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Polyurethane composition for preparing composite material

A composite material and polyurethane technology, applied in the field of polyurethane composition, can solve problems such as difficult application and slow reaction speed, and achieve the effects of excellent weather resistance and mechanical strength, simple construction process and long operating time

Pending Publication Date: 2021-12-31
COVESTRO DEUTSCHLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the absence of a polyurethane reaction catalyst, the polyurethane composition increases the gel time compared with the traditional polyurethane system, but there is still a significant gap compared with the epoxy resin and unsaturated resin system commonly used in the industry
Moreover, the system without a polyurethane reaction catalyst is difficult to apply to processes that require fast and open operations, such as pultrusion and winding processes, due to the reduced reaction rate

Method used

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  • Polyurethane composition for preparing composite material
  • Polyurethane composition for preparing composite material
  • Polyurethane composition for preparing composite material

Examples

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Embodiment

[0130] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. When the definitions of terms in this specification conflict with the meanings generally understood by those skilled in the art to which the present invention belongs, the definitions stated herein shall prevail.

[0131] Unless otherwise indicated, all numbers expressing amounts of ingredients, reaction conditions, etc. used in the specification and claims are understood to be modified by the term "about". Accordingly, unless indicated to the contrary, the numerical parameters set forth herein are approximations that can vary as required to obtain the desired properties.

[0132] As used in this specification, "a", "an", "an" and "the" are intended to include "at least one" or "one or more" unless stated otherwise. For example, "a component" means one or more components, thus more tha...

Embodiment 8

[0173] Embodiment 8 winding process prepares polyurethane composite material

[0174] Mix according to the proportion of Example 1 in Table 1 to obtain the polyurethane composition, add 1% by weight BYK 066N and 2% by weight 3A molecular sieve (relative to the total weight of the polyurethane composition of Example 1), mix uniformly, and have a viscosity of 300mPa .s, gel time greater than 10 hours.

[0175] On commercially available winding equipment, the polyurethane composition is poured into an open dipping tank, and the glass fiber impregnated with the polyurethane composition is reciprocally wound between the two ends of the rotating mandrel according to the set winding process parameters. After the program is over, hang the mold core with polyurethane composite material on its surface into the rotary bracket in the curing furnace, start the curing furnace, the rotary bracket drives the mold core to rotate, and at the same time, hot air enters the curing furnace to cur...

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Abstract

The invention relates to a polyurethane composition for preparing a composite material, a polyurethane composite material prepared from the polyurethane composition and a method for preparing the polyurethane composite material. The polyurethane composition comprises: (a) an isocyanate component, (b) an isocyanate reactive component, (c) a free radical reaction initiator, and (d) an organometallic catalyst. The hydroxyl value of the isocyanate reactive component (b) is 200 mgKOH / g-700 mgKOH / g, and the molar ratio of an isocyanate group to a hydroxyl group of the composition is 0.6-1.5. The polyurethane composition disclosed by the invention has the advantages of long operable time and simple construction process, and the polyurethane composite material containing a polyurethane resin matrix prepared from the polyurethane composition disclosed by the invention has excellent weather resistance and mechanical strength.

Description

technical field [0001] The invention relates to a polyurethane composition for preparing a composite material, the polyurethane composite material prepared by it and a method for preparing the polyurethane composite material. Background technique [0002] Composite materials consisting of a polymer matrix and fibrous fillers are used primarily as lightweight construction materials in motor vehicle construction, shipbuilding, aircraft construction, the sports sector, the construction industry, the petroleum industry and the electrical and energy sector. The polymer matrix of the composite holds the fibrous filler, ensures the transfer of the load and protects the fibrous filler from the environment, and the fibrous filler serves to guide the load. Composite materials with excellent mechanical strength and physical properties can be obtained through a suitable combination of polymer matrix and fibrous fillers. [0003] The polymer matrix in composite materials, commonly used ...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/66C08G18/48C08G18/36C08J5/24C08L75/14C08K7/14C08K7/24
CPCC08G18/672C08G18/6696C08G18/4804C08G18/36C08J5/24C08J2375/14C08K7/14C08K7/24C08G18/4829C08G18/4837C08G18/242C08L75/08C08G18/73C08G18/7671C08G18/4816
Inventor 邓妍陈如其刘立果刘经梅
Owner COVESTRO DEUTSCHLAND AG
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