---
kind: "section"
citation: "21 C.F.R. § 177.2465"
title: "21"
number: "177.2465"
heading: "Polymethylmethacrylate/poly(trimethoxysilylpropyl)methacrylate copolymers."
url: "https://uscodex.org/cfr/21/177.2465"
---

# §177.2465. Polymethylmethacrylate/poly(trimethoxysilylpropyl)methacrylate copolymers.


Polymethylmethacrylate/poly(trimethoxysilylpropyl) methacrylate copolymers (CAS Reg. No. 26936-30-1) may be safely used as components of surface primers used in conjunction with silicone polymers intended for repeated use and complying with [§ 175.300](/cfr/21/175.300.md) of this chapter and [§ 177.2600](/cfr/21/177.2600.md), in accordance with the following prescribed conditions.

- (a) **Identity.** For the purpose of this section, polymethylmethacrylate/poly(trimethoxysilylpropyl)methacrylate copolymers are produced by the polymerization of methylmethacrylate and trimethoxysilylpropylmethacrylate.
- (b) **Conditions of use.**
  - (1) The polymethylmethacrylate/poly(trimethoxysilylpropyl)methacrylate copolymers are used at levels not to exceed 6.0 percent by weight of the primer formulation.
  - (2) The copolymers may be used in food contact applications with all food types under conditions of use B through H as described in table 2 of [§ 176.170(c)](/cfr/21/176.170.md?p=c) of this chapter.

## Notes

### Amendments

[59 FR 5948, Feb. 9, 1994]

### Authority

Authority: 21 U.S.C. 321, 342, 348, 379e.

### Source

Source: 42 FR 14572, Mar. 15, 1977, unless otherwise noted.

### Amendments

[59 FR 5948, Feb. 9, 1994]