CALIXARENE DERIVATIVES AND USE OF SUCH COMPOUNDS AS ACCELERATORS IN INSTANT ADHESIVE COMPOSITIONS

Abstract: Novel Calixarene derivatives useful as accelerators in cyanoacrylate adhesive compositions are represented by the formula wherein m + n = 4 ,6 or 8 n = an integer greater than or equal to ½ (m+n) R⁹ is aryl, hydrocarbylaryl, aryloxy, hydrocarbylaryloxy, substituted aryl, substituted hydrocarbylaryl, substituted aryloxy or substituted hydrocarbylaryloxy; or when R¹⁰ is aryl, hydrocarbylaryl, substituted aryl or substituted hydrocarbylaryl, R⁹ is hydrocarbyl, hydrocarbyloxy, substituted hydrocarbyl or substituted hydrocarybyloxy; R¹⁰ is H, hydrocarbyl, aryl, hydrocarbylaryl, substituted hydrocarbyl, substituted aryl or substituted hydrocarbylaryl; R¹¹ is H, hydrocarbyl or substituted hydrocarbyl; provided that neither R⁹ or R¹¹ is substituted with a basic N-containing group.

Description: This invention relates to novel calixarene derivatives and to cyanoacrylate adhesive compositions which contain such calixarene derivatives as accelerators. U.S. Patent 4,556,700 Harris et al describes the use in cyanoacrylate adhesive compositions of calixarene compounds represented by the formula where R¹ is alkyl, alkoxy, substituted alkyl or substituted alkoxy, R² is H or alkyl and x=4,6 or 8. European Patent Application No. 0196895 A2 describes the use in cyanoacrylate adhesive compositions of calixarene compounds represented by the formula where R³ is H, -CH₂COOH, -CH₂COOR⁶, -COR⁸, hydrocarbyl or trihydrocarbylsilyl or the two R³ groups together form a divalent hydrocarbyl or oxygen interrupted hydrocarbyl group; R⁴ is H or hydrocarbyl; R⁵ is hydrocarbyl, hydrocarbyl interrupted by one or more oxygen atoms or hydrocarbyl substituted with halo, oxo or nitro groups; R⁶ is as defined for R⁵ but is a different group therefrom; and R⁸ is as defined for R⁵ but may be the same or different therefrom. Another class of calixarene compounds which has now been discovered to be highly useful in cyanoacrylate adhesive compositions are novel calixarene derivatives represented by the formula wherein m + n = 4, 6 or 8 n = an integer greater than or equal to ½ (m+n) R⁹ is aryl, hydrocarbylaryl, aryloxy, hydrocarbylaryloxy, substituted aryl, substituted hydrocarbylaryl, substituted aryloxy or substituted hydrocarbylaryloxy; or when R¹⁰ is aryl, hydrocarbylaryl, substituted aryl or substituted hydrocarbylaryl, R⁹ is hydrocarbyl, hydrocarbyloxy, substituted hydrocarbyl or substituted hydrocarbyloxy; R¹⁰ is H, hydrocarbyl, aryl, hydrocarbylaryl, substituted hydrocarbyl, substituted aryl or substituted hydrocarbylaryl; R¹¹ is H, hydrocarbyl or substituted hydrocarbyl; provided that neither R⁹ or R¹¹ is substituted with a basic N-containing group. When m and n are greater than 1, the m aryl groups having the -OR¹¹ side chain may be interspersed around the ring between the n aryl groups having the -OCH₂C(O)R⁹ side chain. In the above formula, hydrocarbyl is suitably alkyl or alkenyl; alkyl or alkenyl preferably has 1-10 carbon atoms, more particularly 1-5 carbon atoms. If R⁹, R¹⁰ or R¹¹ is substituted, it may suitably be substituted with one or more halo or oxo groups. The present invention provides new cyanoacrylate compositions for bonding wood and other de-activating surfaces such as paper, leather, ceramics, plastics and metals with chromate treated or acidic oxide surfaces. The inventive compositions are standard cyanoacrylate adhesive formulations to which have been added, as accelerators, calixarene compounds as defined above which are stable to cyanoacrylate monomers. The calixarene compounds are employed in amounts conventional for cyanoacrylate accelerators, preferably at levels between about 0.1% and 2% by weight of the composition. The standard alpha-cyanoacrylate compositions are as described as U.S. Patent 4 556 700 Harris et al at column 2 line 18 - column 3 line 32, the contents of which are incorporated herein by reference. Calixarene compounds may be readily synthesised by methods described in C. Gutsche, Acc. Chem. Res., 16 , 161-170 (1983) and references cited therein; U.S. Patent 4 556 700 Harris et al ; and in Journal of Inclusion Phenomena 2 199-206 (1984) D Reidel Publishing Company; the appropriate disclosures of all of which are incorporated herein by reference. The invention may be further understood with reference to the following non-limiting examples. EXAMPLE 1 To 2.48g of the tetraethylacetate of p - t -butylcalix-4-arene (0.0025 mole) (prepared as in Example 8 of U.S. Patent 4556 700 Harris et al) was added 5.4g (0.050 mole) benzyl alcohol and 40 mg p-toluene sulphonic acid transesterification catalyst and the entire was stirred under nitrogen at 120-130° for 48 hours. The reaction mixture was then allowed to cool and the excess benzyl alcohol distilled off under vacuum to give 3.0g of a clear buff colored solid which was taken up in dichloromethane, washed well twice with water, then dried over magnesium sulphate to give after removal of volatiles 2.9g off-white solid m.pt. 67-8°C characterised by i.r. spectroscopy and elemental analysis as the compound of formula IV above i.r. Spectroscopy results: ν 1750(S)cm⁻¹C=0 Elemental Analysis results = (Calc'd for C₈₀ H₈₈ O₁₂, C:77.39, H:7.14, O:15.47; Found, C:77.38, H:7.43, O:15.08) Preparation of Tetramer Starting Materials A & B 34.0g tetraethylacetate of p - t -butyl calix-4-arene (0.034 mole) (prepared as in US Patent 4 556 700 Harris et al) was refluxed for 72 hours with 76.0g KOH (1.35 mole), 70 mls IMS and 70 mls water. The reaction mixture was then added to 200 mls 35% aqueous HCl and the white solid was filtered and washed several times with water to remove acid and then dried to give 26.0g of product characterised by i.r. spectroscopy as the acid derivative of formula A above. To 4.4g (0.005 mole) of the acid derivative of formula A prepared above in 91 mls dry dichloromethane was added 21.6g oxalyl chloride with stirring under nitrogen at room temperature dropwise during 30 minutes. After several hours the white suspension had completely dissolved giving a clear pale yellow liquid which was left stirring at room temperature overnight. After removal of volatiles 4.77g colourless solid was left idenfified by i.r. spectroscopy as the acid chloride of formula B above which was not further purified in view of its moisture sensitivity. EXAMPLE 2 To 3.08g (0.0032 mole) of the acid chloride starting material of formula B in 20mls NaH dried THF (tetrahydrofuran) at 0°C was added dropwise 2.04g (0.026 mole) dry pyridine and 2.45g (0.026 mole) phenol under nitrogen with stirring during 15 minutes. A white precipitate formed and the stirred reaction mixture was allowed to warm to room temperature and left stirring 72 hours. The reaction mixture was then poured into 100mls ice water and then extracted with dichloromethane which was washed well twice with water and then dried over magnesium sulphate to give after removal of volatiles 3.0g crude white solid product. Recrystallisation from IMS gave 2.6g colourless crystalline product m.pt. 154-5°C characterised by i.r. spectroscopy and elemental analysis as the compound of formula V above. i.r. Spectroscopy results: ν 1765(s)cm⁻¹ C=0, 1583(m)cm⁻¹ C ... C Elemental Analysis results = (Calc'd for C₇₆ H₈₀ O₁₂, C:77.00, H:6.80, O:16.20; Found, C:76.44, H:7.00, O:15.75) EXAMPLE 3 A mixture of 9.72g (0.015 mole) p - t -butylcalix-4-arene 18.6g (0.120 mole) phenacyl chloride, 9.96 (0.060 mole) anhydrous potassium iodide, 12.42g (0.090 mole) anhydrous potassium carbonate and 600 mls analar acetone was refluxed under dry nitrogen with stirring for 68 hours. After this time the cooled reaction mixture was poured into 1 litre ice water and the orange-coloured solid filtered off, washed with 5% aqueous hydrochloric acid, followed by water then dried over P₂O₅ in a dessicator to give 12.1g crude orange solid product. This product was chromatographed on neutral alumina using 50:50 dichloromethane, 40-60°C petroleum ether as eluent to give after removal of solvent off-white solid product m.pt. 141-8° characterised by i.r. spectroscopy, HPLC (High pressure liquid chromatography) and elemental analysis as the compound of formula VI above mixed with 20% dietherified product of formula VII above. i.r. spectroscopy results:ν 1680(s)cm⁻¹ C=0 HPLC Analysis results = Employing Waters Associates Model 440 and micro Bondapak C18 reverse phase column. U.V.detector Pye Unicam PU4020 set at λ m 280nm 1.5mls/minute (10%water, 90%THF) (Isocratic) = 3.13 minutes elution volume - main product of formula VI, 2.27 minutes elution volume - 20% secondary product of formula VII Elemental analysis results = (Calc'd for C₇₆ H₈₀ O₈, C:81.39, H:7.19, O:11.41; Found C:82.21, H:6.59, O:10.72) [ Calc'd for the compound of formula VII, C₆₀H₆₈O₆ C:81.41, H:7.74, O:10.85] EXAMPLE 4 To 0.566g (0.00078 mole) p -phenylcalix-4-arene (obtained from Parish Chemicals USA) was added 1.04g (0.0062 mole) ethyl bromoacetate and 0.64g (0.0047 mole) anhydrous potassium carbonate and 5mls dry analar acetone and the mixture was refluxed together under nitrogen for 7 days after which the cooled reaction mixture was poured into 50mls 5% aqueous HCl and an off-white coloured solid precipitated. This solid was filtered off and washed with water to give 0.83g crude product which after air-drying was chromatographed on neutral alumina using dichloromethane as eluent. After removal of solvent a colourless solid was obtained m.pt. 53-4°C characterised by i.r. spectroscopy and elemental analysis as the compound of formula VIII above. I.R. spectroscopy results : ν 1745(s)cm⁻¹ C=0 Elemental analysis results = (Calc'd for C₆₈ H₆₄ O₁₂, C:76.10, H:6.00, Found, C:75.66, H:6.16) EXAMPLE 5 Ethyl cyanoacrylate stabilised with 10 parts per million BF₃ was used as a base adhesive formulation. The calixarene compounds listed in table I below were dissolved in the base adhesive at the indicated levels, and fixture times on copy paper and on white deal were determined. The results shown below demonstrate the very good accelerative activity for these Calixarenes:

Claims: 1. Novel calixarene derivatives represented by the formula wherein m + n = 4, 6 or 8 n = an integer greater than or equal to ½ (m+n) R⁹ is aryl, hydrocarbylaryl, aryloxy, hydrocarbylaryloxy, substituted aryl, substituted hydrocarbylaryl, substituted aryloxy or substituted hydrocarbylaryloxy; or when R¹⁰ is aryl, hydrocarbylaryl, substituted aryl or substituted hydrocarbylaryl, R⁹ is hydrocarbyl, hydrocarbyloxy, substituted hydrocarbyl or substituted hydrocarbyloxy; R¹⁰ is H, hydrocarbyl, aryl, hydrocarbylaryl, substituted hydrocarbyl, substituted aryl or substituted hydrocarbylaryl; R¹¹ is H, hydrocarbyl or substituted hydrocarbyl; provided that neither R⁹ or R¹¹ is substituted with a basic N-containing group. 2. Calixarene derivatives according to claim 1 wherein hydrocarbyl is alkyl or alkenyl having 1-10 carbon atoms. 3. Calixarene derivatives according to claim 2 wherein hydrocarbyl is alkyl or alkenyl having 1-5 carbon atoms. 4. Calixarene derivatives according to claim 1 wherein m = 0, n = 4, R⁹ is aryl, aryloxy or alkaryloxy and R¹⁰ is alkyl. 5. Calixarene derivatives according to claim 1 wherein m = 0, n = 4, R⁹ is aryl, and R¹⁰ is aryl.

Inventors: HARRIS, STEPHEN J.
Applicants: LOCTITE (IRELAND) LTD.
Application year: 1987
Main classification: C07C69
IPC codes: C07C59, C09J4, C09J11, C07C69, C07C67, C07C45, C07C49, C07C51