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EP0112726A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

UV-stabilisation of oxymethylene copolymers

Assignee: Celanese Corp
•
Filing: 1983-12-22
•
Granted: —
•
Expires: 2003-12-22
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Abstract

Abstract An improved moulding composition is provided which exhibits desirable weathering resistance and UV stability comprising an oxymethylene copolymer having at least one chain containing from about 85 to 99.6 mole percent of oxymethylene units interspersed with about 0.4 to 15 mole percent of oxyethylene units, about 0.1 to 1 percent by weight of 1,6--hexamethylene bis(3,5-di-tert-butyl)-4-hydroxy hydrocinnamate, about 0.015 to 0.4 percent by weight of 2,4,6-triamino-sym-triazine, about 0.1 to 0.75 percent by weight of bis(1,2,2,6,6-pentamethyl-4-piperidinyl)((3,5-bis(1,1 -di- i methylethyl-4-hydroxyphenol)methy4) butyl propanedioate and about 0.25 to 1.0 percent by weight of 2-hydroxy-4-n--octoxy-benzophenone.

Inventors

  • 👤 Walter R. Bryant

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 09:17
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435; C08K5/04; C08K5/13; C08K5/132; C08K5/134; C08K5/1345; C08K5/3467; C08K5/3477; C08K5/3492; C08K5/34922

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 87 words
A moulding composition based on (a) an oxymethylene copolymer having a melting point of at least 150°C. and having at least one chain containing from 85 to 99.6 mole percent of oxymethylene units interspersed with from 0.4 to 15 mole percent of oxyethylene units; wherein the moulding composition comprises, by weight thereof: (b) 0.1 to 1.0 percent of 1,6-hexamethylene bis-(3,5-di-tert-butyl)-4 hydroxy hydrocinnamate; (c) 0.015 to 0.4 percent of 2,4,6-triamino-sym-triazine (d) 0.1 to 0.75 percent of bis(1,2,2,6,6-pentamethyl-4-piperidinyl)((3,5-bis(1,1-dimethylethyl-4-hydroxyphenol)methyl)) butyl propanedioate; and I (e) 0.25 to 1.0 percent of 2-hydroxy-4-n-octoxy-benzophenone.
Claim 2
Dependent Claim 87 words
A moulding composition based on (a) an oxymethylene copolymer having a melting point of at least 150°C. and having at least one chain containing from 85 to 99.6 mole percent of oxymethylene units interspersed with from 0.4 to 15 mole percent of oxyethylene units; wherein the moulding composition comprises, by weight thereof: (b) 0.1 to 1.0 percent of 1,6-hexamethylene bis-(3,5-di-tert-butyl)-4 hydroxy hydrocinnamate; (c) 0.015 to 0.4 percent of 2,4,6-triamino-sym-triazine (d) 0.1 to 0.75 percent of bis(1,2,2,6,6-pentamethyl-4-piperidinyl)((3,5-bis(1,1-dimethylethyl-4-hydroxyphenol)methyl)) butyl propanedioate; and I (e) 0.25 to 1.0 percent of 2-hydroxy-4-n-octoxy-benzophenone.
Claim 3
Dependent Claim 20 words
The composition of claim 1 wherein component (b) is present in an amount of 0.2 to 0.5 percent by weight.
Claim 4
Dependent Claim 23 words
- The composition of claim 1 or 2 wherein component (c) is present in an amount of 0.1 to 0.4 percent by weight.
Claim 5
Dependent Claim 24 words
The composition of any of claims 1 - 3 wherein component (d) is present in an amount of 0.15 to 0.35 percent by weight.
Claim 6
Dependent Claim 24 words
The composition of any of claims 1 - 4 wherein component (e) is present in an amount of 0.15 to 0.35 percent by weight.
Claim 7
Dependent Claim 13 words
The composition of any of claims 1 - 5 further comprising a filler.
Claim 8
Dependent Claim 14 words
The composition of any of claims 1 - 5 further comprising a reinforcing agent.

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