4,4 -BTDA 3,3 ,4,4 -Benzophenone dianhydride

Diisocyanate and acid dianhydride are mixed in equimolar amounts, often previously dissolved in a suitable solvent. 3,3, 4,4 -Benzophenone dianhydride (4,4 -BTDA) is mixed at room temperature with in diphenyl-methanediisocyanate using AW-dimethylformamide (DMF) as a solvent and subsequently heated in vacuum up to 210°C. A PI with a molecular... 

STRUCTURES OF RESIN STARTING MATERIALS BTDA = benzophenone tetracarboxylic acid dianhydride... 

Pis commonly have been synthesized from reactions of pyromellitic dianhydride [26265-89-4] (PMD A) or 3,3H,4 -benzophenone tetracarboxyUc dianhydride [2421-28-5] (B IDA) with a number of diamines like 2,2-bis(4-aminophenyl)propane, 2,2-bis(4-amino-3-methylphenyl)propane, I,I-bis(4-aminophenyl)-I-phenylethane, and 1,1-his(4-amino-3-methy1pheny1)-1-phenylethane (5). The PMDA-based Pis were thermally more stable than the corresponding Pis obtained from BTDA. 

Two polymers have been prepared with the benzophenone tetracarboxylic dianhydride (BTDA) and either bis-l,3-(4-aminophenoxy)-benzene or bis-l,3-(4-aminophenoxy)-2-cyano-benzene (Fig. 5.6). Both polymers are soluble in NMP and their Tg values are respectively 191 and 243°C.59... 

Bottle waste, hydrolysis of, 564 Bottles PET, 21 recycled, 532 Branched polymers, 8 Branching, 13 Branching agents, 8 Branching sequence distributions, 446 Brill temperature, 142 Brominated epoxy reagents, 414 Bromination-lithiation, 354 BTDA. See 3,3, 4,4 -Benzophenone-tetracarboxylic dianhydride (BTDA)... 

Benzophenone process, 73 583 Benzophenonetetracarboxylic dianhydride (BTDA), 70 406, 407t Benzophenone trifluoroborane, 4 1441 Benzopyran Red, colorant for plastics,... 

Polyimides derived from 3,3, 4,4 -benzophenone tetracarboxylic acid dianhydride (BTDA), I, and 3,3 -diaminobenzophenone (m,m -DABP), IIA, 4,4 -diaminobenzophenone (p,p -DABP), IIB, or 4,4 -oxydianiline, IIC, (and to which have been added numerous metal compounds) have been prepared. The synthetic procedure em-... 

Starting materials and solvents were purchased from Aldrich Chemical Co. acetonitrile (ACN), N,N-dimethylformamide (DMF), and N-methyl-2-pyrrolidone (NMP) were obtained anhydrous in Sure/Seal bottles and used as received. The polyamic acid of PMDA-ODA (2545 Pyralin) was supplied by DuPont. The soluble polyimide XU-218, derived from 3,3, 4,4 -benzophenone tetracarboxylic dianhydride (BTDA) and diamino-1,1,3-trimethyl-3-phenylindan isomers (DAPI) was purchased from Ciba-Geigy Corp. The acetylene terminated imide oligomer powder (Thermid MC-600) derived from BTDA, aminophenylacetylene, and 1,3-bis (2-aminophenoxy) benzene (APB) was obtained from National Starch and Chemical Company. Kapton Type II (PMDA-ODA) films were obtained from DuPont Co., Apical polyimide films were obtained from Allied Corp., and Upilex Type-S and Type-R polyimide films derived from 3,3, 4,4 -biphenyl tetracarboxylic dianhydride (BPDA) plus p-phenylenediamine (PDA) and ODA, respectively were obtained from ICI Americas Inc. 

Attempts to substitute benzophenone tetracarboxylic dianhydride (BTDA) for BPADA failed to produce high-molecular-weight copolymers because of the insolubility of the BTDA-mPD oligomers. A variety of solvents and solvent combinations were tried but were unsuccessful in solubilizing the intermediate oligomers. 

Block, Ledwith and Taylor (46) have reported the results of a detailed investigation into the efficiencies of benzof enone, 3,3, 4,4 -benzo-phenone tetracarboxylic dianhydride (BTDA) and 3,3, 4,4 -tetramethoxy-carbonyl benzophenone (TMCB) as photoinitiators for the polymerization of methyl methacrylate in tetrahydrofuran at C in vacuo. 

The feasibility of utilising similar intramolecular hydrogen abstraction reactions for photoinitiation was therefore tested (55). Reactions of 3,3, 4,4 -benzophenone tetracarboxylic dianhydride (BTDA) with primary n-alkyl amines readily yield a series of N-substitut i imides. 

Generally, synthesis of dianhydrides is somewhat more complex than that of diamines and until recent time pyromellitic dianhydride (PMDA) and benzophenone-3,3, 4,4 -tetracarboxylic dianhydride (BTDA) had been the only commercially produced aromatic dianhydrides. Some of the significant commercial products developed recently, are Upilex by UBE Ind. and Ultem by General Electric. The former is based on biphenyl-3,3, 4,4 -tetracarboxylic dianhydride (BPDA) and the latter on 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride or bisphenol A dianhydride (BPA-DA). BPDA is produced by oxidative coupling of inexpensive phthalic acid esters in the presence of palladium catalyst [23, 24]. 

Another example is the Friedel-Crafts phosgene reaction with 0.xylene giving 3,3, 4,4 -tetramethylbenzophenone in high yield and free of isomers (Ref. 14). This substituted benzophenone is easily oxidized into benzophenone tetra-carboxylic acid dianhydride (BTDA) widely used for the manufacture of polyimides [Scheme 18] ... 

PI-2545, and from 3,31,4,41-benzophenone tetracarboxylic dianhydride (BTDA) and ODA, PI-2555. Meta-phenylenediamine (MPD) is also present in PI-2555 as a minor component Q). Its presence has a negligible affect on the results of this study, other than a possible broadening of the spectral band ascribed to the rotation of the imide-phenyl bond, and hence will not be discussed further. 

The polyamic acids were prepared in these laboratories using modifications of a standard preparation (7). Benzophenone tetracarboxylic acid dianhydride (BTDA), benzenetetracarboxylic acid dianhydride (pyromellitic dianhydride PMDA), oxydianiline (ODA), 1,4-phenylenediamine (PDA) and 1,3-phenylenediamine (MPDA) were all obtained from Aldrich Chemical Co. The S -biphenyl tetracarboxylic acid dianhydride (BPDA) was obtained from Ube Chemical Company. The polyamic acids were prepared in N-methylpyrrolidinone (BTDA-ODA, BTDA-MPDA and BTDA with a 1 1 molar ratio of MPDA and ODA) or dimethyl acetamide (BPDA-PDA and PMDA-ODA). 

BTDA 3 3 4 4 Benzophenone tetracarboxylic dianhydride The purification steps are described in the following section. 

CBZ-PMDA), carbazole-1,4,5,8-naphthalene tetracar-boxylic dianhydride (CBZ-NTDA) and carbazole-benzophenone tetracarboxyl dianhydride (CBZ-BTDA) were synthesized by a similar method. Poly(N-vinyl-carbazole)-anhydride co-polycondensates such as PNVC-PhAn, PNVC-TMA, PNVC-PMDA, PNVC-NTDA and PNVC-BTDA were also prepared. Thermal stability characteristics of the various polycondensates have been compared in Table 16.18 and it was observed that (i) the initial decomposition temperature and the overall stability of a co-polycondensate of either CBZ or PNVC depends upon the anhydride moiety in the order of NDTA > BTDA > PMDA >TMA > PhAn (ii) initial decomposition temperature and the overall stability of a co-polycondensate with a fixed anhydride, vary in the order PNVC > CBZ and (iii) polycondensation of PNVC by anhydrides improves the thermal stability of the base polymer. It is suggested that the incorporation of thermally stable moieties, cross-links and rigidity is the main reason for enhanced initial decomposition temperature as well as overall thermal stability of these co-polycondensates. Table 16.19 gives the isothermal degradation stability of pairs of polycondensates and data confirm the high thermal stability... 

The incorporation of pyridine or triazole improves the adhesion between poly(imide)s and copper.Poly(3,3, 4,4 -benzophenone tetracarboxylic dianhydride-3,5-diamino-l,2,4-triazole) (BTDA-DATA) contains the triazole moiety as repeating units. Poly(4,4 -oxydiphthalic anhydride-1,3-aminophenoxybenzene-8-azaadenine) (ODPA-APB-8-AA) bears the triazole moieties at the end." BTDA-DATA starts to decompose at 350°C. However, ODPA-APB-8-AA starts to decompose at 400°C. The polymers have been tested as adhesives for copper surfaces. The adhesion is increased by the formation of copper complexes. 

CAS 2421-28-5 EINECS/ELINCS 219-348-1 Synonyms Benzophenone tetracarboxylate dianhydride 3,3, 4,4 -Ben-zophenonetetracarboxylate dianhydride Benzophenone-3,3 -4,4 -tetracarboxylic dianhydride BTDA 5,5-Carbonylbis 1,3-isobenzo-furandione 4,4-Carbonylbis (phthalic anhydride) 4,4 -Carbonyldi-phthalic acid anhydride 4,4 -Carbonyldiphthalic anhydride Classification Aromatic carboxylic anhydride Empirical CnHsO,... 

Benzophenonetetracarboxylate dianhydride Benzophenone-3,3 -4,4 -tetracarboxylic dianhydride BTDA 5,5 -Carbonylbis 1,3-isobenzofurandione... 

Benzophenone tetracarboxylic dianhydride BTDA 2425-54-9 Barchlor 14 Barchlor 14S 1 -Chlorotetradecane 2425-66-3... 

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