Polyurethane pultrusion formulations for the production of articles with improved coating adhesion and articles produced therefrom

A technology of pultrusion and polyurethane, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve complex and other problems

Active Publication Date: 2016-02-24
COVESTRO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The solution to the problem of coating polyurethane composites produced by pultrusion is complicated by the fact that commercial systems for the production of polyurethane composites by pultrusion must include internal mold release agents so that Parts formed in pultrusion can be drawn through a pultrusion die without sticking to the die

Method used

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  • Polyurethane pultrusion formulations for the production of articles with improved coating adhesion and articles produced therefrom
  • Polyurethane pultrusion formulations for the production of articles with improved coating adhesion and articles produced therefrom
  • Polyurethane pultrusion formulations for the production of articles with improved coating adhesion and articles produced therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-24

[0076] Polyol mixtures consisting of the materials listed in Tables 1 and 2 were prepared in the amounts listed in Table 1 or Table 2. Each of these mixtures was then combined with ISO in the amounts shown in Table 1 or Table 2 to form polyurethane pultrusion formulations. The pultrusion formulations were each processed according to the general procedure described below using the same equipment and processing conditions for each formulation.

[0077] The general pultrusion procedure used in each of Examples 1-24 is as follows:

[0078] The polyisocyanates and isocyanate-reactive components listed in Table 1 or Table 2 were fed into the mixer / meter in the amounts specified in Table 1 or Table 2. The resulting reaction mixture was fed to an injection / infiltration tank maintained at a temperature of 15-23°C. The glass fibers are impregnated with the reaction mixture as they are drawn into the injection mold. The wetted glass fibers are then drawn from the injection box through...

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Abstract

Polyurethane composites to which paint will adhere without the need for an aggressive pretreatment are produced by a pultrusion process using a polyurethane-forming system that includes a polyisocyanate component containing at least one polyisocyanate and an isocyanate-reactive component containing at least one cashew oil-based polyether polyol.

Description

technical field [0001] The present invention relates generally to pultrusion, and more particularly to the use of pultrusion in the manufacture of articles to which paints, coatings and protective layers adhere better than known pultruded articles Polyurethane formulations, and articles prepared from these formulations by pultrusion. Background technique [0002] Pultrusion is a manufacturing method for preparing continuous lengths of fiber reinforced plastic ("FRP") structural shapes. Raw materials include liquid resin mixtures (which contain resin, fibers and specific additives) and reinforcing fibers. The method involves the use of a continuous drawing device to draw the raw materials - rather than squeeze them as in the case of extrusion - through a heated steel forming die. The reinforcement material is in continuous form, such as fiberglass mat rolls or fiberglass rovings. Two methods of impregnating or "wetting" glass are open bath and resin infusion. Commercially...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/72C08J5/04C08J9/04C08G18/08C08L75/04C09D175/04C08G101/00
CPCB29C70/521B29K2075/00C08G18/4891C08G18/7664C09D175/08C08G18/4816C08G18/4829C08G18/7671C08K7/14
Inventor S·J·哈拉辛J·E·海耶斯D·苏尼克
Owner COVESTRO LLC
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