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High-solids binder combinations for scratch-resistant topcoats

A composition and adhesive technology, applied in the direction of adhesive types, ester copolymer adhesives, polyurea/polyurethane adhesives, etc., can solve the lack of solvent resistance and chemical resistance of PU coating materials, Problems such as low crosslink density

Active Publication Date: 2005-02-02
欧尼克斯荷兰有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PU coating materials prepared from it lack sufficient solvent and chemical resistance due to the resulting low crosslink density

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] Description of the preparation of the copolymers A1-A8 essential to the invention.

[0133] Copolymer

A1 A2 A3 A4 A5 A6 A7 A8

ingredient 1

Butyl acetate

Xylene

25.00 25.00 25.00 25.00 25.00 25.00 8.68 25.00

- - - - - - 6.32 -

ingredient 2

Styrene

Hydroxyethylmethyl

Acrylate

Butyl acrylate

ε-caprolactone

Acrylic Isoice

Tablet ester

polybutadiene

Nisso  B

1000 1)

acrylic

18.46 17.04 7.10 20.06 7.10 7.10 21.62 27.44

27.12 29.82 32.52 23.96 32.52 32.52 23.20 23.00

21.16 19.88 22.86 22.72 26.41 27.12 16.12 17.01

- - - - - - 16.45 -

- - 3.55 - - - - -

0.71 0.71 1.42 0.71 1.42 0.71 0.60 -

071 0.71 0.71 0.71 0.71 0.71 0.58 0.71

ingredient 3

Di-tert-butyl peroxide

Oxide

Butyl acetat...

Embodiment 2

[0138] Creative use of polyols B)

[0139] Polyol B1:

[0140] 3115 g of trimethylolpropane, 1345 g of ε-caprolactone and 2.2 g of dibutyltin dilaurate (DBTL) were charged in a reaction kettle identical to that of Example 1. The storage tank containing the above raw materials was heated to 160°C, stirred at 160°C for 6 hours, and then cooled to 20°C. The obtained essentially colorless resin has the following characteristic parameters:

[0141] Solid content: 99.5% by weight

[0142] Viscosity / 23℃: 4100mPa.s

[0143] Acid value: 0.5mgKOH / g

[0144] Hydroxyl value: 881mg KOH / g

[0145] Hydroxyl content: 26.7% by weight

[0146] Hazen color number: 44APHA

[0147] Appearance: Clear

[0148] Polyol B2

[0149] Analogously to polyol B1, 2746 g of trimethylolpropane and 1754 g of ε-caprolactone were reacted in the presence of 2.2 g of DBTL. The resin obtained this time has the following characteristic parameters:

[0150] Solid content: 99.2% by weight

[0151] Visco...

Embodiment 3

[0236] Preparation of mixtures of copolymers A1-A8 and polyols B1-B7

[0237] The copolymer and the polyol were stirred together at a certain ratio for 60 minutes at 60°C.

[0238] Polyol AB1:

[0239] Mixture of copolymer A6) mixed with polyol B1) in a ratio of 9:1 (based on solid resin). This mixed product regulates solid content to be 70% with butyl acetate, obtains a kind of colorless polyol resin with following characteristic parameter:

[0240] Solid content: 70.2% by weight

[0241] Viscosity / 23℃: 963mPa.s

[0242] Acid value, asf / SR: 7.9 / 11.2mg KOH / g

[0243] Hydroxyl value asf / SR: 189 / 269mg KOH / g

[0244] Hazen color number: 7APHA

[0245] Appearance: Clear

[0246] Polyol AB2:

[0247] Mixture of copolymer A4) mixed with polyol B1) in a ratio of 9:1 (based on solid resin). This mixed product regulates solid content to be 70% with butyl acetate, obtains a kind of colorless polyol resin with following characteristic parameter:

[0248] Solid content: 69.5...

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Abstract

High-solids binder combinations comprising polyisocyanates, special lactone-based polyols and polyacrylate-polyols, a process for preparing such binders, and their use for producing coatings. The lactone-based polyols include epsilon-caprolactone-based polyols having an average hydroxy functionality >=2 and a number-average molecular weight of from 119 to 2000 g / mol. The polyacrylate resins are prepared by copolymerizing optionally functional polybutadienes, aromatic monomers, hydroxyalkyl esters of acrylic or methacrylic acid having primary hydroxyl groups, aliphatic esters of acrylic or methacrylic acid and C1 to C8 monoalcohols, alpha,beta-unsaturated C3-C7 monocarboxylic or dicarboxylic acids or of one or more monoesters of maleic acid or fumaric acid and C1 to C14 monoalchols.

Description

[0001] References to related patent applications [0002] This patent application claims priority under 35 U.S.C. §119(a)-(d) of German Patent Application No. 10322620.6 filed May 20, 2003. technical field [0003] The present invention relates to novel, high solids binder compositions comprising polyisocyanates, specific lactone-based polyols and polyacrylate polyols, their preparation and their use in the preparation of coatings. Background technique [0004] The formulation of high solids coatings is of great interest due to its low content of volatile organic solvent content. But a central problem is to provide polyols that have a very low viscosity while giving the cured coating the necessary mechanical properties such as scratch resistance or hardness and other resistance properties such as solvent and chemical resistance . [0005] Coating materials based on polyacrylate polyols are superior to coating materials based on polyester polyols, especially in terms of fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/14C08F220/06C08F220/26C08G18/40C08G18/42C08G18/62C08K5/16C08L67/04C09D7/12C09D133/00C09D167/04C09D175/04C09D175/06C09J11/00C09J133/00C09J175/04
CPCC09D175/04C08G18/4277C08G18/4063C08G18/6254F21V23/026F21V23/06H05B41/02
Inventor C·瓦姆普雷希特M·梅希特尔J·蒂拉克T·克林马施
Owner 欧尼克斯荷兰有限公司