21 CFR § 177.2465 - Polymethylmethacrylate/poly(trimethoxysilylpropyl)methacrylate copolymers.

---
identifier: "/us/cfr/t21/s177.2465"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 177.2465 - Polymethylmethacrylate/poly(trimethoxysilylpropyl)methacrylate copolymers."
title_number: 21
title_name: "Food and Drugs"
section_number: "177.2465"
section_name: "Polymethylmethacrylate/poly(trimethoxysilylpropyl)methacrylate copolymers."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "B"
subchapter_name: "FOOD FOR HUMAN CONSUMPTION"
part_number: "177"
part_name: "INDIRECT FOOD ADDITIVES: POLYMERS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 321, 342, 348, 379e."
regulatory_source: "42 FR 14572, Mar. 15, 1977, unless otherwise noted."
cfr_part: "177"
---


# 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 of this chapter and § 177.2600, 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) of this chapter.

[59 FR 5948, Feb. 9, 1994]