Reference

Determination of the amine catalyst from Niax Catalyst A-1, a product used in the manufacture of flexible polyurethane foams based on a conventional polyether

Determination of the amine catalyst from Niax Catalyst A-1, a product used in the manufacture of flexible polyurethane foams based on a conventional polyether. Oprescu, Didina; Oprescu, Mihai (Inst. Politeh. "Traian Vuia", Fac. Tehnol. Chim., Timisoara, Rom.). Rev. Chim. (Bucharest), 35(7), 634-6 (Romanian) 1984. CODEN: RCBUAU. DOCUMENT TYPE: Journal CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 35, 80 Using K3[Cr(NCS)6].4H2O and p-toluidene×H[Cr(NCS)4(p-toluidene)2] [19453-08-8] as reagents, the av. content of bis(2-dimethylaminoethyl) ether [3033-62-3] in Niax A-1 was detd. by gravimetric and spectrophotometric methods to be 68.5 ± 0.4%, with good correlation between the methods.

Polyurethane catalysts in polyurethane foam process

Polyurethane catalysts in polyurethane foam process. Jachimowicz, Felek (Grace, W. R., and Co., USA). U.S. US 4450246 A 22 May 1984, 9 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08G018-14; C08G018-18. NCL: 521129000. APPLICATION: US 82-436814 26 Oct 1982. DOCUMENT TYPE: Patent CA Section: 39 (Synthetic Elastomers and Natural Rubber) Section cross-reference(s): 67 A process for producing polyurethane foams comprises reacting an org.In this article, certain chemicals are used. One of their cas registry numbers is 66225-39-6 polyisocyanate with a polyester or polyether polyol in the presence of a catalytic amt. of amine selected from the group having the structural formula: Me2NCH2CH2CHR1R2 [X]n (I) or II, where R1 = Me or Et and R2 = H or Me, such that when R1 is Me, R2 is Me and when R1 is Et, R2 is H, and X is an org. mono- or dicarboxylic acid, and n = 0-1. Thus, polyurethane foams were prepd. by reacting 10 parts of polyether or polyester polyol with 0.55-5.85 parts TDI or MDI in the presence of 0.10-0.20 parts N,N-dimethylamylamine (III) [26153-88-8], N,N-dimethylisoamylamine (IV) [2315-43-7], or isoamylpyrrolidine (V) [4462-08-2] dissolved in dioxane. III, IV, and V were superior to other di-Me C5-alkylamines in causing gelation to occur, esp. with respect to polyols/polyisocyanates used to form flexible and high-resiliency foams. The three amine catalysts were substantially equiv. to the com. bis(2-dimethylaminoethyl) ether [3033-62-3]. .