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Quick-drying alkyd resin for double-component polyurethane primer

A two-component polyurethane and alkyd resin technology, applied in the resin field, can solve problems such as poor hardness and poor sandability, and achieve the effects of sufficient crosslinking, good sandability, and good transparency

Active Publication Date: 2013-10-30
SKSHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because ordinary alkyd resins use a large number of pentaerythritol and ethylene glycol or diethylene glycol, with little or no branched alcohols, and pentaerythritol, ethylene glycol or diethylene glycol have poor compatibility with xylene, if the final resin is to be Good compatibility with xylene, the formula must contain more vegetable oleic acid, but the higher the content of vegetable oleic acid in the formula, the smaller the molecular weight of the final alkyd resin will be, which will cause the alkyd resin used in polyurethane coatings to dry. Poor, poor hardness, poor grinding

Method used

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  • Quick-drying alkyd resin for double-component polyurethane primer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The quick-drying alkyd resin for two-component polyurethane primer of the present invention, its raw material and mass proportioning are:

[0039] Raw material ratio%

[0040] monoacid 8

[0041] Semi-dry vegetable oleic acid 9

[0042] Maleic anhydride 0.5

[0043] Phthalic anhydride 28

[0044] Benzoic acid 4

[0045] Pentaerythritol 12.45

[0046] Trimethylolpropane 2

[0047] Diethylene glycol 6

[0048] Antioxidant color reducer 0.05

[0049] Xylene 25

[0050] Toluene 5.

[0051] Its preparation steps are:

[0052] 1. Add monoacid, semi-dry vegetable oleic acid and diethylene glycol to the reaction kettle in sequence, and stir evenly;

[0053] 2. Then add maleic anhydride, phthalic anhydride, benzoic acid, pentaerythritol, trimethylolpropane and anti-oxidant color reducer, toluene and xylene in sequence, and then heat up to 160- React at 170°C for 1-2 hours, then raise the temperature to 210°C for esterification reaction at a rate of 10-12°C / hour, and ...

Embodiment 2

[0056] The quick-drying alkyd resin for two-component polyurethane primer of the present invention, its raw material and mass proportioning are:

[0057] Raw material ratio%

[0058] Monoacid 8.5

[0059] Semi-dry vegetable oleic acid 11

[0060] Maleic anhydride 0.93

[0061]Phthalic anhydride 22.5

[0062] Benzoic acid 4.5

[0063] Pentaerythritol 15

[0064] Trimethylolpropane 2.5

[0065] Diethylene glycol 6.5

[0066] Antioxidant color reducer 0.07

[0067] Xylene 20.5

[0068] Toluene 8.

[0069] Its preparation steps are identical with above-mentioned embodiment one.

Embodiment 3

[0071] The quick-drying alkyd resin for two-component polyurethane primer of the present invention, its raw material and mass proportioning are:

[0072] Raw material ratio%

[0073] monoacid 10

[0074] Semi-dry vegetable oleic acid 9.92

[0075] Maleic anhydride 1

[0076] Phthalic anhydride 22

[0077] Benzoic acid 6

[0078] Pentaerythritol 11

[0079] Trimethylolpropane 5

[0080] Diethylene glycol 9

[0081] Antioxidant color reducer 0.08

[0082] Xylene 20

[0083] Toluene 6.

[0084] Its preparation steps are also the same as the above-mentioned embodiment one.

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Abstract

The invention discloses a quick-drying alkyd resin for a double-component polyurethane primer for a wooden ware compatible with a polyurethane curing agent. The quick-drying alkyd resin comprises the following raw materials in parts by weight: 8-10 parts of monoacid, 9-11 parts of semidry vegetable oil acid, 0.5-1 part of maleic anhydride, 22-28 parts of phthalic anhydride, 4-6 parts of benzoic acid, 11-15 parts of pentaerythritol, 2-5 parts of trimethylolpropane, 6-9 parts of diglycol, 20-25 parts of dimethyl benzene and 5-8 parts of toluene. The quick-drying alkyd resin for the double-component polyurethane primer for the wooden ware has the characteristics of high drying speed, superior transparency, excellent rubbing property, high cost performance and the like, and also has high intermiscibility with the dimethyl benzene.

Description

technical field [0001] The invention relates to a resin, in particular to a quick-drying alkyd resin for wood two-component polyurethane primer compatible with a polyurethane curing agent. Background technique [0002] Alkyd resin is a very important type of synthetic resin for coatings. Due to its easy availability of raw materials, diversified products, commensurate performance and price, and convenient construction, it has developed very fast since its appearance in 1927, accounting for about all synthetic resins for coatings abroad. In my country, alkyd resin is still the main synthetic resin for coatings, and its output has leapt to the top of all kinds of coatings since 1983, and it still maintains its leading position. An important application of alkyd resin is to use its hydroxyl-OH and isocyanate-NCO to form polyurethane resin, which is widely used in coatings. Among them, the structure of alkyd resin has a great influence on the performance of polyurethane coatings ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/676C09D175/06C09D175/14
Inventor 关强
Owner SKSHU PAINT
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