Thermoplastic multilayer composites
AssigneeHuels Aktiengesellschaft
InventorsHans Jadamus, Stefan Rober
Life of this patent
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Abstract
The present invention relates to a thermoplastic multilayer composite of polyamide and polyvinylidene fluoride having adhesive bonding layers and improved resistance to chemical agents such as, for example, methanol-containing fuels. The multilayer composite comprises: (I): at least one layer comprising a moulding compound of polyamide, (II): at least one layer adjacent to said layer (I) comprising a moulding compound comprising a mixture of (a) polyvinylidene fluoride, and (b) polyglutarimide, wherein the layers (I) and (II) are adhesively bonded to one another.
Claims9
A thermoplastic multilayer composite comprising:
- (I) at least one layer comprising a molding compound of a polyamide, and
- (II) at least one layer adjacent to said layer (I) comprising a molding compound comprising a mixture of:
- (a) from 97.5 to 50% by wt. of polyvinylidene fluoride or vinylidene fluoride copolymer, and
- (b) from 2.5 to 50% by wt. of polyglutarimide comprised of the monomer units:
- (i) from 14 to 85% by weight of ##STR5## (ii) from 10 to 75% by weight of ##STR6## (iii) from 0 to 15% by weight of ##STR7## (iv) from 7 to 20% by weight of ##STR8## wherein the sum of (i), (ii), (iii) and (iv) of component IIb is 100%, and wherein alkyl is methyl, ethyl, propyl, butyl, or hexyl;
- and R.sub.1 to R.sub.4, identical or different, are hydrogen or (C.sub.n H.sub.2n+1) wherein n is an integer of from 1 to 6, and wherein said layers (I) and (II) are directly bonded to one another.
A molding comprising a thermoplastic multilayer composite comprising:
- (I) at least one layer comprising a molding compound of a polyamide, and
- (II) at least one layer adjacent to said layer (I) comprising a molding compound comprising a mixture of:
- (a) from 97.5 to 50% by wt. of polyvinylidene fluoride, and
- (b) from 2.5 to 50% by wt. of polyglutarimide comprised of the monomer units:
- (i) from 14 to 85% by weight of ##STR13## (ii) from 10 to 75% by weight of ##STR14## (iii) from 0 to 15% by weight of ##STR15## (iv) from 7 to 20% by weight of ##STR16## wherein the sum of (i), (ii), (iii) and (iv) is 100% of component IIb, and wherein alkyl is methyl, ethyl, propyl, butyl, or hexyl;
- and R.sub.1 to R.sub.4, identical or different, are hydrogen or (C.sub.n H.sub.2n+1) wherein n is an integer of from 1 to 6, and wherein said layers (I) and (II) are directly bonded to one another.
A hollow profile comprising a thermoplastic multilayer composite comprising:
- (I) at least one layer comprising a molding compound of a polyamide, and
- (II) at least one layer adjacent to said layer (I) comprising a molding compound comprising a mixture of
- (a) from 97.5 to 50% by wt. of polyvinylidene fluoride, and
- (b) from 2.5 to 50% by wt. of polyglutarimide comprised of the monomer units:
- (i) from 14 to 85% by weight of ##STR17## (ii) from 10 to 75% by weight ##STR18## (iii) from 0 to 15% by weight of ##STR19## (iv) from 7 to 20% by weight of ##STR20## wherein the sum of (i), (ii), (iii) and (iv) is 100% of component IIb, and wherein alkyl is methyl, ethyl, propyl, butyl, or hexyl;
- and R.sub.1 to R.sub.4, identical or different, are hydrogen or (C.sub.n H.sub.2n+1) wherein n is an integer of from 1 to 6, and wherein said layers (I) and (II) are directly bonded to one another.
Dependencies are inferred from the claim text.