Polyurethane unsaturated polyester resin and photocuring coating containing same

A polyester resin, unsaturated technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of not being used alone, slow curing speed, poor activity, etc., achieving low cost, fast curing speed, and large shrinkage stress Effect

Active Publication Date: 2014-06-04
广东百汇达新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the curing speed is slow and the hardness is poor
Therefore, PEA should not be used alone due to its poor activity, slow curing speed and poor hardness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Synthesis of hydroxyl-terminated unsaturated resin:

[0024] Add 312g of propylene glycol, 150g of diethylene glycol, 150g of methylpropanediol, 450g of phthalic anhydride, and 300g of maleic anhydride into the reactor, react at 180°C until the acid value is less than 10, then add 0.2g of polymerization inhibitor terephthalate Phenol, lower the temperature below 100°C and add 836g of styrene to obtain a hydroxyl-terminated unsaturated resin.

[0025] 2. Synthesis of polyurethane unsaturated polyester resin:

[0026] Add 100g of TDI (toluene diisocyanate) monomer dropwise to 1500g of hydroxyl-terminated unsaturated resin at 60~80℃, and add it in about 1 hour. After the addition, keep it warm for 3 hours until it reaches 2273cm by infrared spectroscopy. -1 The absorption peak disappeared completely. Cool down to below 50°C and discharge.

[0027] 3. Preparation of light-curing coating:

[0028] Add 1.5kg184 photoinitiator and 1.5kg1173 photoinitiator (CIBA, Ciba S...

Embodiment 2

[0030] 1. Synthesis of hydroxyl-terminated unsaturated resin:

[0031] Add 70g of ethylene glycol, 440g of dipropylene glycol, 120g of methylpropylene glycol, 360g of phthalic anhydride, and 240g of maleic anhydride into the reactor, react at 200°C until the acid value is less than 10, then add 0.2g of polymerization inhibitor terephthalate Phenol, lower the temperature below 100°C and add 763g of methyl styrene to obtain a hydroxyl-terminated unsaturated resin.

[0032] 2. Synthesis of polyurethane unsaturated polyester resin:

[0033] Add 70g of HDI monomer dropwise into 1500g of hydroxyl-terminated unsaturated resin at 60~80℃, and add it in about 1 hour. After the addition, keep it warm for 3 hours until it reaches 2273cm by infrared spectroscopy. -1 The absorption peak disappeared completely. Cool down to below 50°C and discharge.

[0034] 3. Preparation of light-curing coating:

[0035] Add 1.0kg184 photoinitiator and 1.0kg1173 photoinitiator (CIBA, Ciba Specialty Ch...

Embodiment 3

[0037] 1. Synthesis of hydroxyl-terminated unsaturated resin:

[0038] Add 125g of neopentyl glycol, 493g of dipropylene glycol, 144g of butanediol, 360g of phthalic anhydride, and 282g of fumaric acid into the reaction kettle, react at 190°C until the acid value is less than 10, then cool down and add 0.2g of polymerization inhibitor Add hydroquinone as an agent, lower the temperature to below 100°C and add 686g of styrene to obtain a hydroxyl-terminated unsaturated resin.

[0039] 2. Synthesis of polyurethane unsaturated polyester resin:

[0040] Add 203g of IPDI monomer dropwise into 1500g of hydroxyl-terminated unsaturated resin at 60~80℃, and the addition is completed in about 1 hour. After the addition, keep it warm for 3 hours until it reaches 2273cm by infrared spectroscopy. -1 The absorption peak disappeared completely. Cool down to below 50°C and discharge.

[0041] 3. Preparation of light-curing coating:

[0042] Add 2.5kg184 photoinitiator and 2.5kg1173 photoi...

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PUM

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Abstract

The invention provides a polyurethane unsaturated polyester resin which is prepared by the following steps: (1) synthesis of hydroxyl-terminated unsaturated resin: reacting saturated dibasic acid or acid anhydride, unsaturated dibasic acid or acid anhydride and polybasic alcohol at 180-200 DEG C until the acid value is lower than 10, cooling, adding a polymerization inhibitor, and adding a reactive diluent for dilution at the temperature of lower than 100 DEG C to obtain the hydroxyl-terminated unsaturated resin; and (2) cooling the hydroxyl-terminated unsaturated resin to 60-80 DEG C, adding a polyisocyanate monomer, reacting at the temperature for 3 hours, detecting with an infrared spectrum until the 2273cm<-1> absorption peak completely disappears, cooling to lower than 50 DEG C, and discharging. Compared with the prior art, the flexibility and adhesive force of the unsaturated polyurethane photocuring resin are obviously better than those of UPR (unsaturated polyester resin), and the unsaturated polyurethane photocuring resin has similar comprehensive properties to PUV (polyurethane acrylate), but is much cheaper than PUV; and thus, the unsaturated polyurethane photocuring resin has excellent cost performance. The photocuring coating provided by the invention has the advantages of high adhesive force, favorable flexibility, low embrittlement tendency, low cost and obvious economic benefit.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a polyurethane type unsaturated polyester resin and a photocurable coating containing the resin. Background technique [0002] Ultraviolet curable coatings (UVCC) have been widely used and developed since they were developed in the 1960s. With the in-depth research on UVCC and the continuous development of new products, UVCC is expanding to various fields of traditional coating applications. Especially in the face of severe labor shortage, electricity shortage, and more stringent pressure on energy conservation and emission reduction, it is more important to develop environmentally friendly and efficient UVCC. [0003] Photocurable resins currently on the market are mainly divided into unsaturated polyester resin type, epoxy acrylic type, polyurethane acrylic type and polyester acrylic type. [0004] Unsaturated polyester resin (UPR) is an earlier photocurable resin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/68C09D175/14C09D7/12
Inventor 吴志阳余桐柏符若文
Owner 广东百汇达新材料有限公司
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