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US 6,552,153 B1Granted
Thermoplastic resins having incorporated mold release agents
AssigneeBayer Aktiengesellschaft
InventorsWolfgang Kaufhold, Friedemann Müller, Wolfgang Bräuer, Hans-Georg Hoppe, Hans-Georg Wussow
Life of this patent
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Abstract
A mixture of hydroxy-terminated hydrocarbons useful as a mold release agent for polymers is disclosed. The polymers suitable in the present context are the ones prepared by polyaddition or polycondensation, in particular, thermoplastic polyurethane and polyurethane urea.
Claims9
A thermoplastic polyurethane prepared by reacting
- A) an organic diisocyanate,
- B) at least one linear hydroxyl-terminating polyol having an average molecular weight Mn of 500 to 5,000 g/mol, selected from the group consisting of polyester diols, polyether diols and polycarbonate diol,
- C) a chain extender selected from the group consisting of (i) and (ii) wherein (i) is a diamine having an average molecular weight Mn of 60 to 500 g/mol and wherein (ii) is a member having a number average molecular weight of 60 to 450 g/mol, selected from the group consisting of diols having 2 to 14 carbon atoms, diesters of terephthalic acid with glycols having 2 to 4 carbon atoms, hydroxyalkylene ether of hydroquinone and ethoxylated bisphenol, and,
- D) from 0.5 to 10 wt. %, with reference to the weight of the total product, of a mixture prepared from
- a) 30≦×≦95 wt. % relative to the weight of the mixture of a hydroxyl-terminating hydrogenated polybutadiene of the formula (I)
- HO—CH2—CH2—[—(CH2—CH2)m—{CH2—CH(CH2—CH3)}n—]—CH2—CH2—OH (I)
- wherein the ratio m/n is from 3:1 to 1.33:1, having an average molecular weight Mn of 1000 to 10,000 g/mol, a functionality of from 1.9 to 2.0 and a polymolecularity index Mw/Mn of from 0.8 to 1.4,
- b) 0≦y≦70 wt. % relative to the weight of the mixture of a hydroxyl-terminating hydrogenated polybutadiene of the formula (II)
- CH3—CH2—[—(CH2—CH2)p—{CH2—CH(CH2—CH3)}q—]—CH2—CH2—OH (II)
- wherein the ratio p/q is from 3:1 to 1.33:1, having an average molecular weight Mn of 500 to 10,000 g/mol, a functionality of from 0.9 to 1.0 and a polymolecularity index Mw/Mn of from 0.8 to 1.4,
- c) 0≦z≦70 wt. % relative to the weight of the mixture of hydroxyl-terminating block copolymer prepared from polyisoprene and poly(co-ethylene-butylene-styrene), having a styrene unit content of approximately 40 wt. %, an average molecular weight Mn of 500 to 10,000 g/mol, a functionality of from 0.9 to 1.0 and a polymolecularity index Mw/Mn of from 0.8 to 1.4, and a molar ratio ethylene/butylene in the range of 3:1 to 1.33:1, wherein 5 wt. %≦(y+z)≦70 wt. %,
- wherein the molar ratio of the NCO groups in A) to the groups capable of reacting with isocyanate in B), C) and D) is from 0.9 to 1.2 and wherein the sum of a), b) and c) totals 100 wt. %.
9 more elements
In the process of preparing a thermoplastic polyurethane resin by polyaddition reaction, the improvement comprising introducing into the reaction a mold release mixture comprising
- a) 30 to 95 percent of a hydroxyl-terminated hydrogenated polybutadiene of the formula (I)
- HO—CH2—CH2—[—(CH2—CH2)m—{CH2—CH(CH2—CH3)}n—]—CH2—CH2—OH (I)
- having a number average molecular weight of 1000 to 10,000 g/mol, a functionality of 1.9 to 2.0, an index of Mw/Mn of 0.8 to 1.4, and a ratio m/n in the range of 3:1 to 1.33:1,
- b) 0 to 70 percent of a hydroxyl-terminated hydrogenated polybutadiene of the formula (II)
- CH3—CH2—[—(CH2—CH2)p—{CH2—CH(CH2—CH3)}q—]—CH2—CH2—OH (II)
- having a number average molecular weight of 500 to 10,000 g/mol, a functionality of 0.9 to 1.0, an index of Mw/Mn of 0.8 to 1.4, and a ratio p/q in the range of 3/1 to 1.33/1, and
- c) 0 to 70 percent of hydroxyl-terminated block copolymer of polyisoprene and poly(co-ethylene-butylene-styrene), having a styrene content of about 40 percent relative to the weight of c), a number average molecular weight of 500 to 10,000 g/mol, a functionality of 0.9 to 1.0, an index of Mw/Mn of 0.8 to 1.4, and a molar ratio ethylene/butylene in the range of 3:1 to 1.33:1, and
- provided that 5≦(b+c)≦70 percent, with said percent being relative to the total weight of a)+b)+c).
5 more elements
A thermoplastic polyurethane resin having improved mold releasing properties prepared by introducing a mold release mixture into a reaction mixture for the making of said thermoplastic polyurethane, said mold release mixture comprising
- a) 30 to 95 percent of a hydroxyl-terminated hydrogenated polybutadiene of the formula (I)
- HO—CH2—CH2—[—(CH2—CH2)m—{CH2—CH(CH2—CH3)}n—]—CH2—CH2—OH (I)
- having a number average molecular weight of 1000 to 10,000 g/mol, a functionality of 1.9 to 2.0, an index of Mw/Mn of 0.8 to 1.4, and a ratio m/n in the range of 3:1 to 1.33:1,
- b) 0 to 70 percent of a hydroxyl-terminated hydrogenated polybutadiene of the formula (II)
- CH3—CH2—[—(CH2—CH2)p—{CH2—CH(CH2—CH3)}q—]—CH2—CH2—OH (II)
- having a number average molecular weight of 500 to 10,000 g/mol, a functionality of 0.9 to 1.0, an index of Mw/Mn of 0.8 to 1.4, and a ratio p/q in the range of 3/1 to 1.33/1, and
- c) 0 to 70 percent of hydroxyl-terminated block copolymer of polyisoprene and poly(co-ethylene-butylene-styrene), having a styrene content of about 40 percent relative to the weight of c), a number average molecular weight of 500 to 10,000 g/mol, a functionality of 0.9 to 1.0, an index of Mw/Mn of 0.8 to 1.4, and a molar ratio ethylene/butylene in the range of 3:1 to 1.33:1,
- provided that 5≦(b+c)≦70 percent, with said percent being relative to the total weight of a)+b)+c) and wherein said improved properties are set in comparison to a corresponding resin in the preparation of which said mold release mixture has not been introduced.
5 more elements
A thermoplastic polyurethane prepared by reacting
- A) an organic diisocyanate,
- B) at least one linear hydroxyl-terminating polyol having an average molecular weight Mn of 500 to 5,000 g/mol, selected from the group consisting of polyester diols, polyether diols and polycarbonate diol,
- C) a chain extender selected from the group consisting of (i) and (ii) wherein (i) is a diamine having an average molecular weight Mn of 60 to 500 g/mol and wherein (ii) is a member having a number average molecular weight of 60 to 450 g/mol, selected from the group consisting of diols having 2 to 14 carbon atoms, diesters of terephthalic acid with glycols having 2 to 4 carbon atoms, hydroxyalkylene ether of hydroquinone and ethoxylated bisphenol, and,
- D) from 0.5 to 10 wt. %, with reference to the weight of the total product, of a mixture prepared from
- a) 30 to 95 wt. % relative to the weight of the mixture of a hydroxyl-terminating hydrogenated polybutadiene of the formula (I)
- HO—CH2—CH2—[—(CH2—CH2)m—{CH2—CH(CH2—CH3)}n—]—CH2—CH2—OH (I)
- wherein the ratio m/n is from 3:1 to 1.33:1, having an average molecular weight Mn of 1000 to 10,000 g/mol, a functionality of from 1.9 to 2.0 and a polymolecularity index Mw/Mn of from 0.8 to 1.4, and
- b) 5 to 70 wt. % relative to the weight of the mixture of a hydroxyl-terminating hydrogenated polybutadiene of the formula (II)
- CH3—CH2—[—(CH2—CH2)p—{CH2—CH(CH2—CH3)}q—]—CH2—CH2—OH (II)
- wherein the ratio p/q is from 3:1 to 1.33:1, having an average molecular weight Mn of 500 to 10,000 g/mol, a functionality of from 0.9 to 1.0 and a polymolecularity index Mw/Mn of from 0.8 to 1.4,
- wherein the molar ratio of the NCO groups in A) to the groups capable of reacting with isocyanate in B), C) and D) is from 0.9 to 1.2 and wherein the sum of a) and b) totals 100 wt. %.
8 more elements
A thermoplastic polyurethane prepared by reacting
- A) an organic diisocyanate,
- B) at least one linear hydroxyl-terminating polyol having an average molecular weight Mn of 500 to 5,000 g/mol, selected from the group consisting of polyester diols, polyether diols and polycarbonate diol,
- C) a chain extender selected from the group consisting of (i) and (ii) wherein (i) is a diamine having an average molecular weight Mn of 60 to 500 g/mol and wherein (ii) is a member having a number average molecular weight of 60 to 450 g/mol, selected from the group consisting of diols having 2 to 14 carbon atoms, diesters of terephthalic acid with glycols having 2 to 4 carbon atoms, hydroxyalkylene ether of hydroquinone and ethoxylated bisphenol, and,
- D) from 0.5 to 10 wt. %, with reference to the weight of the total product, of a mixture prepared from
- a) 30 to 95 wt. % relative to the weight of the mixture of a hydroxyl-terminating hydrogenated polybutadiene of the formula (I)
- HO—CH2—CH2—[—(CH2—CH2)m—{CH2—CH(CH2—CH3)}n—]—CH2—CH2—OH (I)
- wherein the ratio m/n is from 3:1 to 1.33:1, having an average molecular weight Mn of 1000 to 10,000 g/mol, a functionality of from 1.9 to 2.0 and a polymolecularity index Mw/Mn of from 0.8 to 1.4, and
- b) 5 to 70 wt. % relative to the weight of the mixture of hydroxyl-terminating block copolymer prepared from polyisoprene and poly(co-ethylene-butylene-styrene), having a styrene unit content of approximately 40 wt. %, an average molecular weight Mn of 500 to 10,000 g/mol, a functionality of from 0.9 to 1.0 and a polymolecularity index Mw/Mn of from 0.8 to 1.4, and a molar ratio ethylene/butylene in the range of 3:1 to 1.33:1,
- wherein the molar ratio of the NCO groups in A) to the groups capable of reacting with isocyanate in B), C) and D) is from 0.9 to 1.2 and wherein the sum of a) and b) totals 100 wt. %.
6 more elements
Dependencies are inferred from the claim text.