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Flexible coatings for elastomer substrates

A technology of elastomer and coating composition, which is applied in coatings, carboxyl rubber coatings, conjugated diene coatings, etc., and can solve the problems of vulcanized rubber aging and recovery sensitivity

Inactive Publication Date: 2005-07-13
LORD CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional vulcanized coatings make vulcanized rubbers with good dynamic pressure resistance (flex period) extremely sensitive to aging and recovery

Method used

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  • Flexible coatings for elastomer substrates
  • Flexible coatings for elastomer substrates
  • Flexible coatings for elastomer substrates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0243] The following examples were prepared using Zetpol 2220, an X-HNBR polymer produced by Zeon Chemical with an acrylonitrile content of 36% and an unsaturation of 5 mole%. A suitable commercial substitute is Theban _ KA 8889.

[0244] The elastomer coating solution was prepared as follows:

[0245] Ingredient Description PHR

[0246] X-HNBR carboxylated hydrogenated nitrile-butadiene 100.0

[0247] This formulation is soluble in methyl isobutyl ketone (MIBK, CAS No. 108-10-1) with a solids content of 12.0% by weight.

[0248] To 40 grams of the solution was added 0.1 g, 0.5 g and 1.0 g of a 53% solution of bis-[isocyanatophenyl]methane (diisocyanate) in xylene. At 0.1 g of diisocyanate, the solution solidifies in less than 16 hours at room temperature. At 0.5 g, the solution solidified within 30 minutes.

[0249] To 40 grams of the solution were added 0.3, 0.7, 1.0 and 1.3 grams of 3-isocyanatopropyltriethoxysilane, CAS# 24801-88-5. At all levels, the coating compos...

Embodiment 2

[0281] Use Therban from Bayer AG _ Therban in trademark _ The following examples were prepared from KA 8889 obtained X-HNBR polymer.

[0282] The elastomer coating solution was prepared as follows:

[0283] Ingredient Description PHR

[0284] X-HNBR carboxylated hydrogenated nitrile-butadiene 100.0

[0285] This formulation is soluble in methyl isobutyl ketone (MIBK, CAS No. 108-10-1) with a solids content of 15.0% by weight.

[0286] 33 phr thin aluminum flakes with an average particle diameter of 16 microns were added to the coating solution.

[0287] In the solution of 97.5 wet weight parts, add the bis-[isocyanatophenyl] methane (diisocyanate) (Casabond _ TX, 53% in xylene).

[0288] A cured block of natural rubber 3″×3″×0.5″ (7.6cm×7.6cm×1.2cm) with a hardness A of 65 was applied to a dry film thickness of about 1 mil ( ).

[0289]A hole was drilled in the center of the block, 1.5 inches (3.8 cm), and a thermocouple was inserted to monitor the temperature. The blo...

Embodiment 3

[0308] Example 3 - Functionalized HNBR water-based latex

[0309] Element

Recipe 1

Recipe 2

Recipe 3

Recipe 4

Recipe 5

Recipe 6

41% solids X-

HNBR latex

100 g

100 g

100 g

100 g

100 g

100 g

diphenylmethane diiso

Cyanate Prepolymer

1 (aromatic)

1.25 grams

2.5 grams

5.0 grams

-

-

-

1,6-hexamethylene di

Isocyanate

Polyisocyanate

2 (aliphatic)

-

-

-

2.5 grams

5.0 grams

7.5 grams

[0310] 1 Desmodur _ XO 672

[0311] 2 Bayhydur _ 302 (1,6-HDI), available from Bayer Corporation

[0312] DeMattia flex samples were sprayed with the latex / isocyanate mixture listed above. The DeMattia sample was wiped with MIBK and stained with Chemlok _ 7701 treatment, the coating i...

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Abstract

The present invention discloses a radiation coating for flexible substrates, preferably for elastomers or elastomers bonded to metals. The coating composition is formed by mixing component (a) and component (b), wherein component (a) includes an organic solution or aqueous dispersion of a polymer or copolymer containing a functional group, and a thermally conductive filler; Part (b) includes liquid curing components such as polyisocyanates, carbodiimides or amino resins. The coating compound can be applied to the substrate before or after the substrate is vulcanized. The coating cures at ambient temperatures and dissipates heat during long-term use at elevated temperatures.

Description

field of invention [0001] The present invention relates to weatherable coatings applied to the exterior surfaces of articles of flexible substrates, particularly elastomeric or rubber articles or substrates containing these materials. In addition to providing protective film properties, the coating reduces heat buildup (heat dissipation) by conducting heat away from the article. The coating can be applied to the elastomeric substrate either before or after the substrate is vulcanized. Background of the invention [0002] Engineered elastic products are designed to flex and bend, twist and recover, and / or dampen forces including absorbing torque, or repetitive vibration during use, and are used in a variety of industrial applications. For example, elastomeric substances are used in tires, hoses, sealing tapes, racks such as engine mounts, shock absorbers, and insulation, etc., and are designed to exhibit hysteresis loss, heat resistance, etc. A few designs are listed here f...

Claims

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Application Information

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IPC IPC(8): C09D201/02C08J7/043C08J7/046C08K3/08C09D7/12C09D109/02C09D109/06C09D113/00C09D115/00C09D119/00C09D123/08C09D123/26C09D123/28C09D133/00C09D135/02C09D153/00C09D153/02C09D171/03C09D175/04C09D201/06
CPCC08J2321/00C08K3/08C08K2201/001C09D115/005C08J7/0427C08J7/043C08J7/046
Inventor 詹姆斯·R·哈拉迪弗兰克·J·克拉科夫斯基小埃内斯特·B·特劳顿
Owner LORD CORP
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