EP0139931A2
Expired / Lapsed
EP
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Process for neutralizing halogens and acids released in the processing of polymers
Assignee: Dow Chemical Co
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Filing: 1984-08-08
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Granted: —
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Expires: 2004-08-08
Abstract
Abstract There is described a process for for neutralizing halogen and/or acids released during processing of polymeric materials having thermally releasable acidic components and/or additives, which may release halogen and/or acids during processing to final products. The composition of matter is selected from a genus of multimetallic compounds having a hydroxyl content.
Inventors
- 👤 Christopher P. Christensen
- 👤 Walter W. Henslee
- 👤 Greene W. Strother, Jr.
- 👤 Thomas J. Hairston
- 👤 Ronnie H. Niswander
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 09:30
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02; C08K; C08K3/00; C08K3/10; C08K3/18; C08K3/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
146 words
In the processing of polymeric materials containg halogen and/or acid components and/or which incorpcate additives containing halogen and/or acid componts the improvement which comprises adding to the pomeric material during processing a sufficient amount of a composition having elements and groups and a rati of the elements and groups contained therein represented by the general formula A and are each one or more metals having valences of a and respectively; a has a value of 1 or 2; b has a value of 2 or 3, w, x and y are positive numbers or fracticns in which y is >2, and the ratio of x/w ≧1; z=0 to c ; C is one or more anions having a valence of c; and c has a value of 1, 2, or 3; such that ary hydrogen halides or other acids produced during said processing are effectively neutralized.
Claim 2
Dependent Claim
146 words
In the processing of polymeric materials containg halogen and/or acid components and/or which incorpcate additives containing halogen and/or acid componts the improvement which comprises adding to the pomeric material during processing a sufficient amount of a composition having elements and groups and a rati of the elements and groups contained therein represented by the general formula A and are each one or more metals having valences of a and respectively; a has a value of 1 or 2; b has a value of 2 or 3, w, x and y are positive numbers or fracticns in which y is >2, and the ratio of x/w ≧1; z=0 to c ; C is one or more anions having a valence of c; and c has a value of 1, 2, or 3; such that ary hydrogen halides or other acids produced during said processing are effectively neutralized.
Claim 3
Dependent Claim
149 words
The composition of Claim 1 wherein in the general formula for the scavenger C is, for example, CO = 3 , HCO - 3 , PO -3 4 , HPO = 4 , H 2 PO - 4 , SO - 4 , HSO - 4 , S , HS - , S03 S 2 O -2 5 , S 2 O -2 4 , S 2 O -2 2 , CN - , C -2 2 , I - 3 , HPO -2 3 , H 2 P 2 O 2- 5 , NH 2- , NH - 2 , NHOH - , N 2 H - 3 , NO - 2 , ClO - 2 , ClO - , O -2 , F - , Cl - , Br - , I , RCO - 2 , R(COO) -2 2 , wherein R is alkyl or aryl.
Claim 4
Dependent Claim
26 words
The process of Claim 1 wherein said scavenger is injected into the reaction mixture at a point at the end or just after the reactor system.
Claim 5
Dependent Claim
16 words
The process of Claim 1 wherein in the formula A is magnesium and B is aluminum.
Claim 6
Dependent Claim
15 words
The process of of Claim 4 wherein the composition is coated with a surface agent.
Claim 7
Dependent Claim
25 words
The process of Claim 1 wherein the amount of the composition is less than 0.5 part by weight per 10.0 parts by weight of resin.
Claim 8
Dependent Claim
20 words
The process of Claim 1 wherein the composition has an average secondary particle size of not more than 5 microns.
Claim 9
Dependent Claim
14 words
The process of Claim 1 wherein additives containing halogen components include brominated flame retardants.
Claim 10
Dependent Claim
19 words
The process of Claim 1 wherein polymers containing thermally releasable halogen include polyvinyl chloride, polyvinylidene dichloride, and chlorinated polyethylene.
Claim 11
Dependent Claim
15 words
The process of of Claim 4 wherein in the formula the ratio x/w is >1.
References Cited (Backward Citations)
No citation records indexed.
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