Composite plastic part with improved adhesion between the plastic components contained in the composite plastic part

Patent metadata

Field	Value
Publication number	US-2016200883-A1
Application number	US-201414913119-A
Country	US
Kind code	A1
Filing date	Aug 18, 2014
Priority date	Aug 21, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

The present invention relates to a plastic composite component (CC) which has a first plastic component (C1) and a second plastic component (C2) and comprises a polyethyleneimine (PEI) for improving the adhesion between C1 and C2. The present invention further relates to a process for producing this plastic composite component (CC), to a process for improving the adhesion between a first plastic component (C1) and a second plastic component (C2) in a plastic composite component (CC) and to the use of polyethyleneimine for improving the adhesion between a first plastic component (C1) and a second plastic component (C2) in a plastic composite component (CC).

First claim

1 .- 15 . (canceled)

16 . A process for producing a plastic composite component (CC) comprising the following steps:
a) providing a first plastic component (C1) comprising
ia) a matrix composition (MC) comprising a polyamide matrix polymer (PAM) and at least one first fiber material (F1) for reinforcement,
and

ib) a surface composition (SC) which comprises a polyamide surface polymer (PAS) and forms a surface of C1,
and

b) molding a second plastic component (C2) comprising a polyamide molding polymer (PAA) onto the surface of C1; wherein SC and/or C2 comprises a polyethyleneimine (PEI) for improving the adhesion between C1 and C2, wherein in step a), C1 is placed into a mold and in step b), C2 is injected into the mold in the molten state.

17 . The process for producing a plastic composite component (CC) according to claim 16 , wherein the polyethyleneimine (PEI) has a weight-average molecular weight M W in the range from 600 to 300 000 g/mol.

18 . The process for producing a plastic composite component (CC) according to claim 16 , wherein the polyethyleneimine (PEI) comprises primary, secondary and tertiary amino groups, where the ratio of primary to secondary to tertiary amino groups is in the range from 1:0.8:0.5 to 1:1.3:0.8.

19 . The process for producing a plastic composite component (CC) according to claim 16 , wherein the polyethyleneimine (PEI) is a hyperbranched polymer having a degree of branching DB in the range from 10% to 99%, where DB is defined as DB (%)=100×(T+Z)/(T+Z+L) where T is the mean number of terminal-bonded monomer units, Z is the mean number of monomer units that form branches and L is the mean number of linear-bonded monomer units in the polyethyleneimine (PEI).

20 . The process for producing a plastic composite component (CC) according to claim 16 , wherein the plastic composite component (CC) comprises 0.01% to 5% by weight of polyethyleneimine (PEI), based on the total weight of the plastic composite component (CC).

21 . The process for producing a plastic composite component (CC) according to claim 16 , wherein SC and C2 comprise polyethyleneimine (PEI).

22 . The process for producing a plastic composite component (CC) according to claim 16 , wherein the first fiber material (F1) is a continuous fiber material.

23 . The process for producing a plastic composite component (CC) according to claim 16 , wherein SC, MC and C2 comprise polyethyleneimine (PEI).

24 . The process for producing a plastic composite component (CC) according to claim 16 , wherein C2 comprises a second fiber material (F2).

25 . The process for producing a plastic composite component (CC) according to claim 16 , wherein the second fiber material (F2) is a short fiber material.

26 . A plastic composite component (CC) comprising
i) a first plastic component (C1) comprising
ia) a matrix composition (MC) comprising a polyamide matrix polymer (PAM) and at least one first fiber material (F1) for reinforcement,
and

ib) a surface composition (SC) which comprises a polyamide surface polymer (PAS) and forms a surface of C1,
and

ii) a second plastic component (C2) which comprises a polyamide molding polymer (PAA) and has been molded onto the surface of C1, wherein SC and/or C2 comprises a polyethyleneimine (PEI) for improving the adhesion between C1 and C2.

27 . A method for improving the adhesion between a first plastic component (C1) and a second plastic component (C2) in a plastic composite component (CC), wherein CC comprises
i) a first plastic component (C1) comprising
ia) a matrix composition (MC) comprising a polyamide matrix polymer (PAM) and at least one first fiber material (F1) for reinforcement,
and

ib) a surface composition (SC) which comprises a polyamide surface polymer (PAS) and forms a surface of C1,
and

ii) a second plastic component (C2) which comprises a polyamide molding polymer (PAA) and has been molded onto the surface of C1;
the method comprising incorporating a polyethyleneimine (PEI) into SC and/or C2.

28 . A process for improving the adhesion between a first plastic component (C1) and a second plastic component (C2) in a plastic composite component (CC), comprising the following steps:
a) providing a first plastic component (C1) comprising
ia) a matrix composition (MC) comprising a polyamide matrix polymer (PAM) and at least one first fiber material (F1) for reinforcement,
and

ib) a surface composition (SC) which comprises a polyamide surface polymer (PAS) and forms a surface of C1,
and

b) molding a second plastic component (C2) comprising a polyamide molding polymer (PAA) onto the surface of C1,
wherein
SC and/or C2 comprises a polyethyleneimine (PEI) for improving the adhesion between C1 and C2,
wherein in step a), C1 is placed into a mold and in step b), C2 is injected into the mold in the molten state.

29 . A plastic composite component (CC) which is obtained by the process according to claim 16 .

Assignees

• Basf Se

Inventors

• Habraken Gijsbrecht
• Prusty Manoranjan
• Radtke Andreas
• Kasaliwal Gaurav Ramanlal

Classifications

• C08J5/12 Primary

  Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives · CPC title

• C08J2479/02

  Polyamines · CPC title

• C08J5/10 Primary

  characterised by the additives used in the polymer mixture · CPC title

• C08J2377/02

  Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08J2377/10 takes precedence) · CPC title

• C08L79/02

  Polyamines · CPC title