Anti-drip compositions including transparent blends of PMMA and PC-siloxane copolymer
US-11193014-B2 · Dec 7, 2021 · US
Transparent and flexible blends of PMMA and polycarbonate-siloxane copolymer
US11760878B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11760878-B2 |
| Application number | US-201917286873-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 22, 2019 |
| Priority date | Oct 22, 2018 |
| Publication date | Sep 19, 2023 |
| Grant date | Sep 19, 2023 |
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Abstract
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A thermoplastic composition includes from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA), and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt %. A method of making a thermoplastic composition includes: (a) combining from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA) and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt % to form a mixture; and melt processing the mixture to polymerize it and form the thermoplastic composition.
First claim
Opening claim text (preview).
The invention claimed is: 1. A thermoplastic composition comprising: from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA); and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt %, wherein the composition is hydrothermally stable, or wherein the composition has a storage modulus of at least about 600 MPa at 25° C. as tested in accordance with ASTM D638. 2. The thermoplastic composition according to claim 1 , wherein the poly(carbonate-siloxane) copolymer has a siloxane content of about 40 wt %. 3. The thermoplastic composition according to claim 1 , wherein the composition is transparent. 4. The thermoplastic composition according to claim 1 , wherein the composition is flexible. 5. The thermoplastic composition according to claim 1 , wherein the composition further comprises one or more additional additives. 6. The thermoplastic composition according to claim 5 , wherein the one or more additional additives is selected from the group consisting of: a filler; a pigment; a whitening agent; an optical brightener; a surfactant; a processing aid; a thermal stabilizer; a photochemical stabilizer; and combinations thereof. 7. The thermoplastic composition according to claim 1 , wherein the composition has a notched Izod impact strength as measured in accordance with ASTM D256 at 23° C. that is higher than that of a substantially identical reference composition that does not include the poly(carbonate-siloxane) copolymer. 8. The thermoplastic composition according to claim 1 , wherein the composition has a flexural modulus as measured in accordance with ASTM D790 at 23° C. that is lower than that of a substantially identical reference composition that does not include the poly(carbonate-siloxane) copolymer. 9. The thermoplastic composition according to claim 1 , wherein the composition has a nano-dispersed poly(carbonate-siloxane) copolymer phase in the PMMA and a single glass transition temperature (Tg). 10. A method of making a thermoplastic composition, comprising: (a) combining from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA) and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt % to form a mixture; and (b) melt processing the mixture to polymerize it and form the thermoplastic composition. 11. The method according to claim 10 , wherein step (b) is performed at a temperature of less than about 240° C. 12. An article comprising the thermoplastic composition according to claim 1 , wherein the article is a film for a consumer electronics device.
Assignees
Inventors
Classifications
- C08L33/12Primary
Homopolymers or copolymers of methyl methacrylate · CPC title
- C08L83/10Primary
Block- or graft-copolymers containing polysiloxane sequences (obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00) · CPC title
used for films · CPC title
Manufacture of films or sheets · CPC title
Homopolymers or copolymers of methyl methacrylate · CPC title
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- What does patent US11760878B2 cover?
- A thermoplastic composition includes from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA), and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt %. A method of making a thermoplastic composition includes: (a) combining from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA) and f…
- Who is the assignee on this patent?
- Shpp Global Tech Bv
- What technology area does this patent fall under?
- Primary CPC classification C08L33/12. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 19 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).