Thermoplastic moulding compound

Patent metadata

Field	Value
Publication number	US-12215213-B2
Application number	US-202017432540-A
Country	US
Kind code	B2
Filing date	Feb 18, 2020
Priority date	Feb 20, 2019
Publication date	Feb 4, 2025
Grant date	Feb 4, 2025

Abstract

Described herein is a method of using glass fibers having a tensile strength according to DIN ISO 527-5 of 86.0 to 92.0 GPa, a tensile elastic modulus according to DIN ISO 527-5 of 2600 to 3200 MPa and a softening point according to DIN ISO 7884-1 of 900° C. to 950° C., the method including using the glass fibers to increase an impact strength and/or breaking elongation of molded articles made of molding materials including thermoplastic polyamides and elastomers.

First claim

The invention claimed is:

1. A method of using glass fibers having a tensile strength according to DIN ISO 527-5 of 86.0 to 92.0 GPa, a tensile elastic modulus according to DIN ISO 527-5 of 2600 to 3200 MPa and a softening point according to DIN ISO 7884-1 of 900° C. to 950° C., the method comprising using the glass fibers to increase an impact strength and/or breaking elongation of molded articles made of molding materials comprising thermoplastic polyamides and elastomers;
wherein the method comprises mixing components A) to C) and optionally D):
a) 30.0% to 89.0% by weight of at least one thermoplastic polyamide as component A),
b) 1.0% to 30.0% by weight of at least one elastomer as component B), selected from the group consisting of
b1) copolymers of ethylene with at least one comonomer selected from the group consisting of C 3-12 -olefins, C 1-12 -alkyl (meth)acrylates, (meth)acrylic acid and maleic anhydride as component B1),
b2) polyethylene or polypropylene elastomer as component B2),
wherein components B1) and B2) may also be additionally grafted with maleic anhydride,
c) 10.0% to 69.0% by weight of glass fibers having a tensile strength according to DIN ISO 527-5 of 86.0 to 92.0 GPa, a tensile elastic modulus according to DIN ISO 527-5 of 2600 to 3200 MPa and a softening point according to DIN ISO 7884-1 of 900° C. to 950° C. as component C), and
d) 0% to 30.0% by weight of further additives and processing aids as component D),
wherein the percentages by weight of the components A) to D) sum to 100% by weight,
and further comprises extruding, injection molding or blow molding thermoplastic molding material to produce fibers, films, or molded articles made of the thermoplastic molding material.

2. The method according to claim 1 , wherein glass fibers having the composition
C1) 55.5% to 62.0% by weight of SiO 2 ,
C2) 14.0% to 18.0% by weight of Al 2 O 3 ,
C3) 11.0% to 16.0% by weight of CaO,
C4) 6.0% to 10.0% by weight of MgO, and
C5) 0% to 4.0% by weight of further oxides
are employed,
wherein the proportions of C3) CaO and C4) MgO sum to between 17.0% and 24.0% by weight and the percentages by weight of C1) to C5) sum to 100% by weight.

3. The method according to claim 1 , wherein the thermoplastic molding materials comprise at least one elastomer selected from the group consisting of
b1) copolymers of ethylene with at least one comonomer selected from the group consisting of C 3-12 -olefins, C 1-12 -alkyl (meth)acrylates, (meth)acrylic acid and maleic anhydride as component B1), and
b2) polyethylene or polypropylene elastomer as component B2),
wherein components B1) and B2) may also be additionally grafted with maleic anhydride.

4. A thermoplastic molding material comprising
a) 30.0% to 89.0% by weight of at least one thermoplastic polyamide as component A),
b) 1.0% to 30.0% by weight of at least one elastomer as component B), selected from the group consisting of
b1) copolymers of ethylene with at least one comonomer selected from the group consisting of C 3-12 -olefins, C 1-12 -alkyl (meth)acrylates, (meth)acrylic acid and maleic anhydride as component B1),
b2) polyethylene or polypropylene elastomer as component B2),
wherein components B1) and B2) may also be additionally grafted with maleic anhydride,
c) 10.0% to 69.0% by weight of glass fibers having a tensile strength according to DIN ISO 527-5 of 86.0 to 92.0 GPa, a tensile elastic modulus according to DIN ISO 527-5 of 2600 to 3200 MPa and a softening point according to DIN ISO 7884-1 of 900° C. to 950° C. as component C), and
d) 0% to 30.0% by weight of further additives and processing aids as component D),
wherein the percentages by weight of the components A) to D) sum to 100% by weight.

5. The molding material according to claim 4 , wherein a component C) having the composition
C1) 55.5% to 62.0% by weight of SiO 2 ,
C2) 14.0% to 18.0% by weight of Al 2 O 3 ,
C3) 11.0% to 16.0% by weight of CaO,
C4) 6.0% to 10.0% by weight of MgO, and
C5) 0% to 4.0% by weight of further oxides
is employed,
wherein the proportions of C3) CaO and C4) MgO sum to between 17.0% and 24.0% by weight and the percentages by weight of C1) to C5) sum to 100% by weight.

6. The molding material according to claim 4 , wherein component D) comprises heat stabilizers, carbon black and lubricants.

7. The molding material according to claim 4 , wherein component B) is employed in an amount of 2.0% to 20.0% by weight.

8. The thermoplastic molding material according to claim 4 , wherein component A) is selected from the group consisting of polyamide 6, polyamide 66, polyamide 6.10 and copolymers or mixtures thereof.

9. The molding material according to claim 4 , wherein component C) is employed in an amount of 10.0% to 55.0% by weight.

10. The molding material according to claim 4 , which comprises component B1) in which the at least one comonomer is selected from the group consisting of C 3-8 -olefins, C 2-6 -alkyl acrylates, and maleic anhydride.

11. The molding material according to claim 4 , which comprises the component B1) and/or B2) grafted with maleic anhydride.

12. A process for producing a thermoplastic molding material according to claim 4 , the process comprising mixing the components A) to C) and optionally D).

13. A fiber, film or molded article made of the thermoplastic molding material according to claim 4 .

14. A process for producing fibers, films or molded articles made of the thermoplastic molding material according to claim 4 , the process comprising extruding, injection molding or blow molding the thermoplastic molding material.

15. The molding material according to claim 4 , wherein component B) is employed in an amount of 3.0% to 10.0% by weight.

16. The molding material according to claim 4 , wherein component B) is employed in an amount of 3.5% to 7.0% by weight.

17. The molding material according to claim 4 , wherein component C) is employed in an amount of 15.0% to 50.0% by weight.

18. The molding material according to claim 4 , wherein component C) is employed in an amount of 25.0% to 40.0% by weight.

Assignees

• Basf Se

Inventors

• Cremer Jens
• Spies Patrick

Classifications

• C08L77/02

  Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08L77/10 takes precedence) · CPC title

• C08L77/06

  Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence) · CPC title

• C03C2213/00

  Glass fibres or filaments · CPC title

• C03C13/00

  Fibre or filament compositions (manufacture of fibres or filaments C03B37/00) · CPC title

• C03C3/087

  containing calcium oxide, e.g. common sheet or container glass · CPC title