C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
6/220, 117/55, 2
C03C 17/28 (2006.01) C03C 17/25 (2006.01) C07F 7/22 (2006.01)
Patent
CA 1223271
GLASS CONTAINER HOT END COATING FORMULATION ABSTRACT OF THE INVENTION The invention relates to a stabilized composition for coating glass containers, and to its method of use. The method involves the steps of heating the surface of a glass container to at least 800°F, and spraying the surface of the glass with a glass coating formulation comprising mono- alkyltin trihalide and about .5 to 10 parts by weight per hundred parts monoalkyltin trihalide of a solubilizing material. The solubilizing material can be a solvent such as monohydric alcohols, represented by the formula ROH, where R is a C1-C8 straight or branched chain group and dihydric alcohols represented by the formula, HO-(CH2)m-OH, where m = 2 to 6. Other materials include glycol ethers represented by the formula R1(OCH2CH2)nOH, where R1 is a C1C8 group and n = 1 or 2 esters represented by the formula R2O2CR3, where R2 is a C1C8 straight or branched chain group, R4(OCH2CH2)s where R4 is a C1-C4 group, s = 1 or 2 branched chain group, R (OCH2CM2)s where R4 is a C1-C4 group, s = 1 or 2, and R3 is a C1C4 group or -CH2OH. Another class of materials is ketones having the formula R5COR6, where R5 and R6 are C1-C6 straight, branched chain or cyclic groups. Other class of materials are ethers represented by the formula R7(OCH2CH2)OR8 where R7 and R8 are C1-C4 groups or -(CH2)p- where p = 4 or 5, or -CH2CH2OCH2CH2-, and r = 0 - 4 and aldehydes repre- sented by the formula R9COH, where R9 is C1-C3. Further class are anhydrides represented by the formula -2- R10CO2COR11 where R10 and R11 are a C1-C3 group and formamides represented by the formula R12 R13NCOH where R12 and R13 are a C1-C4 group, as well as acetals represented by the formula R14(CH2)qCH(OR15)2, where R14 is H, OH, (CH3)2N, or (C2H5)2N, q = 0 or 1, and R15 is a C1-C2 group or a nitrile, R16CN where R16 is a C1-C3 group. Mixtures of the various materials can be used. In every case the combination of the dopant and the glass coating material must have a flash point of at least 60°C. Among the preferred materials are the monohydric alcohols methanol, ethanol, propanol and isopropanol and mixtures thereof.
454098
Atofina Chemicals Inc.
Fetherstonhaugh & Co.
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