# US 5,331,043 A · (Meth)acrylate resins with reduced yellowing, their production and use

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- Number: US 5,331,043 A
- Document ID: US5331043A
- Status: Granted
- Kind: A
- Application number: 08/002,383
- Filed: 1993-01-11
- Granted: 1994-07-19
- Earliest claimed: 1992-01-09
- Assignees: Degussa AG
- Inventors: Klaus-Uwe Koch; Heidi Mich
- Web page: https://patentgrep.com/patent/US5331043A

## CPC

- C08F 20/12: of monohydric alcohols or phenols
- C08F 2/02: Polymerisation in bulk
- C08F 265/06: Polymerisation of acrylate or methacrylate esters on to polymers thereof
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

A silane-containing methacrylate resin composition which produces non-yellowing polymers. The composition contains 20-99.9% by weight (meth)acrylic acid ester, optionally other comonomers or polymers and softeners as well as 0.1-30% by weight of a silane. 100 parts by weight of this mixture are polymerized in the presence of a free radical initiator, Cu.sup.2+ and a quaternary amine. The components can be stored in premixtures and brought to reaction. The polymer can be used in glass laminates.

## Claims

### Claim 1

A (meth)acrylate-containing, polymerizable mixture containing:
______________________________________ (Meth)acrylate (A) 20-99.9 parts by weight Comonomers (B) 0-79.9 parts by weight Soluble polymers 0-70 parts by weight in A or B (C) sum of A + B + C 59.9-99.9 parts by weight Silane 0.1-30 parts by weight Plasticizer 0-40 parts by weight the total of A + B + C + Silane + plasticizer being 100 parts by weight and, for each 100 parts by weight of the above-indicated components, free radical initiators 0.1-5 parts by weight organic Cu.sup.2+ 0.005-10d ppm Organic quaternary ammonium 0.005-3 parts by weight compounds Organic sulfur-containing chain 0-5 parts by weight. regulator compounds ______________________________________

### Claim 2 (depends on 1)

A polymerizable mixture as set forth in claim 1 in which the amount of comonomer is 0-5% by weight.

### Claim 3 (depends on 1)

A polymerizable mixture as set forth in claim 1 in which the free radical initiator is a peroxy ester.

### Claim 4 (depends on 1)

The polymerizable mixture as set forth in claim 1 in which the quaternary ammonium compound contains at least one member of the group consisting of aliphatic groups and benzyl groups.

### Claim 5 (depends on 1)

The polymerizable mixture as set forth in claim 1 in which the quaternary ammonium compound is a halide.

### Claim 6 (depends on 1)

A polymerizable mixture as set forth in claim 1 in which the quaternary ammonium compound contains 4-45 carbon atoms.

### Claim 7 (depends on 6)

A polymerizable mixture according to claim 6 in which each group in the quaternary ammonium compound contains 1-25 carbon atoms.

### Claim 8 (depends on 1)

A polymerizable mixture as set forth in claim 1 which is transparent, translucent or opaque.

### Claim 9 (depends on 1)

A method of producing a (meth)acrylic resin which comprises polymerizing a mixture as set forth in claim 1.

### Claim 10 (depends on 9)

A method as set forth in claim 9 which is carried out by bulk polymerization.

### Claim 11 (depends on 9)

A method as set forth in claim 9 in which the polymerization is carried out at a temperature of 15.degree.-80.degree. C.

### Claim 12 (depends on 9)

A method as set forth in claim 9 in which compounds A, B and C, the plasticizer and the organic Cu.sup.2+ compound are premixed.

### Claim 13 (depends on 12)

A method as set forth in claim 12 in which the premixture also contains dissolved polymers and the sulfur compound.

### Claim 14 (depends on 9)

A method as set forth in claim 9 in which the silane, at least a part of the plasticizer and the quaternary ammonium compound are premixed.

### Claim 15 (depends on 14)

A method as set forth in claim 14 in which the premixture also contains the sulfur compound

### Claim 16 (depends on 9)

A method as set forth in claim 9 in which the free radical initiator and at least a part of the plasticizer are premixed and the initiator is a peroxy ester.

### Claim 17 (depends on 9)

A polymer produced by the method of claim 9.