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Hydrophobic heat-resistant silicone modified polyester resin and preparation method thereof

A technology for modifying polyester and polyester resin, applied in the field of chemical synthesis of new materials, can solve the problems of complex process, limited reaction degree, poor environmental protection, etc., and achieve low surface energy, good anti-fouling property, excellent hydrophobicity Effect

Active Publication Date: 2016-12-14
HANGZHOU JIHUA POLYMER MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Patent CN102167807B discloses a preparation method of modified hydroxyl polyester resin, which adopts: a) reaction process, b) curing process, c) mixing process to prepare a kind of silicone modified polyester resin, the reaction degree of silicone resin Higher, but the film-forming process needs to add caprolactam-blocked isophorone diisocyanate as a curing agent, and needs to add an organic tin catalyst, the process is complex, and the environmental protection is poor; patent CN103131142B provides a silicone modified polyester The preparation method of the resin adopts the monomer copolymerization modification method, and the product is obtained through one-step reaction, which simplifies the reaction process, but the reaction degree of the organosilicon intermediate is limited, and a silane coupling agent needs to be added to improve the relationship between the organosilicon resin and the polyester resin. compatibility

Method used

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  • Hydrophobic heat-resistant silicone modified polyester resin and preparation method thereof

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preparation example Construction

[0043] The invention provides a hydrophobic and heat-resistant silicone-modified polyester resin and a preparation method thereof. Specifically, the hydrophobic and heat-resistant silicone-modified polyester resin is made of the following components in parts by weight:

[0044] 3-8 parts of dihydric alcohol,

[0045] Trihydric alcohol 100-120 parts,

[0046] 60-120 parts of dibasic acid,

[0047] Silicone intermediate 100-250 parts,

[0048] Catalyst 0.5-1 part,

[0049] With water agent 5-10 parts,

[0050] 160-240 parts of organic solvent;

[0051] Wherein, the organosilicon intermediate has a weight average molecular weight of 800-2000, contains 3-20% of hydroxyl groups and 2.5-15% of methoxy groups or ethoxy groups.

[0052] The present invention obtains a hydroxyl-terminated saturated polyester resin through the copolymerization of A2 monomers (diacids) and B3 monomers (trihydric alcohols) through multifunctionality monomers, and the hydroxyl-terminated saturated polye...

Embodiment 1

[0071] A method for preparing a hydrophobic heat-resistant silicone-modified polyester resin, comprising the following steps:

[0072] 1) Preparation of hydroxyl-terminated saturated polyester resin: Add 5 parts by weight of neopentyl glycol and 120 parts by weight of trimethylol in a reaction device equipped with a nitrogen gas feed device, a mechanical stirrer, a thermometer, a reflux condenser, and a water separator Propane, heat up to 120 °C, feed nitrogen and start stirring, keep warm for 30 minutes, after the material melts, add 100 parts by weight of isophthalic acid and 5 parts by weight of xylene, heat up to 140 °C, keep warm for 1 hour, then heat up to 160 ℃, heat for 1 hour, heat up to 190°C, heat for 2 hours, heat up to 210°C, heat for 1-2 hours, after the acid value is less than 10mgKOH / g resin, cool down to 130°C, add 100 parts by weight of propylene glycol methyl ether acetate to dilute , to obtain a hydroxyl-terminated saturated polyester resin;

[0073] 2) Si...

Embodiment 2

[0075] 1) Preparation of hydroxyl-terminated saturated polyester resin: Add 8 parts by weight of 1,4-cyclohexanedimethanol and 100 parts by weight of trimethylolpropane, heat up to 120°C, blow in nitrogen and start stirring, keep warm for 15 minutes, after the material is melted, add 60 parts by weight of isophthalic acid, 20 parts by weight of 1,4-cyclohexanedicarboxylic acid With water agent, heat up to 150°C, heat up for 0.5h, heat up to 170°C, heat up for 0.5h, heat up to 200°C, heat up for 1h, heat up to 220°C, heat up for 1-2h, until the acid value is less than 10mgKOH / After g of resin, the temperature was lowered to 150° C., and 120 parts by weight of dipropylene glycol butyl ether was added for dilution to obtain a hydroxyl-terminated saturated polyester resin product.

[0076] 2) Organosilicon modification: In the reaction device equipped with a nitrogen feed device, a mechanical stirrer, a thermometer, a reflux condenser, and a water separator, add the polyester res...

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Abstract

The invention discloses hydrophobic heat-resistant silicone modified polyester resin and a preparation method thereof. Specifically, the hydrophobic heat-resistant silicone modified polyester resin is prepared from the following components in parts by weight: 3-8 parts of dihydric alcohol, 100-120 parts of triatomic alcohol, 60-120 parts of diacid, 100-250 parts of silicone intermediate, 0.5-1 part of catalyst, 5-10 parts of water-carrying agent and 160-240 parts of organic solvent, wherein the weight-average molecular weight of the silicone intermediate is 800-2000, and the silicone intermediate contains 3-20% of hydroxyl and 2.5-15% of methoxyl or ethoxy group. The hydrophobic heat-resistant silicone modified polyester resin has excellent hydrophobic property, heat resistance, oxidative resistance and anti-yellowing performance, and also has low surface energy, good pollution resistance, metal adhesive force and mechanical energy. The technical process of the preparation method is simple in operation, and repeatability is good.

Description

technical field [0001] The invention relates to the field of chemical synthesis of new materials, in particular to the technical field of preparation and application of functional polymer materials, and more specifically to a hydrophobic heat-resistant silicone-modified polyester resin and a preparation method thereof. Background technique [0002] Polyester resin is a polymer compound with ester bond as the main structure, which is produced by polycondensation reaction of polyhydric alcohol and polybasic acid. According to whether the molecular chain contains unsaturated bonds, polyester resins can be divided into unsaturated polyesters and saturated polyesters, and according to the end groups of saturated polyester molecular chains, saturated polyesters can be divided into hydroxyl-terminated and carboxyl-terminated. . [0003] The hydroxyl-terminated saturated polyester resin has excellent metal adhesion, good physical and mechanical properties such as brightness, plumpn...

Claims

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Application Information

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IPC IPC(8): C08G63/91C08G63/20
CPCC08G63/20C08G63/916
Inventor 钱涛刘海龙李希刘海兵
Owner HANGZHOU JIHUA POLYMER MATERIAL CO LTD
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