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Clearcoat coatings with carbinol-functional siloxane resin

A silicone resin, clear coating technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve problems such as poor adhesion

Inactive Publication Date: 2013-03-13
BASF COATINGS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, coatings containing silicon-containing materials may have poor adhesion to subsequently applied coatings due to the low surface tension created by silicon atoms

Method used

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  • Clearcoat coatings with carbinol-functional siloxane resin
  • Clearcoat coatings with carbinol-functional siloxane resin
  • Clearcoat coatings with carbinol-functional siloxane resin

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Embodiment Construction

[0013] The preferred embodiments described below are merely exemplary in nature and in no way limit the invention, its application or uses.

[0014] The clearcoat coating composition of the present invention includes a carbamate-functional film-forming material, a methanol-functional non-linear silicone resin, and an aminoplast crosslinker.

[0015] Methanol-functional silicone resins include structures

[0016]

[0017] wherein R is a hydrocarbon group having 3 carbon atoms. This structure is expected to be formed by, for example, the reaction of an olefin with a siloxane over a platinum catalyst. Methanol-functional silicone resins are three-dimensional lattice structures in which some silicon atoms are bonded to three or more oxygen atoms. The silicone resin preferably comprises at least about 20 mole percent, preferably from about 20 mole percent to about 80 mole percent, of monomeric units having the structure

[0018]

[0019] In certain embodiments, the carbino...

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Abstract

A clearcoat coating composition contains a carbamate-functional film-forming material, a carbinol-functional, nonlinear siloxane resin, and an aminoplast crosslinking agent The clearcoat composition provides excellent high-bake repair adhesion of a repair coating layer over the clearcoat coating.

Description

technical field [0001] The present invention relates to industrial and automotive coating compositions, especially for exterior coatings or coatings forming the outermost layer of composite coatings. Background technique [0002] Clearcoat-basecoat composite coatings are widely used in the coating industry and are known for satisfactory image gloss, color depth, image clarity and / or special metallic effects. Composite systems are utilized especially by the automotive industry to achieve superior visual effects, especially high transparency. However, the high transparency of the clear coat makes defects easier to see. [0003] Silicon-containing materials have been incorporated into coating compositions to enhance the surface scratch and mar resistance of the coating. However, coatings of silicon-containing materials may have poor adhesion to subsequently applied coatings due to the low surface tension created by silicon atoms. Typically, when a silicon-containing material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D201/02C09D183/04
CPCC09D201/025C08G71/04C09D175/04C08L2666/14
Inventor G·G·麦诺夫希克J·A·吉尔博特R·G·施密特
Owner BASF COATINGS GMBH