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Paint for pot not containing BADGE and BPA

一种涂料、饮料的技术，应用在涂层、薄料处理、运输和包装等方向，能够解决底漆组合物不符合、高费用等问题

Active Publication Date: 2008-12-03
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is disadvantageous because more, costly processing steps are required, and because many primer compositions do not comply with food laws

Method used

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  • Paint for pot not containing BADGE and BPA

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0037] The exemplary can coating composition of the present invention can be prepared and used as follows. Paint batches can be prepared using a stirring mixer as follows:

[0038] Preferably, the solvent or part of the solvent mixture is put into the mixer, and then the acrylic resin is added. After the resin is solvated, PVC resin is preferably added and dispersed at room temperature or high temperature. All additional components are added gradually, wherein the crosslinking agent is preferably added in dissolved form. Additives should be added as solvates or liquid dispersions.

[0039] An exemplary composition was prepared using the following components:

[0040]

[0041] Once a homogeneous mixture of the coating composition is obtained, it can be applied to tin-plated steel, chrome-plated steel or aluminum, and dried at a temperature of 150°C to 250°C, for example, at about 200°C, preferably for 10-20 minutes, More preferably, 12-15 minutes.

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Abstract

The present invention relates to a composition, which is useful for producing coatings for metal sheet substrates of metal cans for storing and / or transporting food or beverages or a lid thereof, and which comprises the following components: (a) 30 to 90 wt. % of a polyvinylchloride- (PVC) -polymer, (b) 7 to 25 wt. % of an acrylic resin, (c) 3 to 40 wt .% of a crosslinking agent, which is produced from phenol, para-tert, -butylphenol, xylenol or a mixture thereof, and formaldehyde, (d) 0 to 8 wt. % additive, (e) 0 to 50 wt. % pigment and (f) a solvent-component, where all weight percentages are on the basis of the total dry weight of the coating composition (without solvents) and the composition is substantially free of bisphenol-A-diglycidyl- ether ('BADGE') and also substantially free of bisphenol-A- resins. The composition provides metal can coatings that have suitable flexibility, scratch resistance, adherence and sterilization resistance when processed in contact with food. The coatings are suitable for three-piece cans as well as deep-drawn metal cans. In particular they are, however, useful for lids that are to be torn open due to their extraordinary flexibility and sterilization resistance.

Description

Background technique [0001] Metal containers used to hold food and beverages usually have one or more coatings to prevent contact between the filled product and the metal. This is to prevent or minimize the corrosion of metals by the product and any adverse effects on product quality. In order to make this type of container, such as tin- or chrome-plated steel or aluminum cans, the metal sheets used are properly coated before they are formed (for example, for three-piece can products) or deformed (for example, deep drawing). The coating composition. In the manufacture of food and beverage cans, the coatings used are required to have very good flexibility and low toxicity. In addition, cans filled with food are usually sterilized up to 135°C. Therefore, the coating must be sufficiently stable at those temperatures and must be able to adhere to the surface of the metal. [0002] Epoxy phenolic coatings have been used as paints applied to metal cans (for example, three-piece cans), a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L61/06C08L33/06C09D127/06B05D7/22
CPCC08L61/06Y10T428/1355B05D2202/00Y10T428/1393Y10T428/31688C08L27/06B65D23/02B05D3/0254B65D25/14C08L33/06C09D127/06
Inventor C·富格特P·安布罗西B·里斯
Owner HENKEL KGAA
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