US 5,412,029 AGranted

Protective material capable of application in molten form

AssigneeHuels Aktiengesellschaft

InventorsRainer Elm, Helmut Kehr, Adolf Kuhnle, Matthias Schleinzer

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Abstract

A protective material, based on poly-.alpha.-olefins, capable of easy application in molten form, is distinguished by a balanced pattern of properties, good adhesion and good recycling capability. The present protective materials contain (I) not less than 50% by weight of one or more largely amorphous poly-.alpha.-olefins, composed of (a) 3 to 75% by weight of one or more .alpha.-olefins containing 4 to 10 carbon atoms, (b) 25 to 95% by weight of propene, and (c) 0 to 20% by weight of ethene; (II) not more than 30% by weight of other olefin homo- and copolymers which may be either largely amorphous or preferably partially crystalline; and (III) not more than 40% by weight of additives which are standard in the plastic sector. Such protective materials can be used in particular in the underfloor region of motor vehicles.

Claims8

Dependent claims

A composition which protects metallic, primed or lacquered surfaces, comprising:

(I) not less than 70% by weight of at least one poly-.alpha.-olefin having a degree of crystallinity of not more than 25% as determined by X-ray diffraction, comprising the following monomers:
(a) 3 to 75% by weight of at least one .alpha.-olefin having 4 to 10 carbon atoms,
(b) 25 to 94% by weight of propene, and
(c) 3 to 20% by weight of ethene;
and
(II) from 2 to 30% by weight of polypropylene,
wherein at least one of the components (I) and (II) comprises a functionalized polymer produced by free-radical grafting at least one of components (I) and (II) with 0.1 to 10% by weight of one or more functional comonomers selected from the group consisting of maleic anhydride, fumaric acid, acrylic acid, methacrylic acid, itaconic acid, aconitic acid, salts thereof, maleic anhydride, itaconic anhydride, methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, hydroxyethyl (meth)acrylate, hydroxybutyl (meth)acrylate, acrylamide, maleimide, itaconimide, vinyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, and adducts of maleic anhydrides with ammonia, ethylamine, ethanolamine, aniline, dibutylamine, methanol, ethanol, n-butanol, ethanediol, 1,4-butanediol, neopentyl glycol, glycerol, pentaerythritol or 1,4-cyclohexanedimethanol, based on the weight of the component to be functionalized.

4 more elements

Dependencies are inferred from the claim text.