(JISK a 5651 load of 100 kg), and ordinary plexiglass plate no different, and air contact near the surface has a very small color, all transparent.

Two pieces of 30x30mm casting plate with a thickness of 20mm are arranged into a 3mm gap, and the three sides around it are sealed with cellophane. After adding quantitative DHT and BPO, the plate is decompressed and defoamed and then injected between the two plates. It is left standing at 23℃ for 20 hours and heated at 80℃ for 6 hours, and the thickness of the plate is 43 mm. Adhesion part without bubbles, transparent and no coloring, the end face of the processed plate and the original plate almost no boundary line.

4.Room temperature curing adhesive can be seen everywhere in daily life, the fastest development, is epoxy resin. According to the process characteristics of the adhesive in the range of 20~30℃ curing adhesive called room temperature curing adhesive. Acrylic structural adhesive is also a room temperature curing adhesive, which includes the first generation of acrylic structural adhesive, the second generation of acrylic structural adhesive (graft copolymerization) and the third generation of acrylic structural adhesive (radiation polymerization). The second generation of room temperature quick curing acrylic structural adhesive introduced here has the tendency to replace epoxy resin because of its excellent impact strength and other aspects. It was put into the market abroad in 1975.

Dupont Pont Is made in a mixture of 85 grams OF MMA, 15 grams of MAA and 2 grams of EDM. Dissolve 10 grams of chlorosulfonated polyethylene (cl 43%, soc 1234%), remove 50 grams of the resulting solution and add 1.5 grams of isopropylbenzene peroxide (CHP)0.5 grams DMA under stirring condition to generate graft copolymerization on the polymer, curing time within 20 minutes, shear force 2550Psi.  It is worth mentioning that oxidants and accelerants must be used immediately after addition, which is practically inconvenient. However, polymeric, monomer and oxidizer can be used as liquid A, while accelerant can be added to the same composition instead of oxidizer as liquid B. Liquid A and liquid B are in A stable state. But A, B two liquid coated on the sticky object, after A short time to become A high adhesive strength of the miyue glue.

  For example, 300 grams of NBR dissolved in 70 grams of MMA, 50 grams plus 1 grams of BPO as liquid A, and another 50 grams plus 0.5 grams of DMT as liquid B were applied to the surface of the specimen. After 20 hours, the shear strength was 210 kg/cm 2. If DHT is used instead of DMT, the effect is the same. Structure of the second generation acrylic adhesive without solvent, anaerobic adhesive, such as heat resistance, impact resistance, chemical resistance adhesive performance is very good, the bonding surface requirement is not high, does not need special treatment, can fast curing at room temperature, suitable for the oil level and large area of adhesive, lower cost, is a development prospect of two-component mixed adhesive.

Using the principle

The promotion effect is better with pushing electron group benzene ring aromatic amines, such as N, N-dimethyl aniline (DMA),N, N-dimethyl p-toluidine (DMT),N, N-beta-n, N-dihydroxyethyl p-toluidine (DHET) and other tertiary amines. Accelerators can rapidly decompose oxidants such as benzoyl peroxide (BPO), shorten their half-life TL /2 and increase the polymerization rate. The accelerator is solid at room temperature, completely free of the unpleasant odor characteristic of amines, and hardly changes color, so it is suitable for the polymerization of general polymers.

Product introduction

Main applications: self - setting denture water, color glass production, separation layer casting, room temperature curing adhesive, etc

Product advantages

1: can be well dissolved in resin and solvent

2: non-toxic

3: No strong odor
4: polymer curing do not color, almost will not change color

5: curing ability

6: less heat release, smooth heat release, less volume shrinkage

Quality standard

Appearance of white block melt body

Content of 98.0% or higher

Moisture 1.0% or less

provider

language

Xiangyang  Meijun Machinery Technology Testing Co., LTD

English