IP Library › Granted Patent US 12679966
Granted Patent B2
US 12679966 · App. 17/626,620 · Granted Jul 14, 2026

Performance and processing of polyvinyl butyral (PVB)/acrylic composites

Inventors: Manoj Nerkar (Royersford, PA); Hailan Guo (Warrington, PA)
Assignee: ROHM AND HAAS COMPANY
C08L29/14C08L33/12C08L2207/20C08L2207/53
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Quick Facts
Patent No.
US 12679966
App. No.
17/626,620
Granted
Jul 14, 2026
Kind
B2
Abstract

A composition and a method for preparing a polymer composite article. The composition comprises (A) a polyvinyl butyral (PVB) polymer in an amount of from 10 to 90 wt. %. The composition also comprises (B) a filler in an amount of from 10 to 90 wt. %. Further, the composition comprises (C) an acrylic polymer additive in an amount of from greater than 0 to 10 wt. %, the acrylic polymer additive selected from acrylic copolymers having a weight average molecular weight of at least 4,000,000 Da and a core-shell acrylic additive having a crosslinked core and a shell comprising an acrylic homopolymer or copolymer. The ranges for components (A)-(C) are based on the total weight of components (A), (B) and (C) in the composition.

Claims (15)

1 . A composition for preparing a polymer composite article, said composition comprising:

(A) a polyvinyl butyral (PVB) polymer in an amount of from 10 to 90 wt. %;

(B) a filler in an amount of from 10 to 90 wt. %;

(C) an acrylic polymer additive in an amount of from greater than 0 to 20 wt. %, wherein the acrylic polymer additive is selected from an acrylic copolymer having a weight average molecular weight of at least 5,000,000 Da or a core-shell acrylic additive having a crosslinked core and a shell comprising an acrylic homopolymer or copolymer;

wherein said (C) acrylic polymer additive comprises an acrylic copolymer that is the reaction product of methyl methacrylate monomers and butyl acrylate monomers; and

wherein the acrylic copolymer comprises at least 60 wt. % of units derived from methyl methacrylate monomers based on the total weight of the acrylic copolymer;

each based on the total weight of components (A), (B) and (C) in said composition.

2 . The composition of claim 1 , wherein the acrylic polymer additive has a weight average molecular weight of at least 6,000,000 Da.

3 . The composition of claim 2 , wherein the acrylic polymer additive has a weight average molecular weight of at least 7,500,000 Da.

4 . The composition of claim 1 , wherein said (B) filler is selected from mineral fillers and organocellulosic fillers.

5 . A method of preparing a polymer composite article, said method comprising: preparing the polymer composite article from the composition of claim 1 .

6 . A polymer composite article prepared from the method of claim 5 .

7 . The composition of claim 1 , consisting essentially of components (A)-(C).

8 . The composition of claim 1 , consisting of components (A)-(C) and optionally one or more additives selected from a colorant, a blowing agent, a UV stabilizer, an antioxidant, a process aid, a preservative, a biocide, a flame retardant, an impact modifier, a heat stabilizer, and/or a lubricant.

9 . The composition of claim 1 , wherein component (A) comprises PVB in an amount of at least 95 wt. % based on the total weight of component (A).