Detail of "1565-94-2"

Reference

Dental materials for tooth repair

Dental materials for tooth repair. Mlinar, Jerry Walter; Anderson, Harvey Lawrence (Minnesota Mining and Mfg. Co., USA). Ger. Offen. DE 2705220 11 Aug 1977, 21 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C08F220-32. PRIORITY: US 76-656522 9 Feb 1976. DOCUMENT TYPE: Patent CA Section: 63 (Pharmaceuticals) Dental materials for repairing, protecting, and improving the appearance of damaged teeth comprise a polymerizable liq. org. binder, a polymn. initiator, and a powd. filler, such as .alpha.-quartz [14808-60-7], for which 70-95% of the particles have 0.7-25 .mu. diam. and 5-30% have 0.2-0.7 .mu. diam. The materials have good compressive strength, the desired transparency, and are usually formulated as 2-part pastes compns., 1 contg. the polymn. catalyst and the other contg. an activator. For example, .alpha.-quartz was heated at 1000.degree., quenched in H2O, dried, and ground to a powder with 100% of the particles <21 .mu. diam. and 75% with diam. <5.4 .mu.. The powd. quartz was mixed with 4% colloidal SiO2 thickener and then with 8% (based on quartz + SiO2) of a 50% .gamma.-methacryloxypropyltrimethoxysilane [2530-85-0] soln. in toluene. The mixt. was sprayed into thin layers, dried and cooled. One part of a 2-part dental formulation comprised a paste of triethylene glycol dimethacrylate [109-16-0] 48.8, N,N-bis(2-hydroxyethyl)-p-toluidine 2.5, bisphenol A glycidyl methacrylate [1565-94-2] 46.5, and the powd. filler 525 g. The 2nd paste contained Bz2O2 1.1, triethylene glycol dimethacrylate 48.7, bisphenol A glycidyl methacrylate 49.3, the powd. filler 525 g, and a small amt. of substituted phenol polymn. inhibitor. Equal vols. of the 2 pastes were mixed for 20 s, and hardened in 2 min to form a compn. with 3867 kg/cm2 compressive strength after 24 h immersion in H2O at 37.degree..

Composites for dental use

Composites for dental use. (Tokuyama Soda Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58152804 A2 10 Sep 1983 Showa, 13 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: A61K006-02. APPLICATION: JP 82-35195 8 Mar 1982. DOCUMENT TYPE: Patent CA Section: 63 (Pharmaceuticals) Composites for dental use consist of a mixt. of spherical inorg. oxides with different diams. and polymerizable vinyl monomers. The composites had a high surface hardness, more resistant to abrasion and had a high bonding strength. As an example, a mixt. contg. tetraethyl silicate [78-10-4] and MeOH was gradually added to a mixt. contg. MeOH and NH4OH. The resultant mixt. was evapd., heated at 1000° and pulverized to form silica particles with diam. of 0.18-0.24 mm. The particles were treated with g-methacryloxypropyl trimethoxysilane and mixed with bisphenol A glycidyl methacrylate [1565-94-2] and triethylene glycol dimethacrylate [109-16-0] to produce a paste composite. The composite was mixed with N,N-dimethyl-p-toluidine (paste A) or with Bz2O2 (paste B). An equal amt. of paste A and paste B were mixed at room temp. for 3 s. The compressive strength was 4100 kg/cm2, bonding strength with 760 kg/cm2 and the surface hardness was 70.0.Except for chemicals metioned above, 3524-68-3 and 78-10-4 are also used. .