Composition, polymer composite article formed therewith, and method of preparing same

Patent metadata

Field	Value
Publication number	US-11208557-B2
Application number	US-202017065147-A
Country	US
Kind code	B2
Filing date	Oct 7, 2020
Priority date	Feb 1, 2018
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

A composition and a method for preparing a polymer composite article. The composition comprises (A) a filler in an amount of from 10 to 90 wt. The composition also comprises (B) a polymer in an amount of from 10 to 90 wt %, wherein the (B) polymer is selected from polyolefins, polyamides, polyesters, or combinations thereof. Further, the composition comprises (C) an organopolysiloxane in an amount of from greater than 0 to 10 wt. %; the (C) organopolysiloxane having at least one silicon-bonded hydroxyl group and a viscosity of from 1,000 to 60,000 mPa·s at 25° C. The ranges for components (A)-(C) are based on the total weight of components (A), (B) and (C) in the composition.

First claim

What is claimed is:

1. A composition for preparing a polymer composite article, said composition comprising:
(A) a filler in an amount of from 10 to 90 wt. %, wherein the (A) filler comprises a mineral filler, a glass fiber, a carbon fiber, or combinations thereof;
(B) a polymer in an amount of from 10 to 90 wt. %, wherein the (B) polymer is selected from polyolefins, polyamides, polyesters, polycarbonates, or combinations thereof;
(C) an organopolysiloxane in an amount of from greater than 0 to 10 wt. %; the (C) organopolysiloxane having at least one silicon-bonded hydroxyl group and a viscosity of from 1,000 to 60,000 m·Pas at 25° C.;
each based on the total weight of components (A), (B) and (C) in said composition; and
(D) a compatibilizer comprising silane grafted polyethylene, maleic anhydride grafted polyethylene, and/or maleic anhydride grafted polypropylene.

2. The composition of claim 1 , wherein the (A) filler comprises the mineral filler, and wherein the mineral filler comprises calcium carbonate (CaCO 3 ) and/or talc.

3. The composition of claim 1 , wherein the (AB) polymer is selected from the group consisting of polyolefins, polyamides, polyesters, and combinations thereof.

4. The composition of claim 3 , wherein the (AB) polymer comprises a polyolefin selected from the group consisting of polyethylenes (PE), polypropylenes (PP), polybutylenes, pol (1-butene), polyisobutene, poly(1-pentene), poly(3-methyl-1-pentene), poly(4-methyl-1-hexene), poly(5-methyl-1-hexene), polycycloolefins, and combinations thereof.

5. The composition of claim 1 , further comprising one or more additives selected from (E) a colorant, (F) a blowing agent, (G) a UV stabilizer, (H) an antioxidant, (I) a process aid, (J) a preservative, (K) a biocide, (L) a flame retardant, and (M) an impact modifier.

6. The composition of claim 1 , wherein: (i) the (C) organopolysiloxane is present as a liquid at 25° C.; (ii) the (C) organopolysiloxane is present in said composition in a solid carrier component comprising the (C) organopolysiloxane; (iii) the (C) organopolysiloxane has a viscosity of from 4,000 to 50,000 m·Pas at 25° C.; or (iv) any combination of (i) to (iii).

7. The composition of claim 1 , wherein the (C) organopolysiloxane has the following average unit formula:
[R 1 3-n (OH) n SiO 1/2 ] a′ [R 1 2-m (OH) m SiO 2/2 ] b′ [R 1 SiO 3/2 ] c′ [SiO 4/2 ] d′ ;
wherein each R 1 is an independently selected hydrocarbyl group; n is 0, 1, 2, or 3, m is 0, 1 or 2, with the proviso that n and m are not simultaneously 0; 0<a′<1; 0<b′<1; 0≤c′≤0.1; and 0≤d′≤0.1, with the proviso that a′+b′+c′+d′=1.

8. The composition of claim 1 , wherein the (C) organopolysiloxane has the following average unit formula (I) or (II):
[R 1 3-n (OH) n SiO 1/2 ] a″ [R 1 2-m (OH) m SiO 2/2 ] b″   (I)

wherein each R 1 is an independently selected hydrocarbyl group; n is 0, 1, 2, or 3, m is 0, 1 or 2, with the proviso that n and m are not simultaneously 0; 0<a″<1; 0<b″<1; with the proviso that a″+b″=1; or
R 1 3-x (OH) x SiO[SiR 1 2 O] c″ Si(OH) y R 1 3-y   (II)

wherein each R 1 is an independently selected hydrocarbyl group; x is 0, 1, 2, or 3, y is 0, 1, 2, or 3, with the proviso that x and y are not simultaneously 0; and c″ is from 60 to 1,200.

9. The composition of claim 1 , wherein the (B) polymer comprises an elastomer.

10. The composition of claim 9 , wherein the elastomer comprises ethylene propylene diene monomer (EPDM).

11. A method for preparing the composition of claim 1 , the method comprising:
1) combining the (A) filler and the (C) organopolysiloxane by spraying, impregnation, blending or mixing to give a mixture,
2) optionally heating the mixture, the (A) filler and/or the (C) organopolysiloxane,
3) blending all or a portion of mixture of the (A) filler and the (C) organopolysiloxane and (B) the polymer, and thereafter
4) feeding the product of step 3) into an extruder.

12. A polymer composite article formed from the method of claim 11 .

Assignees

• Dow Silicones Corp
• Dow Global Technologies Llc

Inventors

• Bruce Keith
• Chorvath Igor
• Courtemanche Marc-Andre
• Degroot Jr Jon V
• Gaal Sean
• Gross Craig
• Keenihan James
• Mealey Shawn
• Miller Scott
• Parsons Tom
• Schlader Andrew
• Serrat Cristina
• Tonge Lauren

Classifications

• B29K2401/08

  Cellulose derivatives · CPC title

• C08K3/34

  Silicon-containing compounds · CPC title

• B29C48/022

  characterised by the choice of material · CPC title

• C08K9/04

  Ingredients treated with organic substances {(treated with macromolecular compounds C08K9/08)} · CPC title

• C08L23/06 Primary

  Polyethylene · CPC title