Unlock instant, AI-driven research and patent intelligence for your innovation.

Synthetic polyurethane elastomer with unique morphology for use in subsea pipeline insulation

A composite polyurethane and elastomer technology, which is applied in the direction of heat insulation protection pipelines, pipeline protection, heat exchange equipment, etc., can solve the problems of lower substrate exposure, loss of heat insulation efficiency, etc.

Active Publication Date: 2019-09-06
DOW GLOBAL TECH LLC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in a loss of insulation efficiency and can expose the underlying substrate to the corrosive effects of seawater

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Synthetic polyurethane elastomer with unique morphology for use in subsea pipeline insulation
  • Synthetic polyurethane elastomer with unique morphology for use in subsea pipeline insulation
  • Synthetic polyurethane elastomer with unique morphology for use in subsea pipeline insulation

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0076] Example 1 and Comparative Samples A and B

[0077] Polyol A is a nominally trifunctional polyether made by adding propylene oxide to a trifunctional initiator followed by ethylene oxide. Polyol A contains about 15% by weight ethylene oxide. It contains mainly primary hydroxyl groups and has a hydroxyl equivalent weight of about 2050. Polyol A contained about 90 μg / g of terminal unsaturation.

[0078] The organomercury catalyst was commercial grade phenylmercury neodecanoate.

[0079] Zn catalysts are zinc carboxylates which contain some species with Zn-O-Zn bonds. It also contains not more than 0.1% by weight of other metal carboxylates.

[0080] The Zn / Zr catalyst is a mixture of about 99.25% zinc carboxylate and 0.74% zirconium carboxylate. Some carboxylate species have M-O-M bonds where M represents a metal, ie Zn or Zr.

[0081] The microspheres are 3M grade S38HS glass microspheres.

[0082] Polyisocyanate A is a modified MDI with an isocyanate equivalent we...

example 2

[0099] 62.5 g of polyol A were reacted with 45.5 g of polyisocyanate A under nitrogen until the isocyanate content was reduced to about 8% by weight. To the resulting prepolymer was added glass microspheres, yellow pigment, catalyst and defoamer in the amounts as set forth in Table 3.

[0100] table 3

[0101] Element parts by weight prepolymer 325.6 Zn / Zr Catalyst / Acetylacetone 0.10 / 0.4 Defoamer 0.06 glass microspheres 73.2 pigment 0.64

[0102] Then 400 parts of the prepolymer mixture were mixed with 30.9 parts of 1,4-butanediol. A portion of the resulting mixture was poured into a mold preheated to 50° C. and cured in the mold at said temperature for 2 hours. Samples were removed for microscopic examination. Micrograph formation of samples Figure 8 . Such as Figure 8 Visible in, similar to figure 2 For those morphological domains of the mercury-catalyzed elastomer shown in , the sample contained smaller discrete morpho...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

Use of non-mercury catalysts to make syntactic polyurethane elastomers. Elastomers are made from reaction mixtures containing polyether polyols, chain extenders, polyisocyanates and microspheres. The elastomer is morphologically characterized by the presence of smaller discrete morphological domains with a diameter of 0.1 to 3 μm and the substantial absence of discrete morphological domains with a diameter of 5 to 30 μm. Elastomers adhere well to themselves, making them well suited as insulating materials for pipelines and other structures with complex geometries.

Description

technical field [0001] The invention relates to a composite polyurethane elastomer, which is suitable for use as heat insulation materials for submarine pipelines and buildings. Background technique [0002] Subsea pipelines are used worldwide to transport oil and / or natural gas from subsea wellhead collection facilities on the ocean surface. Cooler sea temperatures can cause solid wax and hydrates to form as production fluids are pumped to the surface. This problem is ameliorated by applying insulation to the outside of the pipe. [0003] Rigid polyurethane foams are widely used as thermal insulation materials. These foams are generally produced by reacting polyisocyanates with curing agents in the presence of a blowing gas. The blowing gas is trapped in the cells of the foam. Trapped gas is largely responsible for the insulating properties of foam. Polyurethane insulating foam is a rigid material in most applications. However, highly rigid polyurethanes are not suita...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/66C08G18/10C08G18/22C08J9/32C08K7/28
CPCC08G18/4841C08G18/4866C08G18/6674C08G18/10C08G18/222C08J2375/04C08J9/32C08G18/3206C08K7/28F16L59/14
Inventor M·Y·格尔佛尔A·斯蒂芬逊V·S·明尼坎蒂M·布朗二世M·R·惠兰A·A·拉古拉曼
Owner DOW GLOBAL TECH LLC