One component thermose polyurethane system

A technology of heating and curing equipment, applied in the direction of coating, etc., can solve problems such as limitations

Inactive Publication Date: 2003-10-08
HUNTSMAN INT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Engineering and cost considerations of this complex two-

Method used

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  • One component thermose polyurethane system
  • One component thermose polyurethane system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] This example illustrates the pultrusion of a glass fiber reinforced one component open bath polyisocyanurate system. The reactive components in an open bath are as follows:

[0105] reactive components Dosage (%)

[0106] RUBINATE  7304 44.640

[0107] SUPRASEC  2544 44.640

[0108] Motor Oil 10W30 05.360

[0109] LOXIOL  G71S 05.360

[0110] total 100.00

[0111] The reaction mixture was kept at room temperature (25°C) during the experiment. Reinforcement material in the form of tapes and rovings (5 layers of two-way glass mat called 6-strand glass roving tape) was impregnated through the reaction mixture. The wet-out enhancing material is then passed through a series of outlets to remove excess impregnation reaction mixture. Excess reaction solution can be recycled back to the tank if collected under inert conditions (ie, free of moisture).

[0112] Using an airless spray gun (Wagner 1800 PSI 2 Step Pro Duty PowerPainter), apply D...

Embodiment 2

[0115] This example further illustrates the pultrusion of a glass fiber reinforced one-component open bath polyisocyanurate system. The reactive components in an open bath are as follows:

[0116] reactive components Dosage (%)

[0117] RUBINATE  7304 44.645

[0118] SUPRASEC  2544 44.645

[0119] Motor Oil 10W30 03.570

[0120] LOXIOL  G71S 03.570

[0121] Munch / INT / 20A 03.570

[0122] total 100.00

[0123] The above components were prepared as in Example 1 to form an open bath. The temperature of the chemical mixture, glass geometry and pull rate were kept constant as in Example 1. In this example, the catalyst concentration was reduced to half of that in Example 1. 15 parts by weight of DABCO  K-15 dissolved in 85 parts by weight of KEMESTER  5721-Motor oil-LOXIOL  G71S (0.5:1:1 weight ratio) mixture. A 15% catalyst solution was obtained and used to spray onto the resin-impregnated glass reinforcement. Using the airless spray gu...

Embodiment 3

[0124] This example further illustrates the pultrusion of a glass fiber reinforced one-component open bath polyisocyanurate system. The reactive components in an open bath are as follows:

[0125] reactive components Dosage (%)

[0126] RUBINATE  7304 44.645

[0127] SUPRASEC  2544 44.645

[0128] Motor Oil 10W30 04.460

[0129] LOXIOL  G71S 04.460

[0130] KEMESTER  5721 01.790

[0131] total 100.00

[0132] In this example, the catalyst concentration was reduced to 10%. 10 parts by weight of DABCO  K-15 was dissolved in 90 parts by weight of a Munch / INT / 20A-motor oil (1:1 by weight) mixture. A 10% catalyst solution was thus obtained and used to spray onto the resin-impregnated glass reinforcement. Using the airless spray gun described in Example 1, the catalyst solution was sprayed at a rate of about 0.1-0.15 g solution / s. The temperature range of the curing die coupled by the forming die is 260-270°F. The cooling coil is connected...

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Abstract

A process for the preparation of fiber reinforced composites in which the matrix polymer is derived from the catalyzed reaction of a liquid polyisocyanate containing material. The principle curing mechanism is the formation of urethane and/or isocyanurate linkages. At least a portion of the catalyst is applied onto the surface of the reinforcing fibers and/or onto the surface to the uncured resin impregnated reinforcing structure, under conditions such that the catalyst is not dispersed into the bulk of the isocyanate containing resin until cure. Curing is facilitated by a combination of mechanical and thermal action. The process is particularly well suited for the preparation of composites by pultrusion, using a one-component open-bath pultrusion machine. The process of the invention may be adapted to a much wider range of composite fabrication methods, including SMC and filament winding.

Description

[0001] This application claims the benefit of U.S. Patent Provisional Application Serial No. 60 / 226,126, filed August 18, 2000, entitled "One-Component Thermoset Polyurethane Systems," the principal material of which is incorporated herein as refer to. technical field [0002] The invention relates to a method for forming a fiber-reinforced composite body. Background technique [0003] Pultrusion is a method used to manufacture continuous fiber-reinforced linear composite bodies in which the fibers are embedded in a matrix polymer. Pultrusion is conventionally performed in a one-component open bath process with thermosetting resin systems having gel times of hours to days at room temperature. In this method, continuous fibers are impregnated through an open liquid resin bath and then pulled from a heated die and cured. The cured composite was then pulled with a mechanical puller and cut to length with a cut-to-length saw. [0004] In addition to this type of open bath met...

Claims

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Application Information

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IPC IPC(8): B29B15/12B29C70/50B29C70/52B29K75/00B29K105/08C08G18/08C08G18/09C08G18/10C08G18/40C08G18/66C08J3/24C08J5/24C08K3/40
CPCC08J5/24B29K2075/00C08G18/6674B29B15/125C08J3/24B29C70/50C08G18/092C08G2125/00C08G18/4018C08G18/10B29C70/52C08G18/08C08J5/244C08J5/249C08G18/7664
Inventor R·R·乔希H·R·吉利斯
Owner HUNTSMAN INT LLC
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