SU827508A1 - Composition for coatings - Google Patents

Description

four

Oligoether glycol is a tetrahydrofuran copolymer with propylene oxide with a molecular weight of 900 and 30.0% OH.

Oligophenylglycoxysiloxane is the product of transesterification of industrial polyphenylethoxysiloxane with diethylene glycol and is an oligomer of the general formula

C.HsSiOs-. (HOS, CH, HCH, CH, OH),

2

where x, Q and, with a molecular weight of 800 and a hydroxyl content of 15 groups of 11.7%.

The ratio of hydroxyl-containing compounds and their polyisocyanate is 1.25-1.5, the ratio in the copolymer of tetrahydrofuran and propylene oxide is 1.2: 1-10: 1.

Example. 1. 24.5 oligoetherglycol 7.0 oligophenyl diethyleneglycoxy siloxin, 38.7 adduct TDI-TMP and 20 May. including mixtures of solvents (ethyl acetate 6, butyl acetate 6, cyclohexanone 4, toluene 4) is stirred until a homogeneous mass. The composition is applied to the substrate-glass, aluminum, tinplate, steel. After curing at room temperature for 2 days, a glossy, smooth coating is obtained.

Example 2. 36.8 oligoether glycol, 3.5 oligophenyl diethylene glycoxy-siloxane, 45 TDI-TMP adduct and 25 May. Part of the solvent mixture (ethyl acetate 7.5, butyl acetate 7.5, cyclohexanone 5, toluene 5) is stirred until a homogeneous mass, applied to the substrate and cured at room temperature for 2 days, to obtain coatings without defects and inhomogeneities.

Example 3. 12,5-oligoether glycol, 10.5 oligophenyl diethylene glycoxy-siloxane, 45 adduct TDI-TMP and 20 May. Part of the solvent (ethyl acetate 6, butyl acetate 6, cyclohexanone 4, toluene 4) is stirred until a homogeneous mass and applied to the substrate. It is cured at room temperature for 30 hours, smooth, glossy coatings are obtained.

The table presents the physical and mechanical properties of coatings.

The data show that the use of the proposed composition for coatings provides in comparison with the known following advantages: it provides for the displacement of the initial oligomers and the curing of the coatings at room temperature, which eliminates the energy consumption of production and ensures the manufacturability of this composition; allows to obtain coatings with high physicomechanical indicators.

formula of invention

Coating composition comprising 65 Oligoether glycol, organosilicon

yolol, an adduct of toluilium zyzanate with trimethylolpropane, a solvent, characterized in that, in order to cure the composition at room temperature, intended for operation in the temperature range from +60 to -70 ° C, to increase the tensile strength, relative elongation of the coatings, it is as the organosilicon polyol, it contains oligophenylglycoxysiloxane of molecular weight 800 and with a hydroxyl content of 11.7%, and the solvent contains a mixture of ethyl acetate, butyl acetate, cyclohexanone and toluene in a ratio of 3: 3: 2: 2 at

i eat the ratio of the component; May including:

Oligoetherglycol 12,5-36,8

Oligophenylglycoxysiloxane3, 5-10,5 Adduct of toluene diisocyanate with trimethylolpropium 38.7-45.0 Solvent 20.0-25.0

Sources of information taken into account in the examination

1. USSR Author's Certificate No. 252606, cl. From 09D 3/72, 1972.

2. USSR author's certificate No. 328129, cl. C 080 22/16, 1974 (prototype).

Claims (1)

Claim Composition for coatings comprising 65 oligoester glycol, organosilicon lithium, adduct of toluene NDI isocyanate with trimethylolpropane, a solvent, characterized in that, in order to cure the composition at room temperature, intended for use in the temperature range from +60 to -70 ° C, to increase tensile strength , relative elongation of coatings, it as an organosilicon polyol contains oligophenylglyoxoxysiloxane of molecular weight 800 and with a hydroxyl content of 11.7%, and the solvent is a mixture ethyl acetate, butyl acetate, cyclohexanone and toluene in a ratio of 3: 3: 2: 2 in the following ratio in May. hours: Oligoether glycol Oligophenylglyoxoxysiloxane Toluene diisocyanate adduct with trimethylolpropane Solvent