US 12,421,384 B2
Transparent thermoplastic resin and method of preparing the same
Jiyoon Jeon, Daejeon (KR); Yong Yeon Hwang, Daejeon (KR); Bong Keun Ahn, Daejeon (KR); Min Jung Kim, Daejeon (KR); Jangwon Park, Daejeon (KR); Eunji Lee, Daejeon (KR); and Seyong Kim, Daejeon (KR)
Assigned to LG CHEM, LTD.
Appl. No. 17/765,888
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Jul. 19, 2021, PCT No. PCT/KR2021/009218
§ 371(c)(1), (2) Date Apr. 1, 2022,
PCT Pub. No. WO2022/035071, PCT Pub. Date Feb. 17, 2022.
Claims priority of application No. 10-2020-0100368 (KR), filed on Aug. 11, 2020; and application No. 10-2021-0091421 (KR), filed on Jul. 13, 2021.
Prior Publication US 2022/0372269 A1, Nov. 24, 2022
Int. Cl. C08L 51/04 (2006.01); C08L 33/10 (2006.01)
CPC C08L 51/04 (2013.01) [C08L 33/10 (2013.01); C08L 2203/30 (2013.01); C08L 2205/02 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A thermoplastic resin, comprising:
an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A), or
the copolymer (A) and a matrix resin (B) comprising one or more selected from the group consisting of an aromatic vinyl compound-vinyl cyanide compound-alkyl methacrylate copolymer and an alkyl methacrylate polymer,
wherein a transparency (haze), measured according to ASTM D-1003 under a condition of 3 mm thickness, is less than 5%,
a total content of the alkyl acrylate is from 20 to 50% by weight,
an alkyl acrylate coverage value (X) as calculated by Equation 1 below is 65 or more:
X={(G−Y)/Y}×100,  [Equation 1]
wherein G represents a total gel content (%) of the thermoplastic resin, and Y represents a content (% by weight) of the alkyl acrylate in the gel of the thermoplastic resin, and
wherein, based on 100% by weight in total of the copolymer (A), the copolymer (A) comprises:
from 30 to 50% by weight of alkyl acrylate rubber (a-1) having a DLS average particle diameter of from 50 to 120 nm or a TEM average particle diameter of from 32.5 to 84 nm, and
from 50 to 70% by weight of an aromatic vinyl compound-vinyl cyanide compound copolymer (a-2).