Polymer, production method for same, and molded article

Patent metadata

Field	Value
Publication number	US-2016237192-A1
Application number	US-201415029504-A
Country	US
Kind code	A1
Filing date	Oct 14, 2014
Priority date	Oct 16, 2013
Publication date	Aug 18, 2016
Grant date	—

Abstract

The present application pertains to a production method for a polymer, including a step for polymerizing a starting material composition (I) that includes: a monomer mixture (I-1) containing a macromonomer (a) represented by the following formula (1), and (b) a vinyl monomer; and 0.01 to 5 parts by mass of a non-metallic chain transfer agent with respect to 100 parts by mass of the monomer mixture (I-1); a polymer obtained by the production method; and a molded article. According to the present invention, there can be provided a polymer having exceptional resistance to dwell-induced degradation, and a molded article having exceptional yellowing resistance, a low haze value, and exceptional pliability.

First claim

1 : A method for producing a polymer, comprising:
polymerizing a starting material composition (I) comprising a monomer mixture (I-1) comprising a macromonomer (a) represented by a Formula (1) and a vinyl monomer (b) and 0.01 to 5 parts by mass of a non-metallic chain transfer agent with respect to 100 parts by mass of the monomer mixture (I-1):

wherein in Formula (1),
R and R 1 to R n each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a heterocyclic group,
X 1 to X n each independently represent a hydrogen atom or a methyl group,
Z represents a terminal group, and
n represents an integer of 2 to 10,000.

2 : The method according to claim 1 , wherein the polymerization of the starting material composition (I) is performed by suspension polymerization.

3 : The method according to claim 1 , wherein the macromonomer (a) is obtained by polymerizing a starting material composition (II) comprising: a monomer composition (II-1) comprising a (meth)acrylic acid ester; and a cobalt chain transfer agent.

4 : The method according to claim 3 , wherein the monomer composition (II-1) comprises 85 to 99% by mass of methacrylic acid ester and 1 to 15% by mass of acrylic acid ester with respect to the total mass of the monomer composition (II-1).

5 : The method according to claim 1 , wherein
the vinyl monomer (b) comprises a vinyl monomer (b-1) having a Tg of homopolymer of 25° C. or higher and a vinyl monomer (b-2) having a Tg of homopolymer of lower than 25° C., and a content (X % by mass) of the vinyl monomer (b-1) in the vinyl monomer (b) and a content (Y % by mass) of the macromonomer (a) in the monomer mixture (I-1) satisfy Formulae (2) and (3):
45≧ Y≧− 0.5 X+ 45  (2)

5≦ X≦ 55  (3).

6 : The method according to claim 1 , wherein
the vinyl monomer (b) comprises a vinyl monomer (b-1) having a Tg of homopolymer of 25° C. or higher and a vinyl monomer (b-2) having a Tg of homopolymer of lower than 25° C., and a content (X % by mass) of the vinyl monomer (b-1) in the vinyl monomer (b) and a content (Y % by mass) of the macromonomer (a) in the monomer mixture (I-1) satisfy Formulae (4) and (5):
45≧ Y≧−X+ 75  (4)

30< X< 75  (5).

7 : The method according to claim 1 , wherein
the vinyl monomer (b) comprises a vinyl monomer (b-1) having a Tg of homopolymer of 25° C. or higher and a vinyl monomer (b-2) having a Tg of homopolymer of lower than 25° C., and a content (X % by mass) of the vinyl monomer (b-1) in the vinyl monomer (b) and a content (Y % by mass) of the macromonomer (a) in the monomer mixture (I-1) satisfy Formulae (6) and (7):
5≦ Y≦ 45  (6)

75≦ X≦ 100  (7).

8 : The method according to claim 1 , wherein the vinyl monomer (b) comprises a (meth)acrylic acid ester.

9 : A polymer produced by the method according to claim 1 .

10 : The polymer according to claim 9 , wherein a molecular weight distribution (mass average molecular weight/number average molecular weight) is 23 or less.

11 : The polymer according to claim 9 , wherein a mass average molecular weight is 100,000 or more.

12 : The polymer according to claim 9 , wherein a 5% by mass reduction temperature is 280° C. or higher.

13 : The polymer according to claim 9 , wherein a melt index retention rate is 95 to 110%.

14 : The polymer according to claim 9 , wherein an elastic modulus is 1,000 MPa or less.

15 : A molded article obtained by molding a molding material comprising the polymer according to claim 9 .

16 : The method according to claim 2 , wherein the vinyl monomer (b) comprises a (meth)acrylic acid ester.

17 : The method according to claim 3 , wherein the vinyl monomer (b) comprises a (meth)acrylic acid ester.

18 : The method according to claim 4 , wherein the vinyl monomer (b) comprises a (meth)acrylic acid ester.

19 : The method according to claim 5 , wherein the vinyl monomer (b) comprises a (meth)acrylic acid ester.

20 : The method according to claim 6 , wherein the vinyl monomer (b) comprises a (meth)acrylic acid ester.

21 : The method according to claim 7 , wherein the vinyl monomer (b) comprises a (meth)acrylic acid ester.

Assignees

• Mitsubishi Rayon Co

Inventors

• Fujiyama Kousuke
• Nishimura Masanari
• Hikita Shingo
• Nakaya Fuminori
• Oonuma Taeko
• Noda Tetsuya

Classifications

• C08F210/14

  Monomers containing five or more carbon atoms · CPC title

• C08F2/38 Primary

  Polymerisation using regulators, e.g. chain terminating agents {, e.g. telomerisation} · CPC title

• C08F2438/00

  Living radical polymerisation · CPC title

• C08F290/04

  Polymers provided for in subclasses C08C or C08F · CPC title

• C08F2/18 Primary

  Suspension polymerisation · CPC title