阅读说明：本技术 一种改性聚酯的制备方法及含有该改性聚酯的涂料 (A kind of preparation method of modified poly ester and coating containing the modified poly ester ) 是由 宁坤 许峰 付静 童军 于 2019-08-29 设计创作，主要内容包括：本发明提供了一种改性聚酯的制备方法,包括如下步骤：由2-亚甲基-4-苯基-1,3-二氧戊环与二乙烯基苯,以及其它丙烯酸单体通过自由基共聚反应制得,所述2-亚甲基-4-苯基-1,3-二氧戊环占投料单体总摩尔含量的30-60%,二乙烯基苯占投料单体总摩尔含量的2-10%。本发明的有益效果体现在：本方法制备的改性聚酯主链含有很多酯键结构,能够对于金属基材有着很好附着力,同时在酯键旁边有较多的苯环能够很好的保护酯键。本方法制得的树脂的玻璃化转变温度高,提高了树脂的强度。丙烯酸单体部分能够提供很高的耐酸性,同时二乙烯基苯的引入提供部分的刚性支化结构,使得最终的产品性能得到进一步的提升。(The present invention provides a kind of preparation methods of modified poly ester, include the following steps: by 2- methylene -4- phenyl -1,3- dioxolanes and divinylbenzene, and other acrylic monomers are made by free radicals copolymerization reaction, 2- methylene -4- the phenyl -1,3- dioxolanes accounts for the 30-60% for the monomer total moles content that feeds intake, and divinylbenzene accounts for the 2-10% for the monomer total moles content that feeds intake.The beneficial effects of the present invention are embodied in: the modified poly ester main chain of this method preparation contains many ester bond structures, can there is fine adhesive force for metal base, while having more phenyl ring to can be good at protecting ester bond beside ester bond.The glass transition temperature of resin made from this method is high, improves the intensity of resin.Acrylic monomers part is capable of providing very high acid resistance, while the introducing of divinylbenzene provides the rigid branched structure of part, so that final properties of product are further promoted.)

1. a kind of preparation method of modified poly ester, characterized by the following steps: by 2- methylene -4- phenyl -1,3- bis- Butyl oxide link and divinylbenzene and other acrylic monomers are made by free radicals copolymerization reaction, the 2- methylene -4- benzene Base -1,3-dioxolane accounts for the 30-60% for the monomer total moles content that feeds intake, and divinylbenzene accounts for the monomer total moles content that feeds intake 2-10%。

2. a kind of preparation method of modified poly ester as described in claim 1, it is characterised in that: the acrylate monomer choosing From: iso-bornyl acrylate, lauryl acrylate, lauryl methacrylate, trifluoroethyl methacrylate, metering system Two kinds or more any combination in acid butyl ester.

3. a kind of preparation method of modified poly ester as claimed in claim 2, it is characterised in that: include the following steps, by the Asia 2- Methyl 4-phenyl -1,3-dioxolane, other acrylic monomers, divinylbenzene and initiator, are dissolved in organic solvent In be uniformly mixed, then under the protection of nitrogen, be warming up to 60-70 DEG C of reaction 2h, purification obtains modified poly ester after drying.

4. a kind of preparation method of modified poly ester as claimed in claim 2, it is characterised in that: the organic solvent is selected from fragrance Hydrocarbon solvent, alcohols solvent, ether solvent, esters solvent and ketones solvent it is one or more.

5. modified poly ester made from a kind of preparation method of modified poly ester as described in claim 1, it is characterised in that: described to change Property polyester number-average molecular weight be 5000-50000, glass transition temperature be 90-120 DEG C.

6. the painting of modified poly ester made from the preparation method containing a kind of modified poly ester as described in any one in claim 1-5 Material, it is characterised in that: the coating is applied to tank and listens interior painting.

7. as claimed in claim 6 containing the coating of modified poly ester, it is characterised in that: include at least one choosing in the coating Self-leveling agent, delustering agent, pigment wetting and dispersing agent, pigment, filler, defoaming agent, adhesion promoter coating additive.

Technical field

The invention belongs to technical field of coatings, and in particular to a kind of preparation method of modified poly ester and contain the modified poly ester Coating.

Background technique

With the gradual improvement of people's living standard, more and more people pursue the life of high quality, to the safety of food Problem is especially paid attention to, therefore current food safety also just becomes in the nature of things with worldwide challenge and public health concern Topic.

The metal can of China's food listens inner coating mainly or using epoxy resin and organosol resin at present, commonly uses In protecting metal can not by the corrosion of content, both it had been avoided that in metal can that heavy metal transformation increased the shelf-life to food in this way. Wherein, two kinds of most commonly seen materials are epoxy-phenolic resin and vinyl organosol resin.Epoxy-phenolic resin body System is used in tank listens now due to by the possible substance bisphenol-A migration problem for influencing health by a large amount of limitations It applies.But vinylite for metal adhesive force and preparation process in can introduce not tractable substance, use Also there is more problem.

Summary of the invention

The present invention provides a kind of preparation method of modified poly ester and contain the coating of the modified poly ester.

The purpose of the present invention is achieved through the following technical solutions:

A kind of preparation method of modified poly ester includes the following steps: by 2- methylene -4- phenyl -1,3-dioxolane and diethyl Alkenyl benzene and other acrylic monomers are made by free radicals copolymerization reaction, 2- methylene -4- phenyl -1,3- dioxy Penta ring accounts for the 30-60% for the monomer total moles content that feeds intake, and divinylbenzene accounts for the 2-10% for the monomer total moles content that feeds intake.

Preferably, the acrylate monomer is selected from: iso-bornyl acrylate, lauryl acrylate, methacrylic acid Lauryl, trifluoroethyl methacrylate, two kinds or more any combination in butyl methacrylate.

Preferably, include the following steps, by 2- methylene -4- phenyl -1,3-dioxolane, other acrylic monomers, two Vinyl benzene and initiator are dissolved in organic solvent and are uniformly mixed, then under the protection of nitrogen, be warming up to 60-70 DEG C 2h is reacted, obtains modified poly ester after purification is dry.

Preferably, the organic solvent is selected from aromatic hydrocarbon solvent, alcohols solvent, ether solvent, esters solvent and ketone Solvent it is one or more.

Preferably, the number-average molecular weight of the modified poly ester is 5000-50000, and glass transition temperature is 90-120 DEG C.

Preferably, the painting containing modified poly ester made from the preparation method of a kind of modified poly ester described in any of the above one Material, the coating are applied to tank and listen interior painting.

Preferably, in the coating comprising it is at least one selected from levelling agent, delustering agent, pigment wetting and dispersing agent, pigment, Filler, defoaming agent, adhesion promoter coating additive.

The beneficial effects of the present invention are embodied in: the modified poly ester main chain of this method preparation contains many ester bond structures, can There is fine adhesive force for metal base, while thering is more phenyl ring to can be good at protecting ester bond beside ester bond.We The glass transition temperature of resin made from method is high, improves the intensity of resin.Acrylic monomers part is capable of providing very high Acid resistance, while the introducing of divinylbenzene provides the rigid branched structure of part, so that final properties of product are obtained into one The promotion of step.

Specific embodiment

It is specifically described technical solution of the present invention with reference to embodiments.Certainly, the organic solvent and unlimited in the present invention It refers in this present embodiment, can also be substituted using conventional organic solvent, belong to range belonging to the present invention.