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US 9,884,945 B2Granted
Melamine-polyol dispersions and uses thereof in manufacturing polyurethane
AssigneeEvonik Degussa GmbH
InventorsJackson Su, Jacky Cao, Tadao Yasue, Mark Cao
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Abstract
Melamine-polyol dispersions comprising ethoxylated alcohols of specific structures are disclosed. Such dispersions maintain their stability under stationary conditions for at least 24 hours and are useful in the manufacturing of polyurethane foams. The resulted polyurethane foams display more evenly-distributed flame retardant properties.
Claims21
A dispersion obtained by
- contacting:
- at least one polyol,
- melamine particles, and
- at least one ethoxylated alcohol of the following formula:
- RO(CH2CH2O)nH
- wherein R is a C1-C31 linear alkyl group,
- n is an integer equal to or greater than 18;
- wherein the at least one ethoxylated alcohol has a hydrophilic-lipophilic balance (HLB) value of equal to or greater than about 15.7;
- and
- wherein the at least one ethoxylated alcohol is present in an amount of about 0.5 to 2.0 parts by weight per hundred weight parts of the at least one polyol of the dispersion.
7 more elements
A dispersion consisting essentially of:
- at least one polyol,
- melamine, and
- at least one ethoxylated alcohol of the following formula:
- RO(CH2CH2O)nH,
- wherein R is a C13 linear alkyl group and n is 40,
- wherein melamine is present in an amount of about 30 to about 80 parts by weight per hundred weight parts of the at least one polyol of the dispersion,
- wherein the at least one ethoxylated alcohol is present in an amount of about 0.7 to 2.0 parts by weight per hundred weight parts of the at least one polyol of the dispersion.
4 more elements
A method for making a dispersion, comprising:
- a) combining to form a mixture at least one polyol, melamine particles and at least one ethoxylated alcohol of the following formula:
- RO(CH2CH2O)nH,
- wherein R is a C1-C31 linear alkyl group,
- n is an integer equal to or greater than 18,
- wherein melamine particles are present in an amount of greater than 0 to about 80 parts by weight per hundred weight parts of the at least one polyol of the dispersion,
- wherein the at least one ethoxylated alcohol is in an aqueous solution, is present in an amount of about 0.7 to 2.0 parts by weight per hundred weight parts of the at least one polyol of the dispersion, is effective for keeping said dispersion stable for at least 24 hours, and has a hydrophilic-lipophilic balance (HLB) value of equal to or greater than about 15.7;
- and
- b) mixing the mixture of a) until a stable dispersion is formed.
5 more elements
Dependencies are inferred from the claim text.