Thermal insulation gel with controlled crosslinking for...

Details Thermal insulation gel with controlled crosslinking for... Thermal insulation gel with controlled crosslinking for...

2005-08-23

2005-08-23

Cheung, William K. (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S776000, C524S848000, C524S871000, C525S055000, C526S318000

Reexamination Certificate

active

06933341

ABSTRACT:
The present invention relates to and uses, in order to prevent crude oil from “congealing” in a transportation line, a controlled-crosslinking thermal insulation gel, i.e. relatively fluid at the start and developing in-situ gelation in lines only under certain conditions, temperature conditions among other things. In order to obtain controlled crosslinking, it is possible to carry out 1) Physical crosslinkings, i.e. physical bonds between polymers—completely reversible bonds by thermal effect and/or mechanical shear—and 2) Chemical crosslinkings: monomers or polymers having functions allowing chemical bonds to be established between polymers.

REFERENCES:
patent: 4709982 (1987-12-01), Corne et al.
patent: 4941773 (1990-07-01), Vergouw
patent: 5177143 (1993-01-01), Chang
patent: 5221534 (1993-06-01), DesLauriers
patent: 2405345 (1979-04-01), None
patent: 1523958 (1978-09-01), None

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