IP Library › Granted Patent US 7,550,525
Granted Patent B2
US 7,550,525 · App. 11/200,418 · Granted Jun 23, 2009

Stability improvement of aluminum hydroxide in PVC compound

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Quick Facts
Patent No.
US 7,550,525
App. No.
11/200,418
Granted
Jun 23, 2009
Kind
B2
Abstract

An aluminum hydroxide composition is disclosed, having diminished tendency to cause discoloration on heating at 177° C. of a plastic composition whose major polymeric component is polyvinyl chloride, comprising aluminum hydroxide and an amount, effective in diminishing discoloration, of at least one inorganic perchlorate salt selected from the group consisting of alkali metal perchlorates and alkaline earth metal perchlorates.

Claims (7)

1. A method of diminishing the tendency to cause discoloration on heating at 177° C. of an aluminum hydroxide-containing polyvinyl chloride composition, comprising the steps of:

(A) mixing polyvinyl chloride with a masterbatch comprising aluminum hydroxide and at least one inorganic perchlorate salt selected from the group consisting of alkali metal perchlorates and alkaline earth metal perchlorates, said masterbatch containing from 7 parts by weight to 500 parts by weight of said perchlorate salt, calculated on a dry basis, per 100 parts by weight of aluminum hydroxide, and

(B) adding to the mixture formed in (A) additional aluminum hydroxide such that the composition contains:

(i) from 15 parts by weight to 150 parts by weight of aluminum hydroxide per 100 parts by weight of polyvinyl chloride, and

(i) from 0.03 parts by weight to 3 parts by weight of said inorganic perchlorate salt per 100 parts by weight of aluminum hydroxide.

2. The method of claim 1 , wherein the inorganic perchlorate salt is sodium perchlorate.

3. The composition of claim 2 , wherein the sodium perchlorate is sodium perchlorate monohydrate.

Assignments (2)
INTELLECTUAL PROPERTY SECURITY RELEASE AGREEMENT Recorded Mar 21, 2011
From: CITIBANK, N.A.
To: CHEMTURA CORPORATION; A & M CLEANING PRODUCTS, LLC; ASCK, INC; BIOLAB COMPANY STORE, LLC; AQUA CLEAR INDUSTRIES, LLC; ASEPSIS, INC.; BIOLAB TEXTILES ADDITIVES, LLC; BIOLAB, INC.; CROMPTON COLORS INCORPORATED; CROMPTON MONOCHEM, INC.; CNK CHEMICAL REALTY CORPORATION; CROMPTON HOLDING CORPORATION; GLCC LAUREL, LLC; GREAT LAKES CHEMICAL CORPORATION; GT SEED TREATMENT, INC.; ISCI, INC; GREAT LAKES CHEMICAL GLOBAL, INC.; HOMECARE LABS, INC.; KEM MANUFACTURING CORPORATION; LAUREL INDUSTRIES HOLDINGS, INC.; NAUGATUCK TREATMENT COMPANY; UNIROYAL CHEMICAL COMPANY LIMITED (DELAWARE); MONOCHEM, INC.; RECREATIONAL WATER PRODUCTS, INC.; WEBER CITY ROAD LLC; WRL OF INDIANA, INC.; BIOLAB FRANCHISE COMPANY, LLC
Reel/Frame 026039/0142 →
AMENDED AND RESTATED INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Feb 22, 2010
From: CHEMTURA CORPORATION; A & M CLEANING PRODUCTS, LLC; AQUA CLEAR INDUSTRIES, LLC; ASCK, INC.; ASEPSIS, INC.; BIOLAB COMPANY STORE, LLC; BIOLAB FRANCHISE COMPANY, LLC; BIOLAB TEXTILE ADDITIVES, LLC; BIO-LAB, INC.; CNK CHEMICAL REALTY CORPORATION; CROMPTON COLORS INCORPORATED; CROMPTON HOLDING CORPORATION; CROMPTON MONOCHEM, INC.; GLCC LAUREL, LLC; GREAT LAKES CHEMICAL CORPORATION; GREAT LAKES CHEMICAL GLOBAL, INC.; GT SEED TREATMENT, INC.; HOMECARE LABS, INC.; ISCI, INC.; KEM MANUFACTURING CORPORATION; LAUREL INDUSTRIES HOLDINGS, INC.; MONOCHEM, INC.; NAUGATUCK TREATMENT COMPANY; RECREATIONAL WATER PRODUCTS, INC.; UNIROYAL CHEMICAL COMPANY LIMITED (DELAWARE); WEBER CITY ROAD LLC; WRL OF INDIANA, INC.
To: CITIBANK, N.A.
Reel/Frame 023998/0001 →