US 2001/0018105 A1Published application

Multilayer plastic pipe with good layer adhesion

AssigneeDegussa-Huels Aktiengesellschaft

InventorsGuido Schmitz, Georg Oenbrink, Walter Hellermann, Thomas Grosse-Puppendahl, Harald Haeger

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Abstract

A multilayer plastic pipe having strong bonding between the layers has at least one layer I of a polyolefin molding composition comprising a polyolefin, at least one layer II of a polyester molding composition, and at least one layer III of an adhesion promoter containing reactive groups and located between layers I and II. The polyester molding composition of layer II comprises a polyester and one or more compounds selected from a compound having two or more carbodiimide groups, carboxylic anhydride groups, maleimide groups or oxazine groups.

Claims27

Dependent claims

A multilayer plastic pipe which comprises the following layers:

I) at least one layer I of a polyolefin molding composition comprising a polyolefin,
II) at least one layer II of a polyester molding composition, and
III) at least one layer III of an adhesion promoter containing reactive groups which is located between I and II,
wherein the polyester molding composition of layer II comprises a polyester and one or more compounds selected from
a) a compound having two or more carbodiimide groups,
b) a compound having two or more carboxylic anhydride groups,
c) a compound having two or more maleimide groups,
d) a compound having two or more oxazine groups.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/753,613Filed 4 Jan 2001
Priority: DE 10002461.021 Jan 2000
Published: 30 Aug 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

B32B 1/08
Layered products having a non-planar shape: tubular products
B32B 27/08
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin
B32B 27/36
Layered products comprising a layer of synthetic resin: comprising polyesters
F16L 9/123
Of plastics with or without reinforcement: with four layers

Family

No related US applications are recorded in the indexed filing history.

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