Polyester resin for aluminum coil ceiling board and preparation method thereof

Abstract

The invention discloses polyester resin for an aluminum coil ceiling board and a preparation method thereof. The polyester resin is prepared from dimethyl terephthalate, methylpropanediol, neopentyl glycol, hexanedioic acid, isophthalic acid, tetrabutyl titanate, triphenyl phosphite, xylene, S150 arene and n-butyl acetate. The polyester resin for the aluminum coil ceiling board prepared by a novelingredient system provided by the invention passes the performance detection; the hardness and the weather resistance performance of the polyester resin prepared by the method are identical to thoseof polyester resin in the prior art; the processing performance is better than that of the polyester in the prior art; the cost is lower than that in the prior art; the popularization and the use areeasy; good technical effects are obtained.

Description

technical field

[0001] The invention relates to a resin, in particular to a polyester resin for rolled aluminum ceilings with strong environmental protection, low cost, superior performance and easy popularization and application, and a preparation method thereof, belonging to the technical field of polymer materials. Background technique

[0002] The topcoat for coiled aluminum ceilings is usually a baking varnish system combined with highly flexible saturated polyester resin and methylated amino resin, which requires the paint film to have good hardness, flexibility and processability. Generally, saturated polyester is used for ceiling paints by using isobenzene, adipic acid, diols without β hydrogen atoms, etc. It has been proved that this polyester topcoat formula has good retort resistance, hardness, and processability. It is a classic saturated polyester resin for coil aluminum topcoat. However, in the resin formula, about 32 to 40% of the formula is used for m-benzen...

Examples

Embodiment 1

[0029] 1. A saturated polyester resin for aluminum ceiling paint, which is made of the following raw materials in percentage by weight: 5% neopentyl glycol, 20% methylpropanediol, 15% adipic acid, 5% methanediol Phthalic acid, 25% dimethyl terephthalate, 0.05% n-butyl titanate, 3% xylene, 30% S150, 7% butyl acetate.

[0030] 2, the preparation method of saturated polyester resin for coil aluminum topcoat, it comprises the following steps:

[0031] (1) Put 5% neopentyl glycol, 20% methylpropanediol, 25% dimethyl terephthalate, and 0.05% n-butyl titanate into the reaction kettle by weight percentage, and stir to make the materials mix uniformly;

[0032] (2) Then feed nitrogen, remove the oxygen in the reactor, and start to heat up; heat up to 240°C, keep warm for 0.5 hours, (in the process of heating up, the distillation temperature is controlled at no higher than 68°C), cool down to 160°C and wait use.

[0033] (3) Then add 15% adipic acid and 5% isophthalic acid according t...

Embodiment 2

[0041] 1. A saturated polyester resin for aluminum ceiling paint, which is made of the following raw materials in percentage by weight:

[0042] Dimethyl Terephthalate 30%, Methyl Propylene Glycol 25%, Neopentyl Glycol 10%, Adipic Acid 20%, Isophthalic Acid 10%, n-Butyl Titanate 0.05%, Xylene 3%, S150 Aromatics 35%, butyl acetate 10%.

[0043] 2, the preparation method of saturated polyester resin for coil aluminum topcoat, it comprises the following steps:

[0044] (1) Put 10% neopentyl glycol, 25% methylpropanediol, 30% dimethyl terephthalate, and 0.05% n-butyl titanate into the reaction kettle by weight percentage, and stir to make the materials mix uniformly;

[0045] (2) Then feed nitrogen, remove the oxygen in the reactor, and start to heat up; heat up to 240°C, keep warm for 0.5 hours, (in the process of heating up, the distillation temperature is controlled at no higher than 68°C), cool down to 160°C and wait use.

[0046] (3) Then add 20% adipic acid and 10% isopht...

Embodiment 4

[0058] Embodiment 4 performance test

[0059]

[0060]

[0061] The above performance testing results show that the present invention screens through a large number of experiments, and adopts the saturated polyester resin for coiled aluminum ceiling paint prepared by the preferred raw material. Its hardness, processability and polyester resin of the prior art are equivalent, but the weather resistance is lower There are now technically saturated polyesters which are superior. Moreover, the cost is lower than that of the prior art, the environmental protection is better, and a very good technical effect has been achieved.

technical field

[0001] The invention relates to a resin, in particular to a polyester resin for rolled aluminum ceilings with strong environmental protection, low cost, superior performance and easy popularization and application, and a preparation method thereof, belonging to the technical field of polymer materials. Background technique

[0002] The topcoat for coiled aluminum ceilings is usually a baking varnish system combined with highly flexible saturated polyester resin and methylated amino resin, which requires the paint film to have good hardness, flexibility and processability. Generally, saturated polyester is used for ceiling paints by using isobenzene, adipic acid, diols without β hydrogen atoms, etc. It has been proved that this polyester topcoat formula has good retort resistance, hardness, and processability. It is a classic saturated polyester resin for coil aluminum topcoat. However, in the resin formula, about 32 to 40% of the formula is used for m-benzen...

Examples

Embodiment 1

[0029] 1. A saturated polyester resin for aluminum ceiling paint, which is made of the following raw materials in percentage by weight: 5% neopentyl glycol, 20% methylpropanediol, 15% adipic acid, 5% methanediol Phthalic acid, 25% dimethyl terephthalate, 0.05% n-butyl titanate, 3% xylene, 30% S150, 7% butyl acetate.

[0030] 2, the preparation method of saturated polyester resin for coil aluminum topcoat, it comprises the following steps:

[0031] (1) Put 5% neopentyl glycol, 20% methylpropanediol, 25% dimethyl terephthalate, and 0.05% n-butyl titanate into the reaction kettle by weight percentage, and stir to make the materials mix uniformly;

[0032] (2) Then feed nitrogen, remove the oxygen in the reactor, and start to heat up; heat up to 240°C, keep warm for 0.5 hours, (in the process of heating up, the distillation temperature is controlled at no higher than 68°C), cool down to 160°C and wait use.

[0033] (3) Then add 15% adipic acid and 5% isophthalic acid according t...

Embodiment 2

[0041] 1. A saturated polyester resin for aluminum ceiling paint, which is made of the following raw materials in percentage by weight:

[0042] Dimethyl Terephthalate 30%, Methyl Propylene Glycol 25%, Neopentyl Glycol 10%, Adipic Acid 20%, Isophthalic Acid 10%, n-Butyl Titanate 0.05%, Xylene 3%, S150 Aromatics 35%, butyl acetate 10%.

[0043] 2, the preparation method of saturated polyester resin for coil aluminum topcoat, it comprises the following steps:

[0044] (1) Put 10% neopentyl glycol, 25% methylpropanediol, 30% dimethyl terephthalate, and 0.05% n-butyl titanate into the reaction kettle by weight percentage, and stir to make the materials mix uniformly;

[0045] (2) Then feed nitrogen, remove the oxygen in the reactor, and start to heat up; heat up to 240°C, keep warm for 0.5 hours, (in the process of heating up, the distillation temperature is controlled at no higher than 68°C), cool down to 160°C and wait use.

[0046] (3) Then add 20% adipic acid and 10% isopht...

Embodiment 4

[0058] Embodiment 4 performance test

[0059]

[0060]

[0061] The above performance testing results show that the present invention screens through a large number of experiments, and adopts the saturated polyester resin for coiled aluminum ceiling paint prepared by the preferred raw material. Its hardness, processability and polyester resin of the prior art are equivalent, but the weather resistance is lower There are now technically saturated polyesters which are superior. Moreover, the cost is lower than that of the prior art, the environmental protection is better, and a very good technical effect has been achieved.

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