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Process for making urethane-isocyanurates

A technology of isocyanurate and polyisocyanurate, applied in the field of polyisocyanurate and polyurethane-isocyanurate polymers, can solve the problems of loss of resin characteristics, loss of quality, etc.

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

AI Technical Summary

Problems solved by technology

Under those conditions, the resin exhibits a loss of properties and may lose mass to surrounding moisture

Method used

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  • Process for making urethane-isocyanurates
  • Process for making urethane-isocyanurates

Examples

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example

[0043] The following examples are provided to illustrate exemplary embodiments and are not intended to limit the scope of the invention. All parts and percentages are by weight unless otherwise stated.

[0044] The following materials are mainly used in the mixture:

[0045]

[0046] Polyisocyanurates or polyurethane-isocyanurate polymers are prepared by the following general methods:

[0047] For stage (a), the polyol (shown in Tables 1 and 2 below) was charged into the mixing chamber of a high speed laboratory mixer (FlackTek SpeedMixer). The corresponding catalysts according to Tables 1 and 2 below were then added to the polyol and mixed thoroughly at 800 rpm for 5 seconds followed by 2000 rpm for 10 seconds. The corresponding polyisocyanates according to Tables 1 and 2 below were then added to the mixing chamber and mixed with the other components under the same mixing conditions. The resulting reaction mixture was emptied onto a circular steel mold with a diameter...

example 4 and example 5

[0058] For Examples 4 and 5, the polyol (Polyol E) was a trifunctional polyether polyol having predominantly primary hydroxyl end groups. For Examples 6 and 7, the polyol was a filled polyol. T of the post-cured samples in Examples 4 to 7 g is 160°C or higher, and its modulus at 121°C is higher than 7×10 8 Pa. After humidity aging, the T of each of Examples 4 to 7 g raised. This value is much higher than Comparative Examples A, B and C. The corrected 121°C G' also increased after humidity aging, as opposed to Comparative Examples A, B and C.

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Abstract

A method for exposing a substrate to water under superatmospheric pressure at a temperature of at least 70 DEG C includes (a) applying a reaction mixture to a substrate, which reaction mixture has an isocyanate index of at least 10 and includes an aromatic polyisocyanate component, a polyol component having a polyol with a hydroxyl equivalent weight of at least 500, and a catalyst component having an isocyanate trimerization catalyst, and at least partially curing the reaction mixture to form a polyisocyanurate or polyurethane-isocyanurate polymer having a glass transition temperature of at least 80 DEG C, and (b) exposing the substrate and the polyisocyanurate or polyurethane-isocyanurate polymer to water under superatmospheric pressure at a temperature of at least 70 DEG C.

Description

technical field [0001] Embodiments relate to polyisocyanurates and polyurethane-isocyanurate polymers, and methods for making polyisocyanurates and polyurethane-isocyanurate polymers, said polyisocyanurates The esters and said polymers are suitable for coating substrates. Background technique [0002] Phenolic resins have been used for over a century. These materials are very hard organic polymers. They are used for example in circuit boards, many types of electrical laminates, table tops, bearings, adhesives in friction surfaces such as brake pads, brake shoes and clutch discs, American billiard balls Balls for billiards and snooker, and other applications where stiffness (eg in the shell) is a desired attribute. [0003] These polymers often include residual formaldehyde which can escape as a gas during the useful life of the polymer and cause formaldehyde exposure problems. For this reason, there is an urgent need to find alternative materials. However, few other org...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/76C08G18/09C08G18/40C08G18/18C08G18/16C08G18/24C08G18/30C08G18/79C08J5/04C08G18/10
CPCC08G18/4825C08G18/4841C08J5/04C08G18/7664C08G18/794C08G18/092C08G18/10C08G18/163C08G18/1875C08G18/246C08G18/302C08G18/409C08G2125/00C08G2261/60C08J2375/04C09D5/00C09D175/04C09D175/08
Inventor K·欧J·C·梅迪娜R·P·帕拉德卡尔D·莱瑟姆M·迪普斯-托马斯
Owner DOW GLOBAL TECH LLC