CA1103840A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Polycarbonates with end groups containing double bonds which can be crosslinked by uv light
Assignee: Bayer AG
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Filing: 1978-09-22
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Granted: 1981-06-23
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Expires: 1998-09-22
Abstract
Abstract ABSTRACT OF THE DISCLOSURE The present invention relaten to high-molecular weight arcwatic polycarbonates, based on diphenols and monofunctional chain stoppers, correnponding to the formula (I) (I) in which z denotes the radical of a diphenol, n denotes an integer from about 20 to 400, E denotes wherein m denotes 0 or 1 and R denotes H or C1-C3-alkyl. The present invention also relaten to a process for the preparation of the polycarbonatgs of the formula (I) com-prising reacting diphenols of the formula (II) HO - Z - OH (II) wherein z is a divalent aromatic radical, and/or their chlorocarbonic acid eacers in accordance with the processes which are known for the preparation of poly-carbonates, in a homogeneous or heterogeneous phase system, with compounds of the formula(III) (III) wherein m denotes D or 1 and R denotes H or C1-C3-alkyl. The prevent invention also relates to a process for cross-linking the polycarbonates of the formula (I) with UV light, after adding a photoinltlator and, optionally, flameproofing and photo-reducing agents. Finally, the present invention relates to tha cross-linked polycarbonates obtalned via this process.
Inventors
- 👤 Siegfried Adelmann
- 👤 Dieter Margotte
- 👤 Hugo Vernaleken
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-09 22:52
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/64; C08G64/00; C08G64/04; C08G64/06; C08G64/14; C08K; C08K5/00; C08K5/04; C08K5/07; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
65 words
High-molecular weight aromatic polycarbonates having molecular weights Mw (weight-average) between about 10,000 and 200,000 which are based on diphenols and mono-functional chain stoppers, characterized in that they correspond to the formula (I) (I) in which Z denotes the radical of a diphenol, n denotes an integer from about 20 to 400, E denotes wherein m denotes 0 or 1 and R denotes H or Cl-C3-alkyl.
Claim 2
Dependent Claim
65 words
High-molecular weight aromatic polycarbonates having molecular weights Mw (weight-average) between about 10,000 and 200,000 which are based on diphenols and mono-functional chain stoppers, characterized in that they correspond to the formula (I) (I) in which Z denotes the radical of a diphenol, n denotes an integer from about 20 to 400, E denotes wherein m denotes 0 or 1 and R denotes H or Cl-C3-alkyl.
Claim 3
Dependent Claim
80 words
A process for the preparation of the poly-carbonates of Claim 1, characterized in that diphenols of the formula (II) HO - Z - OH (II) wherein Z is a divalent aromatic radical, and/or their chlorocarbonic acid esters are reacted in accord-ance with the processes which are known for the preparation of polycarbonates, in a homogeneous or heterogeneous phase system, with compounds of the formula (III) LeA 18,392 (III) wherein m denotes 0 or 1 and R denotes H or Cl-C3-alkyl.
Claim 4
Dependent Claim
37 words
A process for the modi.fication of the poly-carbonates of Claim 1, wherein the polycarbonate is irradiated with UV light, after adding between about 0.05 and 5%, by weight, relative to the weight of polycarbonate, of a photoinitiator.
Claim 5
Dependent Claim
25 words
The process according to Claim 3, wherein between about 1 and 3% by weight, relative to the weight of polycarbonate, of a photoinitiator is employed.
Claim 6
Dependent Claim
26 words
The process of Claim 3, wherein the photo-initiator is added via solution and the polycarbonate is isolated as a film prior to irradiating with UV light.
Claim 7
Dependent Claim
23 words
The process of Claim 3, wherein the photo-initiator is added via compounding between about 280 and 330°C prior to irradiating with UV light.
Claim 8
Dependent Claim
32 words
The process according to Claim 3, wherein between about 0.05 and 5% by weight, based on the weight of polycarbonate, of a photo-reducing agent is added to the polycarbonate prior to irradiation.
Claim 9
Dependent Claim
29 words
The process of Claim 7, wherein the photo-reducing agent is added via solution and the polycarbonate is isolated as a film prior to irradiating with UV light. LeA 18,392
Claim 10
Dependent Claim
24 words
The process of Claim 7, wherein the photo-reducing agent is added via compounding between about 280 and 330°C prior to irradiating with UV light.
Claim 11
Dependent Claim
14 words
The process of Claim 7, wherein the photo-reducing agent is introduced in vapor form.
Claim 12
Dependent Claim
35 words
The process according to either Claim 3 or 7, wherein between about 0.05 and 5% by weight, relative to the weight of polycarbonate, of a flameproofing agent is added to the polycarbonate prior to irradiation.
Claim 13
Dependent Claim
25 words
The process of Claim 11, wherein between about 0.1 and 2% by weight, relative to the weight of polycarbonate, of a flameproofing agent is employed.
Claim 14
Dependent Claim
27 words
The process of Claim 11, wherein the flame-proofing agent is added via solution and the polycarbonate is isolated as a film prior to irradiating with UV light.
Claim 15
Dependent Claim
24 words
The process of Claim 11, wherein the flame-proofing agent is added via compounding between about 280 and 330°C prior to irradiating with UV light.
Claim 16
Dependent Claim
74 words
A process for cross-linking the polycarbonates of Claim 1, wherein the polycarbonate is dipped into a sol-vent mixture containing (a) between ahout 0.05 and 5% by weight, rela-tive to the weight of polycarbonate, of a photoinitiator, and (b) optionally, between 0.05 and 5% by weight, based on the weight of polycarbonate, of a photo-reducing agent, characterized in that the solvents are inert toward said polycarbonate and then irradiated with UV light. LeA 18,392 -19-
Claim 17
Dependent Claim
22 words
The process of Claim 3 wherein the polycar-bonate is sprayed with a solvent mixture containing the photoinltiator ancl optionally a photo-reducing agent.
Claim 18
Dependent Claim
12 words
Cross-linked polycarbonates produced by the process of either Claim 3 or 7.
Claim 19
Dependent Claim
27 words
The crosslinked polycarbonates of Claim 17 containing between about 0.05 and 5% by weight, relative to the weight of polycarbonate, of a flameproofing agent. LeA 18,392 -20-
References Cited (Backward Citations)
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