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Unsaturated polyester resin and the use of it

A polyester resin, unsaturated technology, applied in the field of unsaturated polyester resin, can solve the problems of loss of flexibility, high water absorption, affecting product stability, etc.

Inactive Publication Date: 2004-01-14
ASHLAND LICENSING & INTPROP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main problem of unsaturated polyester resin products in the prior art is high water absorption, which affects the product due to reduced flexural strength and elongation at room temperature and at temperatures as low as -20°C, resulting in loss of flexibility, seriously affecting the product stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1. The preparation of flexible unsaturated polyester resin A

[0035] 0.4 mole parts isophthalic acid, 0.4 mole parts polypropylene oxide diol and 0.1 mole parts polypropylene oxide triol are polymerized in the presence of a metal catalyst, suitably a tin catalyst, to an acid number below 10 in a reaction vessel. The mixture was cooled to 100°C, and 0.1 mole part of maleic acid was added. The reaction was carried out until the acid value was below 20. Apply vacuum as needed. The resulting cone and plate viscosity (I.C.I) was 11.5 ps at 125°C. According to GPC analysis, molecular weight Mn≈7500, Mw≈78000.

Embodiment 2

[0036] Embodiment 2. Application of flexible unsaturated polyester resin A

[0037] The linear resin A prepared in Example 1 was diluted to 40% styrene and cured with 1-2% MEKP and Co-salt. The resulting soft molds were tested and exhibited the mechanical properties shown in Table 1.

[0038] I.C.I. Viscosity in 40% Styrene (25°C)

Embodiment 3

[0039] Embodiment 3. Application of flexible unsaturated polyester resin A

[0040] The linear resin A prepared in Example 1 was diluted to 50% styrene and cured with 1-2% MEKP and Co-salt. The resulting soft mold was tested and found to have an elongation of 460% at room temperature.

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PUM

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Abstract

The invention relates unsaturated polyester resins for the manufacture of subzero flexible, weather-resistant products. The liquid unsaturated polyester resin comprises a linear unsaturated polyester obtained by reacting 5-30 mol % of one or more ethylenically unsaturated dicarboxylic acids (A), 20-45 mol % of one or more other aliphatic or aromatic acids (B) and 40-60 mol % of two or more polyhydric alcohols and 30-60 wt % of one or more reactive monomers. The linear unsaturated polyesters have a cone and plate viscosity (I.C.I.) of 2 ps / 125 DEG C.-20 ps / 125 DEG C. and a molecular weight Mw of 20,000-100,000. The invention also relates to a process for the manufacture of such unsaturated polyester resins and to the use of them in applications wherein good adhesion to supporting material and flexibility at ambient and especially at low temperatures are needed.

Description

technical field [0001] The present invention relates to unsaturated polyester resins, in particular to extremely flexible weather resistant unsaturated polyester resin based products, and to the use of said resins in applications such as concrete sealants and floor covering resins. In addition, the present invention also relates to the production method of this unsaturated polyester resin. Background technique [0002] Flexible unsaturated polyesters for coating, waterproofing and sealing are traditionally processed from dicarboxylic acids and polypropylene oxide or polyethylene oxide. Some of the acids must be unsaturated to be curable with typical peroxides or other free radical initiators. [0003] GB 792 854 discloses a method and resin product suitable for sealing pores in porous metal articles. More specifically, this patent describes a method of sealing pores in porous metal articles by impregnating metal with a water-dispersible polymerizable impregnating compositi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/52C08G63/676C08L67/06
CPCC08L67/06C08G63/52C08G63/676C08L2666/02
Inventor P·马布伯K·艾罗拉E·瓦尔托恩
Owner ASHLAND LICENSING & INTPROP LLC